tubetop2: Added a better, caching version of tubetop

Remember how I said I'd rewrite it in Python?
I lied.

tubetop2.bash

@@ -0,0 +1,128 @@
+#! /bin/bash
+#
+# tubetop2
+# Copyright (C) 2018 rehashedsalt <salt@lap-th-e560-0>
+#
+# Distributed under terms of the MIT license.
+#
+
+# Define some functions
+function tubetop2-play {
+	if [ -z ${1+x} ]; then return 1; fi
+	pkill -x xwinwrap
+	xwinwrap -ni -fs -b -nf -ov -- mpv -wid WID --title="$name" --loop-playlist=inf "$1"
+	return 0
+}
+
+function tubetop2-download {
+	if [ -z ${1+x} ]; then return 1; fi
+	videoname="$(youtube-dl -e $1)"
+	videoname="${videoname//[^ a-zA-Z0-9:\[\]|()_-]/}"
+	video="$cachedir/$videoname.mp4"
+	youtube-dl -w "$1" -f 'bestvideo[ext=mp4]+bestaudio[ext=mp4]/best[ext=mp4]' -o "$video"
+	errorcode=$?
+	if ! [ -r "$video" ]; then
+		notify-high "Download Failed" "Video $1 failed to download. youtube-dl gave error code $errorcode." "dialog-error"
+		return 2
+	fi
+	if ! [ "$errorcode" == "0" ]; then
+		notify-high "Error" "An error occured while downloading $1. youtube-dl gave error code $errorcode." "dialog-error"
+		return $errorcode
+	fi
+	notify-high "Download Finished" "\"$videoname\" is now ready to be embedded." "dialog-information"
+	return 0
+}
+
+function notify-normal {
+	if [ -z ${1+x} ] || [ -z ${2+x} ] || [ -z ${3+x} ]; then return 1; fi
+	notify-send -u low -t 3000 -i "$3" -a "$name" "$1" "$2"
+}
+
+function notify-high {
+	if [ -z ${1+x} ] || [ -z ${2+x} ] || [ -z ${3+x} ]; then return 1; fi
+	notify-send -u normal -t 10000 -i "$3" -a "$name" "$1" "$2"
+}
+
+function log {
+	if [ -z ${1+x} ] || [ -z ${2+x} ]; then return 1; fi
+	printf "$name: $1: $2\n"
+}
+
+name="$(basename $0 .bash)"
+
+# Figure out where to store the videos
+if [ -z ${XDG_DATA_HOME+x} ]; then
+	cachedir="$HOME/.local/share/$name"
+else
+	cachedir="$XDG_DATA_HOME/$name"
+fi
+log 4 "Operating out of \"$cachedir\""
+
+# Make that location if it doesn't exist
+if ! [ -d "$cachedir" ]; then
+	mkdir -p "$cachedir"
+	log 3 "Cache directory didn't exist, so it was made"
+fi
+
+# Add a symlink in the user's Videos folder, but only once
+if ! [ -f "$cachedir/.symlink" ] && [ -d "$HOME/Videos" ]; then
+	log 3 "Added symbolic link to videos in user's Videos folder"
+	ln -s "$cachedir" "$HOME/Videos/Tubetop Videos"
+	touch "$cachedir/.symlink"
+fi
+
+# If we were called with --kill, kill all running tubetops
+if [ "$1" == "--kill" ]; then
+	log 3 "Launched in kill mode. Killing xwinwrap"
+	if pkill xwinwrap; then
+		notify-high "Stopped" "Stopped playing all embedded desktop videos" "user-trash"
+		exit 0
+	else
+		log 0 "Could not find any instances of xwinwrap"
+		exit 1
+	fi
+fi
+
+# Get a list of all the videos we have
+log 3 "Getting a list of videos"
+videos=$(find "$cachedir" -type f -name \*.mp4)
+# Build a sanitized list to present to the user
+if ! [ "$videos" == "" ]; then
+	log 4 "Videos:\n$videos"
+	videos_clean=""
+	while read video; do
+		if ! [ "$videos_clean" == "" ]; then
+			videos_clean="$videos_clean"$'\n'
+		fi
+		video_name="$(basename "$video" .mp4)"
+		log 5 "Renaming \"$video\" to \"$video_name\""
+		videos_clean="$videos_clean$video_name"
+	done <<< "$videos"
+	log 4 "Videos, cleaned:\n$videos_clean"
+fi
+
+# Make a decision
+log 3 "Prompting the user..."
+choice="$(rofi -dmenu -p $name <<< "$videos_clean")"
+
+# Validate the input
+if [ "$choice" == "" ]; then
+	log 0 "User responded with empty string. Terminating."
+	exit 0
+fi
+
+log 3 "User responded with $choice"
+
+# If the decision is remote, download it. Otherwise, play it
+if ! [ -r "$cachedir/$choice.mp4" ]; then
+	log 3 "Decided to download $choice"
+	notify-normal "Downloading Video" "Video \"$choice\" is being downloaded. It will be available shortly." "drive-harddisk"
+	tubetop2-download "$choice"
+else
+	log 3 "Decided to play \"$choice\" from local files"
+	notify-normal "Playing Video" "Embedding \"$choice\" into the desktop." "computer"
+	tubetop2-play "$cachedir/$choice.mp4"
+fi
+log 0 "Quitting"
+exit 0
+