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🎵 Spotify Web Player Frontend Design

R - Requirements (15%)​

Functional Requirements​

  • Music streaming and playback
  • Playlist management
  • Search and discovery
  • Social features (sharing, following)
  • Offline playback
  • Cross-device synchronization

Non-Functional Requirements​

  • High-quality audio streaming
  • <1s track start time
  • Support for 400M+ users
  • Real-time sync across devices

A - Architecture (20%)​

Key Components​

  • Audio Player Engine
  • Playlist Interface
  • Search & Discovery
  • Social Features
  • Cross-device Sync

D - Data Model (10%)​

interface Track {
  id: string;
  name: string;
  artist: string;
  album: string;
  duration: number;
  audioUrl: string;
  artwork: string;
}

interface Playlist {
  id: string;
  name: string;
  tracks: Track[];
  owner: string;
  isPublic: boolean;
}

I - Interface (15%)​

interface AudioPlayerProps {
  currentTrack: Track;
  isPlaying: boolean;
  volume: number;
  onPlay: () => void;
  onPause: () => void;
  onSeek: (time: number) => void;
}

interface StreamingAPI {
  getTrackStream(trackId: string, quality: string): Promise<string>;
  getPlaylist(playlistId: string): Promise<Playlist>;
}

O - Optimizations (40%)​

Audio Performance​

  • Adaptive audio quality
  • Audio preloading and buffering
  • Gapless playback
  • Web Audio API optimizations

User Experience​

  • Keyboard shortcuts
  • Media session API integration
  • Background playback
  • Cross-device sync