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Karaoke App - Product Requirements Document

Platform-Agnostic Business Logic & Firebase Architecture
For implementation details, see platform-specific PRDs in platforms/ folder

This document defines the core business logic, data models, and Firebase architecture for the Karaoke App. All platform-specific implementation details are documented in separate platform PRDs.

How to Use This PRD

For AI-Assisted Development:

  1. Read this PRD completely for core business logic and Firebase structure
  2. Choose your platform and read the corresponding platform PRD:
    • Web: platforms/web/PRD-web.md
    • iOS: platforms/ios/PRD-ios.md (future)
    • Android: platforms/android/PRD-android.md (future)
  3. Follow the implementation guide in Section 29
  4. Reference design assets in the platform-specific design folder

For Human Developers:

  • Reference during implementation for business logic and data flows
  • Guide for architecture decisions and technology choices
  • Source of truth for all functional requirements
  • Migration guide when switching frameworks/platforms

1. Purpose

This document defines the functional, technical, and UX requirements for the Karaoke App, designed for in-home party use. The app leverages Firebase Realtime Database for real-time synchronization, with all business logic and validation handled client-side.

Core Principles:

  • Platform-Agnostic Design - Core requirements work on any platform
  • Real-time Synchronization - All clients stay in sync via Firebase
  • Client-Side Business Logic - All validation and rules enforced in app
  • Single Session Focus - Designed for one-party-at-a-time use
  • Admin/User Role System - Different permissions for different users

2. Scope & Business Objectives

Primary Goals:

  • Deliver a single-session karaoke experience where users connect to a controller and manage/search songs
  • Utilize Firebase for real-time multi-user synchronization of queues, history, and playback state
  • Prioritize fast performance, reusable modular architecture, and clear business logic separation
  • Enable adding songs from multiple entry points (search, history, top played, favorites, new songs, artists, song lists)
  • Ensure graceful handling of Firebase sync issues using retry patterns and partial node updates

Architecture Principles:

  • True Separation of Concerns - UI components only handle presentation
  • Reusable Business Logic - Business rules implemented in platform-agnostic services
  • Testable Code - Business logic separated from UI for easy testing
  • Maintainability - Changes to logic don't affect UI
  • Performance - Optimized data access and state management
  • Type Safety - Strong typing throughout the codebase
  • Single Responsibility - Each file has one clear purpose

3. User Roles & Permissions

Core Requirements (Platform-Agnostic):

Two User Roles:

  1. Host/Admin - Full control over the karaoke session
  2. Singer/User - Can add songs and view content

Admin Permissions:

  • Queue Management - Reorder or delete queue items
  • Playback Control - Play, pause, stop the music
  • Singer Management - Add or remove singers
  • Settings Access - Change player settings (autoadvance, userpick)
  • Song Management - Disable or enable songs

User Permissions:

  • Add Songs - Add songs to queue from any source
  • View Content - Browse songs, history, favorites, etc.
  • Manage Favorites - Add/remove personal favorites

Business Rules:

  • First Queue Item Protection - Cannot be deleted while playing (only when stopped/paused)
  • Automatic Singer Addition - Singers are automatically added to the list when they join
  • Admin Access Control - Admin mode is a privileged state (see platform details for implementation)

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#authentication for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#authentication (future)
  • Android: See platforms/android/PRD-android.md#authentication (future)

4. Feature Overview

Authentication & Session Management

Requirements (Platform-Agnostic):

  • Login requires both Party ID and singer name
  • Party ID is validated against the backend before login is allowed
  • Authentication state is managed in the app state and lost on app reload (unless platform supports persistence)
  • Admin access is a privileged mode (see platform details for implementation)

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#authentication for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#authentication (future)
  • Android: See platforms/android/PRD-android.md#authentication (future)

Search

Requirements (Platform-Agnostic):

  • Local search on preloaded song catalog
  • Instant search results as user types
  • Paginated/infinite scroll results
  • Context actions for each song (add to queue, favorite, etc.)

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#search for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#search (future)
  • Android: See platforms/android/PRD-android.md#search (future)

Queue Management

Requirements (Platform-Agnostic):

  • Shared queue synchronized across all clients
  • Queue items must always use sequential numerical keys (0, 1, 2, ...)
  • The system must automatically fix any inconsistencies in order values or keys on every update
  • Queue reordering must be atomic; when two items are swapped, both order values are updated in a single operation
  • Only admins can reorder or delete queue items, and only when playback is stopped or paused
  • Duplicate songs are prevented in the queue by checking the song's path
  • Each queue item shows which singer added it

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#queue-management for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#queue-management (future)
  • Android: See platforms/android/PRD-android.md#queue-management (future)

Favorites

Requirements (Platform-Agnostic):

  • Shared favorites list synchronized across all clients
  • Anyone can add/remove favorites
  • Duplicate prevention by song path
  • Paginated/infinite scroll display

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#favorites for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#favorites (future)
  • Android: See platforms/android/PRD-android.md#favorites (future)

New Songs

Requirements (Platform-Agnostic):

  • Shows recently added songs from the newSongs node
  • Real-time updates and infinite scroll

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#new-songs for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#new-songs (future)
  • Android: See platforms/android/PRD-android.md#new-songs (future)

Artists

Requirements (Platform-Agnostic):

  • Browse songs by artist with search functionality
  • Modal view for all songs by an artist
  • Song count per artist
  • Paginated/infinite scroll artist list

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#artists for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#artists (future)
  • Android: See platforms/android/PRD-android.md#artists (future)

Song Lists

Requirements (Platform-Agnostic):

  • Predefined song lists with themes/collections
  • Song matching to catalog
  • Expandable view for available versions
  • Modal interface for viewing list contents
  • Shows which songs are available in the catalog

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#song-lists for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#song-lists (future)
  • Android: See platforms/android/PRD-android.md#song-lists (future)

History Tracking

Requirements (Platform-Agnostic):

  • Songs automatically added to history when played
  • Shows when each song was last played
  • Append-only, shared across all clients
  • Paginated/infinite scroll display

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#history for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#history (future)
  • Android: See platforms/android/PRD-android.md#history (future)

Top Played

Requirements (Platform-Agnostic):

  • Popular songs generated by backend based on history
  • Shows play count for each song
  • Real-time updates and infinite scroll

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#top-played for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#top-played (future)
  • Android: See platforms/android/PRD-android.md#top-played (future)

Singer Management

Requirements (Platform-Agnostic):

  • Only admins can add or remove singers
  • Singer names must be unique and non-empty
  • Singers are automatically added to the list when they join
  • All users can view the current singers list
  • Tracks when each singer last joined

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#singer-management for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#singer-management (future)
  • Android: See platforms/android/PRD-android.md#singer-management (future)

Playback Control

Requirements (Platform-Agnostic):

  • Only admins can control playback (play, pause, stop)
  • Play button is disabled if the queue is empty
  • UI state (play/pause/stop) must reflect the current player state

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#playback-control for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#playback-control (future)
  • Android: See platforms/android/PRD-android.md#playback-control (future)

Error Handling & Sync

Requirements (Platform-Agnostic):

  • Graceful handling of sync failures with retry patterns
  • Full controller object loaded on initial connection
  • Incremental updates target specific child nodes
  • Real-time connection status monitoring
  • Graceful handling of missing or empty data

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#error-handling for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#error-handling (future)
  • Android: See platforms/android/PRD-android.md#error-handling (future)

Disabled Songs

Requirements (Platform-Agnostic):

  • Admins can disable or enable songs
  • Disabled songs are stored using a hash of the song path for key safety

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#disabled-songs for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#disabled-songs (future)
  • Android: See platforms/android/PRD-android.md#disabled-songs (future)

Settings

Requirements (Platform-Agnostic):

  • Only admins can change player settings (autoadvance, userpick)

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#settings for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#settings (future)
  • Android: See platforms/android/PRD-android.md#settings (future)

Navigation

Requirements (Platform-Agnostic):

  • Admin-only pages (e.g., settings) must be hidden from non-admin users

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#navigation for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#navigation (future)
  • Android: See platforms/android/PRD-android.md#navigation (future)

5. Data Models

Data models are defined externally in:

types.ts

This file contains TypeScript interfaces describing:

  • Song — Core song data with artist, title, path, and metadata
  • QueueItem — Queue entries with order, singer, and song data
  • Singer — User information with name and last login
  • SongList — Predefined song collections with metadata
  • SongListSong — Individual songs within a song list
  • TopPlayed — Popular songs with play count
  • Controller — Main object containing all app data
  • PlayerState — Playback status enum (Playing, Paused, Stopped)
  • Authentication — User session data with admin status
  • Settings — Player settings (autoadvance, userpick)

Key Data Relationships:

  • Songs are identified by their path field for duplicate prevention
  • Queue items have sequential order values for proper ordering
  • All data is stored as Firebase records with string keys
  • History tracks play dates and counts for each song

6. Firebase Realtime Database Structure

Defined externally in:

firebase_schema.json

Complete Structure:

controllers: {
  [controllerName]: {
    favorites: Record<string, Song>,
    history: Record<string, Song>,
    topPlayed: Record<string, TopPlayed>,
    newSongs: Record<string, Song>,
    disabledSongs: Record<string, DisabledSong>,
    player: { 
      queue: Record<string, QueueItem>,
      settings: Settings,
      singers: Record<string, Singer>,
      state: Player
    },
    songList: Record<string, SongList>,
    songs: Record<string, Song>
  }
}

Data Flow:

  • Initial Sync: Loads the complete controller object on connection
  • Real-time Updates: Subscribes to specific nodes for incremental updates
  • Key Management: Uses sequential numerical keys for queue items
  • Auto-initialization: Creates empty controller structure if none exists

Empty Controller Structure:

{
  "favorites": {},
  "history": {},
  "topPlayed": {},
  "newSongs": {},
  "disabledSongs": {},
  "player": {
    "queue": {},
    "settings": {
      "autoadvance": false,
      "userpick": false
    },
    "singers": {},
    "state": {
      "state": "stopped"
    }
  },
  "songList": {},
  "songs": {}
}

Key Generation Rules:

  • Queue Items: Sequential numerical keys (0, 1, 2, ...)
  • Top Played: sanitizedArtist_sanitizedTitle (lowercase, trimmed, invalid chars replaced with _)
  • Disabled Songs: Hash of song path (simple character-based hash)
  • Singers: Firebase push IDs (auto-generated)

Character Sanitization for Top Played Keys:

  • Replace invalid Firebase characters [.#$/[\]] with _
  • Convert to lowercase and trim whitespace
  • Format: ${sanitizedArtist}_${sanitizedTitle}

7. UI/UX Behavior

Core Requirements (Platform-Agnostic):

  • Responsive design that works on all device sizes
  • Support for light/dark mode themes
  • Modern, clean, intuitive interface with consistent styling
  • Accessibility support (keyboard navigation, screen readers)
  • Tab-based navigation with clear active states
  • Consistent empty state views for all lists
  • Loading states with spinner animations
  • Toast notifications for success/error feedback
  • Consistent button styling with variants
  • Reusable song display with context-aware actions
  • Infinite scroll for automatic loading of additional content
  • Context-specific behavior for different screens (search, queue, history, etc.)
  • Admin-specific UI elements (playback controls, queue reorder, singer management)

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#uiux-behavior for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#uiux-behavior (future)
  • Android: See platforms/android/PRD-android.md#uiux-behavior (future)

8. UI Rules & Constraints

Core Requirements (Platform-Agnostic):

Queue Management Rules:

  • Only admin users can reorder queue items
  • First queue item cannot be deleted while playing (only when stopped/paused)
  • Reorder constraints: items not at top/bottom can move up/down
  • Queue items must maintain sequential order (1, 2, 3, etc.)
  • Automatic cleanup of inconsistent order values on queue initialization
  • Queue items use sequential numerical keys (0, 1, 2, etc.)

Playback Control Rules:

  • Player controls only visible to admin users
  • Play button is disabled when queue is empty
  • State-based controls: play/pause/stop buttons shown/hidden based on current state
  • Current player state must be clearly displayed

Search Rules:

  • Search only activates after 2+ characters
  • Debounce delay before search execution
  • Search scope includes both song title and artist fields (case-insensitive)
  • Empty search shows all songs
  • Search resets to page 1 when search term changes

Pagination & Infinite Scroll Rules:

  • 20 items loaded per page
  • Load more logic only shows when there are more items than currently displayed
  • Triggers load more when user scrolls to bottom 10% of list
  • Each feature maintains its own page state independently
  • All lists must use pagination to prevent UI blocking
  • Progressive loading of items as user scrolls
  • Loading state management with spinner when no items are loaded yet
  • Page reset on search term changes
  • Memory optimization for smooth scrolling
  • Error handling for load more failures
  • Accessibility support for infinite scroll

Toast Notification Rules:

  • Duration settings: Success/Info 3 seconds, Error 5 seconds
  • Auto-dismiss after duration
  • Manual dismiss option
  • Multiple toasts can be displayed simultaneously

Authentication Rules:

  • Admin access is a privileged mode (see platform details for implementation)
  • Session persistence behavior varies by platform
  • Both Party ID and singer name required for login

Data Display Rules:

  • Loading states with spinner when data count is 0
  • Empty states when data exists but filtered results are empty
  • Debug information display for development
  • User attribution indicators for current user's queue items
  • Availability status for unmatched song list items

Action Button Rules:

  • Context-based actions for different screens
  • Permission-based visibility based on user role
  • State-based disabling of buttons
  • Confirmation feedback for all actions

Modal & Overlay Rules:

  • Modal views for artist songs and song lists
  • Proper backdrop and close actions

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#ui-rules for React/Ionic implementation details
  • iOS: See platforms/ios/PRD-ios.md#ui-rules (future)
  • Android: See platforms/android/PRD-android.md#ui-rules (future)

Error Handling Rules:

  • Graceful Degradation: App continues to work with cached data during connection issues
  • User Feedback: Clear error messages with recovery options
  • Retry Logic: Automatic retry for failed Firebase operations
  • Fallback Values: Default values provided for missing or corrupted data

Performance Rules:

  • Debouncing: Search input debounced to prevent excessive API calls
  • Incremental Loading: Large datasets loaded in chunks via infinite scroll
  • Optimistic Updates: UI updates immediately, with rollback on error
  • Connection Monitoring: Real-time connection status tracking

Data Validation Rules:

  • Type Safety: All data validated against TypeScript interfaces
  • Required Fields: Critical fields (controller name, singer name) validated before operations
  • Duplicate Prevention: Songs identified by path field for duplicate checking
  • Order Validation: Queue order automatically fixed if inconsistencies detected
  • Key Cleanup: Inconsistent Firebase keys automatically migrated to sequential format

9. Codebase Organization & File Structure

Platform-Agnostic Architecture:

  • Business Logic Layer - Core rules and validation
  • Data Access Layer - Firebase operations and data management
  • State Management Layer - Application state and synchronization
  • UI Layer - Platform-specific presentation components

Required Separation:

  • UI Components only handle presentation
  • Business Logic implemented in platform-agnostic services
  • Data Models shared across all layers
  • Firebase Integration abstracted through service layer

Architecture Principles:

  • Separation of Concerns - UI components handle presentation, business logic in services
  • Reusable Business Logic - Business rules implemented in platform-agnostic services
  • Testable Code - Business logic separated from UI for easy testing
  • Maintainability - Changes to logic don't affect UI
  • Performance - Optimized data access and state management
  • Type Safety - Strong typing throughout the codebase
  • Single Responsibility - Each file has one clear purpose

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#codebase-organization for React/Ionic structure
  • iOS: See platforms/ios/PRD-ios.md#codebase-organization (future)
  • Android: See platforms/android/PRD-android.md#codebase-organization (future)

10. External Reference Files

File Purpose
types.ts Core TypeScript interfaces for data models
firebase_schema.json Complete Firebase database structure
platforms/web/PRD-web.md Web-specific implementation details
platforms/web/design/ Web UI/UX design assets

11. Data Access Model & Validation

Client-Controlled Access Model:

  • No server-side validation - all rules enforced client-side
  • Firebase security rules allow full read/write access
  • Data validation against TypeScript interfaces before Firebase writes
  • Business logic implemented in application layer

Validation Requirements:

  • ✅ Data validation against TypeScript interfaces before Firebase writes
  • ✅ Required field validation for all critical operations
  • ✅ Duplicate prevention using song path field
  • ✅ Order validation for queue items
  • ✅ Permission validation for admin-only operations

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#data-access for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#data-access (future)
  • Android: See platforms/android/PRD-android.md#data-access (future)

12. Performance & Optimization

Core Performance Requirements:

  • Real-time synchronization with minimal latency
  • Efficient data loading with pagination and infinite scroll
  • Optimized state management to prevent unnecessary re-renders
  • Caching strategy for frequently accessed data
  • Memory management for large datasets

Performance Requirements:

  • Real-time synchronization with minimal latency
  • Efficient data loading with pagination and infinite scroll
  • Optimized state management to prevent unnecessary re-renders
  • Caching strategy for frequently accessed data
  • Memory management for large datasets
  • Component optimization for expensive UI operations
  • Data filtering and search with efficient algorithms

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#performance for React/Ionic optimization
  • iOS: See platforms/ios/PRD-ios.md#performance (future)
  • Android: See platforms/android/PRD-android.md#performance (future)

13. Error Handling & Resilience

Core Error Handling:

  • Firebase Connection: Graceful handling of connection issues
  • Data Sync: Retry patterns for failed operations
  • User Feedback: Clear error messages with recovery options
  • Graceful Degradation: App continues to work with cached data

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#error-handling for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#error-handling (future)
  • Android: See platforms/android/PRD-android.md#error-handling (future)

14. Testing Strategy

Core Testing Requirements:

  • Unit Testing: Business logic and data validation
  • Integration Testing: Firebase operations and data flow
  • UI Testing: User interactions and state changes
  • Performance Testing: Real-time sync and data loading

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#testing for React/Ionic testing
  • iOS: See platforms/ios/PRD-ios.md#testing (future)
  • Android: See platforms/android/PRD-android.md#testing (future)

15. Deployment & Environment

Core Deployment Requirements:

  • Environment Configuration: Firebase project setup
  • Build Process: Platform-specific build tools
  • Environment Variables: Configuration management
  • Deployment Targets: Platform-specific deployment

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#deployment for React/Ionic deployment
  • iOS: See platforms/ios/PRD-ios.md#deployment (future)
  • Android: See platforms/android/PRD-android.md#deployment (future)

16. Firebase Implementation Patterns

Key Management & Data Structure:

  • Sequential Keys: Queue items use sequential numerical keys (0, 1, 2, ...)
  • Auto-initialization: Empty controller structure created if none exists
  • Key Cleanup: Inconsistent keys automatically migrated to sequential format
  • Order Validation: Queue order automatically fixed on every update

Real-time Synchronization:

  • Initial Load: Complete controller object loaded on connection
  • Incremental Updates: Specific child nodes updated for efficiency
  • Connection Monitoring: Real-time connection status tracking
  • Retry Logic: Automatic retry for failed operations

Data Validation:

  • Type Safety: All data validated against TypeScript interfaces
  • Required Fields: Critical fields validated before Firebase writes
  • Duplicate Prevention: Songs identified by path field
  • Order Validation: Queue order automatically fixed

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#firebase-patterns for React/Ionic implementation
  • iOS: See platforms/ios/PRD-ios.md#firebase-patterns (future)
  • Android: See platforms/android/PRD-android.md#firebase-patterns (future)

17. Critical Implementation Notes

DO NOT CHANGE These Patterns:

  • Sequential Queue Keys: Must always use 0, 1, 2, ... for queue items
  • Firebase Structure: Controller object structure must remain unchanged
  • Data Validation: All data must be validated against TypeScript interfaces
  • Business Logic: Core rules must be enforced client-side
  • Real-time Sync: All clients must stay synchronized via Firebase

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#critical-notes for React/Ionic specifics
  • iOS: See platforms/ios/PRD-ios.md#critical-notes (future)
  • Android: See platforms/android/PRD-android.md#critical-notes (future)

18. Environment Configuration & .env.local Setup

Core Configuration Requirements:

  • Firebase Configuration: API keys and project settings
  • Environment Variables: Platform-specific configuration
  • Development vs Production: Different settings for different environments

Platform Implementation:

  • Web: See platforms/web/PRD-web.md#environment-setup for React/Ionic configuration
  • iOS: See platforms/ios/PRD-ios.md#environment-setup (future)
  • Android: See platforms/android/PRD-android.md#environment-setup (future)

19. Implementation Guide for New Projects

Quick Start Questions for Implementation:

1. Platform Choice:

  • What platform are you building for? (Web, iOS, Android, Desktop)
  • What framework will you use? (React, Vue, SwiftUI, Jetpack Compose, etc.)
  • What UI library will you use? (Ionic, Material-UI, native components, etc.)

2. State Management:

  • How will you manage state? (Redux, Context API, Zustand, native state management)
  • How will you handle real-time updates? (Firebase listeners, WebSockets, etc.)

3. Data Flow:

  • How will you structure your data layer? (Services, repositories, etc.)
  • How will you handle Firebase integration? (Direct SDK, abstraction layer, etc.)

4. UI/UX:

  • How will you implement the UI? (Components, layouts, navigation)
  • How will you handle responsive design? (Mobile-first, adaptive layouts, etc.)

5. Performance:

  • How will you optimize performance? (Memoization, lazy loading, etc.)
  • How will you handle large datasets? (Pagination, virtualization, etc.)

6. Testing:

  • How will you test your implementation? (Unit tests, integration tests, etc.)
  • How will you validate business logic? (Test coverage, validation tests, etc.)

7. Deployment:

  • How will you deploy your app? (Build tools, hosting, app stores, etc.)
  • How will you manage environments? (Development, staging, production)

Implementation Checklist:

Phase 1: Foundation

  • Set up project structure and dependencies
  • Configure Firebase project and environment
  • Implement data models and TypeScript interfaces
  • Set up state management architecture
  • Create basic UI components and layout

Phase 2: Core Features

  • Implement authentication and user management
  • Create Firebase service layer
  • Build queue management functionality
  • Implement search and song browsing
  • Add favorites and history tracking

Phase 3: Advanced Features

  • Implement real-time synchronization
  • Add admin controls and permissions
  • Build singer management system
  • Create settings and configuration
  • Implement error handling and resilience

Phase 4: Polish & Optimization

  • Add performance optimizations
  • Implement comprehensive testing
  • Add accessibility features
  • Optimize for different screen sizes
  • Prepare for deployment

Phase 5: Deployment & Launch

  • Set up production environment
  • Configure build and deployment pipeline
  • Perform final testing and validation
  • Deploy to target platform
  • Monitor and maintain

Critical Success Factors:

  • Follow the Firebase structure exactly as defined
  • Implement all business logic client-side
  • Maintain real-time synchronization across all clients
  • Validate all data against TypeScript interfaces
  • Test thoroughly before deployment

Platform-Specific Guidance:

  • Web: See platforms/web/PRD-web.md for React/Ionic implementation details
  • iOS: See platforms/ios/PRD-ios.md for Swift/SwiftUI implementation (future)
  • Android: See platforms/android/PRD-android.md for Kotlin/Jetpack Compose implementation (future)

This document contains platform-agnostic business logic and Firebase architecture. For platform-specific implementation details, see the corresponding platform PRD in the platforms/ folder.