#!/usr/bin/env bash
# vim:ts=4:sts=4:sw=4:et
#
# Author: Hari Sekhon
# Date: 2020-06-24 16:33:04 +0100 (Wed, 24 Jun 2020)
#
# https://github.com/harisekhon/bash-tools
#
# License: see accompanying Hari Sekhon LICENSE file
#
# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
# https://www.linkedin.com/in/harisekhon
#
set -euo pipefail
[ -n " ${ DEBUG :- } " ] && set -x
srcdir = " $( cd " $( dirname " ${ BASH_SOURCE [0] } " ) " && pwd ) "
# used by usage() in lib/utils.sh
# shellcheck disable=SC2034
usage_args = "<command to execute per playlist> [<spotify_user> [<curl_options>]"
# shellcheck disable=SC2034
usage_description = "
Executes a command per Spotify public playlist for a given user
The command must be quoted as the first argument and is templated, replacing the placeholders { playlist} and { playlist_id} in the command string
Useful for combining with other spotify_*.sh scripts, such as downloading all the 'Artist - Track' names or all the Spotify URIs as backups
Requires \$ SPOTIFY_USER be set in the environment or else given as the second arg
Requires \$ SPOTIFY_ID and \$ SPOTIFY_SECRET to be defined in the environment
Examples:
./spotify_foreach_playlist.sh './spotify_playlist_tracks.sh {playlist_id} > playlists/{playlist}.txt' harisekhon
./spotify_foreach_playlist.sh './spotify_playlist_tracks_uri.sh {playlist_id} > playlist-backups/{playlist}.txt' harisekhon
( see spotify_backup_playlists.sh for an even better implementation of this above one liner using this script)
Caveat: due to limitations of the Spotify API, this by default only works for public playlists. For private playlists export SPOTIFY_PRIVATE = 1 and get an interactively authorized access token for your shell to prevent repeated web authorization pop-ups:
export SPOTIFY_ACCESS_TOKEN = \" \$ ( SPOTIFY_PRIVATE = 1 \" $srcdir /spotify_api_token.sh\" ) \"
"
# shellcheck disable=SC1090
. " $srcdir /lib/utils.sh "
help_usage " $@ "
if [ $# -lt 1 ] ; then
usage
fi
command_template = " $1 "
shift || :
if [ -z " ${ SPOTIFY_ACCESS_TOKEN :- } " ] ; then
SPOTIFY_ACCESS_TOKEN = " $( " $srcdir /spotify_api_token.sh " ) "
export SPOTIFY_ACCESS_TOKEN
fi
" $srcdir /spotify_playlists.sh " " $@ " |
while read -r playlist_id playlist; do
if [ -z " ${ SPOTIFY_FOREACH_NO_PRINT_PLAYLIST_NAME :- } " ] ; then
printf '%s\t' " $playlist "
fi
# handle danger - done at playlist level not command level because we need late command evaluation in spotify_backup_playlists.sh
# this works, tested on Ke$ha playlist and `echo injected`
playlist = " ${ playlist // $/ \\ $} "
playlist = " ${ playlist // \` / } "
cmd = " ${ command_template // \{ playlist_id \} / $playlist_id } "
cmd = " ${ cmd // \{ playlist \} / $playlist } "
eval " $cmd "
if [ -z " ${ SPOTIFY_FOREACH_NO_NEWLINE :- } " ] ; then
printf '\n'
fi
done