#! /bin/bash
####################################################
# Music Player Song Change Script
#   Handles many players at once
#   mpchange {install|prev|play|pause|stop|next} (mplayer)
# Arun Chaganty <arunchaganty@gmail.com>
####################################################
MP_PATH="~/scripts"
. $MP_PATH/mpchange.conf # Contains app-specific info

if [[ $1 == "install" ]]; then
    #Set commands
    EDIT="gconftool-2 -t string -s /apps/metacity/keybinding_commands"; 
    `$EDIT/command_1 "$MP_PATH/mpchange prev"`;
    `$EDIT/command_2 "$MP_PATH/mpchange play"`;
    `$EDIT/command_3 "$MP_PATH/mpchange pause"`;
    `$EDIT/command_4 "$MP_PATH/mpchange stop"`;
    `$EDIT/command_5 "$MP_PATH/mpchange next"`;
    #set keybinding
    EDIT="gconftool-2 -t string -s /apps/metacity/global_keybindings";
    `$EDIT/run_command_1 $PREV`;
    `$EDIT/run_command_2 $PLAY`;
    `$EDIT/run_command_3 $PAUSE`;
    `$EDIT/run_command_4 $STOP`;
    `$EDIT/run_command_5 $NEXT`;
    exit;

elif [[ $1 ==  "prev" || $1 ==  "play" || $1 ==  "pause" || $1 ==  "stop" || $1 == "next" ]]; then
    for mp in $MPLAYERS; do

        if [[ $mp[0] == "#" ]]; then continue; fi

        if [[ `pgrep $mp$` ]]; then
            "$mp"-change $1
            exit;
        fi
    done
    exit;

else [[ $1 == "help" ]];
    echo "mpchange: Music Player Track Changer";
    echo "Handles: $MPLAYERS";
    echo "usage: mpchange {install|prev|play|pause|stop|next} (mplayer)";
    exit;
fi

## Configuration file for mpchange

MPLAYERS="mocp totem banshee-1 rhythmbox audacious #listen #xmms"   #if more than one is open, it follows the order. #<name> comments out the player.

# keybindings:
PREV="<Super>z"
PLAY="<Super>x"
PAUSE="<Super>c"
STOP="<Super>v"
NEXT="<Super>b"

# app-specific bindings:
# Pretty straightforward to add too
# Just type in "<player-name> --help" in the console
# Search the output for anything relevant. Some players
# may not support this feature (eg. Rhythmbox). There
# may be other methods of doing it then.
#

function rhythmbox-change {
    case "$1" in
        prev)   # Rhythmbox's single previous goes to the beginning of the song.
            `rhythmbox-client --previous`;
            ;;
        play)   # Play doesn't really do anything when playing.
            `rhythmbox-client --play`;
            ;;
        pause)
            `rhythmbox-client --play-pause` #Similar to play-pause
            ;;
        stop)   # listen not have stop per se. Work around.
            `rhythmbox-client --pause`
            ;;
        next)
            `rhythmbox-client --next`
            ;;
        *)
            echo "rhythmbox does not have the feature: $1"
            exit
            ;;
    esac;
}
function listen-change {
    case "$1" in
        prev)   # Banshee's single previous goes to the beginning of the song.
            `listen --previous` && `listen --previous`
            ;;
        play)   # Play doesn't really do anything when playing.
            `listen --previous`;
            ;;
        pause)
            `listen --play-pause`   #Similar to play-pause
            ;;
        stop)   # listen not have stop per se. Work around.
            `listen --pause`
            ;;
        next)
            `listen --next`
            ;;
        *)
            echo "listen does not have the feature: $1"
            exit
            ;;
    esac;
}

function banshee-1-change {
    case "$1" in
        prev)   # Banshee's single previous goes to the beginning of the song.
            `banshee --previous`
            ;;
        play)   
            `banshee --play`
            ;;
        pause)
        # Oddly, this doesn't show up on the console list.
            `banshee --toggle-playing` 
            ;;
        stop)
        # After using --stop, playback continues on the *next* song.
            `banshee --pause`
            ;;
        next)
            `banshee --next`
            ;;
        *)
            echo "banshee does not have the feature: $1" exit
            ;;
    esac;
}

function audacious-change {
    case "$1" in
        prev)
            `audacious --rew`
            ;;
        play)
            `audacious --play`
            ;;
        pause)
            `audacious --play-pause`
            ;;
        stop)
            `audacious --stop`
            ;;
        next)
            `audacious --fwd`
            ;;
        *)
            echo "audacious does not have the feature $1"
            exit
            ;;

    esac;

}

function xmms-change {
    case "$1" in
        prev)
            `xmms --rew`
            ;;
        play)
            `xmms --play`
            ;;
        pause)
            `xmms --play-pause`
            ;;
        stop)
            `xmms --stop`
            ;;
        next)
            `xmms --fwd`
            ;;
        *)
            echo "xmms does not have the feature $1"
            exit
            ;;

    esac;

}


function totem-change {
    case "$1" in
        prev)
            `totem --previous`
            ;;
        play)
            `totem --play`
            ;;
        pause)
            `totem --play-pause`
            ;;
        stop)
            `totem --pause` #For some reason, totem's pause is same as stop
            ;;
        next)
            `totem --next`
            ;;
        *)
            echo "totem does not have the feature: $1"
            exit
            ;;
    esac;

}

function mocp-change {
    case "$1" in
        prev)
            `mocp --previous`
            ;;
        play)
            if [[ `mocp -i` == "State: STOP" ]]; then
                `mocp --play`;
            else
                `mocp --unpause`;
            fi
            ;;
        pause)
            `mocp --toggle-pause`
            ;;
        stop)
            `mocp --pause`  #For some reason, mocp's stop puts you back at the start of the playlist
            ;;
        next)
            `mocp --next`
            ;;
        *)
            echo "mocp does not have the feature: $1"
            exit
            ;;
    esac;
}