touch

#!/bin/bash

verbosity=$(echo "$@" | grep -q '.-v'; echo "${PIPESTATUS[1]}")
if [[ $verbosity = 0 ]]; then
    verbose=true
else
    verbose=false
fi

helptext(){
    echo "Touch-Input control"
    echo -e "USAGE:\ttouch [OPTIONS]"
    echo -e "OPTIONS:"
    echo -e "\t-m [Absolute|Relative]\tset input mode to absolute or relative"
    echo -e "\t-t [time]\t\tdefine popup duration in [seconds]" 
    echo -e "\t-d [DISPLAY]\t\tset output display to map touch\n\t\t\t\tinput to (e.g. LVDS-1)"
    echo -e "\t-q\t\t\tDisable popup message"
    echo -e "\t-v\t\t\tverbose"
    echo -e "\t-h\t\t\tPrint this help message."
}

explain(){
    if [[ $verbose = true ]]; then
        echo "$@"
    fi
}

get_displays(){
    displays_found=""
    while read disp; do
        grepstring="-e $disp"
        displays_found="$displays_found $grepstring"
    done < <(xrandr --listmonitors | awk '{print $NF}' | tail -n +2)
    echo "$displays_found"
}


xct(){
    explain "Detect the name of the display in use"
    local display=":$(ls /tmp/.X11-unix/* | sed 's#/tmp/.X11-unix/X##' | head -n 1)"
    explain "Display: $display"
    explain "executing command $@"
    sudo -u kallefornia env -i DISPLAY=${display} DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus /bin/bash -c "$@"
}

explain "setting default variables:"
popup_duration=5
output_display="LVDS-1"
mode="absolute"
sleep_time=0
quiet=false
explain "popup_duration=$popup_duration"
explain "output_display=$output_display"
explain "mode=$mode"
explain "quiet=$quiet"
explain "verbose=$verbose"

explain "checking for command options"

while getopts m:t:d:s:vqh flags; do
    case $flags in
        m)
            explain "matched option '-m', checking if arguments are valid..."
            mode_match=$(echo $OPTARG | grep -q -e Relative -e Absolute; echo ${PIPESTATUS[1]})
            explain "check returned the following result: $mode_match"
            if [[ $mode_match = 0 ]]; then
                 mode="$OPTARG"
                 explain "mode set to $mode"
            else
                echo -e "\tError: option '-m' must be followed by"
                echo -e "\t'Absolute' or 'Relative'"
                exit 1
            fi
            ;;
        t)
            explain "matched option '-t'"
            popup_duration="$OPTARG"
            explain "setting popup_duration to $popup_duration, checking if arguments are valid..."
            re_isanum='^[0-9]+$'                # Regex: match whole numbers only
            if ! [[ $popup_duration =~ $re_isanum ]] ; then   # if $TIMES not whole:
                echo -e "\tError:\t-t <NUMBER> must be a positive, whole number."
                exit 1
            elif [[ popup_duration = ? ]]; then
                echo -e "\tError:\t-t <NUMBER> not recognised, setting to default"
                echo -e "\t\t(5 seconds)"
                popup_duration=5
            fi
            ;;
        d)
            explain "matched option '-d', looking for available displays"
            disp_grep=$(get_displays)
            explain "found these displays to check argument against: $disp_grep"
            explain "checking if arguments are valid..."
            display_match=$(echo $OPTARG | grep -iq $disp_grep; echo ${PIPESTATUS[1]})
            explain "check returned the following result: $display_match"
            if [[ $display_match = 0 ]]; then
                 output_display="$OPTARG"
                 explain "output_display set to $output_display"
            else
                disp_help="$(echo $disp_grep | sed 's/-e//g')"
                echo -e "\tError: option '-d' must be followed by"
                echo -e "\ta valid display name: [$disp_help]"
                exit 1
            fi  
            ;;
        s)
            sleep_time="$OPTARG"
            ;;
        :)
            echo -e "\tError: -$OPTARG needs an argument."
            helptext
            ;;
        v)
            explain "verbose is true"
            verbose=true
            ;;
        q)
            explain "quiet is true"
            quiet=true
            ;;
        h)
            helptext
            exit 0
            ;;
        *)
            echo -e "\tError: $@ not a valid option"
            helptext
            exit 1
            ;;
    esac
done
sleep $sleep_time
explain "running for loop for input methods (9, 10, 15)"
for id in 9 10 15; do
    explain "Mapping device no. $id to $output_display"
    xct "xsetwacom --set $id MapToOutput $output_display"
    explain "setting mode for device no $id to $mode"
    xct "xsetwacom --set $id Mode $mode"
done

if [[ $quiet = false ]]; then
    popup_duration_sec=$((popup_duration * 1000))
    explain "starting popup for $popup_duration seconds"
    xct "notify-send --expire-time=$popup_duration_sec Touch-Input 'Touch input mapped to $output_display in $mode mode.'"
fi

exit 0