#!/usr/bin/env zsh -f
# Purpose: 	Download and install the latest version of VLC
#
# Author:	Timothy J. Luoma
# Email:	luomat at gmail dot com
# Date:		2011-10-26, verified 2018-08-07

NAME="$0:t"

INSTALL_TO='/Applications/VLC.app'

HOMEPAGE="http://www.videolan.org/vlc/"

DOWNLOAD_PAGE="http://www.videolan.org/vlc/"

SUMMARY="VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols."

if [[ -e "$HOME/.path" ]]
then
	source "$HOME/.path"
fi

if (( $+commands[lynx] ))
then

	INFO='lynx'

	BASE_URL=$(lynx -listonly -dump -nomargins -nonumbers "https://ftp.osuosl.org/pub/videolan/vlc/" | egrep '/vlc/[0-9]' | tail -1)

	LATEST_VERSION="$BASE_URL:t"

	URL=$(lynx -listonly -dump -nomargins -nonumbers "${BASE_URL}/macosx/" | egrep '/vlc-.*-universal.dmg$' | tail -1)

	FILENAME="$HOME/Downloads/$INSTALL_TO:t:r-${LATEST_VERSION}-universal.dmg"

else

	ARCH=$(sysctl kern.version | awk -F'_' '/RELEASE/{print $2}')

	if [[ "$ARCH" == "ARM64" ]]
	then
			# M1 / Apple Silicon / ARM
		XML_FEED='https://update.videolan.org/vlc/sparkle/vlc-arm64.xml'
		ARCH='arm64'

	elif [[ "$ARCH" == "X86" ]]
	then

			# Intel Mac
		XML_FEED='http://update.videolan.org/vlc/sparkle/vlc-intel64.xml'
		ARCH='intel'

	else

		echo "$NAME: 'sysctl kern.version' returned unknown arch: '$ARCH'" >>/dev/stderr
		exit 2

	fi

	# NOTE: XML_FEED does not show 'sparkle:shortVersionString' (they're identical in the app)

	INFO=($(curl -sfL "$XML_FEED" \
		| tr ' ' '\012' \
		| egrep '^(url|sparkle:version)=' \
		| tail -2 \
		| sort \
		| awk -F'"' '//{print $2}'))

	LATEST_VERSION="$INFO[1]"

	URL="$INFO[2]"

	FILENAME="$HOME/Downloads/$INSTALL_TO:t:r-${LATEST_VERSION}-${ARCH}.dmg"

fi # if lynx

if [ "$INFO" = "" -o "$LATEST_VERSION" = "" -o "$URL" = "" ]
then
	echo "$NAME: Bad data from $XML_FEED
	INFO: $INFO
	LATEST_VERSION: $LATEST_VERSION
	URL: $URL
	"

	exit 1
fi

if [[ -e "$INSTALL_TO" ]]
then

	INSTALLED_VERSION=`defaults read "$INSTALL_TO/Contents/Info" CFBundleShortVersionString`

	if [[ "$LATEST_VERSION" == "$INSTALLED_VERSION" ]]
	then
		echo "$NAME: Up-To-Date ($INSTALLED_VERSION)"
		exit 0
	fi

	autoload is-at-least

	is-at-least "$LATEST_VERSION" "$INSTALLED_VERSION"

	if [ "$?" = "0" ]
	then
		echo "$NAME: Installed version ($INSTALLED_VERSION) is ahead of official version $LATEST_VERSION"
		exit 0
	fi

	echo "$NAME: Outdated (Installed = $INSTALLED_VERSION vs Latest = $LATEST_VERSION)"

fi


if (( $+commands[lynx] ))
then

	RELEASE_NOTES_URL=`curl -sfL "$XML_FEED" \
	| egrep '<sparkle:releaseNotesLink>.*</sparkle:releaseNotesLink>' \
	| tail -1 \
	| sed 's#.*<sparkle:releaseNotesLink>##g; s#</sparkle:releaseNotesLink>.*##g;' `

	(echo "$NAME: Release Notes: " ;
		(curl -sfL "${RELEASE_NOTES_URL}" \
		 | sed '1,/<td valign="top">/d; /<\/ul>/,$d' \
		 | sed  '1,/<td valign="top">/d;' \
		 ; echo '</ul>') \
		| lynx -dump -nomargins -width=10000 -assume_charset=UTF-8 -pseudo_inlines -stdin ;
	echo "\nSource: <${RELEASE_NOTES_URL}>" ) | tee "$FILENAME:r.txt"

fi

echo "$NAME: Downloading '$URL' to '$FILENAME':"

curl --continue-at - --fail --location --output "$FILENAME" "$URL"

EXIT="$?"

	## exit 22 means 'the file was already fully downloaded'
[ "$EXIT" != "0" -a "$EXIT" != "22" ] && echo "$NAME: Download of $URL failed (EXIT = $EXIT)" && exit 0

[[ ! -e "$FILENAME" ]] && echo "$NAME: $FILENAME does not exist." && exit 0

[[ ! -s "$FILENAME" ]] && echo "$NAME: $FILENAME is zero bytes." && exit 0

echo "$NAME: Mounting $FILENAME:"

MNTPNT=$(hdiutil attach -nobrowse -plist "$FILENAME" 2>/dev/null \
	| fgrep -A 1 '<key>mount-point</key>' \
	| tail -1 \
	| sed 's#</string>.*##g ; s#.*<string>##g')

if [[ "$MNTPNT" == "" ]]
then
	echo "$NAME: MNTPNT is empty"
	exit 1
fi

if [[ -e "$INSTALL_TO" ]]
then
		# Quit app, if running
	pgrep -xq "$INSTALL_TO:t:r" \
	&& LAUNCH='yes' \
	&& osascript -e "tell application \"$INSTALL_TO:t:r\" to quit"

		# move installed version to trash
	mv -vf "$INSTALL_TO" "$HOME/.Trash/$INSTALL_TO:t:r.${INSTALLED_VERSION}_${INSTALLED_BUILD}.app"
fi

echo "$NAME: Installing '$MNTPNT/$INSTALL_TO:t' to '$INSTALL_TO': "

ditto --noqtn -v "$MNTPNT/$INSTALL_TO:t" "$INSTALL_TO"

EXIT="$?"

if [[ "$EXIT" == "0" ]]
then
	echo "$NAME: Successfully installed $INSTALL_TO"
else
	echo "$NAME: ditto failed"

	exit 1
fi

echo -n "$NAME: Unmounting $MNTPNT: " && diskutil eject "$MNTPNT"

exit 0