#!/bin/bash

# This script is used to extract the translated app names found inevery .ts file
# and gather those strings with the .desktop.template file in a single .desktop

if [ "$#" -ne 2 ]; then
    echo "usage: $0 src_directory output.desktop"
    exit 1
fi

SRC_DIR=$1
OUTPUT_DESKTOP_FILE=$2
if [ ! -f "${SRC_DIR}/${OUTPUT_DESKTOP_FILE}.template" ]; then
    echo "${SRC_DIR}/${OUTPUT_DESKTOP_FILE}.template not found"
    exit 2
fi
if [ ! -f "${SRC_DIR}/i18n/${OUTPUT_DESKTOP_FILE}.h" ]; then
    echo "${SRC_DIR}/i18n/${OUTPUT_DESKTOP_FILE}.h not found"
    exit 2
fi

DEFAULT_NAME=`grep -oP 'QObject::tr\("\K[^"]+(?="\);)' ${SRC_DIR}/i18n/${OUTPUT_DESKTOP_FILE}.h`
if [ -z "$DEFAULT_NAME" ]; then
  echo "Default name can not be found in ${SRC_DIR}/i18n/${OUTPUT_DESKTOP_FILE}.h"
  exit 3
fi

cat ${SRC_DIR}/${OUTPUT_DESKTOP_FILE}.template > ${OUTPUT_DESKTOP_FILE}
echo "Name=$DEFAULT_NAME" >> $OUTPUT_DESKTOP_FILE

for FILE in ${SRC_DIR}/i18n/*.ts; do
  echo "Processing $FILE..."

  PROCESSED_LANG=`grep -oP 'language="\K[^"]+(?=")' $FILE`
  if [ -z "$PROCESSED_LANG" ]; then
    echo "> Couldn't find a corresponding language id, aborting"
    continue
  fi
  echo "> Language: $PROCESSED_LANG detected"

  TRANSLATION_LINE=`grep -A 2 '<location.*desktop\.h" ' $FILE | grep '<translation'`
  if [ -z "$TRANSLATION_LINE" ]; then
    echo "> Couldn't find a corresponding desktop.h translation, aborting"
    continue
  fi

  LINE_IS_UNFINISHED=`echo $TRANSLATION_LINE | grep unfinished`
  if [ ! -z "$LINE_IS_UNFINISHED" ]; then
    echo "> Translation line has been found but is marked as unfinished, aborting"
    continue
  fi

  TRANSLATED_NAME=`echo $TRANSLATION_LINE | grep -oP '>\K[^<]*(?=</translation>)'`
  if [ -z "$TRANSLATED_NAME" ]; then
    echo "> Translation is empty, aborting"
    continue
  fi
  echo "> Translation '$TRANSLATED_NAME' found, filling $OUTPUT_DESKTOP_FILE"

  echo "Name[$PROCESSED_LANG]=$TRANSLATED_NAME" >> $OUTPUT_DESKTOP_FILE
done