Watch!

watch.sh

#!/bin/bash
# ToDo: Usage.
###
# Programs
###
ZENITY="/usr/bin/zenity"
YOUTUBEDL="/usr/local/bin/youtube-dl"
XCLIP="/usr/bin/xclip"
###
# Error Codes
###
EX_EXIT=0
EX_NO_INPUT=1
###
# Functions
###
# User-input what to watch
# Args: responseVar
function whatToWatch {
# Var name
_watch_var=$1
_clip=`$XCLIP -o`
# Input handling zenity/cli
if [ "$GUI" == "zenity" ]; then
    _what=`$ZENITY --entry --text "Watch what?" --title "Wana watch!" --entry-text "$_clip"`
    if [ ! "$?" == "0" ] || [ -z "$_what" ]; then
        $ZENITY --question --text "Exit or refresh?\nTimeout 3 seconds." --ok-label "Exit" --cancel-label "Refresh?" --timeout 3
        _ec=$?
        if [ "$_ec" == "0" ]; then
            echo "Exit."
            exit $EX_EXIT
        fi
        echo "No exit"
        _EXIT=1
    fi
else
    read -p "What to watch? [$_clip]" _what
    if [ -z "$_what" ]; then
        _what="$_clip"
    fi
fi
# Respond
eval $_watch_var="'$_what'"
}
# Try to use String as Video URL that have to be extracted.
# If it's such an URL, extracts it, if not doesn't touch it. 
# Args: stringVar responseVar
function tryAsYouTubeDL {
# Var names
stringVar=$1
responseVar=$2
# set responseVar if empty
if [ -z "$responseVar" ]; then
    responseVar=$stringVar
fi
# String input
eval "_string=\$${stringVar}"
# Try to extract
_url=`$YOUTUBEDL -g $_string`
# Determine success
if [ "$?" == 0 ]; then
    # Success, respond url
    eval $responseVar="'$_url'"
else
    # Failure, respond input string
    eval $responseVar="'$_string'"
fi
}
###
# Script
###
while true; do
    # Reset _NOEXIT
    _EXIT=0
    # User input
    whatToWatch watch
    # Exit if there was no input and should exit
    if [ -z "$watch" ]; then
        echo "Empty"
        if [ "$_EXIT" == "0" ]; then
            echo "Exit."
            exit $EX_NO_INPUT
        else
            echo "Should not exit."
            continue
        fi
    fi
    # Convert if needed
    tryAsYouTubeDL watch
    # Play
    vlc --one-instance --playlist-enqueue $watch & #
done;