# Library Cluster Feature - Implementation Progress

## 📊 Implementation Status

**Last Updated**: 2025-10-12  
**Overall Progress**: 85% Complete (Phase 1, 2, 3 & Folder View Complete)

---

## ✅ Completed Tasks

### Phase 1: Database & Backend Foundation (COMPLETE) ✅
**Status**: ✅ COMPLETE  
**Time Spent**: ~1 hour  
**Completion Date**: 2025-10-11

#### Task 1.1: Database Schema Migration ✅
- [x] Added `clusters` table to database schema
- [x] Added `library_cluster_mapping` table
- [x] Created 3 new indexes for performance
- [x] Added TypeScript interfaces (Cluster, ClusterWithStats, LibraryClusterMapping)
- [x] Updated `/src/db/index.ts`
- [x] Build successful with no errors

**Files Modified**:
- `/src/db/index.ts` (58 lines added)

#### Task 1.2: Cluster Management APIs ✅
- [x] GET /api/clusters - List all clusters with stats
- [x] POST /api/clusters - Create new cluster
- [x] GET /api/clusters/[id] - Get cluster details
- [x] PUT /api/clusters/[id] - Update cluster
- [x] DELETE /api/clusters/[id] - Delete cluster

**Files Created**:
- `/src/app/api/clusters/route.ts` (99 lines)
- `/src/app/api/clusters/[id]/route.ts` (175 lines)

**Features**:
- ✓ Input validation (name, color format)
- ✓ Duplicate name detection
- ✓ Error handling
- ✓ Statistics aggregation

#### Task 1.3: Library-Cluster Mapping APIs ✅
- [x] GET /api/clusters/[id]/libraries - Get cluster libraries
- [x] POST /api/clusters/[id]/libraries - Assign libraries
- [x] DELETE /api/clusters/[id]/libraries/[libraryId] - Remove library

**Files Created**:
- `/src/app/api/clusters/[id]/libraries/route.ts` (108 lines)
- `/src/app/api/clusters/[id]/libraries/[libraryId]/route.ts` (43 lines)

**Features**:
- ✓ Bulk library assignment
- ✓ Duplicate mapping prevention
- ✓ Library existence validation
- ✓ Detailed error reporting

#### Task 1.4: Cluster Media Query APIs ✅
- [x] GET /api/clusters/[id]/videos - Query videos with pagination
- [x] GET /api/clusters/[id]/photos - Query photos with pagination
- [x] GET /api/clusters/[id]/texts - Query texts with pagination
- [x] GET /api/clusters/[id]/stats - Get cluster statistics

**Files Created**:
- `/src/app/api/clusters/[id]/videos/route.ts` (85 lines)
- `/src/app/api/clusters/[id]/photos/route.ts` (85 lines)
- `/src/app/api/clusters/[id]/texts/route.ts` (85 lines)
- `/src/app/api/clusters/[id]/stats/route.ts` (52 lines)

**Features**:
- ✓ Pagination (limit/offset)
- ✓ Search filtering
- ✓ Media count tracking
- ✓ Statistics aggregation

---

### Phase 2: Settings UI Implementation (COMPLETE) ✅
**Status**: ✅ COMPLETE  
**Time Spent**: ~2 hours  
**Completion Date**: 2025-10-11

#### Task 2.1: Cluster Management Component ✅
- [x] Create ClusterManagement component
- [x] Cluster list with create/edit/delete
- [x] Color picker integration (8 predefined colors)
- [x] Icon selector component (10 icons)
- [x] Form validation
- [x] Library multi-select
- [x] Statistics display

**Files Created**:
- `/src/components/cluster-management.tsx` (458 lines)

**Features**:
- ✓ Create/Edit/Delete clusters
- ✓ Visual color picker with 8 colors
- ✓ Icon selector with 10 icons (folder, film, tv, image, book, database, archive, star, heart, flag)
- ✓ Multi-select library assignment
- ✓ Real-time statistics (library count, media count, storage)
- ✓ Inline editing mode
- ✓ Form validation
- ✓ Error handling with user feedback
- ✓ Loading states

#### Task 2.2: Library-to-Cluster Assignment UI ✅
- [x] Integrated into ClusterManagement component
- [x] Multi-select checkboxes
- [x] Visual assignment interface
- [x] Bulk assignment support

**Implementation Note**: Combined with Task 2.1 for better UX - integrated directly into the create/edit form

#### Task 2.3: Update Library Cards ✅
- [x] Show cluster badges on library cards
- [x] Color-coded badges
- [x] Responsive badge display
- [x] Tooltips with descriptions

**Files Created**:
- `/src/components/library-cluster-badges.tsx` (76 lines)

**Files Modified**:
- `/src/app/settings/page.tsx` (integrated ClusterManagement and LibraryClusterBadges)

**Features**:
- ✓ Dynamic cluster badge loading per library
- ✓ Color-coded badges matching cluster colors
- ✓ Tooltips with cluster descriptions
- ✓ Loading states (skeleton)
- ✓ "No clusters" fallback text
- ✓ Automatic refresh on cluster changes

---

### Phase 3: Navigation & Viewing (COMPLETE) ✅
**Status**: ✅ COMPLETE  
**Time Spent**: ~2 hours  
**Completion Date**: 2025-10-12

#### Task 3.1: Update Sidebar ✅
- [x] Add "Clusters" section to sidebar
- [x] List all clusters with color-coded icons
- [x] Collapsible section with expand/collapse
- [x] Click to navigate to cluster view
- [x] Color-coded indicators matching cluster colors
- [x] Icon components for each cluster type

**Files Modified**:
- `/src/components/sidebar.tsx` (95 lines added)

**Features**:
- ✓ Collapsible "Clusters" section
- ✓ Fetches clusters from API on load
- ✓ Color-coded circular icons with cluster colors
- ✓ Icon mapping for all 10 cluster icons
- ✓ Click navigation to `/clusters/[id]`
- ✓ Visual active state when on cluster page
- ✓ Responsive collapsed/expanded states

#### Task 3.2: Create Cluster View Page ✅
- [x] Create `/app/clusters/[id]/page.tsx`
- [x] Cluster header with name, icon, color, description
- [x] Statistics cards (Videos, Photos, Texts, Storage)
- [x] Tabbed interface (Videos/Photos/Texts/Stats)
- [x] Reuse InfiniteVirtualGrid with custom API endpoint
- [x] Search functionality
- [x] Media player integration (video/photo/text viewers)
- [x] Error handling and loading states

**Files Created**:
- `/src/app/clusters/[id]/page.tsx` (468 lines)

**Files Modified**:
- `/src/components/infinite-virtual-grid.tsx` (added apiEndpoint prop)

**Features**:
- ✓ Beautiful cluster header with color theming
- ✓ Real-time statistics cards
- ✓ Tabbed interface with media counts
- ✓ Unified media grid with custom API endpoints
- ✓ Video player modal integration
- ✓ Photo viewer modal integration
- ✓ Text viewer modal integration
- ✓ Bookmark and rating functionality
- ✓ Back navigation
- ✓ Loading and error states
- ✓ Libraries breakdown in Stats tab
- ✓ Responsive design

#### Task 3.3: Enhanced Media Grid Component ✅
- [x] Added apiEndpoint prop to InfiniteVirtualGrid
- [x] Support for custom cluster API endpoints
- [x] Backward compatibility with existing usage
- [x] Proper response format handling

**Features**:
- ✓ Custom API endpoint support
- ✓ Handles different response formats (cluster vs default APIs)
- ✓ Maintains existing functionality
- ✓ Named export for flexible imports

---

### Phase 3.5: Folder View Tab - Backend (COMPLETE) ✅
**Status**: ✅ COMPLETE  
**Time Spent**: ~1 hour  
**Completion Date**: 2025-10-12

#### Task 3.5.1: Cluster Folders API ✅
- [x] Create `/api/clusters/[id]/folders` endpoint
- [x] Virtual root handler (returns library list with statistics)
- [x] Folder contents handler (returns files and subfolders)
- [x] Path validation (prevents access outside cluster)
- [x] Media metadata integration (ratings, bookmarks)
- [x] Pagination support
- [x] Error handling (403, 404, 400, 500)
- [x] Directory item counting
- [x] Sorting (folders first, then files, alphabetical)

**Files Created**:
- `/src/app/api/clusters/[id]/folders/route.ts` (280 lines)
- `/docs/CLUSTER_FOLDER_API_TESTS.md` (284 lines - testing guide)

**Features**:
- ✓ Virtual root: Lists cluster libraries with statistics
- ✓ Folder navigation: Returns directory contents with metadata
- ✓ Path security: Validates paths belong to cluster libraries
- ✓ Media integration: Includes ratings, bookmarks, thumbnails
- ✓ Directory stats: Shows item counts for folders
- ✓ File system access: Reads actual directory structure
- ✓ Pagination: Limit/offset for large folders
- ✓ Error states: 403 (forbidden), 404 (not found), 400 (bad request)
- ✓ TypeScript: No compilation errors

**API Endpoints**:
```
GET /api/clusters/[id]/folders              - Virtual root (library list)
GET /api/clusters/[id]/folders?path={path}  - Folder contents
```

**Testing Documentation**: Created `/docs/CLUSTER_FOLDER_API_TESTS.md` with 7 test scenarios

---

### Phase 3.6: Folder View Tab - Frontend (COMPLETE) ✅
**Status**: ✅ COMPLETE  
**Time Spent**: ~2 hours  
**Completion Date**: 2025-10-12

#### Task 3.6.1: ClusterFolderView Component ✅
- [x] Create ClusterFolderView component
- [x] Virtual root library card rendering
- [x] Library statistics display (items, size, media counts)
- [x] Folder navigation state management
- [x] Breadcrumb system (Cluster → Library → Folders)
- [x] Back navigation logic
- [x] Click handlers for libraries and navigation
- [x] Integration with VirtualizedFolderGrid
- [x] Cluster color theming on library cards
- [x] Loading and error states

**Files Created**:
- `/src/components/cluster-folder-view.tsx` (393 lines)

**Features**:
- ✓ Virtual root display: Library cards with statistics
- ✓ Library click navigation: Navigate into library folders
- ✓ Breadcrumb navigation: Cluster name (color-coded) → Library → Folders
- ✓ Back button: Returns to parent folder or virtual root
- ✓ State management: Tracks current path and virtual root state
- ✓ API integration: Connects to `/api/clusters/[id]/folders`
- ✓ Cluster theming: Library cards use cluster colors
- ✓ Statistics: Shows itemCount, videoCount, photoCount, textCount, totalSize
- ✓ Empty states: Handles clusters with no libraries
- ✓ Error handling: Displays errors with retry option

#### Task 3.6.2: VirtualizedFolderGrid Enhancement ✅
- [x] Add clusterId prop
- [x] Add clusterApiMode prop
- [x] Conditional API endpoint (cluster vs regular)
- [x] Handle cluster API response format
- [x] Backward compatibility maintained

**Files Modified**:
- `/src/components/virtualized-media-grid.tsx` (48 lines added)

**Features**:
- ✓ Cluster mode support: Uses `/api/clusters/[id]/folders?path=...`
- ✓ Regular mode support: Uses `/api/files?path=...`
- ✓ Response format handling: Adapts to cluster API format (items array)
- ✓ Backward compatible: Existing folder viewer unchanged

#### Task 3.6.3: Cluster Page Integration ✅
- [x] Import ClusterFolderView component
- [x] Add 'folders' to MediaType union
- [x] Add Folders tab to navigation
- [x] Set Folders as default tab
- [x] Add Folders tab content section
- [x] Pass necessary props to ClusterFolderView

**Files Modified**:
- `/src/app/clusters/[id]/page.tsx` (25 lines added)

**Features**:
- ✓ New "Folders" tab (first tab position)
- ✓ Default tab on cluster page load
- ✓ Integrates with existing video/photo/text viewers
- ✓ Maintains cluster color theming
- ✓ Passes cluster data and handlers to ClusterFolderView

**UI Flow**:
```
Cluster Page → Folders Tab (default)
  ↓
Virtual Root: Shows library cards with stats
  ↓ (Click library)
Library Root: Shows folders and files
  ↓ (Click folder)
Subfolder: Shows nested contents
  ↓ (Click media file)
Media Viewer: Video/Photo/Text player
```

**Breadcrumb Examples**:
```
Virtual Root: (no breadcrumbs)
Library Root: My Cluster > /mnt/movies
Subfolder:    My Cluster > /mnt/movies > 2023 > January
```

---

## 📋 Next Tasks (Phase 4)

### Phase 3: Navigation & Viewing (PENDING)
**Estimated Time**: 5 hours  
**Priority**: P1 High

#### Task 3.1: Update Sidebar (PENDING)
- [ ] Add "Clusters" section to sidebar
- [ ] List all clusters with icons
- [ ] Color-coded indicators
- [ ] Click to navigate to cluster view
- [ ] Collapsible section

**Files to Modify**:
- `/src/components/sidebar.tsx`

#### Task 3.2: Create Cluster View Page (PENDING)
- [ ] Create `/app/clusters/[id]/page.tsx`
- [ ] Cluster header with name, icon, color
- [ ] Tabbed interface (Videos/Photos/Texts/Stats)
- [ ] Reuse existing virtualized grid components
- [ ] Pagination support
- [ ] Search functionality

**Files to Create**:
- `/src/app/clusters/[id]/page.tsx`

#### Task 3.3: Add Cluster Statistics (PENDING)
- [ ] Overview cards (media counts, storage)
- [ ] Library breakdown
- [ ] Media type distribution
- [ ] Recent activity

**Part of**: Cluster View Page (Task 3.2)

---

## 📦 Code Summary

### Database Changes
```sql
-- New Tables: 2
CREATE TABLE clusters (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  name TEXT NOT NULL UNIQUE,
  description TEXT,
  color TEXT DEFAULT '#6366f1',
  icon TEXT DEFAULT 'folder',
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE library_cluster_mapping (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  library_id INTEGER NOT NULL,
  cluster_id INTEGER NOT NULL,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (library_id) REFERENCES libraries(id) ON DELETE CASCADE,
  FOREIGN KEY (cluster_id) REFERENCES clusters(id) ON DELETE CASCADE,
  UNIQUE(library_id, cluster_id)
);

-- New Indexes: 3
CREATE INDEX idx_library_cluster_mapping_library ON library_cluster_mapping(library_id);
CREATE INDEX idx_library_cluster_mapping_cluster ON library_cluster_mapping(cluster_id);
CREATE INDEX idx_clusters_name ON clusters(name);
```

### API Endpoints Created: 9
```
GET    /api/clusters                              - List all clusters with stats
POST   /api/clusters                              - Create new cluster
GET    /api/clusters/[id]                         - Get cluster details
PUT    /api/clusters/[id]                         - Update cluster metadata
DELETE /api/clusters/[id]                         - Delete cluster
GET    /api/clusters/[id]/libraries               - Get libraries in cluster
POST   /api/clusters/[id]/libraries               - Assign libraries to cluster
DELETE /api/clusters/[id]/libraries/[libraryId]   - Remove library from cluster
GET    /api/clusters/[id]/videos                  - Get videos with pagination
GET    /api/clusters/[id]/photos                  - Get photos with pagination
GET    /api/clusters/[id]/texts                   - Get texts with pagination
GET    /api/clusters/[id]/stats                   - Get cluster statistics
```

### TypeScript Interfaces: 3
```typescript
interface Cluster {
  id: number;
  name: string;
  description?: string;
  color: string;
  icon: string;
  created_at: string;
  updated_at: string;
}

interface ClusterWithStats extends Cluster {
  library_count: number;
  media_count: number;
  video_count: number;
  photo_count: number;
  text_count: number;
  total_size: number;
}

interface LibraryClusterMapping {
  id: number;
  library_id: number;
  cluster_id: number;
  created_at: string;
}
```

### React Components Created: 2
```
ClusterManagement         - Main cluster CRUD interface
LibraryClusterBadges      - Display cluster badges on library cards
```

---

## 🧪 Testing Status

### Backend API Tests (Manual)
- [ ] Test cluster CRUD operations
- [ ] Test library assignment/removal
- [ ] Test media queries with pagination
- [ ] Test statistics accuracy
- [ ] Test error handling

### Frontend UI Tests
- [ ] Test cluster creation flow
- [ ] Test cluster editing flow
- [ ] Test cluster deletion
- [ ] Test library assignment
- [ ] Test badge display on library cards

### Database Tests
- [x] Schema migration successful
- [x] Tables created
- [x] Indexes created
- [x] Foreign key constraints working
- [x] No TypeScript errors
- [x] Build successful

---

## 📊 Statistics

- **Files Created**: 13
  - 10 API routes
  - 2 React components
  - 1 database migration

- **Files Modified**: 2
  - `/src/db/index.ts`
  - `/src/app/settings/page.tsx`

- **Lines of Code Added**: ~1,550 lines
  - Backend APIs: ~650 lines
  - React Components: ~530 lines
  - Database schema: ~60 lines
  - Settings page integration: ~10 lines

- **API Endpoints**: 9 new endpoints
- **Database Tables**: 2 new tables
- **Database Indexes**: 3 new indexes
- **React Components**: 2 new components
- **Time Spent**: ~3 hours total
- **Build Status**: ✅ Success

---

## 🚀 Next Steps

1. **Immediate**: Start Phase 3 - Navigation & Viewing
2. **Priority**: Update sidebar with clusters section
3. **Then**: Create cluster view page with tabbed interface

---

## 📝 Notes

### Design Decisions:
- **Colors**: 8 predefined colors (Indigo, Blue, Green, Red, Purple, Pink, Orange, Yellow)
- **Icons**: 10 icons (folder, film, tv, image, book, database, archive, star, heart, flag)
- **Color format**: Hex format (#RRGGBB) with validation
- **Default color**: Indigo (#6366f1)
- **Default icon**: folder
- **Cluster names**: Limited to 100 characters
- **Pagination**: Defaults to 50 items per page
- **UI Integration**: Combined Task 2.1 and 2.2 for better UX

### Technical Highlights:
- Zero-downtime migration (IF NOT EXISTS)
- Foreign key cascades for data integrity
- Optimized indexes for cluster queries
- Comprehensive error handling
- Input validation at both API and UI levels
- Real-time statistics with efficient queries
- Loading states for better UX
- Color-coded visual feedback

### UI/UX Features:
- Inline editing mode for clusters
- Visual color picker
- Icon selector with preview
- Multi-select library assignment
- Real-time statistics display
- Cluster badges on library cards
- Responsive design
- Loading skeletons
- Error messages with context

### Known Issues:
- None currently

### Performance Considerations:
- LibraryClusterBadges fetches all clusters then filters - could be optimized with dedicated API endpoint
- Consider caching cluster assignments in future iteration

---

**Phases 1 & 2 Complete!** 🎉  
**50% Progress - Ready for Phase 3: Navigation & Viewing**