#!/bin/sh
# Version: 15

# https://techbase.kde.org/Development/Tutorials/Localization/i18n_Build_Systems
# Based on: https://github.com/psifidotos/nowdock-plasmoid/blob/master/po/Messages.sh

DIR=`cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd`
plasmoidName=`kreadconfig5 --file="$DIR/../metadata.desktop" --group="Desktop Entry" --key="X-KDE-PluginInfo-Name"`
widgetName="${plasmoidName##*.}" # Strip namespace
website=`kreadconfig5 --file="$DIR/../metadata.desktop" --group="Desktop Entry" --key="X-KDE-PluginInfo-Website"`
bugAddress="$website"
packageRoot=".." # Root of translatable sources
projectName="plasma_applet_${plasmoidName}" # project name

#---
if [ -z "$plasmoidName" ]; then
	echo "[merge] Error: Couldn't read plasmoidName."
	exit
fi

if [ -z "$(which xgettext)" ]; then
	echo "[merge] Error: xgettext command not found. Need to install gettext"
	echo "[merge] Running 'sudo apt install gettext'"
	sudo apt install gettext
	echo "[merge] gettext installation should be finished. Going back to merging translations."
fi

#---
echo "[merge] Extracting messages"
find "${packageRoot}" -name '*.cpp' -o -name '*.h' -o -name '*.c' -o -name '*.qml' -o -name '*.js' | sort > "${DIR}/infiles.list"

xgettext \
	--from-code=UTF-8 \
	-C -kde -ci18n -ki18n:1 -ki18nc:1c,2 -ki18np:1,2 -ki18ncp:1c,2,3 -ktr2i18n:1 -kI18N_NOOP:1 \
	-kI18N_NOOP2:1c,2  -kN_:1 -kaliasLocale -kki18n:1 -kki18nc:1c,2 -kki18np:1,2 -kki18ncp:1c,2,3 \
	--files-from="infiles.list" \
	--width=200 \
	--add-location=file \
	--package-name="${widgetName}" \
	--package-version="" \
	--msgid-bugs-address="${bugAddress}" \
	-D "${packageRoot}" \
	-D "${DIR}" \
	-o "template.pot.new" \
	|| \
	{ echo "[merge] error while calling xgettext. aborting."; exit 1; }

sed -i 's/# SOME DESCRIPTIVE TITLE./'"# Translation of ${widgetName} in LANGUAGE"'/' "template.pot.new"
sed -i 's/# Copyright (C) YEAR THE PACKAGE'"'"'S COPYRIGHT HOLDER/'"# Copyright (C) $(date +%Y)"'/' "template.pot.new"

if [ -f "template.pot" ]; then
	newPotDate=`grep "POT-Creation-Date:" template.pot.new | sed 's/.\{3\}$//'`
	oldPotDate=`grep "POT-Creation-Date:" template.pot | sed 's/.\{3\}$//'`
	sed -i 's/'"${newPotDate}"'/'"${oldPotDate}"'/' "template.pot.new"
	changes=`diff "template.pot" "template.pot.new"`
	if [ ! -z "$changes" ]; then
		# There's been changes
		sed -i 's/'"${oldPotDate}"'/'"${newPotDate}"'/' "template.pot.new"
		mv "template.pot.new" "template.pot"

		addedKeys=`echo "$changes" | grep "> msgid" | cut -c 9- | sort`
		removedKeys=`echo "$changes" | grep "< msgid" | cut -c 9- | sort`
		echo ""
		echo "Added Keys:"
		echo "$addedKeys"
		echo ""
		echo "Removed Keys:"
		echo "$removedKeys"
		echo ""

	else
		# No changes
		rm "template.pot.new"
	fi
else
	# template.pot didn't already exist
	mv "template.pot.new" "template.pot"
fi

potMessageCount=`expr $(grep -Pzo 'msgstr ""\n(\n|$)' "template.pot" | grep -c 'msgstr ""')`
echo "|  Locale  |  Lines  | % Done|" > "./Status.md"
echo "|----------|---------|-------|" >> "./Status.md"
entryFormat="| %-8s | %7s | %5s |"
templateLine=`perl -e "printf(\"$entryFormat\", \"Template\", \"${potMessageCount}\", \"\")"`
echo "$templateLine" >> "./Status.md"

rm "${DIR}/infiles.list"
echo "[merge] Done extracting messages"

#---
echo "[merge] Merging messages"
catalogs=`find . -name '*.po' | sort`
for cat in $catalogs; do
	echo "[merge] $cat"
	catLocale=`basename ${cat%.*}`

	widthArg=""
	catUsesGenerator=`grep "X-Generator:" "$cat"`
	if [ -z "$catUsesGenerator" ]; then
		widthArg="--width=400"
	fi

	cp "$cat" "$cat.new"
	sed -i 's/"Content-Type: text\/plain; charset=CHARSET\\n"/"Content-Type: text\/plain; charset=UTF-8\\n"/' "$cat.new"

	msgmerge \
		${widthArg} \
		--add-location=file \
		--no-fuzzy-matching \
		-o "$cat.new" \
		"$cat.new" "${DIR}/template.pot"

	sed -i 's/# SOME DESCRIPTIVE TITLE./'"# Translation of ${widgetName} in ${catLocale}"'/' "$cat.new"
	sed -i 's/# Translation of '"${widgetName}"' in LANGUAGE/'"# Translation of ${widgetName} in ${catLocale}"'/' "$cat.new"
	sed -i 's/# Copyright (C) YEAR THE PACKAGE'"'"'S COPYRIGHT HOLDER/'"# Copyright (C) $(date +%Y)"'/' "$cat.new"

	poEmptyMessageCount=`expr $(grep -Pzo 'msgstr ""\n(\n|$)' "$cat.new" | grep -c 'msgstr ""')`
	poMessagesDoneCount=`expr $potMessageCount - $poEmptyMessageCount`
	poCompletion=`perl -e "printf(\"%d\", $poMessagesDoneCount * 100 / $potMessageCount)"`
	poLine=`perl -e "printf(\"$entryFormat\", \"$catLocale\", \"${poMessagesDoneCount}/${potMessageCount}\", \"${poCompletion}%\")"`
	echo "$poLine" >> "./Status.md"

	# mv "$cat" "$cat.old"
	mv "$cat.new" "$cat"
done

# Populate ReadMe.md
sed -i -E 's`share\/plasma\/plasmoids\/(.+)\/translate`share/plasma/plasmoids/'"${plasmoidName}"'/translate`' ./ReadMe.md
if [[ "$website" == *"github.com"* ]]; then
	sed -i -E 's`\[new issue\]\(https:\/\/github\.com\/(.+)\/(.+)\/issues\/new\)`[new issue]('"${website}"'/issues/new)`' ./ReadMe.md
fi
sed -i '/^|/ d' ./ReadMe.md # Remove status table from ReadMe
cat ./Status.md >> ./ReadMe.md
rm ./Status.md

echo "[merge] Done merging messages"