mprisctl

#!/bin/bash
#
# Copyright (C) 2016 barbUk
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, see <http://www.gnu.org/licenses/>.
#
set -o errexit -o pipefail -o nounset

readonly state_file=/tmp/mpris_last_player
readonly tmp_art_file=/tmp/mpris_tmp_art_file
readonly tmp_art_filename=/tmp/mpris_tmp_art_filename
action="${1:-info}"
mpris='no player detected'
artfile=

info() {
  playerctl \
    --all-players \
    --format '{{playerName}};{{status}};{{xesam:artist}};{{xesam:album}};{{xesam:title}};{{mpris:artUrl}}' \
    metadata 2>/dev/null
}

handle_art() {
  local art="$1"

  # Online art
  if [[ "$art" == "https://"* ]]; then
    if ! ([ -f "$tmp_art_filename" ] && [ -f "$tmp_art_file" ] && grep -q "$art" "$tmp_art_filename"); then
      curl --silent --output "$tmp_art_file" "$art"
      echo "$art" > "$tmp_art_filename"
    fi
    echo "$tmp_art_file"
  elif [[ "$art" == "file://"* ]]; then
    echo "${art#*file://}"
  fi
}

if ! [[ $(playerctl status 2>&1) == 'No players found' ]]; then
  case "$action" in
    'info' )
      while IFS=';' read -r player status artist album title art; do
        if [ -z "$album" ]; then
          album='n/a'
        fi
        if [ -z "$artist" ]; then
          artist='n/a'
        fi
        if [ -z "$art" ]; then
          art="file://$HOME/.dotfiles/img/default_player_icon.svg"
        fi
        if [ "$status" = Playing ]; then
          mpris="$status\n$artist\n$album\n$title\n"
          artfile="$art"
          echo "$player" > "$state_file"
        elif [ -e "$state_file" ] && [ "$(cat "$state_file")" = "$player" ]; then
          mpris="$status\n$artist\n$album\n$title\n"
          artfile="$art"
        elif [ "$mpris" = 'no player detected' ]; then
          mpris="$status\n$artist\n$album\n$title\n"
        fi
      done < <(info)

      artfile="$(handle_art "$artfile")"
      echo -e "$mpris$artfile"
    ;;
    * )
      while IFS=';' read -r player status artist album title art; do
        if [ "$status" = Playing ]; then
          playerctl --player="$player" "$action"
          mpris="$player"
          echo "$player" > "$state_file"
        fi
      done < <(info)

      if [ "$mpris" = 'no player detected' ] && [ -e "$state_file" ]; then
        if ! playerctl --player="$(cat "$state_file")" "$action" 2>/dev/null; then
          playerctl "$action"
          rm "$state_file"
        fi
      elif ! [ -e "$state_file" ]; then
        while IFS=';' read -r player status artist album title art; do
          # If we have a playing status, give it the command
          if [ "$status" = Playing ]; then
            playerctl --player="$player" "$action"
            mpris="$player"
            echo "$player" > "$state_file"
          fi
        done < <(info)

        # If after that we still don't have a player detected,
        # pass the command to the default player
        if ! [ -e "$state_file" ]; then
          playerctl "$action"
        fi
      fi
      ;;
  esac
else
    echo 'no player detected'
fi