Spotify API Example | Get Artist

spotify-get-artist.sh

#!/usr/bin/env bash
 
# Learn More About Spotify API
# https://developer.spotify.com/documentation/web-api/tutorials/getting-started
 
if [ -z "${SPOTIFY_CLIENT_ID}" ] || [ -z "${SPOTIFY_CLIENT_SECRET}" ]; then
  echo "SPOTIFY_CLIENT_ID and SPOTIFY_CLIENT_SECRET must be set."
  exit 1
fi

for cmd in curl jq; do
  if ! command -v $cmd &> /dev/null; then
    echo "Command $cmd could not be found"
    exit 1
  fi
done

SPOTIFY_ACCESS_TOKEN_FILE='spotify.token'

__request_spotify_access_token(){
  token_url='https://accounts.spotify.com/api/token'
  data="$(curl -X POST "${token_url}" \
       --silent \
       --header "Content-Type: application/x-www-form-urlencoded" \
       --data "grant_type=client_credentials" \
       --data "client_id=${SPOTIFY_CLIENT_ID}" \
       --data "client_secret=${SPOTIFY_CLIENT_SECRET}" \
  )"
  echo "$data" > "$SPOTIFY_ACCESS_TOKEN_FILE"
}

__read_spotify_access_token(){
  jq --raw-output .access_token "$SPOTIFY_ACCESS_TOKEN_FILE"
}

__has_error(){
  echo "$1" | jq --exit-status '.error' > /dev/null 2>&1
}

__print_error(){
  echo "$1" | jq --raw-output '.error.message'
}

__confirm_response(){
  response="$1"
  if __has_error "$response"; then
    __print_error "$response"
    exit 1
  fi
}

__request_artist_data(){
  access_token="$1"
  artist_id="$2"
  response="$(curl "https://api.spotify.com/v1/artists/${artist_id}" \
                   --silent \
                   --header "Authorization: Bearer ${access_token}" \
  )"
  __confirm_response "$response" && echo "$response"
}

__request_spotify_access_token

access_token="$(__read_spotify_access_token)"
artist_id='4Z8W4fKeB5YxbusRsdQVPb'

__request_artist_data "$access_token" "$artist_id"