insertr/VERSION-CONTROL-SUMMARY.md

Version Control Implementation Summary

🎯 What We Built

A complete version control system for the Insertr CMS with user attribution, rollback functionality, and modern database architecture using sqlc.

🏗️ Architecture Changes

Database Layer (sqlc + Modern Schema)

• sqlc Integration: Type-safe Go database code generated from SQL
• Clean Schema: content + content_versions tables with proper indexing
• User Attribution: Track who made each change with timestamps
• Version History: Complete edit history preserved automatically

API Enhancements

• Version Endpoints: GET /{id}/versions, POST /{id}/rollback
• User Attribution: X-User-ID header support for all operations
• Automatic Versioning: Current content archived before any update
• Clean Error Handling: Proper HTTP status codes and error messages

Frontend Version Control UI

• History Button: Added to all edit forms
• Version Modal: Professional GitHub-style version history display
• One-Click Rollback: Restore any previous version instantly
• User Attribution: Display who made each change and when
• Version Comparison: Preview content changes before restoring

🔧 Technical Implementation

ID Generation System (Fixed)

• Deterministic IDs: Same content always generates same ID
• CLI ↔ JS Consistency: Both systems use identical SHA-1 based algorithm
• Content-Based Versioning: Content changes create new IDs naturally
• Developer Override: HTML id attribute takes precedence over generated IDs

Database Schema

-- Current content (latest versions only)
CREATE TABLE content (
    id TEXT NOT NULL,
    site_id TEXT NOT NULL, 
    value TEXT NOT NULL,
    type TEXT NOT NULL,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    last_edited_by TEXT,
    PRIMARY KEY (id, site_id)
);

-- Complete version history
CREATE TABLE content_versions (
    version_id INTEGER PRIMARY KEY AUTOINCREMENT,
    content_id TEXT NOT NULL,
    site_id TEXT NOT NULL,
    value TEXT NOT NULL,
    type TEXT NOT NULL,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    created_by TEXT
);

API Workflow Example

# 1. Create content
POST /api/content
{"id": "hero-title", "value": "Original", "type": "text"}

# 2. Update (auto-archives current version)
PUT /api/content/hero-title?site_id=demo
{"value": "Updated content"}

# 3. View history
GET /api/content/hero-title/versions?site_id=demo
# Returns: [{"version_id": 1, "value": "Original", "created_by": "user"}]

# 4. Rollback 
POST /api/content/hero-title/rollback?site_id=demo
{"version_id": 1}

🎮 User Experience

Content Editor Workflow

1. Click Edit on any class="insertr" element
2. Professional Modal opens with current content
3. View History button shows version timeline
4. Version Modal displays all changes with timestamps and authors
5. One-Click Restore to any previous version
6. All Changes Tracked automatically with user attribution

Developer Experience

• Zero Configuration: Still just add class="insertr"
• Hidden Complexity: Version control happens transparently
• Full Control: HTML id attribute overrides system-generated IDs
• Type Safety: sqlc provides compile-time SQL validation
• Modern Tooling: Professional database migration workflow

📊 Features Delivered

✅ Core Version Control

• Complete Edit History: Every change preserved permanently
• User Attribution: Track who made each change
• One-Click Rollback: Restore any previous version instantly
• Automatic Versioning: No manual intervention required

✅ Professional UI

• GitHub-Style History: Familiar version control interface
• Version Comparison: See what changed between versions
• User-Friendly Timestamps: "2h ago", "yesterday", etc.
• Responsive Design: Works on mobile and desktop

✅ Developer Tools

• sqlc Integration: Type-safe database operations
• Clean Database Schema: Proper indexing and relationships
• Development Commands: just server-generate, just server-clean-db
• API Documentation: Complete endpoint reference

✅ Production Ready

• SQLite → PostgreSQL: Easy database migration path
• Proper Error Handling: Informative error messages
• CORS Configured: Multi-origin support for development
• Health Checks: Monitoring and debugging endpoints

🚀 What's Different Now

Before: Basic CMS

• Simple content editing
• No version history
• Temporal ID conflicts
• No user tracking

After: Professional CMS

• Complete version control with rollback
• User attribution for all changes
• Deterministic ID system (CLI ↔ JS consistent)
• Modern database architecture (sqlc)
• Professional editing UI with history
• Production-ready API with proper error handling

📋 Development Workflow Enhanced

New Commands

# Generate database code from SQL
just server-generate

# Clean development database  
just server-clean-db

# Full version control development
just dev  # Now includes version history UI

Updated Files

• Database: insertr-server/db/ - Complete sqlc setup
• API: internal/api/handlers.go - Version control endpoints
• Frontend: lib/src/ui/form-renderer.js - History modal UI
• Docs: Updated README.md with version control features

🎯 Result

Insertr now provides WordPress-style version control with:

• Professional editing experience
• Complete change tracking
• Easy rollback functionality
• Modern database architecture
• Type-safe backend code

All while maintaining the "zero configuration" philosophy - developers still just add class="insertr" and get a complete CMS with version control.