match-song-lyrics-ios

A side project to learn SwiftUI and maintain time management discipline

Project Timeline

Feature Specs

Story: Shazam song and get lyrics

Narrative #1

As an online user listening to a song recording in a cafe
I want the app to find the song and its lyrics
So I can sing along with the music in the air

Scenarios (Acceptance criteria)

Given the user has connectivity and a song recording in the air
When the user taps the button to shazam song
Then the app should display the matched song and a button to display lyrics

Narrative #2

As an offline user listening to a song recording in a cafe
I want the app to display no internet
So I can know I should've be online

Scenarios (Acceptance criteria)

Given the user has no connectivity
When the user taps the button to shazam song
Then the app should display an error message of no connectivity

Use Cases

Shazam song Use Case

Data

• A popular song recording is playing

Primary Course (happy path):

1. Tap the logo to shazam
2. ShazamKit is working to match song
3. ShazamKit has matched a song
4. The app display the matched song

Invalid Data - Error Course (sad path):

1. No song recordings is playing or a person sings a song
2. The app displays no song matched

No Connectivity - Error Course (sad path):

1. The app displays no connectivity error

Get Lyrics Use Case

Data

• The artist and song title

Primary Course (happy path):

1. The app queries lyrics
2. The app downloads lyrics
3. The app creats a Song from valid data
4. The app displays the lyrics

Invalid Data - Error Course (sad path):

1. The app displays no lyrics found

No Connectivity - Error Course (sad path):

1. The app displays no connectivity error

Flowchart

Model Specs

Song

Property	Type
title	String
url	URL
artistNames	String

Payload Contract - Musixmatch Lyrics API

Authentication

Parameters:
- `apikey`: Your personal api key, you must use it in every API call. You can pass this parameter as `GET` parameter in your api call, like `track.get?apikey=xxx`

track.search

Search for track in musixmatch's database

GET track.search

Parameters:
- `q_track`: the song title
- `q_artist`: the song artist

200 RESPONSE

{
    "message": {
        "header": {
            "status_code": 200,
            ...
        },
        "body": {
            "track_list": [
                {
                    "track_id": 170323904,
                    "commontrack_id": 93911869,
                    "restricted": 0,
                    "explicit": 0,
                    "has_lyrics": 1,
                    "has_subtitles": 1,
                    "lyrics_id": 35772235,
                    "subtitle_id": 3532383,
                    "lyrics_copyright": "Lyrics powered by www.musixmatch.com",
                    ...
                },
                ...
            ]
        }
    }
}

track.lyrics.get

Get the lyrics for a track. Make sure fulfill country restriction you receive within every copyrighted content.

GET track.lyrics.get

Parameters:
- `commontrack_id`: the musixmatch commontrack id
- `track_isrc`: A valid ISRC identifier

200 RESPONSE

{
    "message": {
        "header": {
            "status_code": 200,
            ...
        },
        "body": {
            "lyrics": {
                "lyrics_id": 23904,
                "restricted": 0,
                "explicit": 0,
                "lyrics_body": "I know I know ....",
                "pixel_tracking_url": "https://tracking.musixmatch.com/t1.0/AMz6ed8EFA90DEsE",
                "lyrics_copyright": "Lyrics powered by www.musixmatch.com",
                "backlink_url": "https://www.musixmatch.com/lyrics/Lady-Gaga/.....",
                ...
            }
        }
    }
}

track.subtitle.get

Get the subtitle for a track. Make sure to:

• fulfill the country restriction you receive within every copyrighted content
• apply the tracking method of your choice

GET track.subtitle.get

Parameters:
- `commontrack_id`: the musixmatch commontrack id
- `subtitle_format`: the format of the subtitle (lrc, dfxp, stledu). Default to lrc
- `f_subtitle_length`: the desired length of the subtitle (seconds)
- `f_subtitle_length_max_deviation`: the maximum deviation allowed from the f_subtitle_length (seconds)

GET track.subtitle.get?commontrack_id=10074988

200 RESPONSE

{
    "message": {
        "header": {
            "status_code": 200,
            ...
        },
        "body": {
            "subtitle": {
                "subtitle_id": 18117,
                "restricted": 0,
                "subtitle_body": "[00:20:51] Heart beats fast ...",
                "pixel_tracking_url": "https://tracking.musixmatch.com/t1.0/AMz6ed8EFA90DEsE",
                "lyrics_copyright": "Lyrics powered by www.musixmatch.com"
            }
        }
    }
}

App Architecture

[TBA]