#!/usr/bin/env zsh -f
# Purpose: get the beta of Drafts for Mac
#
# From:	Timothy J. Luoma
# Mail:	luomat at gmail dot com
# Date:	2021-04-09

NAME="$0:t:r"

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

INSTALL_TO='/Applications/Drafts.app'

URL='https://s3-us-west-2.amazonaws.com/downloads.agiletortoise.com/Drafts.app.zip'

LATEST_VERSION=$(curl -sfLS "https://config.agiletortoise.com/drafts-mac/beta/build-status.json" \
				| awk -F'"' '/latest-version/{print $4}')

if [[ "$LATEST_VERSION" == "" ]]
then
	echo "$NAME: '\$LATEST_VERSION' is empty." >>/dev/stderr
	exit 0
fi

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

	INSTALLED_VERSION=$(defaults read "${INSTALL_TO}/Contents/Info" CFBundleVersion)

	autoload is-at-least

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

	VERSION_COMPARE="$?"

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

	echo "$NAME: Beta version $LATEST_VERSION available (Installed version: $INSTALLED_VERSION)."

	FIRST_INSTALL='no'

	if [[ -e "${INSTALL_TO}/Contents/_MASReceipt/receipt" ]]
	then

		echo "\n\tWARNING! The version of Drafts found at '$INSTALL_TO' is from the Mac App Store.\n
		'$0' can only install or update the _beta_ version of Drafts.\n
		If you wish to use the beta, you must first remove the Drafts.app from the Mac App Store.\n
		Please note that having _both_ versions installed is **HIGHLY DISCOURAGED**
		and could cause **data loss or corruption**. \n\n\tPlease don't do that." >>/dev/stderr

		exit 2
	fi

	if [[ ! -w "$INSTALL_TO" ]]
	then
		echo "$NAME: '$INSTALL_TO' exists, but you do not have 'write' access to it, therefore you cannot update it." >>/dev/stderr

		exit 2
	fi

else

	FIRST_INSTALL='yes'
fi

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

RELEASE_NOTES_TXT="$FILENAME:r.txt"

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

	cat "$RELEASE_NOTES_TXT"

else

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

		RELEASE_NOTES_URL='https://docs.getdrafts.com/beta/changelog-mac'

		RELEASE_NOTES=$(curl -sfLS "${RELEASE_NOTES_URL}" \
			| tidy 	--tidy-mark no --char-encoding utf8 --wrap 0 --show-errors 0 --indent yes \
					--input-xml no --output-xml no --quote-nbsp no --show-warnings no \
					--uppercase-attributes no --uppercase-tags no --clean yes --force-output yes \
					--join-classes yes --join-styles yes --markup yes --output-xhtml yes --quiet yes \
					--quote-ampersand yes --quote-marks yes \
			| awk '/<h3/{i++}i==1' \
			| lynx 	-dump -width='10000' -display_charset=UTF-8 -assume_charset=UTF-8 \
				-pseudo_inlines -stdin  -nomargins -nonumbers -nolist)

		echo "${RELEASE_NOTES}\n\nSource: ${RELEASE_NOTES_URL}\nVersion: ${LATEST_VERSION}\nURL: ${URL}" \
		| tee "$RELEASE_NOTES_TXT"

	fi
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: $FILENAME is zero bytes." && rm -f "$FILENAME" && exit 0

egrep -q '^Local sha256:$' "$FILENAME:r.txt" 2>/dev/null

EXIT="$?"

if [ "$EXIT" = "1" -o ! -e "$FILENAME:r.txt" ]
then
	(cd "$FILENAME:h" ; \
	echo "\n\nLocal sha256:" ; \
	shasum -a 256 "$FILENAME:t" \
	)  >>| "$FILENAME:r.txt"
fi


TEMPDIR=$(mktemp -d "${TMPDIR-/tmp/}${NAME-$0:r}-XXXXXXXX")

	## make sure that the .zip is valid before we proceed
(command unzip -l "$FILENAME" 2>&1 )>/dev/null

EXIT="$?"

if [ "$EXIT" = "0" ]
then
	echo "$NAME: '$FILENAME' is a valid zip file."

else
	echo "$NAME: '$FILENAME' is an invalid zip file (\$EXIT = $EXIT)"

	mv -fv "$FILENAME" "$TEMPDIR/"

	mv -fv "$FILENAME:r".* "$TEMPDIR/"

	exit 0

fi

	## unzip to a temporary directory
UNZIP_TO=$(mktemp -d "${TEMPDIR}/${NAME}-XXXXXXXX")

echo "$NAME: Unzipping '$FILENAME' to '$UNZIP_TO':"

ditto -xk --noqtn "$FILENAME" "$UNZIP_TO"

EXIT="$?"

if [[ "$EXIT" == "0" ]]
then
	echo "$NAME: Unzip successful"
else
		# failed
	echo "$NAME failed (ditto -xkv '$FILENAME' '$UNZIP_TO')"

	exit 1
fi

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

	pgrep -xq "$INSTALL_TO:t:r" \
	&& LAUNCH='yes' \
	&& osascript -e "tell application \"$INSTALL_TO:t:r\" to quit"

	echo "$NAME: Moving existing (old) '$INSTALL_TO' to '$TEMPDIR/'."

	mv -f "$INSTALL_TO" "$TEMPDIR/$INSTALL_TO:t:r.$INSTALLED_VERSION.app"

	EXIT="$?"

	if [[ "$EXIT" != "0" ]]
	then

		echo "$NAME: failed to move existing '$INSTALL_TO' to '$TEMPDIR'."

		exit 1
	fi
fi

echo "$NAME: Moving new version of '$INSTALL_TO:t' (from '$UNZIP_TO') to '$INSTALL_TO'."

	# Move the file out of the folder
mv -n "$UNZIP_TO/$INSTALL_TO:t" "$INSTALL_TO"

EXIT="$?"

if [[ "$EXIT" = "0" ]]
then

	echo "$NAME: Successfully installed '$UNZIP_TO/$INSTALL_TO:t' to '$INSTALL_TO'."

else
	echo "$NAME: Failed to move '$UNZIP_TO/$INSTALL_TO:t' to '$INSTALL_TO'."

	exit 1
fi

[[ "$LAUNCH" = "yes" ]] && open -a "$INSTALL_TO"

exit 0
#EOF