#!/usr/bin/env sh
#
# tp: "Telodendria Patch"
#
# This script is used to manage the patch queue.

if [ -f "$(pwd)/.env" ]; then
	. "$(pwd)/.env"
fi

if [ -z "$TELODENDRIA_PUB" ]; then
	echo "TELODENDRIA_PUB not set."
	exit 1
fi

TP_DIR="$TELODENDRIA_PUB/patches"

CURL="curl -s"

if [ ! -d "$TP_DIR" ]; then
	echo "$TP_DIR does not exist."
	exit 1
fi

matrix_send() {
	msg="$1"
	if [ ! -z "$msg" ]; then
		jq --null-input \
			--arg body "$msg" \
			--arg formatted_body "$msg" \
			--arg format "org.matrix.custom.html" \
			--arg msgtype "m.text" \
			'{"body":$body,"formatted_body":$formatted_body,"format":$format,"msgtype":$msgtype}' |
			$CURL -X PUT -d @- "$HOMESERVER/client/v3/rooms/$ROOM_ID/send/m.room.message/$(date +%s)?access_token=$ACCESS_TOKEN"
	fi
}

matrix_get_files() {
	$CURL "$HOMESERVER/client/v3/sync?access_token=$ACCESS_TOKEN" |
	jq ".rooms.join.\"$ROOM_ID\".timeline.events[] | select(.type==\"m.room.message\") | .content | select(.msgtype==\"m.file\") | [.body,.info.size,.url] | @tsv" |
	cut -d '"' -f 2 |
	sed 's/\\t/,/g' 
}

case "$1" in
	"ingress")
		matrix_get_files | while IFS="," read -r file size url; do
			server=$(echo "$url" | cut -d '/' -f 3)
			id=$(echo "$url" | cut -d '/' -f 4)
			ext=$(echo "$file" | rev | cut -d '.' -f 1 | rev)

			if [ "$ext" != "patch" ] || [ "$size" -gt "$MAX_SIZE" ] || [ -f "$TP_DIR/ingress/$id.patch" ]; then
				continue
			fi

			$CURL -o "$TP_DIR/ingress/$id.patch" "$HOMESERVER/media/v3/download/$server/$id"

			count=$(cat "$TP_DIR/count.txt")
			count=$((count + 1))
			cp "$TP_DIR/ingress/$id.patch" "$TP_DIR/p/$count.patch"
			(
				cd "$TP_DIR/queued"
				ln -s "../p/$count.patch" "$count.patch"
			)

			echo "$count" > "$TP_DIR/count.txt"

			matrix_send "Queued <code>$file</code> as <a href=\"https://telodendria.io/patches/p/$count.patch\">#$count</a>"
		done
		;;
	"queue")
		find "$TP_DIR/queued" -name '*.patch' | while IFS= read -r patch; do
			n=$(basename "$patch" .patch)
			echo "Patch #$n:"
			head -n3 "$patch"
			echo
		done
		;;
	"view")
		if [ -f "$TP_DIR/queued/$2.patch" ]; then
			less "$TP_DIR/queued/$2.patch"
		else
			echo "Patch #$2 doesn't exist in the queue."
			exit 1
		fi
		;;
	"apply")
		if [ -f "$TP_DIR/queued/$2.patch" ]; then
			patch < "$TP_DIR/queued/$2.patch"
		else
			echo "Patch #$2 doesn't exist in the queue."
			exit 1
		fi
		;;
	"reverse")
		if [ -f "$TP_DIR/queued/$2.patch" ]; then
			patch -R < "$TP_DIR/queued/$2.patch"
		else
			echo "Patch #$2 doesn't exist in the queue."
			exit 1
		fi
		;;
	"accept"|"reject")
		if [ -f "$TP_DIR/queued/$2.patch" ]; then
			mv "$TP_DIR/queued/$2.patch" "$TP_DIR/${1}ed/$2.patch"
			msg="Patch <a href=\"https://telodendria.io/patches/p/$2.patch\">#$2</a> was marked as ${1}ed."
			msgFile="/tmp/patchmsg-$(date +%s).txt"
			$EDITOR "$msgFile"
			if [ -f "$msgFile" ]; then
				msg="$msg<br><blockquote>$(cat $msgFile)</blockquote>"
			fi
			matrix_send "$msg"
		else
			echo "Patch #$2 doesn't exist in the queue."
			exit 1
		fi
		;;
	*)
		echo "No action specified."
		exit 1
		;;
esac