Applying Soft Delete & integrate user identity

[hadeer-r]

Changes

1. Adding ITrackable interface
2. move all Delete Behaviours to No Action
3. Implement the IdentityUser interface in the app and change the name of the User Entity to ApplicationUser.

Summary by CodeRabbit

• New Features

  • Integrated ASP.NET Core Identity for enhanced user authentication and role management.
  • Introduced soft delete functionality, allowing users and content (threads, comments, likes, notifications, follows, saved threads) to be marked as deleted without permanent removal.

• Improvements

  • Updated user-related entities and relationships to support ASP.NET Identity conventions.
  • Modified delete behaviors across the platform to prevent automatic removal of related data, improving data integrity and recoverability.

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Walkthrough

This update integrates ASP.NET Core Identity into the application, replacing the custom User entity with ApplicationUser inheriting from IdentityUser<int>. It introduces soft-delete support via an ITrackable interface and corresponding properties across multiple models. Database migrations and configurations are updated to reflect these changes, including schema adjustments and altered foreign key behaviors.

Changes

Cohort / File(s)	Change Summary
Identity Integration & User Model Refactor AskFm.DAL/Models/ApplicationUser.cs, AskFm.DAL/ModelsConfigrations/ApplicationUserConfigration.cs, AskFm.API/Program.cs, AskFm.DAL/AppDbContext.cs, AskFm.DAL/Migrations/20250810034350_using_identity.cs, AskFm.DAL/Migrations/20250810034350_using_identity.Designer.cs, AskFm.DAL/Migrations/AppDbContextModelSnapshot.cs	Replaced custom User entity with ApplicationUser inheriting from IdentityUser<int>, updated configuration, registered Identity services, and migrated database schema to ASP.NET Identity conventions.
Soft Delete Implementation AskFm.DAL/Models/ITrackable.cs, AskFm.DAL/Models/Comment.cs, AskFm.DAL/Models/CommentLike.cs, AskFm.DAL/Models/Follow.cs, AskFm.DAL/Models/Notification.cs, AskFm.DAL/Models/SavedThreads.cs, AskFm.DAL/Models/Thread.cs, AskFm.DAL/Models/ThreadLike.cs, AskFm.DAL/AppDbContext.cs, AskFm.DAL/Migrations/20250810015924_Soft_Delete.cs, AskFm.DAL/Migrations/20250810015924_Soft_Delete.Designer.cs, AskFm.DAL/Migrations/AppDbContextModelSnapshot.cs	Introduced ITrackable interface and implemented soft-delete properties (IsDeleted, DeletedAt) in all major domain models. Updated context and migrations to handle soft-delete fields.
Foreign Key Delete Behavior Adjustments AskFm.DAL/ModelsConfigrations/CommentConfigration.cs, AskFm.DAL/ModelsConfigrations/CommentLikeConfigration.cs, AskFm.DAL/ModelsConfigrations/NotificationConfigration.cs, AskFm.DAL/ModelsConfigrations/ThreadConfigration.cs, AskFm.DAL/ModelsConfigrations/ThreadLikeConfigration.cs, AskFm.DAL/Migrations/20250810021444_set_no_action_OnDelete.cs, AskFm.DAL/Migrations/20250810021444_set_no_action_OnDelete.Designer.cs, AskFm.DAL/Migrations/AppDbContextModelSnapshot.cs	Changed foreign key delete behaviors from Cascade or ClientSetNull to NoAction in entity configurations and migrations, preventing automatic deletions of related entities.
Project Dependency Updates AskFm/AskFm.API/AskFm.API.csproj, AskFm/AskFm.DAL/AskFm.DAL.csproj	Added Microsoft.AspNetCore.Identity.EntityFrameworkCore package reference to both API and DAL projects.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant API
    participant Identity
    participant DbContext

    Client->>API: Registers or logs in
    API->>Identity: Uses ApplicationUser (IdentityUser<int>)
    Identity->>DbContext: Stores/Retrieves user data
    DbContext-->>Identity: Returns user/role info
    Identity-->>API: Authentication result
    API-->>Client: Response

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sequenceDiagram
    participant Service
    participant DbContext
    participant Entity (ITrackable)

    Service->>DbContext: Soft-delete entity
    DbContext->>Entity: Set IsDeleted = true, DeletedAt = now
    DbContext->>Database: Update entity record
    Database-->>DbContext: Acknowledgement
    DbContext-->>Service: Operation complete

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Estimated code review effort

🎯 4 (Complex) | ⏱️ ~45 minutes

Poem

Oh, what a hop through code today,
Identity lands, old users give way.
Soft deletes now gently sweep,
Marking records, not too deep.
Foreign keys hold on tight,
No more cascade in the night.
🐇 Cheers to progress—what a sight!

✨ Finishing Touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment

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[hadeer-r]

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