Implement emoji reactions feature to replace simple likes system

[Copilot]

Overview

This PR implements a comprehensive emoji reactions feature that allows users to react to posts with 6 different emotions instead of just simple likes. The system supports 👍 Like, ❤️ Love, 😂 Laugh, 😮 Surprise, 😢 Sad, and 😡 Angry reactions.

Changes Made

🗄️ Database

• New Migration: migrations/20250701_add_reactions_table.sql
  • Creates dedicated reactions table with reactionType field (0-5)
  • Includes proper indexes for performance optimization
  • Replaces usage of existing likes table for reactions

🚀 API Endpoints

• New Endpoint: method/reactions.react.inc.php
  • Handles setting/updating reactions with proper authentication
  • Supports accountId/accessToken validation
  • Returns reaction summary including user's current reaction

🔧 Backend Logic

• Updated Class: sys/class/class.reactions.inc.php
  • Modified to use dedicated reactions table instead of likes table
  • Added react() method for API compatibility
  • Updated all SQL queries to use reactionType instead of likeType

🎨 Frontend Components

• Template Partial: html/template-partials/post-reactions.inc.php

  • Complete reaction bar UI with emoji display
  • Shows current user reaction and reaction counts
  • Includes hover picker and modal integration
  • Built-in CSS styling for immediate use

• Updated JavaScript: public/js/reactions.js

  • Modified to use new /api/v2/method/reactions.react endpoint
  • Maintains all existing functionality (hover, modal, counts)

📚 Documentation & Examples

• Complete Documentation: REACTIONS_README.md

  • Installation instructions and API reference
  • Security and performance considerations
  • Customization guidelines

• Integration Example: examples/post-reactions-integration.php

  • Shows how to integrate reactions into existing post templates
  • Includes HTML structure and modal setup

Features

✅ Authentication: All reactions require valid user authentication
✅ Single Reaction: Users can only have one reaction per post
✅ Reaction Replacement: Selecting different reaction replaces current one
✅ Reaction Removal: Clicking same reaction removes it
✅ Real-time Updates: Counts and UI update immediately
✅ Modal View: Click counts to see detailed reaction lists
✅ Hover Interaction: Hover over reaction button to show picker
✅ Backwards Compatible: Existing reaction functionality preserved

Usage

// Simple integration in any post template
$post = array('id' => $postId, /* other post data */);
include_once("../html/template-partials/post-reactions.inc.php");

// JavaScript automatically handles interactions
// Just include: <script src="/public/js/reactions.js"></script>

Testing

All components have been tested for:

• ✅ PHP syntax validation
• ✅ JavaScript functionality
• ✅ SQL migration structure
• ✅ API endpoint parameters
• ✅ File existence and integrity

Migration Required

To deploy this feature, run the database migration:

-- Execute migrations/20250701_add_reactions_table.sql

This creates the new reactions table with proper structure and indexes for optimal performance.

Backward Compatibility

The existing reactions.make.inc.php and reactions.get.inc.php endpoints remain functional. The new reactions.react.inc.php provides the primary interface while maintaining compatibility with existing integrations.

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