Refactor backend

[melihakpinar]

Overview

This PR implements several key features and improvements to enhance the user experience and functionality of our platform:

1. User Profile System
2. Post Scoring & Recommendation Logic
3. Improved Post Management
4. Enhanced Subforum Features

Key Changes

User Profile System

• Implemented comprehensive /api/user/profile endpoint that returns:
  • Basic user info (username, avatar)
  • Activity metrics (post count, follower count)
  • Follow relationship status
  • Curated lists of popular and recent posts
• Fixed setUserDetails endpoint to properly handle profile photo uploads
• Added proper user type/tag information in API responses

Post Scoring & Feed Algorithms

• Implemented sophisticated post scoring for different feed types:
  • For You: Posts are scored based on:
    • User tag match (+3 points)
    • Comment creator tag match (+2 points)
    • General engagement (+1 point per comment)
    • Like/dislike ratio
  • Popular: Posts are ranked by engagement:
    • Likes (+1 point)
    • Comments (+2 points)
    • Dislikes (+1 point)
  • Recent: Pure chronological order with engagement boost:
    • Base chronological sorting

Post Management Improvements

• Added view count tracking for posts
• Implemented proper date fields for posts and comments
• Added admin privileges for content moderation
• Enhanced image handling with UUID-based filenames

Subforum Enhancements

• Added color field for visual customization
• Implemented admin-only subforum management
• Added proper validation and error handling

Technical Details

New Models & Repositories

• Enhanced repository interfaces for:
  • Posts
  • Comments
  • Subforums
  • Likes/Dislikes
  • Follows

File Structure Improvements

• Reorganized service layer for better separation of concerns
• Consolidated related functionalities into appropriate services
• Improved consistency in response formats

Security & Permissions

• Added proper admin role checks for sensitive operations
• Implemented user authentication validation
• Added ownership verification for content modification

Impact

This PR significantly improves the platform's social features and content discovery mechanisms. The new scoring algorithms provide more relevant content to users while maintaining engagement through proper content organization and discovery.