Initial commit

MetaCourse.Api/Entities/Course.cs

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+namespace MetaCourse.Api.Entities;
+
+public enum CourseStatus { Draft, Published }
+
+public class Course
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public string Title { get; set; } = string.Empty;
+    public string Description { get; set; } = string.Empty;
+    public CourseStatus Status { get; set; } = CourseStatus.Draft;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+
+    public Guid CreatorId { get; set; }
+    public User Creator { get; set; } = null!;
+
+    public ICollection<Topic> Topics { get; set; } = new List<Topic>();
+    public ICollection<UserCourse> UserCourses { get; set; } = new List<UserCourse>();
+}

MetaCourse.Api/Entities/Resource.cs

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+namespace MetaCourse.Api.Entities;
+
+public enum ResourceType { Url, Video, Text, File }
+
+public class Resource
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public ResourceType Type { get; set; }
+    public string Title { get; set; } = string.Empty;
+    public string Content { get; set; } = string.Empty;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    public ICollection<TopicResource> TopicResources { get; set; } = new List<TopicResource>();
+    public ICollection<UserResourceProgress> UserProgresses { get; set; } = new List<UserResourceProgress>();
+}

MetaCourse.Api/Entities/Topic.cs

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+namespace MetaCourse.Api.Entities;
+
+public class Topic
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public string Title { get; set; } = string.Empty;
+    public string? Description { get; set; }
+    public int Position { get; set; }
+
+    public Guid CourseId { get; set; }
+    public Course Course { get; set; } = null!;
+
+    public ICollection<TopicResource> TopicResources { get; set; } = new List<TopicResource>();
+    public ICollection<UserTopicProgress> UserProgresses { get; set; } = new List<UserTopicProgress>();
+}

MetaCourse.Api/Entities/TopicResource.cs

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+namespace MetaCourse.Api.Entities;
+
+public class TopicResource
+{
+    public Guid TopicId { get; set; }
+    public Topic Topic { get; set; } = null!;
+
+    public Guid ResourceId { get; set; }
+    public Resource Resource { get; set; } = null!;
+
+    public int Position { get; set; }
+}

MetaCourse.Api/Entities/User.cs

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+namespace MetaCourse.Api.Entities;
+
+public class User
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public string Name { get; set; } = string.Empty;
+    public string Email { get; set; } = string.Empty;
+    public string PasswordHash { get; set; } = string.Empty;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    public ICollection<Course> CreatedCourses { get; set; } = new List<Course>();
+    public ICollection<UserCourse> UserCourses { get; set; } = new List<UserCourse>();
+    public ICollection<UserTopicProgress> TopicProgresses { get; set; } = new List<UserTopicProgress>();
+    public ICollection<UserResourceProgress> ResourceProgresses { get; set; } = new List<UserResourceProgress>();
+}

MetaCourse.Api/Entities/UserCourse.cs

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+namespace MetaCourse.Api.Entities;
+
+public class UserCourse
+{
+    public Guid UserId { get; set; }
+    public User User { get; set; } = null!;
+
+    public Guid CourseId { get; set; }
+    public Course Course { get; set; } = null!;
+
+    public DateTime EnrolledAt { get; set; } = DateTime.UtcNow;
+    public DateTime? CompletedAt { get; set; }
+}

MetaCourse.Api/Entities/UserResourceProgress.cs

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+namespace MetaCourse.Api.Entities;
+
+public class UserResourceProgress
+{
+    public Guid UserId { get; set; }
+    public User User { get; set; } = null!;
+
+    public Guid ResourceId { get; set; }
+    public Resource Resource { get; set; } = null!;
+
+    public bool Completed { get; set; }
+    public DateTime? CompletedAt { get; set; }
+}

MetaCourse.Api/Entities/UserTopicProgress.cs

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+namespace MetaCourse.Api.Entities;
+
+public class UserTopicProgress
+{
+    public Guid UserId { get; set; }
+    public User User { get; set; } = null!;
+
+    public Guid TopicId { get; set; }
+    public Topic Topic { get; set; } = null!;
+
+    public bool Completed { get; set; }
+    public DateTime? CompletedAt { get; set; }
+}