i3bar MPRIS control using zsh and playerctl

i3bar-mpris.zsh

mpris_bar () {
  echo '{"version":1, "click_events":true}'
  echo '['
  echo '[]'
  mpris_cur_player=0
  while :;
  do
        mpris_players=( $(playerctl -l) )
        num_of_players=$#mpris_players
        if [[ $num_of_players -eq 0 ]]; then
           echo ",[{\"full_text\":\"Nothing playing!\"}]"
           sleep 1
           continue
        fi
        let 'mpris_cur_player %= num_of_players'
        mpris_cur_player_name=${mpris_players[@]:$mpris_cur_player:1}
        mpris_status=$(playerctl -p $mpris_cur_player_name metadata -f '{{status}}: {{ duration(position) }} / {{ duration(mpris:length) }}' | tr -d '\n' | jq -Rs)
        mpris_playing=$(playerctl -p $mpris_cur_player_name status)
        mpris_loop=$(playerctl -p $mpris_cur_player_name loop)
        mpris_shuffle=$(playerctl -p $mpris_cur_player_name shuffle)
        mpris_title=$(playerctl -p $mpris_cur_player_name metadata title | tr -d '\n' | jq -Rs)
        mpris_artist=$(playerctl -p $mpris_cur_player_name metadata artist | tr -d '\n' | jq -Rs)
        mpris_album=$(playerctl -p $mpris_cur_player_name metadata album | tr -d '\n' | jq -Rs)
        #mpris_url=$(playerctl -p $mpris_cur_player_name metadata xesam:url)
        playpause_txt="play!"
        if [[ $mpris_playing = "Playing" ]] playpause_txt="pause"
        player_name_output="Player: $mpris_cur_player_name ($(($mpris_cur_player+1))/$num_of_players)"
        echo ",["
        echo "{\"name\":\"player\",\"full_text\":$(printf $player_name_output | tr -d '\n' | jq -Rs)},"
        echo "{\"name\":\"status\",\"full_text\":$mpris_status},"
        echo "{\"name\":\"title\",\"full_text\":$mpris_title},"
        echo "{\"name\":\"album\",\"full_text\":$mpris_album},"
        echo "{\"name\":\"artist\",\"full_text\":$mpris_artist},"
        echo "{\"name\":\"playpause\",\"full_text\":\"$playpause_txt\"},"
        echo "{\"name\":\"prev\",\"full_text\":\"prev\"},"
        echo "{\"name\":\"next\",\"full_text\":\"next\"},"
        echo "{\"name\":\"loop\",\"full_text\":\"loop: $mpris_loop\"},"
        echo "{\"name\":\"shuffle\",\"full_text\":\"shuffle: $mpris_shuffle\"}"
        echo "]"
        clickevent=""
	read -t 1 clickevent
        event_name=$(echo $clickevent | grep -o '{.*' | jq '.name' | grep -Eo '[^"]*')
        if [[ $event_name = "player" ]]; then
          echo $clickevent >> /tmp/cur
          mpris_players=( $(playerctl -l) )
          num_of_players=$#mpris_players
          let 'mpris_cur_player += 1'
          let 'mpris_cur_player %= num_of_players'
        fi
        if [[ $event_name = "status" ]]; then
          playerctl -p $mpris_cur_player_name play-pause
        fi
        if [[ $event_name = "playpause" ]]; then
          playerctl -p $mpris_cur_player_name play-pause
        fi
        if [[ $event_name = "prev" ]]; then
          playerctl -p $mpris_cur_player_name previous
        fi
        if [[ $event_name = "next" ]]; then
          playerctl -p $mpris_cur_player_name next
        fi
        if [[ $event_name = "loop" ]]; then
          playerctl -p $mpris_cur_player_name loop toggle
        fi
        if [[ $event_name = "shuffle" ]]; then
          playerctl -p $mpris_cur_player_name shuffle toggle
        fi

        #if [[ $event_name = "title" && ! -z $mpris_url ]]; then
        #  i3-msg exec firefox - $mpris_url
        #fi
        #if [[ $event_name = "album" && ! -z $mpris_url ]]; then
        #  i3-msg exec firefox - $mpris_url
        #fi
        #if [[ $event_name = "artist" && ! -z $mpris_url ]]; then
        #  i3-msg exec firefox - $mpris_url
        #fi
        #if [[ $event_name = "title" && ! -z $mpris_url ]]; then
        #  i3-msg exec firefox - $mpris_url
        #fi
  done
}