volume

#!/usr/bin/env bash


help(){
    cat<<__EOF__
    usage:  m volume [ level(0-100) | change(-n|+n) | up | down | mute | unmute | ismute ]

    Examples:
      m volume 70     # set the volume to 70 %
      m volume +5     # increase the volume by 5 (up to 100)
      m volume -10    # decrease the volume by 10 (down to 0)
      m volume up     # increase the volume by 6.25
      m volume down   # decrease the volume by 6.25
      m volume        # get the volume level
      m volume mute   # set mute
      m volume unmute # unset mute
      m volume ismute # check the volume status
__EOF__
}

mute(){
    osascript -e "set volume output muted true"
    echo "Vol, Mute: true "
}

unmute(){
    osascript -e "set volume output muted false"
    echo "Vol, Mute: false"

}

is_mute(){
    VALUE=$(osascript -e 'output muted of (get volume settings)')
    echo "Vol, is mute: ${VALUE}"
}

set_vol(){
    osascript -e "set volume output volume $1"
    echo "Vol: $1"
}

adj_vol(){
    osascript -e "set volume output volume (get output volume of (get volume settings) $1)"
    get_vol
}

get_vol(){
    VALUE=$(osascript -e "output volume of (get volume settings)")
    echo "Vol: $VALUE"
}

case $1 in
    [0-9]*)
        set_vol $1
        ;;
    +[0-9]*|-[0-9]*)
        adj_vol $1
        ;;
    up)
        adj_vol +6.25
        ;;
    down)
        adj_vol -6.25
        ;;
    mute)
        mute
        ;;
    unmute)
        unmute
        ;;
    ismute)
        is_mute
        ;;
    help)
        help
        ;;
    *)
        get_vol
        ;;
esac