MPV persistant ipc volume control. (WIP)

mpvctl

#!/bin/bash

# -------------------
# MPV CONTROL RELATED
function mpv_get_config()
{
    cat ${mpv_config_path} | grep $1 | cut -f2 -d'=' ||
        echo "No $1 property in config"
}
function mpv_set_config()
{
    sed -i "s/^\($1=\).*$/\1$2/" ${mpv_config_path} ||
        echo $1=$2 >> ${mpv_config_path}
}
function ipc_set_property()
{
    cmd_string='{ "command": ["set_property_string", "'$1'", "'$2'"] }'
    socat - "$mpv_ipc_path" <<< $cmd_string | grep '"error":"success"'
    return $?
}
function cmd_volume()
{
    local volume="$(mpv_get_config volume)"
    : ${volume:="50"}
    local direction=${1:0:1}
    local value="$(egrep -o [0-9]+ <<< "$1")"
    [[ -n "value" ]] || ( echo "Couldn't parse a value"; exit 1 )
    case $direction in
        +) (( volume += value )) ;;
        -) (( volume -= value )) ;;
        *) volume="$value" ;;
    esac
    ipc_set_property volume $volume &&
    mpv_set_config volume $volume &&
    echo "Volume set to $value"
}

# --------------
# PROGRAM CONFIG
function get_config()
{
    cat ${config_path} | grep $1 | cut -f2 -d'=' || echo "No $1 property in config"
}
function set_config()
{
    sed -i "s/^\($1=\).*$/\1$2/" ${config_path} ||
        echo $1=$2 >> ${config_path}
}
function find_config()
{
    local config_paths=(
        "$HOME/.mpvctlrc"
        "$HOME/config/mpv/mpvctl.conf"
        "/etc/mpvctlrc"
    )
    local broke=false
    for path in ${config_paths[@]}; do
        [ -f "$path" ] && echo "$path" && return
    done
    echo "${config_paths[1]}"
}

function main()
{
    while getopts ":a" opt; do
        case $opt in
            c) config_path="$OPTARG" ;;
            s) mpv_ipc_path="$OPTARG" ;;
            ?,h)
                echo << EOF
Usage:
    $0 [-c] [-s] command [value]
        -c  config file (default: ~/.config/mpv/mpv.conf)
        -s  socket file (default from config)
    Supported commands:
        volume [(+|-)]volume
EOF
                ;;
            \?) break ;;
        esac
        shift
    done
            
    set -e
    local cmd="cmd_$1"; shift
    : ${config_path:="$(find_config)"}
    : ${mpv_config_path:="$(echo "$(eval echo "$(get_config mpv-config)")")"}
    : ${mpv_ipc_path:="$(get_config mpv-ipc)"}
    : ${mpv_config_path:="$HOME/.config/mpv/mpv.conf"}
    : ${mpv_ipc_path:="$(mpv_get_config input-ipc-server)"}
    echo $config_path
    $cmd "$@"
}
main "$@"