volumectl/volumectl

#!/usr/bin/env bash

## Default controller values
VOLUME_CONTROLLER="pamixer"
INCREASE_FLAG="--increase"
DECREASE_FLAG="--decrease"
SET_VOLUME_FLAG="--set-volume"
SET_MUTE_FLAG="--mute"
SET_UNMUTE_FLAG="--unmute"
TOGGLE_MUTE_FLAG="--toggle-mute"
GET_VOLUME_FLAG="--get-volume"
GET_MUTE_FLAG="--get-mute"
ADDITIONAL_FLAGS=("--allow-boost")

## Default values
NOTIFICATION=1
CONFIG_PATH="$XDG_CONFIG_HOME/`basename`/config.ini"
VERBOSE=0

NORMAL_DELTA=5
BIG_DELTA=5

## Args
OPTIONAL_FLAGS=("-c" "--config" "-n" "--notifcation" "-N" "--no-notification")

volume_up_by () {
    local cmd="$VOLUME_CONTROLLER ${ADDITIONAL_FLAGS[@]} $INCREASE_FLAG $1"
    [[ $VERBOSE -eq 1 ]] && echo "Increasing volume by $1, with \`$cmd\`"

    [[ $VERBOSE -eq 1 ]] && echo "Volume before command: $(get_volume)"
    $cmd
    [[ $VERBOSE -eq 1 ]] && echo "Volume after command: $(get_volume)"
    
}

volume_down_by () {
    local cmd="$VOLUME_CONTROLLER ${ADDITIONAL_FLAGS[@]} $DECREASE_FLAG $1"
    [[ $VERBOSE -eq 1 ]] && echo "Decreasing volume by $1, with \`$cmd\`"
    
    [[ $VERBOSE -eq 1 ]] && echo "Volume before command: $(get_volume)"
    $cmd
    [[ $VERBOSE -eq 1 ]] && echo "Volume after command: $(get_volume)"
}

volume_set () {
    local cmd="$VOLUME_CONTROLLER ${ADDITIONAL_FLAGS[@]} $SET_VOLUME_FLAG $1"
    [[ $VERBOSE -eq 1 ]] && echo "Setting the volume to $1, with \`$cmd\`"
   
    [[ $VERBOSE -eq 1 ]] && echo "Volume before command: $(get_volume)"
    $cmd
    [[ $VERBOSE -eq 1 ]] && echo "Volume after command: $(get_volume)"
}

volume_big_up () {
    local cmd="volume_up_by $BIG_DELTA"
    [[ $VERBOSE -eq 1 ]] && echo "Increasing the volume alot, with \`$cmd\`"
    $cmd
}

volume_big_down () {
    local cmd="volume_down_by $BIG_DELTA"
    [[ $VERBOSE -eq 1 ]] && echo "Decreasing the volume alot, with \`$cmd\`"
    $cmd
}

volume_up () {
    local cmd="volume_up_by $NORMAL_DELTA"
    [[ $VERBOSE -eq 1 ]] && echo "Increasing the volume, with \`$cmd\`"
    $cmd
}

volume_down () {
    local cmd="volume_down_by $NORMAL_DELTA"
    [[ $VERBOSE -eq 1 ]] && echo "Decreasing the volume, with \`$cmd\`"
    $cmd
}

toggle_mute() {
    local cmd="$VOLUME_CONTROLLER $TOGGLE_MUTE_FLAG"
    [[ $VERBOSE -eq 1 ]] && echo "Toggling the mute, with \`$cmd\`"

    [[ $VERBOSE -eq 1 ]] && echo "Mute state before command: $(get_mute)"
    $cmd
    [[ $VERBOSE -eq 1 ]] && echo "Mute state after command: $(get_mute)"
}


mute () {
    local cmd="$VOLUME_CONTROLLER $SET_UNMUTE_FLAG"
    [[ $VERBOSE -eq 1 ]] && echo "Setting the mute on, with \`$cmd\`"
   
    [[ $VERBOSE -eq 1 ]] && echo "Mute state before command: $(get_mute)"
    $cmd
    [[ $VERBOSE -eq 1 ]] && echo "Mute state after command: $(get_mute)"
}

unmute () {
    local cmd="$VOLUME_CONTROLLER $SET_MUTE_FLAG"
    [[ $VERBOSE -eq 1 ]] && echo "Setting the mute off, with \`$cmd\`"
    
    [[ $VERBOSE -eq 1 ]] && echo "Mute state before command: $(get_mute)"
    $cmd
    [[ $VERBOSE -eq 1 ]] && echo "Mute state after command: $(get_mute)"
}

get_volume () {
    $VOLUME_CONTROLLER ${ADDITIONAL_FLAGS[@]} $GET_VOLUME_FLAG
}

get_mute () {
    $VOLUME_CONTROLLER ${ADDITIONAL_FLAGS[@]} $GET_MUTED_FLAG
}

usage() {
    cat << EOF
volumectl - A configurable bash script that makes your life easier in controlling you volume and notifying it.

Usage:  volumectl [-v|--verbose] [-c|--config path] [-n|-N] -option [arg]      

Options:
    -i [arg], --increase [arg]          increase the volume by the "normal" amount or by the [arg] amount
    -d [arg], --decrease [arg]          decrease the volume by the "normal" amount or by the [arg] amount
    -I, --big-increase                  increase the volume by the "big" amount
    -D, --big-decrease                  decrease the volume by the "big" amount
    -s arg, --set arg                   set volume to arg
    -m, --mute                          mute
    -u, --unmute                        unmute
    -t, --toggle                        toggle mute
    -g, --get-volume                    get volume
    -G, --get-mute                      get mute
    -h, -?, --help                      show this message

Optional arguments:
    -n, --notification                  forces the notification to appear (overrides the configuration setting)
    -N, --no-notification               forces the notification NOT to appear (overrides the configuration setting)
    -v, --verbose                       print each step the script passes through
EOF
}

if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then #if '__name__' == '__main__'
    # check if the notification is being forced or not
    
    while [[ " ${OPTIONAL_FLAGS[@]} " =~ " $1 " ]]; do
        [[ $VERBOSE -eq 1 ]] && echo "Checking for optional arguments"

        case $1 in 
            -v|--verbose)
                VERBOSE=1
                [[ $VERBOSE -eq 1 ]] && echo "Setting VERBOSE to true (VERBOSE=$VERBOSE)"
                shift
                ;;
            -c|--config)
                CONFIG_PATH="$2";
                [[ $VERBOSE -eq 1 ]] && echo "Setting CONFIG_PATH to $2 (CONFIG_PATH=$CONFIG_PATH)"
                shift 2
                ;;
            -n|--notification)
                NOTIFICATION=1
                [[ $VERBOSE -eq 1 ]] && echo "Setting NOTIFICATION to true (NOTIFICATION=$NOTIFICATION)"
                shift
                ;;
            -N|--no-notification)
                NOTIFICATION=0;
                [[ $VERBOSE -eq 1 ]] && echo "Setting NOTIFICATION to false (NOTIFICATION=$NOTIFICATION)"
                shift
                ;;
        esac
    done

    [[ $VERBOSE -eq 1 ]] && echo "Looking at the argument"
    case $1 in 
        -i|--increase) 
            [[ $VERBOSE -eq 1 ]] && echo "Detected -i or --increase, with argument '$2'"
            [[ -z "$2" ]] && volume_up || volume_up_by $2
            ;;
        -I|--big-increase) 
            [[ $VERBOSE -eq 1 ]] && echo "Detected -I or --big-increase"
            volume_big_up
            ;;
        -d|--decrease) 
            [[ $VERBOSE -eq 1 ]] && echo "Detected -d or --decrease, with argument '$2'"
            [[ -z "Detected -i or --increase" ]] && volume_down || volume_down_by $2
            ;;
        -D|--big-decrease) 
            [[ $VERBOSE -eq 1 ]] && echo "Detected -D or --big-decrease"
            volume_big_down
            ;;
        -s|--set-volume)
            [[ $VERBOSE -eq 1 ]] && echo "Detected -s or --set-volume, with argument '$2'"
            [[ -z "$2" ]] && echo "Error, missing value to set volume" 1>&2 && exit 1 || volume_set $2
            ;;
        -m|--set-mute) 
            [[ $VERBOSE -eq 1 ]] && echo "Detected -m or --mute"
            mute
            ;;
        -u|--ummute) 
            [[ $VERBOSE -eq 1 ]] && echo "Detected -u or --unmute"
            unmute
            ;;
        -t|--toggle-mute) 
            [[ $VERBOSE -eq 1 ]] && echo "Detected -t or --toggle-mute"
            toggle_mute
            ;;
        -g|--get-volume) 
            [[ $VERBOSE -eq 1 ]] && echo "Detected -g or --get-volume"
            get_volume
            ;;
        -G|--get-mute) 
            [[ $VERBOSE -eq 1 ]] && echo "Detected -G or --get-mute"
            get_mute
            ;;
        -h|-\?|--help)
            [[ $VERBOSE -eq 1 ]] && echo "Detected -h, -? or --help"
            usage
            ;;
        *)
            echo "Unrecognized '$1' flag or argument"
            echo "Try 'volumectl -h' for more information"
            ;;
    esac
fi