# anand-nayak-git/spotify-complete-fullstack-project architecture

> Architecture diagram of the GitHub repository anand-nayak-git/spotify-complete-fullstack-project, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-25). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/anand-nayak-git/spotify-complete-fullstack-project
- Repository: https://github.com/anand-nayak-git/spotify-complete-fullstack-project

## Overview

This is a small browser-based music player backed by an Express song-catalog API. The user selects a catalog card or uses playback controls; the browser loads the selected track, updates player metadata, and supports playback, seeking, volume, and automatic next-track behavior. The API exposes the in-memory catalog, including artist filtering and lookup by ID. The HTML and stylesheet are present in the tree but were not sampled; the backend’s track-file serving behavior is not established by the sampled source.

Main entry points: [`app.js`](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/app.js) (Playback logic), [`Backend/index.js`](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/Backend/index.js) (Song API), [`spotify.html`](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/spotify.html) (Player interface), [`style.css`](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/style.css) (Player styling)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_player["Browser player"]
  node_player_ui["Player interface<br/>[spotify.html]"]
  node_player_logic["Playback logic<br/>[app.js]"]
  node_styles["Player styling<br/>[style.css]"]
end

subgraph group_service["Catalog service"]
  node_catalog_api["Song API<br/>[index.js]"]
  node_catalog["In-memory catalog<br/>[index.js]"]
end

subgraph group_media["Track assets"]
  node_track_files["Audio tracks"]
end

node_listener(("Listener"))

node_listener -->|"uses"| node_player_ui
node_player_ui -->|"events"| node_player_logic
node_player_logic -->|"fetches songs"| node_catalog_api
node_catalog_api -->|"filters or finds"| node_catalog
node_catalog -->|"returns metadata"| node_catalog_api
node_catalog_api -->|"returns JSON"| node_player_logic
node_player_logic -->|"sets audio source"| node_track_files
node_styles -->|"styles"| node_player_ui

click node_player_ui "https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/spotify.html"
click node_player_logic "https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/app.js"
click node_catalog_api "https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/Backend/index.js"
click node_catalog "https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/Backend/index.js"
click node_track_files "https://github.com/anand-nayak-git/spotify-complete-fullstack-project/tree/main/songs"
click node_styles "https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/style.css"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_player_ui,node_player_logic,node_styles toneBlue
class node_catalog_api,node_catalog toneAmber
class node_track_files toneMint
class node_listener toneIndigo
```

## Components

### Browser player

- [Player interface](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/spotify.html): `spotify.html`
- [Playback logic](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/app.js): `app.js`
- [Player styling](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/style.css): `style.css`

### Catalog service

- [Song API](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/Backend/index.js): `Backend/index.js`
- [In-memory catalog](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/blob/main/Backend/index.js): `Backend/index.js`

### Track assets

- [Audio tracks](https://github.com/anand-nayak-git/spotify-complete-fullstack-project/tree/main/songs): `songs`

### Other components

- **Listener**

## Connections

- Listener → Player interface: uses
- Player interface → Playback logic: events
- Playback logic → Song API: fetches songs
- Song API → In-memory catalog: filters or finds
- In-memory catalog → Song API: returns metadata
- Song API → Playback logic: returns JSON
- Playback logic → Audio tracks: sets audio source
- Player styling → Player interface: styles