Merge vers main

.idea/.idea.Knots/.idea/dataSources.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="@romaric-thibault.fr" uuid="821fc51f-62ea-4fa2-99b3-cb667f09e32a">
+      <driver-ref>sqlserver.jb</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>com.jetbrains.jdbc.sqlserver.SqlServerDriver</jdbc-driver>
+      <jdbc-url>Server=romaric-thibault.fr,1433</jdbc-url>
+      <jdbc-additional-properties>
+        <property name="com.intellij.clouds.kubernetes.db.host.port" />
+        <property name="com.intellij.clouds.kubernetes.db.enabled" value="false" />
+        <property name="com.intellij.clouds.kubernetes.db.container.port" />
+      </jdbc-additional-properties>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </component>
+</project>

Knots/DTO/Discussion/CreateDiscussionDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Discussion;
+
+public class CreateDiscussionDto
+{
+    public int Id { get; set; }
+}

Knots/DTO/Discussion/DeleteDiscussionDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Discussion;
+
+public class DeleteDiscussionDto
+{
+    public int Id { get; set; }
+}

Knots/DTO/Discussion/GetDiscussionDto.cs

@@ -0,0 +1,11 @@
+namespace Knots.DTO.Discussion;
+
+public class GetDiscussionDto
+{
+    public int Id { get; set; }
+    public string Name { get; set; } = string.Empty;
+    public bool IsGroup { get; set; }
+    public int? MembersCount { get; set; }
+    
+    public int? GroupId { get; set; }
+}

Knots/DTO/Group/CreateGroupDto.cs

@@ -0,0 +1,8 @@
+namespace Knots.DTO.Group;
+
+public class CreateGroupDto
+{
+    public string? Nom { get; set; }
+    public int NombreMembres { get; set; }
+    public string? ProfilePicture { get; set; }
+}

Knots/DTO/Group/DeleteGroupDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Group;
+
+public class DeleteGroupDto
+{
+    public int? Id { get; set; }
+}

Knots/DTO/Group/GetGroupDetailsDto.cs

@@ -0,0 +1,9 @@
+namespace Knots.DTO.Group;
+
+public class GetGroupDetailsDto
+{
+    public int Id { get; set; }
+    public string? Nom { get; set; }
+    public int NombreMembres { get; set; }
+    public string? ProfilePicture { get; set; }
+}

Knots/DTO/Group/GetGroupDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Group;
+
+public class GetGroupDto
+{
+    public int Id { get; set; }
+}

Knots/DTO/Group/UpdateGroupDto.cs

@@ -0,0 +1,9 @@
+namespace Knots.DTO.Group;
+
+public class UpdateGroupDto
+{
+    public int Id { get; set; }
+    public string? Nom { get; set; }
+    public int NombreMembres { get; set; }
+    public string? ProfilePicture { get; set; }
+}

Knots/DTO/Group/UpdateGroupMembersAmountDto.cs

@@ -0,0 +1,7 @@
+namespace Knots.DTO.Group;
+
+public class UpdateGroupMembersAmountDto
+{
+    public int Id { get; set; }
+    public int MembersAmount { get; set; }
+}

Knots/DTO/Group/UpdateGroupNameDto.cs

@@ -0,0 +1,7 @@
+namespace Knots.DTO.Group;
+
+public class UpdateGroupNameDto
+{
+    public int Id { get; set; }
+    public string? Name { get; set; }
+}

Knots/DTO/Group/UpdateGroupProfilePictureDto.cs

@@ -0,0 +1,7 @@
+namespace Knots.DTO.Group;
+
+public class UpdateGroupProfilePictureDto
+{
+    public int Id { get; set; }
+    public string? ProfilePicture { get; set; }
+}

Knots/DTO/Key/CreateKeyDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Key;
+
+public class CreateKeyDto
+{
+    public string? EnKey { get; set; }
+}

Knots/DTO/Key/DeleteKeyDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Key;
+
+public class DeleteKeyDto
+{
+    public int Id { get; set; }
+}

Knots/DTO/Key/GetKeyDetailsDto.cs

@@ -0,0 +1,7 @@
+namespace Knots.DTO.Key;
+
+public class GetKeyDetailsDto
+{
+    public int Id { get; set; }
+    public string? EnKey { get; set; }
+}

Knots/DTO/Key/GetKeyDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Key;
+
+public class GetKeyDto
+{
+    public int Id { get; set; }
+}

Knots/DTO/Message/CreateMessageDto.cs

@@ -0,0 +1,8 @@
+namespace Knots.DTO.Message;
+
+public class CreateMessageDto
+{
+    public string? Contenu { get; set; }
+    public DateTime Date { get; set; }
+    public Boolean Type { get; set; }
+}

Knots/DTO/Message/DeleteMessageDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Message;
+
+public class DeleteMessageDto
+{
+    public int Id { get; set; }
+}

Knots/DTO/Message/GetMessageDetailsDto.cs

@@ -0,0 +1,12 @@
+namespace Knots.DTO.Message;
+
+public class GetMessageDetailsDto
+{
+    public int Id { get; set; }
+    public string? Contenu { get; set; }
+    public DateTime Date { get; set; }
+    public Boolean Type { get; set; }
+    
+    public int UserId { get; set; }  
+    public string AuthorName { get; set; } = "";
+}

Knots/DTO/Message/GetMessageDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Message;
+
+public class GetMessageDto
+{
+   public int Id { get; set; }
+}

Knots/DTO/Role/CreateRoleDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Role;
+
+public class CreateRoleDto
+{
+    public string? Libelle  { get; set; }
+}

Knots/DTO/Role/DeleteRoleDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Role;
+
+public class DeleteRoleDto
+{
+    public int Id  { get; set; }
+}

Knots/DTO/Role/GetRoleDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.Role;
+
+public class GetRoleDto
+{
+    public string? Libelle { get; set; }
+}

Knots/DTO/User/CreateUserDto.cs

@@ -0,0 +1,11 @@
+namespace Knots.DTO.User;
+
+public class CreateUserDto
+{
+    public string? Username { get; set; }
+    public string? Description {get; set;}
+    public string? Password { get; set; }
+    public string? Email { get; set; }
+    public string? Tel { get; set; }
+    public string? ProfilePicture { get; set; }
+}

Knots/DTO/User/DeleteUserDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.User;
+
+public class DeleteUserDto
+{
+    public string? Username { get; set; }
+}

Knots/DTO/User/GetUserDetailsDto.cs

@@ -0,0 +1,11 @@
+namespace Knots.DTO.User;
+
+public class GetUserDetailsDto
+{
+    public string? Username { get; set; }
+    public string? Description {get; set;}
+    public string? Password { get; set; }
+    public string? Email { get; set; }
+    public string? Tel { get; set; }
+    public string? ProfilePicture { get; set; }
+}

Knots/DTO/User/GetUserDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.User;
+
+public class GetUserDto
+{
+    public string? Username { get; set; }
+}

Knots/DTO/User/LoginResponseDto.cs

@@ -0,0 +1,12 @@
+namespace Knots.DTO.User;
+
+public class LoginResponseDto
+{
+    public string? Token { get; set; }
+    public int Id { get; set; }
+    public string? Username { get; set; }
+    public string? Email { get; set; }
+    public string? Tel { get; set; }
+    public string? ProfilePicture { get; set; }
+    public string? Description { get; set; }
+}

Knots/DTO/User/LoginUserDto.cs

@@ -0,0 +1,7 @@
+namespace Knots.DTO.User;
+
+public class LoginUserDto
+{
+    public string? Username { get; set; }
+    public string? Password { get; set; }
+}

Knots/DTO/User/UpdateUserContactDto.cs

@@ -0,0 +1,8 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserContactDto
+{
+    public int Id { get; set; }
+    public string? Email { get; set; }
+    public string? Tel { get; set; }
+}

Knots/DTO/User/UpdateUserDescriptionDto.cs

@@ -0,0 +1,7 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserDescriptionDto
+{
+    public int Id { get; set; }
+    public string? Description {get; set;}
+}

Knots/DTO/User/UpdateUserDto.cs

@@ -0,0 +1,6 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserDto
+{
+    public int Id { get; set; }
+}

Knots/DTO/User/UpdateUserPasswordDto.cs

@@ -0,0 +1,7 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserPasswordDto
+{
+    public int Id { get; set; }
+    public string? Password { get; set; }
+}

Knots/DTO/User/UpdateUserProfilePictureDto.cs

@@ -0,0 +1,7 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserProfilePictureDto
+{
+    public int Id { get; set; }
+    public string? ProfilePicture { get; set; }
+}

Knots/DTO/User/UpdateUsernameDto.cs

@@ -0,0 +1,7 @@
+namespace Knots.DTO.User;
+
+public class UpdateUsernameDto
+{
+    public int Id { get; set; }
+    public string? Username { get; set; }
+}

Knots/Endpoints/Discussion/CreateDiscussionEndpoint.cs

@@ -0,0 +1,21 @@
+using FastEndpoints;
+using Knots.DTO.Discussion;
+
+namespace Knots.Endpoints.Discussion;
+
+public class CreateDiscussionEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<CreateDiscussionDto>
+{
+    public override void Configure()
+    {
+        Post("/discussions");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(CreateDiscussionDto req, CancellationToken ct)
+    {
+        Models.Discussion? discussion = mapper.Map<Models.Discussion>(req);
+        db.Discussions.Add(discussion);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Discussion/CreateGroupDiscussionEndpoint.cs

@@ -0,0 +1,91 @@
+using FastEndpoints;
+using Knots.DTO.Discussion;
+using Knots.Models;
+using Microsoft.EntityFrameworkCore;
+using System.Security.Claims;
+using Knots.Services;
+
+namespace Knots.Endpoints.Discussion;
+
+public class CreateGroupDiscussionEndpoint(KnotsDbContext db, EncryptionService encryption) : Endpoint<CreateGroupDiscussionRequest, GetDiscussionDto>
+{
+    public override void Configure()
+    {
+        Post("/discussions/group");
+    }
+
+    public override async Task HandleAsync(CreateGroupDiscussionRequest req, CancellationToken ct)
+    {
+        int currentUserId = int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)!);
+
+        if (req.Usernames == null || req.Usernames.Count == 0)
+        {
+            await SendErrorsAsync(400, ct);
+            return;
+        }
+
+        List<Models.User> targets = await db.Users
+            .Where(u => req.Usernames.Contains(u.Username!))
+            .ToListAsync(ct);
+
+        if (targets.Count != req.Usernames.Count)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        if (targets.Any(t => t.Id == currentUserId))
+        {
+            await SendErrorsAsync(400, ct);
+            return;
+        }
+
+        int totalMembers = targets.Count + 1;
+
+        Models.Discussion discussion = new()
+        {
+            IsGroup = true,
+            Key = new Models.Key { EnKey = encryption.GenerateKey() },
+            UserDiscussions = targets
+                .Select(t => new UserDiscussion { UserId = t.Id })
+                .Append(new UserDiscussion { UserId = currentUserId })
+                .ToList()
+        };
+
+        db.Discussions.Add(discussion);
+        await db.SaveChangesAsync(ct); // discussion.Id disponible
+
+
+        Models.Group group = new()
+        {
+            Name = req.GroupName,
+            MembersAmount = totalMembers,
+            DiscussionId = discussion.Id,
+            GroupUsers = targets
+                .Select(t => new GroupUser { UserId = t.Id })
+                .Append(new GroupUser { UserId = currentUserId })
+                .ToList()
+        };
+
+        db.Groups.Add(group);
+        await db.SaveChangesAsync(ct); // group.Id disponible
+
+
+        discussion.GroupId = group.Id;
+        await db.SaveChangesAsync(ct);
+
+        await SendOkAsync(new GetDiscussionDto
+        {
+            Id = discussion.Id,
+            IsGroup = true,
+            Name = group.Name,
+            MembersCount = totalMembers
+        }, ct);
+    }
+}
+
+public class CreateGroupDiscussionRequest
+{
+    public string GroupName { get; set; } = "";
+    public List<string> Usernames { get; set; } = [];
+}

Knots/Endpoints/Discussion/CreatePrivateDiscussionEndpoint.cs

@@ -0,0 +1,85 @@
+using FastEndpoints;
+using Knots.DTO.Discussion;
+using Knots.Models;
+using Microsoft.EntityFrameworkCore;
+using System.Security.Claims;
+using Knots.Services;
+
+namespace Knots.Endpoints.Discussion;
+
+public class CreatePrivateDiscussionEndpoint(KnotsDbContext db, EncryptionService encryption)
+    : Endpoint<CreatePrivateDiscussionRequest, GetDiscussionDto>
+{
+    public override void Configure()
+    {
+        Post("/discussions/private");
+    }
+
+    public override async Task HandleAsync(CreatePrivateDiscussionRequest req, CancellationToken ct)
+    {
+        int currentUserId = int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)!);
+
+        // 1. retrouver l'utilisateur cible par son nom
+        Models.User? target = await db.Users
+            .SingleOrDefaultAsync(u => u.Username == req.Username, ct);
+
+        if (target is null)
+        {
+            await SendNotFoundAsync(ct);   // utilisateur introuvable
+            return;
+        }
+
+        if (target.Id == currentUserId)
+        {
+            await SendErrorsAsync(400, ct); // pas de discussion avec soi-même
+            return;
+        }
+
+        // 2. vérifier qu'une discussion privée entre les deux n'existe pas déjà
+        Models.Discussion? existing = await db.Discussions
+            .Where(d => d.GroupId == null
+                && d.UserDiscussions.Any(ud => ud.UserId == currentUserId)
+                && d.UserDiscussions.Any(ud => ud.UserId == target.Id))
+            .FirstOrDefaultAsync(ct);
+
+        if (existing is not null)
+        {
+            await SendOkAsync(new GetDiscussionDto
+            {
+                Id = existing.Id,
+                IsGroup = false,
+                Name = target.Username!,
+                MembersCount = null
+            }, ct);
+            return;
+        }
+
+        // 3. créer la discussion + les deux participants
+        Models.Discussion discussion = new()
+        {
+            IsGroup = false,
+            Key = new Models.Key { EnKey = encryption.GenerateKey() },
+            UserDiscussions =
+            [
+                new UserDiscussion { UserId = currentUserId },
+                new UserDiscussion { UserId = target.Id }
+            ]
+        };
+
+        db.Discussions.Add(discussion);
+        await db.SaveChangesAsync(ct);
+
+        await SendOkAsync(new GetDiscussionDto
+        {
+            Id = discussion.Id,
+            IsGroup = false,
+            Name = target.Username!,
+            MembersCount = null
+        }, ct);
+    }
+}
+
+public class CreatePrivateDiscussionRequest
+{
+    public string Username { get; set; } = "";
+}

Knots/Endpoints/Discussion/DeleteDiscussionEndpoint.cs

@@ -0,0 +1,21 @@
+using FastEndpoints;
+using Knots.DTO.Discussion;
+
+namespace Knots.Endpoints.Discussion;
+
+public class DeleteDiscussionEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<DeleteDiscussionDto>
+{
+    public override void Configure()
+    {
+        Delete("/discussions");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(DeleteDiscussionDto req, CancellationToken ct)
+    {
+        Models.Discussion? discussion = mapper.Map<Models.Discussion>(req);
+        db.Discussions.Remove(discussion);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Discussion/GetDiscussionEndpoint.cs

@@ -0,0 +1,29 @@
+using Knots.DTO.Discussion;
+using Knots.DTO.Key;
+using Microsoft.EntityFrameworkCore;
+using FastEndpoints;
+
+namespace Knots.Endpoints.Discussion;
+
+public class GetDiscussionEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<GetDiscussionDto>
+{
+    public override void Configure()
+    {
+        Get("/discussions");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(GetDiscussionDto req, CancellationToken ct)
+    {
+        Models.Discussion? databaseDiscussion = await db.Discussions.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);     
+        
+        if (databaseDiscussion == null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        var keyDto = mapper.Map<GetKeyDetailsDto>(databaseDiscussion);
+        await SendOkAsync(keyDto, ct);
+    }
+}

Knots/Endpoints/Discussion/GetDiscussionMembersEndpoint.cs

@@ -0,0 +1,35 @@
+using System.Security.Claims;
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Discussion;
+
+public class GetDiscussionMembersEndpoint(KnotsDbContext db) : EndpointWithoutRequest<List<string>>
+{
+    public override void Configure()
+    {
+        Get("/discussions/{discussionId}/members");
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        int discussionId = Route<int>("discussionId");
+
+        Models.Discussion? discussion = await db.Discussions
+            .Include(d => d.UserDiscussions)
+            .ThenInclude(ud => ud.User)
+            .SingleOrDefaultAsync(d => d.Id == discussionId, ct);
+
+        if (discussion is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        List<string> members = discussion.UserDiscussions
+            .Select(ud => ud.User.Username!)
+            .ToList();
+
+        await SendOkAsync(members, ct);
+    }
+}

Knots/Endpoints/Discussion/GetDiscussionMembersWithRolesEndpoint.cs

@@ -0,0 +1,52 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Discussion;
+
+public class GetDiscussionMembersWithRolesEndpoint(KnotsDbContext db) : EndpointWithoutRequest<List<MemberWithRoleDto>>
+{
+    public override void Configure()
+    {
+        Get("/discussions/{discussionId}/members/roles");
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        int discussionId = Route<int>("discussionId");
+
+        Models.Discussion? discussion = await db.Discussions
+            .Include(d => d.Group)
+            .ThenInclude(g => g!.GroupUsers)
+            .ThenInclude(gu => gu.User)
+            .Include(d => d.Group)
+            .ThenInclude(g => g!.GroupUsers)
+            .ThenInclude(gu => gu.Role)
+            .SingleOrDefaultAsync(d => d.Id == discussionId, ct);
+
+        if (discussion?.Group is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        List<MemberWithRoleDto> members = discussion.Group.GroupUsers
+            .Select(gu => new MemberWithRoleDto
+            {
+                UserId = gu.UserId,
+                Username = gu.User.Username!,
+                RoleId = gu.RoleId,
+                RoleLibelle = gu.Role?.Libelle
+            })
+            .ToList();
+
+        await SendOkAsync(members, ct);
+    }
+}
+
+public class MemberWithRoleDto
+{
+    public int UserId { get; set; }
+    public string Username { get; set; } = "";
+    public int? RoleId { get; set; }
+    public string? RoleLibelle { get; set; }
+}

Knots/Endpoints/Discussion/GetMyDiscussionEndpoint.cs

@@ -0,0 +1,50 @@
+using System.Security.Claims;
+using FastEndpoints;
+using Knots.DTO.Discussion;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Discussion;
+
+public class GetMyDiscussionEndpoint(KnotsDbContext db) : EndpointWithoutRequest<List<GetDiscussionDto>>
+{
+    public override void Configure()
+    {
+        Get("/discussions/my");
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        int userId = int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)!);
+
+        // Discussions privées : l'utilisateur est l'un des participants
+        IQueryable<GetDiscussionDto> privees = db.Discussions
+            .Where(d => d.GroupId == null && d.UserDiscussions.Any(ud => ud.UserId == userId))
+            .Select(d => new GetDiscussionDto
+            {
+                Id = d.Id,
+                IsGroup = false,
+                Name = d.UserDiscussions
+                    .Where(ud => ud.UserId != userId)
+                    .Select(ud => ud.User.Username)
+                    .FirstOrDefault() ?? "",
+                MembersCount = null,
+                GroupId = null 
+            });
+
+        // Discussions de groupe : l'utilisateur est membre du groupe
+        IQueryable<GetDiscussionDto> groupes = db.Discussions
+            .Where(d => d.Group != null && d.Group.GroupUsers.Any(gu => gu.UserId == userId))
+            .Select(d => new GetDiscussionDto
+            {
+                Id = d.Id,
+                IsGroup = true,
+                Name = d.Group!.Name!,
+                MembersCount = d.Group.MembersAmount,
+                GroupId = d.Group.Id
+            });
+
+        List<GetDiscussionDto> discussions = await privees.Concat(groupes).ToListAsync(ct);
+
+        await SendOkAsync(discussions, ct);
+    }
+}

Knots/Endpoints/Group/CreateGroupEndpoint.cs

@@ -0,0 +1,21 @@
+using Knots.DTO.Group;
+using FastEndpoints;
+
+namespace Knots.Endpoints.Group;
+
+public class CreateGroupEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<CreateGroupDto>
+{
+    public override void Configure()
+    {
+        Post("/groups");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(CreateGroupDto req, CancellationToken ct)
+    {
+        Models.Group? group = mapper.Map<Models.Group>(req);
+        db.Groups.Add(group);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Group/DeleteGroupEndpoint.cs

@@ -0,0 +1,21 @@
+using FastEndpoints;
+using Knots.DTO.Group;
+
+namespace Knots.Endpoints.Group;
+
+public class DeleteGroupEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<DeleteGroupDto>
+{
+    public override void Configure()
+    {
+        Delete("/groups");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(DeleteGroupDto req, CancellationToken ct)
+    {
+        Models.Group? group = mapper.Map<Models.Group>(req);
+        db.Groups.Remove(group);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Group/GetGroupEndpoint.cs

@@ -0,0 +1,29 @@
+using FastEndpoints;
+using Knots.DTO.Group;
+using Knots.DTO.Key;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Group;
+
+public class GetGroupEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<GetGroupDetailsDto>
+{
+    public override void Configure()
+    {
+        Get("/groups");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(GetGroupDetailsDto req, CancellationToken ct)
+    {
+        Models.Group? databaseGroup = await db.Groups.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);     
+        
+        if (databaseGroup == null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        var keyDto = mapper.Map<GetKeyDetailsDto>(databaseGroup);
+        await SendOkAsync(keyDto, ct);
+    }
+}

Knots/Endpoints/Group/PatchGroupMembersAmountEndpoint.cs

@@ -0,0 +1,29 @@
+using FastEndpoints;
+using Knots.DTO.Group;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Group;
+
+public class PatchGroupMembersAmountEndpoint(KnotsDbContext knotsDbContext) : Endpoint<UpdateGroupMembersAmountDto>
+{
+    public override void Configure()
+    {
+        Patch("/groups/{@Id}/membersAmount/", x => new {x.Id});
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(UpdateGroupMembersAmountDto req, CancellationToken ct)
+    {
+        Models.Group? databaseGroup = await knotsDbContext.Groups.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);
+
+        if (databaseGroup is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        databaseGroup.MembersAmount = req.MembersAmount;
+        await knotsDbContext.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Group/PatchGroupNameEndpoint.cs

@@ -0,0 +1,29 @@
+using FastEndpoints;
+using Knots.DTO.Group;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Group;
+
+public class PatchGroupNameEndpoint(KnotsDbContext knotsDbContext) : Endpoint<UpdateGroupNameDto>
+{
+    public override void Configure()
+    {
+        Patch("/groups/{@Id}/name/", x => new {x.Id});
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(UpdateGroupNameDto req, CancellationToken ct)
+    {
+        Models.Group? databaseGroup = await knotsDbContext.Groups.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);
+
+        if (databaseGroup is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        databaseGroup.Name = req.Name;
+        await knotsDbContext.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Group/PatchGroupProfilePictureEndpoint.cs

@@ -0,0 +1,29 @@
+using FastEndpoints;
+using Knots.DTO.Group;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Group;
+
+public class PatchGroupProfilePictureEndpoint(KnotsDbContext knotsDbContext) : Endpoint<UpdateGroupProfilePictureDto>
+{
+    public override void Configure()
+    {
+        Patch("/groups/{@Id}/profilePicture/", x => new {x.Id});
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(UpdateGroupProfilePictureDto req, CancellationToken ct)
+    {
+        Models.Group? databaseGroup = await knotsDbContext.Groups.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);
+
+        if (databaseGroup is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        databaseGroup.ProfilePicture = req.ProfilePicture;
+        await knotsDbContext.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Key/CreateKeyEndpoint.cs

@@ -0,0 +1,21 @@
+using Knots.DTO.Key;
+using FastEndpoints;
+
+namespace Knots.Endpoints.Key;
+
+public class CreateKeyEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<CreateKeyDto>
+{
+    public override void Configure()
+    {
+        Post("/keys");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(CreateKeyDto req, CancellationToken ct)
+    {
+        Models.Key? key = mapper.Map<Models.Key>(req);
+        db.Keys.Add(key);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Key/DeleteKeyEndpoint.cs

@@ -0,0 +1,21 @@
+using FastEndpoints;
+using Knots.DTO.Key;
+
+namespace Knots.Endpoints.Key;
+
+public class DeleteKeyEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<DeleteKeyDto>
+{
+    public override void Configure()
+    {
+        Delete("/keys");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(DeleteKeyDto req, CancellationToken ct)
+    {
+        Models.Key? key = mapper.Map<Models.Key>(req);
+        db.Keys.Remove(key);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Key/GetKeyEndpoint.cs

@@ -0,0 +1,29 @@
+using FastEndpoints;
+using Knots.DTO.Key;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Key;
+
+public class GetKeyEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint <GetKeyDetailsDto>
+{
+    public override void Configure()
+    { 
+        Get("/keys/{@Id}");
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(GetKeyDetailsDto req, CancellationToken ct)
+    {
+        Models.Key? databaseKey = await db.Keys.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);     
+        
+        if (databaseKey == null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        var keyDto = mapper.Map<GetKeyDetailsDto>(databaseKey);
+        await SendOkAsync(keyDto, ct);
+    }
+}

Knots/Endpoints/Message/CreateMessageEndpoint.cs

@@ -0,0 +1,21 @@
+using FastEndpoints;
+using Knots.DTO.Message;
+
+namespace Knots.Endpoints.Message;
+
+public class CreateMessageEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<CreateMessageDto>
+{
+    public override void Configure()
+    {
+        Post("/messages");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(CreateMessageDto req, CancellationToken ct)
+    {
+        Models.Message? message = mapper.Map<Models.Message>(req);
+        db.Messages.Add(message);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Message/DeleteMessageEndpoint.cs

@@ -0,0 +1,21 @@
+using FastEndpoints;
+using Knots.DTO.Message;
+
+namespace Knots.Endpoints.Message;
+
+public class DeleteMessageEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<DeleteMessageDto>
+{
+    public override void Configure()
+    {
+        Delete("/messages");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(DeleteMessageDto req, CancellationToken ct)
+    {
+        Models.Message? message = mapper.Map<Models.Message>(req);
+        db.Messages.Remove(message);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Message/GetMessageEndpoint.cs

@@ -0,0 +1,62 @@
+using System.Security.Claims;
+using FastEndpoints;
+using Knots.DTO.Message;
+using Knots.DTO.User;
+using Knots.Services;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Message;
+
+public class GetMessageEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper, EncryptionService encryption) : Endpoint<GetDiscussionMessagesRequest, List<GetMessageDetailsDto>>
+{
+    public override void Configure()
+    { 
+        Get("/discussions/{DiscussionId}/messages");
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(GetDiscussionMessagesRequest req, CancellationToken ct)
+    {
+        int userId = int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)!);
+
+        // l'utilisateur participe-t-il à cette discussion (privée ou via le groupe) ?
+        bool autorise = await db.Discussions
+            .Where(d => d.Id == req.DiscussionId)
+            .AnyAsync(d =>
+                d.UserDiscussions.Any(ud => ud.UserId == userId) ||
+                (d.Group != null && d.Group.GroupUsers.Any(gu => gu.UserId == userId)), ct);
+
+        if (!autorise)
+        {
+            await SendForbiddenAsync(ct);
+            return;
+        }
+
+        string? key = await db.Discussions
+            .Where(d => d.Id == req.DiscussionId)
+            .Select(d => d.Key!.EnKey)
+            .SingleAsync(ct);
+
+        var rows = await db.Messages
+            .Where(m => m.DiscussionId == req.DiscussionId)
+            .OrderBy(m => m.Date)
+            .Select(m => new { m.Id, m.Contenu, m.Date, m.UserId, AuthorName = m.User.Username! })
+            .ToListAsync(ct);
+
+        List<GetMessageDetailsDto> messages = rows.Select(m => new GetMessageDetailsDto
+        {
+            Id        = m.Id,
+            Contenu   = encryption.Decrypt(m.Contenu!, key!),
+            Date      = m.Date,
+            UserId    = m.UserId,       
+            AuthorName = m.AuthorName
+        }).ToList();
+
+        await SendOkAsync(messages, ct);
+    }
+}
+
+public class GetDiscussionMessagesRequest
+{
+    public int DiscussionId { get; set; }
+}

Knots/Endpoints/Role/AssignRoleEndpoint.cs

@@ -0,0 +1,45 @@
+using FastEndpoints;
+using Knots.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Role;
+
+public class AssignRoleEndpoint(KnotsDbContext db) : Endpoint<AssignRoleRequest>
+{
+    public override void Configure()
+    {
+        Post("/groups/{groupId}/members/{userId}/role");
+    }
+
+    public override async Task HandleAsync(AssignRoleRequest req, CancellationToken ct)
+    {
+        int groupId = Route<int>("groupId");
+        int userId = Route<int>("userId");
+
+        GroupUser? groupUser = await db.GroupUsers
+            .SingleOrDefaultAsync(gu => gu.GroupId == groupId && gu.UserId == userId, ct);
+
+        if (groupUser is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        bool roleExists = await db.Roles.AnyAsync(r => r.Id == req.RoleId, ct);
+        if (!roleExists)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        groupUser.RoleId = req.RoleId;
+        await db.SaveChangesAsync(ct);
+
+        await SendOkAsync(ct);
+    }
+}
+
+public class AssignRoleRequest
+{
+    public int RoleId { get; set; }
+}

Knots/Endpoints/Role/CreateRoleEndpoint.cs

@@ -0,0 +1,32 @@
+using FastEndpoints;
+using Knots.Models;
+
+namespace Knots.Endpoints.Role;
+
+public class CreateRoleEndpoint(KnotsDbContext db) : Endpoint<CreateRoleRequest, RoleDto>
+{
+    public override void Configure()
+    {
+        Post("/roles");
+    }
+
+    public override async Task HandleAsync(CreateRoleRequest req, CancellationToken ct)
+    {
+        Models.Role role = new() { Libelle = req.Libelle };
+        db.Roles.Add(role);
+        await db.SaveChangesAsync(ct);
+
+        await SendOkAsync(new RoleDto { Id = role.Id, Libelle = role.Libelle! }, ct);
+    }
+}
+
+public class CreateRoleRequest
+{
+    public string Libelle { get; set; } = "";
+}
+
+public class RoleDto
+{
+    public int Id { get; set; }
+    public string Libelle { get; set; } = "";
+}

Knots/Endpoints/Role/DeleteRoleEndpoint.cs

@@ -0,0 +1,21 @@
+using FastEndpoints;
+using Knots.DTO.Role;
+
+namespace Knots.Endpoints.Role;
+
+public class DeleteRoleEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<DeleteRoleDto>
+{
+    public override void Configure()
+    {
+        Delete("/roles");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(DeleteRoleDto req, CancellationToken ct)
+    {
+        Models.Role? role = mapper.Map<Models.Role>(req);
+        db.Roles.Remove(role);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/Role/GetRoleEndpoint.cs

@@ -0,0 +1,29 @@
+using FastEndpoints;
+using Knots.DTO.Role;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.Role;
+
+public class GetRoleEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint <GetRoleDto>
+{
+    public override void Configure()
+    { 
+        Get ("/roles/{@Id}", x => new { x.Libelle });
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(GetRoleDto req, CancellationToken ct)
+    {
+        Models.Role? databaseRole = await db.Roles.SingleOrDefaultAsync(x => x.Libelle == req.Libelle, cancellationToken: ct);     
+        
+        if (databaseRole == null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        var roleDto = mapper.Map<GetRoleDto>(databaseRole);
+        await SendOkAsync(roleDto, ct);
+    }
+}

Knots/Endpoints/User/CreateUserEndpoint.cs

@@ -0,0 +1,33 @@
+using FastEndpoints;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+public class CreateUserEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<CreateUserDto, GetUserDto>
+{
+    public override void Configure()
+    {
+        Post("/users");
+        AllowAnonymous();
+    }
+    
+    public override async Task HandleAsync(CreateUserDto req, CancellationToken ct)
+    {
+        bool usernameExists = await db.Users
+            .AnyAsync(x => x.Username == req.Username, cancellationToken: ct);
+
+        if (usernameExists)
+        {
+            AddError(x => x.Username, "Ce nom d'utilisateur est déjà pris.");
+            await SendErrorsAsync(cancellation: ct);
+            return;
+        }
+        
+        req.Password = BCrypt.Net.BCrypt.HashPassword(req.Password);
+        Models.User? user = mapper.Map<Models.User>(req);
+        db.Users.Add(user);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/User/DeleteUserEndpoint.cs

@@ -0,0 +1,21 @@
+using FastEndpoints;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+public class DeleteUserEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint <DeleteUserDto>
+{
+    public override void Configure()
+    { 
+        Delete ("/users/{@Id}");
+    }
+
+    public override async Task HandleAsync(DeleteUserDto req, CancellationToken ct)
+    {
+        Models.User? user = mapper.Map<Models.User>(req);
+        db.Users.Add(user);
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/User/GetAllUsersEndpoint.cs

@@ -0,0 +1,24 @@
+using AutoMapper.QueryableExtensions;
+using FastEndpoints;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+public class GetAllUsersEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : EndpointWithoutRequest<List<GetUserDetailsDto>>
+{
+    public override void Configure()
+    { 
+        Get ("/users");
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        var users = await db.Users
+            .ProjectTo<GetUserDetailsDto>(mapper.ConfigurationProvider)
+            .ToListAsync(ct);
+        
+        await SendOkAsync(users, ct);
+    }
+}

Knots/Endpoints/User/GetUserEndpoint.cs

@@ -0,0 +1,28 @@
+using FastEndpoints;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+public class GetUserEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint <GetUserDetailsDto>
+{
+    public override void Configure()
+    { 
+        Get ("/users/{@Id}", x => new { x.Username });
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(GetUserDetailsDto req, CancellationToken ct)
+    {
+        Models.User? databaseUser = await db.Users.SingleOrDefaultAsync(x => x.Username == req.Username, cancellationToken: ct);     
+        
+        if (databaseUser == null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        var userDto = mapper.Map<GetUserDetailsDto>(databaseUser);
+        await SendOkAsync(userDto, ct);
+    }
+}

Knots/Endpoints/User/LoginEndpoint.cs

@@ -0,0 +1,40 @@
+using FastEndpoints;
+using Knots.DTO.User;
+using Knots.Services;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+public class LoginEndpoint(KnotsDbContext db, JwtService jwtService) : Endpoint<LoginUserDto, LoginResponseDto>
+{
+    public override void Configure()
+    {
+        Post("/users/login");
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(LoginUserDto req, CancellationToken ct)
+    {
+        Models.User? user = await db.Users
+            .SingleOrDefaultAsync(x => x.Username == req.Username, cancellationToken: ct);
+
+        if (user is null || !BCrypt.Net.BCrypt.Verify(req.Password, user.Password)) // hash à ajouter plus tard
+        {
+            await SendUnauthorizedAsync(ct);
+            return;
+        }
+
+        string token = jwtService.GenerateToken(user);
+
+        await SendOkAsync(new LoginResponseDto
+        {
+            Token = token,
+            Id = user.Id,
+            Username = user.Username!,
+            Email = user.Email,
+            Tel = user.Tel,
+            ProfilePicture = user.ProfilePicture,
+            Description = user.Description
+        }, ct);
+    }
+}

Knots/Endpoints/User/PatchUserContactEndpoint.cs

@@ -0,0 +1,47 @@
+using FastEndpoints;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+public class PatchUserContactEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<UpdateUserContactDto>
+{
+    public override void Configure()
+    {
+        Patch("/users/{@Id}/contact/", x => new {x.Id});
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(UpdateUserContactDto req, CancellationToken ct)
+    {
+        Models.User? databaseUser = await db.Users.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);
+
+        if (databaseUser is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        if (databaseUser.Email != req.Email)
+        {
+            databaseUser.Email = req.Email;
+        }
+        else
+        {
+            databaseUser.Email = databaseUser.Email;
+        }
+
+        if (databaseUser.Tel != req.Tel)
+        {
+            databaseUser.Tel = req.Tel;
+        }else
+        {
+            databaseUser.Tel = databaseUser.Tel;
+        }
+        
+        mapper.Map(req, databaseUser);
+
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/User/PatchUserDescriptionEndpoint.cs

@@ -0,0 +1,30 @@
+using FastEndpoints;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+public class PatchUserDescriptionEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<UpdateUserDescriptionDto>
+{
+    public override void Configure()
+    {
+        Patch("/users/{@Id}/description/");
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(UpdateUserDescriptionDto req, CancellationToken ct)
+    {
+        Models.User? databaseUser = await db.Users.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);
+
+        if (databaseUser is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        mapper.Map(req, databaseUser);
+
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/User/PatchUserPasswordEndpoint.cs

@@ -0,0 +1,30 @@
+using FastEndpoints;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+public class PatchUserPasswordEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<UpdateUserPasswordDto>
+{
+    public override void Configure()
+    {
+        Patch("/users/{@Id}/password/", x => new {x.Id});
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(UpdateUserPasswordDto req, CancellationToken ct)
+    {
+        Models.User? databaseUser = await db.Users.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);
+
+        if (databaseUser is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        mapper.Map(req, databaseUser);
+
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/User/PatchUserProfilePictureEndpoint.cs

@@ -0,0 +1,30 @@
+using FastEndpoints;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+public class PatchUserProfilePictureEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<UpdateUserProfilePictureDto>
+{
+    public override void Configure()
+    {
+        Patch("/users/{@Id}/profilepicture/");
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(UpdateUserProfilePictureDto req, CancellationToken ct)
+    {
+        Models.User? databaseUser = await db.Users.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);
+
+        if (databaseUser is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        mapper.Map(req, databaseUser);
+
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Endpoints/User/PatchUsernameEndpoint.cs

@@ -0,0 +1,41 @@
+using FastEndpoints;
+using Knots.DTO.User;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Endpoints.User;
+
+
+public class PatchUsernameEndpoint(KnotsDbContext db, AutoMapper.IMapper mapper) : Endpoint<UpdateUsernameDto>
+{
+    public override void Configure()
+    {
+        Patch("/users/{@Id}/username/");
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(UpdateUsernameDto req, CancellationToken ct)
+    {
+        Models.User? databaseUser = await db.Users.SingleOrDefaultAsync(x => x.Id == req.Id, cancellationToken: ct);
+
+        if (databaseUser is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+        
+        bool usernameExists = await db.Users
+            .AnyAsync(x => x.Username == req.Username && x.Id != req.Id, cancellationToken: ct);
+
+        if (usernameExists)
+        {
+            AddError(x => x.Username, "Ce nom d'utilisateur est déjà pris.");
+            await SendErrorsAsync(cancellation: ct);
+            return;
+        }
+        
+        mapper.Map(req, databaseUser);
+
+        await db.SaveChangesAsync(ct);
+        await SendNoContentAsync(ct);
+    }
+}

Knots/Hubs/ChatHub.cs

@@ -0,0 +1,60 @@
+using Knots.Services;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.SignalR;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots.Hubs;
+
+[Authorize]
+public class ChatHub(KnotsDbContext db, AutoMapper.IMapper mapper, EncryptionService encryption) : Hub
+{
+    // Rejoindre une conversation (room)
+    public async Task JoinConversation(string discussionId)
+    {
+        await Groups.AddToGroupAsync(Context.ConnectionId, discussionId);
+    }
+
+    // Quitter une conversation
+    public async Task LeaveConversation(string discussionId)
+    {
+        await Groups.RemoveFromGroupAsync(Context.ConnectionId, discussionId);
+    }
+
+    // Envoyer un message à une conversation
+    public async Task SendMessage(string discussionId, string content)
+    {
+        int id = int.Parse(discussionId);
+
+        Models.Discussion discussion = await db.Discussions
+            .Include(d => d.Key)
+            .SingleAsync(d => d.Id == id);
+
+        var message = new Models.Message
+        {
+            Contenu      = encryption.Encrypt(content, discussion.Key!.EnKey!), // chiffré en base
+            Date         = DateTime.UtcNow,
+            Type         = false,
+            UserId       = int.Parse(Context.UserIdentifier!),
+            DiscussionId = id
+        };
+
+        db.Messages.Add(message);
+        await db.SaveChangesAsync();
+
+        // diffusion en clair, avec les noms de champs attendus par le front
+        await Clients.Group(discussionId).SendAsync("ReceiveMessage", new
+        {
+            id      = message.Id,
+            contenu = content,
+            date    = message.Date,
+            userId  = message.UserId
+        });
+    }
+
+    // Notifier que l'utilisateur est en train d'écrire
+    public async Task Typing(string discussionId)
+    {
+        await Clients.OthersInGroup(discussionId)
+            .SendAsync("UserTyping", Context.UserIdentifier);
+    }
+}

Knots/Knots.csproj

@@ -1,19 +1,32 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
     <PropertyGroup>
-        <TargetFramework>net9.0</TargetFramework>
+        <TargetFramework>net8.0</TargetFramework>
         <Nullable>enable</Nullable>
         <ImplicitUsings>enable</ImplicitUsings>
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.8"/>
+        <PackageReference Include="AutoMapper" Version="16.1.1" />
+        <PackageReference Include="BCrypt.Net-Next" Version="4.2.0" />
+        <PackageReference Include="FastEndpoints" Version="5.33.0" />
+        <PackageReference Include="FastEndpoints.Swagger" Version="5.33.0" />
+        <PackageReference Include="Microsoft.AspNetCore.Authentication" Version="2.3.11" />
+        <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.28" />
+        <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.25" />
+        <PackageReference Include="Microsoft.AspNetCore.SignalR" Version="1.2.11" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.25" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.25">
+          <PrivateAssets>all</PrivateAssets>
+          <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+        <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.25" />
+        <PackageReference Include="Swashbuckle.AspNetCore" Version="10.1.7" />
     </ItemGroup>
 
     <ItemGroup>
-      <Folder Include="DTO\" />
       <Folder Include="Endpoints\" />
-      <Folder Include="Validators\" />
+      <Folder Include="Migrations\" />
     </ItemGroup>
 
 </Project>

Knots/KnotsDbContext.cs

@@ -0,0 +1,79 @@
+using Knots.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace Knots;
+
+public class KnotsDbContext : DbContext
+{
+    public DbSet<User> Users => Set<User>();
+    public DbSet<Discussion> Discussions => Set<Discussion>();
+    public DbSet<Group> Groups => Set<Group>();
+    public DbSet<Message> Messages => Set<Message>();
+    public DbSet<Role> Roles => Set<Role>();
+    public DbSet<Key> Keys => Set<Key>();
+    public DbSet<UserDiscussion> UserDiscussions => Set<UserDiscussion>();
+    public DbSet<GroupUser> GroupUsers => Set<GroupUser>();
+
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        //Infos de connexion à la base de données
+        string connectionString =
+            "Server=romaric-thibault.fr;" +
+            "Database=knots;" +
+            "User Id=knots;" +
+            "Password=knots;" +
+            "TrustServerCertificate=true;";
+
+        optionsBuilder.UseSqlServer(connectionString);
+    }
+
+protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<GroupUser>()
+            .HasKey(gu => new { gu.GroupId, gu.UserId });
+
+        modelBuilder.Entity<GroupUser>()
+            .HasOne(gu => gu.Group)
+            .WithMany(g => g.GroupUsers)
+            .HasForeignKey(gu => gu.GroupId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        modelBuilder.Entity<GroupUser>()
+            .HasOne(gu => gu.User)
+            .WithMany()
+            .HasForeignKey(gu => gu.UserId)
+            .OnDelete(DeleteBehavior.Restrict);
+
+        modelBuilder.Entity<GroupUser>()
+            .HasOne(gu => gu.Role)
+            .WithMany(r => r.GroupUsers)
+            .HasForeignKey(gu => gu.RoleId);
+        
+        modelBuilder.Entity<Discussion>()
+            .HasOne(d => d.Group)
+            .WithMany()
+            .HasForeignKey(d => d.GroupId)
+            .OnDelete(DeleteBehavior.Restrict);
+        
+        modelBuilder.Entity<Group>()
+            .HasOne(g => g.Discussion)
+            .WithMany()
+            .HasForeignKey(g => g.DiscussionId)
+            .OnDelete(DeleteBehavior.Restrict);
+        
+        modelBuilder.Entity<UserDiscussion>()
+            .HasKey(ud => new { ud.UserId, ud.DiscussionId });
+
+        modelBuilder.Entity<UserDiscussion>()
+            .HasOne(ud => ud.Discussion)
+            .WithMany(d => d.UserDiscussions)
+            .HasForeignKey(ud => ud.DiscussionId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        modelBuilder.Entity<UserDiscussion>()
+            .HasOne(ud => ud.User)
+            .WithMany(u => u.UserDiscussions)
+            .HasForeignKey(ud => ud.UserId)
+            .OnDelete(DeleteBehavior.Restrict);
+    }
+}

Knots/Migrations/20260505083044_InitialDatabase.Designer.cs

@@ -0,0 +1,232 @@
+// <auto-generated />
+using System;
+using Knots;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Knots.Migrations
+{
+    [DbContext(typeof(KnotsDbContext))]
+    [Migration("20260505083044_InitialDatabase")]
+    partial class InitialDatabase
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.25")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("KeyId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Discussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("KeyId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("MembersAmount")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Groups");
+                });
+
+            modelBuilder.Entity("Knots.Models.Key", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("EnKey")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Keys");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Contenu")
+                        .IsRequired()
+                        .HasMaxLength(1000)
+                        .HasColumnType("nvarchar(1000)");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int?>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("KeyId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("Type")
+                        .HasColumnType("bit");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("KeyId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.Role", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Libelle")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Roles");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasMaxLength(70)
+                        .HasColumnType("nvarchar(70)");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Tel")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", null)
+                        .WithMany("Messages")
+                        .HasForeignKey("DiscussionId");
+
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.Key", "Key")
+                        .WithMany()
+                        .HasForeignKey("KeyId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany("Messages")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Key");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Navigation("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Navigation("Messages");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Knots/Migrations/20260505083044_InitialDatabase.cs

@@ -0,0 +1,172 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Knots.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitialDatabase : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Discussions",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    KeyId = table.Column<int>(type: "int", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Discussions", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Groups",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    Name = table.Column<string>(type: "nvarchar(50)", maxLength: 50, nullable: false),
+                    MembersAmount = table.Column<int>(type: "int", nullable: false),
+                    ProfilePicture = table.Column<string>(type: "nvarchar(max)", nullable: true),
+                    KeyId = table.Column<int>(type: "int", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Groups", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Keys",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    EnKey = table.Column<string>(type: "nvarchar(50)", maxLength: 50, nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Keys", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Roles",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    Libelle = table.Column<string>(type: "nvarchar(50)", maxLength: 50, nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Roles", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Users",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    Username = table.Column<string>(type: "nvarchar(50)", maxLength: 50, nullable: false),
+                    Description = table.Column<string>(type: "nvarchar(200)", maxLength: 200, nullable: true),
+                    Password = table.Column<string>(type: "nvarchar(max)", nullable: false),
+                    Email = table.Column<string>(type: "nvarchar(70)", maxLength: 70, nullable: false),
+                    Tel = table.Column<string>(type: "nvarchar(max)", nullable: false),
+                    ProfilePicture = table.Column<string>(type: "nvarchar(max)", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Users", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Messages",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    Contenu = table.Column<string>(type: "nvarchar(1000)", maxLength: 1000, nullable: false),
+                    Date = table.Column<DateTime>(type: "datetime2", nullable: false),
+                    Type = table.Column<bool>(type: "bit", nullable: false),
+                    GroupId = table.Column<int>(type: "int", nullable: false),
+                    KeyId = table.Column<int>(type: "int", nullable: false),
+                    UserId = table.Column<int>(type: "int", nullable: false),
+                    DiscussionId = table.Column<int>(type: "int", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Messages", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Messages_Discussions_DiscussionId",
+                        column: x => x.DiscussionId,
+                        principalTable: "Discussions",
+                        principalColumn: "Id");
+                    table.ForeignKey(
+                        name: "FK_Messages_Groups_GroupId",
+                        column: x => x.GroupId,
+                        principalTable: "Groups",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Messages_Keys_KeyId",
+                        column: x => x.KeyId,
+                        principalTable: "Keys",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Messages_Users_UserId",
+                        column: x => x.UserId,
+                        principalTable: "Users",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Messages_DiscussionId",
+                table: "Messages",
+                column: "DiscussionId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Messages_GroupId",
+                table: "Messages",
+                column: "GroupId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Messages_KeyId",
+                table: "Messages",
+                column: "KeyId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Messages_UserId",
+                table: "Messages",
+                column: "UserId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Messages");
+
+            migrationBuilder.DropTable(
+                name: "Roles");
+
+            migrationBuilder.DropTable(
+                name: "Discussions");
+
+            migrationBuilder.DropTable(
+                name: "Groups");
+
+            migrationBuilder.DropTable(
+                name: "Keys");
+
+            migrationBuilder.DropTable(
+                name: "Users");
+        }
+    }
+}

Knots/Migrations/20260610135459_AddRoleIdToUser.Designer.cs

@@ -0,0 +1,316 @@
+// <auto-generated />
+using System;
+using Knots;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Knots.Migrations
+{
+    [DbContext(typeof(KnotsDbContext))]
+    [Migration("20260610135459_AddRoleIdToUser")]
+    partial class AddRoleIdToUser
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.25")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2");
+
+                    b.Property<bool>("IsGroup")
+                        .HasColumnType("bit");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Discussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("KeyId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("MembersAmount")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DiscussionId")
+                        .IsUnique();
+
+                    b.ToTable("Groups");
+                });
+
+            modelBuilder.Entity("Knots.Models.Key", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("EnKey")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Keys");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Contenu")
+                        .IsRequired()
+                        .HasMaxLength(1000)
+                        .HasColumnType("nvarchar(1000)");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("KeyId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("Type")
+                        .HasColumnType("bit");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("KeyId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.Role", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Libelle")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Roles");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasMaxLength(70)
+                        .HasColumnType("nvarchar(70)");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int?>("RoleId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Tel")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("Knots.Models.UserDiscussion", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.HasKey("UserId", "DiscussionId");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.ToTable("UserDiscussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithOne("Group")
+                        .HasForeignKey("Knots.Models.Group", "DiscussionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany("Messages")
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId");
+
+                    b.HasOne("Knots.Models.Key", "Key")
+                        .WithMany("Messages")
+                        .HasForeignKey("KeyId");
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany("Messages")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Key");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.HasOne("Knots.Models.Role", "Role")
+                        .WithMany("Users")
+                        .HasForeignKey("RoleId");
+
+                    b.Navigation("Role");
+                });
+
+            modelBuilder.Entity("Knots.Models.UserDiscussion", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany("UserDiscussions")
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany("UserDiscussions")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Navigation("Group");
+
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserDiscussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Key", b =>
+                {
+                    b.Navigation("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.Role", b =>
+                {
+                    b.Navigation("Users");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserDiscussions");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Knots/Migrations/20260610135459_AddRoleIdToUser.cs

@@ -0,0 +1,270 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Knots.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddRoleIdToUser : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Messages_Discussions_DiscussionId",
+                table: "Messages");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Messages_Groups_GroupId",
+                table: "Messages");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Messages_Keys_KeyId",
+                table: "Messages");
+
+            migrationBuilder.DropColumn(
+                name: "KeyId",
+                table: "Discussions");
+
+            migrationBuilder.AddColumn<int>(
+                name: "RoleId",
+                table: "Users",
+                type: "int",
+                nullable: true);
+
+            migrationBuilder.AlterColumn<int>(
+                name: "KeyId",
+                table: "Messages",
+                type: "int",
+                nullable: true,
+                oldClrType: typeof(int),
+                oldType: "int");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "GroupId",
+                table: "Messages",
+                type: "int",
+                nullable: true,
+                oldClrType: typeof(int),
+                oldType: "int");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "DiscussionId",
+                table: "Messages",
+                type: "int",
+                nullable: false,
+                defaultValue: 0,
+                oldClrType: typeof(int),
+                oldType: "int",
+                oldNullable: true);
+
+            migrationBuilder.AddColumn<int>(
+                name: "DiscussionId",
+                table: "Groups",
+                type: "int",
+                nullable: false,
+                defaultValue: 0);
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "CreatedAt",
+                table: "Discussions",
+                type: "datetime2",
+                nullable: false,
+                defaultValue: new DateTime(1, 1, 1, 0, 0, 0, 0, DateTimeKind.Unspecified));
+
+            migrationBuilder.AddColumn<bool>(
+                name: "IsGroup",
+                table: "Discussions",
+                type: "bit",
+                nullable: false,
+                defaultValue: false);
+
+            migrationBuilder.CreateTable(
+                name: "UserDiscussions",
+                columns: table => new
+                {
+                    UserId = table.Column<int>(type: "int", nullable: false),
+                    DiscussionId = table.Column<int>(type: "int", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_UserDiscussions", x => new { x.UserId, x.DiscussionId });
+                    table.ForeignKey(
+                        name: "FK_UserDiscussions_Discussions_DiscussionId",
+                        column: x => x.DiscussionId,
+                        principalTable: "Discussions",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_UserDiscussions_Users_UserId",
+                        column: x => x.UserId,
+                        principalTable: "Users",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Users_RoleId",
+                table: "Users",
+                column: "RoleId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Groups_DiscussionId",
+                table: "Groups",
+                column: "DiscussionId",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_UserDiscussions_DiscussionId",
+                table: "UserDiscussions",
+                column: "DiscussionId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Groups_Discussions_DiscussionId",
+                table: "Groups",
+                column: "DiscussionId",
+                principalTable: "Discussions",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Messages_Discussions_DiscussionId",
+                table: "Messages",
+                column: "DiscussionId",
+                principalTable: "Discussions",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Messages_Groups_GroupId",
+                table: "Messages",
+                column: "GroupId",
+                principalTable: "Groups",
+                principalColumn: "Id");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Messages_Keys_KeyId",
+                table: "Messages",
+                column: "KeyId",
+                principalTable: "Keys",
+                principalColumn: "Id");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Users_Roles_RoleId",
+                table: "Users",
+                column: "RoleId",
+                principalTable: "Roles",
+                principalColumn: "Id");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Groups_Discussions_DiscussionId",
+                table: "Groups");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Messages_Discussions_DiscussionId",
+                table: "Messages");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Messages_Groups_GroupId",
+                table: "Messages");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Messages_Keys_KeyId",
+                table: "Messages");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Users_Roles_RoleId",
+                table: "Users");
+
+            migrationBuilder.DropTable(
+                name: "UserDiscussions");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Users_RoleId",
+                table: "Users");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Groups_DiscussionId",
+                table: "Groups");
+
+            migrationBuilder.DropColumn(
+                name: "RoleId",
+                table: "Users");
+
+            migrationBuilder.DropColumn(
+                name: "DiscussionId",
+                table: "Groups");
+
+            migrationBuilder.DropColumn(
+                name: "CreatedAt",
+                table: "Discussions");
+
+            migrationBuilder.DropColumn(
+                name: "IsGroup",
+                table: "Discussions");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "KeyId",
+                table: "Messages",
+                type: "int",
+                nullable: false,
+                defaultValue: 0,
+                oldClrType: typeof(int),
+                oldType: "int",
+                oldNullable: true);
+
+            migrationBuilder.AlterColumn<int>(
+                name: "GroupId",
+                table: "Messages",
+                type: "int",
+                nullable: false,
+                defaultValue: 0,
+                oldClrType: typeof(int),
+                oldType: "int",
+                oldNullable: true);
+
+            migrationBuilder.AlterColumn<int>(
+                name: "DiscussionId",
+                table: "Messages",
+                type: "int",
+                nullable: true,
+                oldClrType: typeof(int),
+                oldType: "int");
+
+            migrationBuilder.AddColumn<int>(
+                name: "KeyId",
+                table: "Discussions",
+                type: "int",
+                nullable: false,
+                defaultValue: 0);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Messages_Discussions_DiscussionId",
+                table: "Messages",
+                column: "DiscussionId",
+                principalTable: "Discussions",
+                principalColumn: "Id");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Messages_Groups_GroupId",
+                table: "Messages",
+                column: "GroupId",
+                principalTable: "Groups",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Messages_Keys_KeyId",
+                table: "Messages",
+                column: "KeyId",
+                principalTable: "Keys",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+    }
+}

Knots/Migrations/20260610224937_FixGroupDiscussion.Designer.cs

@@ -0,0 +1,380 @@
+// <auto-generated />
+using System;
+using Knots;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Knots.Migrations
+{
+    [DbContext(typeof(KnotsDbContext))]
+    [Migration("20260610224937_FixGroupDiscussion")]
+    partial class FixGroupDiscussion
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.25")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int?>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsGroup")
+                        .HasColumnType("bit");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("GroupId");
+
+                    b.ToTable("Discussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("MembersAmount")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.ToTable("Groups");
+                });
+
+            modelBuilder.Entity("Knots.Models.GroupUser", b =>
+                {
+                    b.Property<int>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("RoleId")
+                        .HasColumnType("int");
+
+                    b.HasKey("GroupId", "UserId");
+
+                    b.HasIndex("RoleId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("GroupUsers");
+                });
+
+            modelBuilder.Entity("Knots.Models.Key", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("EnKey")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Keys");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("AuthorId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Contenu")
+                        .IsRequired()
+                        .HasMaxLength(1000)
+                        .HasColumnType("nvarchar(1000)");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("KeyId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("Type")
+                        .HasColumnType("bit");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("KeyId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.Role", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Libelle")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Roles");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasMaxLength(70)
+                        .HasColumnType("nvarchar(70)");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int?>("RoleId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Tel")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("Knots.Models.UserDiscussion", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.HasKey("UserId", "DiscussionId");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.ToTable("UserDiscussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Restrict);
+
+                    b.Navigation("Group");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany()
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+                });
+
+            modelBuilder.Entity("Knots.Models.GroupUser", b =>
+                {
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany("GroupUsers")
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.Role", "Role")
+                        .WithMany("GroupUsers")
+                        .HasForeignKey("RoleId");
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Role");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany("Messages")
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId");
+
+                    b.HasOne("Knots.Models.Key", "Key")
+                        .WithMany("Messages")
+                        .HasForeignKey("KeyId");
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany("Messages")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Key");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.HasOne("Knots.Models.Role", "Role")
+                        .WithMany("Users")
+                        .HasForeignKey("RoleId");
+
+                    b.Navigation("Role");
+                });
+
+            modelBuilder.Entity("Knots.Models.UserDiscussion", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany("UserDiscussions")
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany("UserDiscussions")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserDiscussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.Navigation("GroupUsers");
+                });
+
+            modelBuilder.Entity("Knots.Models.Key", b =>
+                {
+                    b.Navigation("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.Role", b =>
+                {
+                    b.Navigation("GroupUsers");
+
+                    b.Navigation("Users");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserDiscussions");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Knots/Migrations/20260610224937_FixGroupDiscussion.cs

@@ -0,0 +1,21 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Knots.Migrations
+{
+    /// <inheritdoc />
+    public partial class FixGroupDiscussion : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "AuthorId",
+                table: "Messages",
+                type: "int",
+                nullable: false,
+                defaultValue: 0);
+        }
+        
+    }
+}

Knots/Migrations/KnotsDbContextModelSnapshot.cs

@@ -0,0 +1,377 @@
+// <auto-generated />
+using System;
+using Knots;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Knots.Migrations
+{
+    [DbContext(typeof(KnotsDbContext))]
+    partial class KnotsDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.25")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int?>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsGroup")
+                        .HasColumnType("bit");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("GroupId");
+
+                    b.ToTable("Discussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("MembersAmount")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.ToTable("Groups");
+                });
+
+            modelBuilder.Entity("Knots.Models.GroupUser", b =>
+                {
+                    b.Property<int>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("RoleId")
+                        .HasColumnType("int");
+
+                    b.HasKey("GroupId", "UserId");
+
+                    b.HasIndex("RoleId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("GroupUsers");
+                });
+
+            modelBuilder.Entity("Knots.Models.Key", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("EnKey")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Keys");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("AuthorId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Contenu")
+                        .IsRequired()
+                        .HasMaxLength(1000)
+                        .HasColumnType("nvarchar(1000)");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("KeyId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("Type")
+                        .HasColumnType("bit");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("KeyId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.Role", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Libelle")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Roles");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasMaxLength(70)
+                        .HasColumnType("nvarchar(70)");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int?>("RoleId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Tel")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("Knots.Models.UserDiscussion", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.HasKey("UserId", "DiscussionId");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.ToTable("UserDiscussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Restrict);
+
+                    b.Navigation("Group");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany()
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+                });
+
+            modelBuilder.Entity("Knots.Models.GroupUser", b =>
+                {
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany("GroupUsers")
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.Role", "Role")
+                        .WithMany("GroupUsers")
+                        .HasForeignKey("RoleId");
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Role");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany("Messages")
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId");
+
+                    b.HasOne("Knots.Models.Key", "Key")
+                        .WithMany("Messages")
+                        .HasForeignKey("KeyId");
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany("Messages")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Key");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.HasOne("Knots.Models.Role", "Role")
+                        .WithMany("Users")
+                        .HasForeignKey("RoleId");
+
+                    b.Navigation("Role");
+                });
+
+            modelBuilder.Entity("Knots.Models.UserDiscussion", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany("UserDiscussions")
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany("UserDiscussions")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserDiscussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.Navigation("GroupUsers");
+                });
+
+            modelBuilder.Entity("Knots.Models.Key", b =>
+                {
+                    b.Navigation("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.Role", b =>
+                {
+                    b.Navigation("GroupUsers");
+
+                    b.Navigation("Users");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserDiscussions");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Knots/Models/Discussion.cs

@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Knots.Models;
+
+public class Discussion
+{
+    [Key] public int Id { get; set; }
+    public bool IsGroup { get; set; } = false;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    public int? GroupId { get; set; }
+    public Group? Group { get; set; }
+
+    public int? KeyId { get; set; }
+    public Key? Key { get; set; }
+    
+    public List<Message> Messages { get; set; } = [];
+    public List<UserDiscussion> UserDiscussions { get; set; } = [];
+}

Knots/Models/Group.cs

@@ -0,0 +1,16 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Knots.Models;
+
+public class Group
+{
+    [Key] public int Id { get; set; }
+    [Required, MaxLength(50)] public string? Name { get; set; }
+    [Required] public int MembersAmount { get; set; }
+    public string? ProfilePicture { get; set; }
+
+    public List<GroupUser> GroupUsers { get; set; } = [];
+
+    public int DiscussionId { get; set; }
+    public Discussion Discussion { get; set; } = null!;
+}

Knots/Models/GroupUser.cs

@@ -0,0 +1,13 @@
+namespace Knots.Models;
+
+public class GroupUser
+{
+    public int GroupId { get; set; }
+    public Group Group { get; set; } = null!;
+
+    public int UserId { get; set; }
+    public User User { get; set; } = null!;
+
+    public int? RoleId { get; set; }  
+    public Role? Role { get; set; }
+}

Knots/Models/Key.cs

@@ -0,0 +1,9 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Knots.Models;
+
+public class Key
+{
+    [Key] public int Id { get; set; }
+    [Required, MaxLength(50)] public string? EnKey { get; set; }
+}

Knots/Models/Message.cs

@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Knots.Models;
+
+public class Message
+{
+    [Key] public int Id { get; set; }
+    [Required, MaxLength(1000)] public string? Contenu { get; set; }
+    [Required] public DateTime Date { get; set; }
+    [Required] public Boolean Type { get; set; }
+    
+    public int UserId { get; set; }       
+    public User User { get; set; } = null!;
+    
+    public int DiscussionId { get; set; }  
+    public Discussion Discussion { get; set; } = null!;
+    
+    public Group? Group { get; set; }
+}

Knots/Models/Role.cs

@@ -0,0 +1,11 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Knots.Models;
+
+public class Role
+{
+    public int Id { get; set; }
+    [Required, MaxLength(50)] public string? Libelle { get; set; }
+    public List<User> Users { get; set; } = [];
+    public List<GroupUser> GroupUsers { get; set; } = [];
+}

Knots/Models/User.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Knots.Models;
+
+public class User
+{
+      public int Id { get; set; }
+      [Required, MaxLength(50)] public string? Username { get; set; }
+      [MaxLength(200)] public string? Description { get; set; }
+      [Required, Length(12, 50)] public string? Password { get; set; }
+      [Required, MaxLength(70)] public string? Email { get; set; }
+      [Required, Length(10, 10)] public string? Tel { get; set; }
+      public string? ProfilePicture { get; set; }
+      public List<Message> Messages { get; set; } = [];
+      public int? RoleId { get; set; }
+      public Role? Role { get; set; }
+      public List<UserDiscussion> UserDiscussions { get; set; } = [];
+}

Knots/Models/UserDiscussion.cs

@@ -0,0 +1,10 @@
+namespace Knots.Models;
+
+public class UserDiscussion
+{
+    public int UserId { get; set; }
+    public User User { get; set; } = null!;
+
+    public int DiscussionId { get; set; }
+    public Discussion Discussion { get; set; } = null!;
+}

Knots/Profiles/DiscussionProfile.cs

@@ -0,0 +1,17 @@
+using AutoMapper;
+using Knots.DTO.Discussion;
+using Knots.Models;
+
+namespace Knots.Profiles;
+
+public class DiscussionProfile : Profile
+{
+    public DiscussionProfile()
+    {
+        CreateMap<Discussion, GetDiscussionDto>();
+        CreateMap<Discussion, CreateDiscussionDto>();
+        
+        CreateMap<CreateDiscussionDto, Discussion>();
+        
+    }
+}

Knots/Profiles/GroupProfile.cs

@@ -0,0 +1,15 @@
+using AutoMapper;
+using Knots.DTO.Group;
+using Knots.Models;
+
+namespace Knots.Profiles;
+
+public class GroupProfile : Profile
+{
+    public GroupProfile()
+    {
+        CreateMap<Group, GetGroupDto>();
+        CreateMap<Group, GetGroupDetailsDto>();
+        CreateMap<CreateGroupDto, Group>();
+    }
+}

Knots/Profiles/KeyProfile.cs

@@ -0,0 +1,16 @@
+using AutoMapper;
+using Knots.DTO.Discussion;
+using Knots.DTO.Key;
+using Knots.Models;
+
+namespace Knots.Profiles;
+
+public class KeyProfile : Profile
+{
+    public KeyProfile()
+    {
+        CreateMap<Key, GetKeyDetailsDto>();
+        CreateMap<Key, CreateKeyDto>();
+        CreateMap<CreateKeyDto, Key>();
+    }
+}

Knots/Profiles/MessageProfile.cs

@@ -0,0 +1,16 @@
+using AutoMapper;
+using Knots.DTO.Discussion;
+using Knots.DTO.Message;
+using Knots.Models;
+
+namespace Knots.Profiles;
+
+public class MessageProfile : Profile
+{
+    public MessageProfile()
+    {
+        CreateMap<Message, GetMessageDetailsDto>();
+        CreateMap<Message, CreateMessageDto>();
+        CreateMap<CreateMessageDto, Message>();
+    }
+}

Knots/Profiles/RoleProfile.cs

@@ -0,0 +1,16 @@
+using AutoMapper;
+using Knots.DTO.Discussion;
+using Knots.DTO.Role;
+using Knots.Models;
+
+namespace Knots.Profiles;
+
+public class RoleProfile : Profile
+{
+    public RoleProfile()
+    {
+        CreateMap<Role, GetRoleDto>();
+        CreateMap<Role, CreateRoleDto>();
+        CreateMap<CreateRoleDto, Role>();
+    }
+}

Knots/Profiles/UserProfile.cs

@@ -0,0 +1,29 @@
+using AutoMapper;
+using Knots.DTO.Discussion;
+using Knots.DTO.User;
+using Knots.Models;
+
+namespace Knots.Profiles;
+
+public class UserProfile : Profile
+{
+    public UserProfile()
+    {
+        CreateMap<User, GetUserDetailsDto>();
+        CreateMap<User, GetUserDto>();
+        CreateMap<CreateUserDto, User>();
+        CreateMap<UpdateUserDto, User>();
+        CreateMap<UpdateUserContactDto, User>();
+        CreateMap<UpdateUserDescriptionDto, User>();
+        CreateMap<UpdateUsernameDto, User>();
+        CreateMap<UpdateUserProfilePictureDto, User>();
+        CreateMap<UpdateUserPasswordDto, User>();
+        
+        CreateMap<User, UpdateUserContactDto>();
+        CreateMap<User, UpdateUserDto>();
+        CreateMap<User, UpdateUserDescriptionDto>();
+        CreateMap<User, UpdateUserProfilePictureDto>();
+        CreateMap<User, UpdateUserPasswordDto>();
+        CreateMap<User, CreateUserDto>();
+    }
+}

Knots/Program.cs

@@ -1,23 +1,96 @@
-var builder = WebApplication.CreateBuilder(args);
+using System.Text;
+using Knots;
+using FastEndpoints;
+using FastEndpoints.Swagger;
+using Knots.Hubs;
+using Knots.Services;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
+using Microsoft.AspNetCore.Http.Json;
+using Microsoft.IdentityModel.Tokens;
+using Microsoft.OpenApi;
 
-// Add services to the container.
+WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
 
-builder.Services.AddControllers();
-// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
-builder.Services.AddOpenApi();
+// On ajoute ici la configuration de la base de données
+builder.Services.AddDbContext<KnotsDbContext>();
 
-var app = builder.Build();
+//On ajoute le CORS au code
+builder.Services.AddCors(options =>
+{ options.AddDefaultPolicy(policyBuilder =>
+    {
+        policyBuilder
+            .WithOrigins("http://localhost:5250", "http://localhost:4200")
+            .WithMethods("GET", "POST", "PUT", "PATCH", "DELETE")
+            .AllowAnyHeader()
+            .AllowCredentials();
+    });
+});
 
-// Configure the HTTP request pipeline.
-if (app.Environment.IsDevelopment())
+builder.Services.AddFastEndpoints(o =>
 {
-    app.MapOpenApi();
-}
+    o.DisableAutoDiscovery = false;
+});
+
+builder.Services.SwaggerDocument();
+
+builder.Services.AddScoped<JwtService>();
+
+builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
+    .AddJwtBearer(options =>
+    {
+        options.TokenValidationParameters = new TokenValidationParameters
+        {
+            ValidateIssuer = true,
+            ValidateAudience = true,
+            ValidateLifetime = true,
+            ValidateIssuerSigningKey = true,
+            ValidIssuer = builder.Configuration["Jwt:Issuer"],
+            ValidAudience = builder.Configuration["Jwt:Audience"],
+            IssuerSigningKey = new SymmetricSecurityKey(
+                Encoding.UTF8.GetBytes(builder.Configuration["Jwt:Key"]!))
+            
+        };
+        
+        options.Events = new JwtBearerEvents
+        {
+            OnMessageReceived = context =>
+            {
+                var accessToken = context.Request.Query["access_token"];
+                var path = context.HttpContext.Request.Path;
+                if (!string.IsNullOrEmpty(accessToken) &&
+                    path.StartsWithSegments("/hubs"))
+                {
+                    context.Token = accessToken;
+                }
+                return Task.CompletedTask;
+            }
+        };
+        
+    });
+builder.Services.AddAuthorization();
+
+builder.Services.AddSignalR();
+
+builder.Services.AddAutoMapper(cfg => { }, typeof(Program).Assembly);
+
+builder.Services.AddSingleton<EncryptionService>();
+
+// On construit l'application en lui donnant vie
+WebApplication app = builder.Build();
+
+app.UseCors();
 
 app.UseHttpsRedirection();
 
-app.UseAuthorization();
+app.UseAuthentication()
+    .UseAuthorization()
+    .UseFastEndpoints(options => 
+        { 
+            options.Endpoints.RoutePrefix = "API";
+            options.Endpoints.ShortNames = true;
+        }
+    ).UseSwaggerGen();
 
-app.MapControllers();
+app.MapHub<ChatHub>("hubs/chat");
 
 app.Run();

Knots/Services/EncryptionService.cs

@@ -0,0 +1,56 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Knots.Services;
+
+public class EncryptionService
+{
+    private const int NonceSize = 12; // AesGcm.NonceByteSizes.MaxSize
+    private const int TagSize = 16;   // AesGcm.TagByteSizes.MaxSize
+
+    // Génère une clé AES-256 (32 octets) encodée en Base64
+    public string GenerateKey()
+        => Convert.ToBase64String(RandomNumberGenerator.GetBytes(32));
+
+    // Chiffre → renvoie Base64(nonce + tag + ciphertext)
+    public string Encrypt(string plainText, string base64Key)
+    {
+        byte[] key = Convert.FromBase64String(base64Key);
+        byte[] plain = Encoding.UTF8.GetBytes(plainText);
+
+        byte[] nonce = RandomNumberGenerator.GetBytes(NonceSize);
+        byte[] cipher = new byte[plain.Length];
+        byte[] tag = new byte[TagSize];
+
+        using AesGcm aes = new(key, TagSize);
+        aes.Encrypt(nonce, plain, cipher, tag);
+
+        byte[] result = new byte[NonceSize + TagSize + cipher.Length];
+        Buffer.BlockCopy(nonce, 0, result, 0, NonceSize);
+        Buffer.BlockCopy(tag, 0, result, NonceSize, TagSize);
+        Buffer.BlockCopy(cipher, 0, result, NonceSize + TagSize, cipher.Length);
+
+        return Convert.ToBase64String(result);
+    }
+
+    // Déchiffre Base64(nonce + tag + ciphertext)
+    public string Decrypt(string base64Cipher, string base64Key)
+    {
+        byte[] key = Convert.FromBase64String(base64Key);
+        byte[] data = Convert.FromBase64String(base64Cipher);
+
+        byte[] nonce = new byte[NonceSize];
+        byte[] tag = new byte[TagSize];
+        byte[] cipher = new byte[data.Length - NonceSize - TagSize];
+
+        Buffer.BlockCopy(data, 0, nonce, 0, NonceSize);
+        Buffer.BlockCopy(data, NonceSize, tag, 0, TagSize);
+        Buffer.BlockCopy(data, NonceSize + TagSize, cipher, 0, cipher.Length);
+
+        byte[] plain = new byte[cipher.Length];
+        using AesGcm aes = new(key, TagSize);
+        aes.Decrypt(nonce, cipher, tag, plain);
+
+        return Encoding.UTF8.GetString(plain);
+    }
+}

Knots/Services/JwtService.cs

@@ -0,0 +1,31 @@
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Text;
+using Microsoft.IdentityModel.Tokens;
+
+namespace Knots.Services;
+
+public class JwtService(IConfiguration configuration)
+{
+    public string GenerateToken(Models.User user)
+    {
+        List<Claim> claims =
+        [
+            new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()),
+            new Claim(ClaimTypes.Name, user.Username!)
+        ];
+
+        SymmetricSecurityKey key = new(Encoding.UTF8.GetBytes(configuration["Jwt:Key"]!));
+        SigningCredentials creds = new(key, SecurityAlgorithms.HmacSha256);
+
+        JwtSecurityToken token = new(
+            issuer: configuration["Jwt:Issuer"],
+            audience: configuration["Jwt:Audience"],
+            claims: claims,
+            expires: DateTime.UtcNow.AddDays(7),
+            signingCredentials: creds
+        );
+
+        return new JwtSecurityTokenHandler().WriteToken(token);
+    }
+}

Knots/Validators/Discussion/CreateDiscussionDtoValidator.cs

@@ -0,0 +1,15 @@
+using FastEndpoints;
+using FluentValidation;
+using Knots.DTO.Discussion;
+
+namespace Knots.Validators.Discussion;
+
+public class CreateDiscussionDtoValidator : Validator<CreateDiscussionDto>
+{
+    public CreateDiscussionDtoValidator()
+    {
+        RuleFor(x => x.Id)
+            .NotEmpty()
+            .WithMessage("Id is required");
+    }
+}

Knots/Validators/Discussion/DeleteDiscussionDtoValidator.cs

@@ -0,0 +1,15 @@
+using FastEndpoints;
+using FluentValidation;
+using Knots.DTO.Discussion;
+
+namespace Knots.Validators.Discussion;
+
+public class DeleteDiscussionDtoValidator : Validator<DeleteDiscussionDto>
+{
+    public DeleteDiscussionDtoValidator()
+    {
+        RuleFor(x => x.Id)
+            .NotEmpty()
+            .WithMessage("Id is required");
+    }
+}

Knots/Validators/Group/CreateGroupDtoValidator.cs

@@ -0,0 +1,21 @@
+using FastEndpoints;
+using FluentValidation;
+using Knots.DTO.Group;
+
+namespace Knots.Validators.Group;
+
+public class CreateGroupDtoValidator : Validator<CreateGroupDto>
+{
+    public CreateGroupDtoValidator()
+    {
+        RuleFor(x => x.Nom)
+            .NotEmpty()
+            .WithMessage("You must enter a name for the group")
+            .MaximumLength(50)
+            .WithMessage("Maximum 50 character are required");
+
+        RuleFor(x => x.NombreMembres)
+            .NotEmpty()
+            .WithMessage("Members cannot be empty");
+    }
+}

Knots/Validators/Group/DeleteGroupDtoValidator.cs

@@ -0,0 +1,17 @@
+using FastEndpoints;
+using FluentValidation;
+using Knots.DTO.Group;
+
+namespace Knots.Validators.Group;
+
+public class DeleteGroupDtoValidator : Validator<DeleteGroupDto>
+{
+    public  DeleteGroupDtoValidator()
+    {
+        RuleFor(x => x.Id)
+            .NotEmpty()
+            .WithMessage("Id is required")
+            .GreaterThan(0)
+            .WithMessage("Id cannot be less than zero");
+    }
+}