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