#!/bin/bash

# Adding a new translation string to the files for all languages.
# If you already added the string to your current language, be sure to deduplicate.

new=$(cat << 'EOD'
$wb['foo_txt'] = 'Some translation';
EOD
)

if [ -z "$1" ]; then
  echo "Usage: $0 [seek_pattern] <files>"
	echo
	echo "Add a hard coded set of new lines to a number of language files."
	echo "When the first argument is not a file it's treated as a string to search for, adding the new lines directly below it. This only supports adding a single new line though."
  exit 1
fi

if [ ! -f "$1" ]; then
  seek_pattern=$1;
  shift;
fi

for f in $*; do
  if [ "$(grep --fixed-strings "$new" $f)" ]; then
    echo "Skipping file[$f] already matches"
    continue
  fi

  if [ -n "$seek_pattern" ]; then
    # Add inplace, only a single line is supported.
    sed -i "/$seek_pattern/a\
			$new" $f
  else
    # Add at the end

    # Preserve a php close tag as the last line.
    close='?>'
    if [ "$(tail -n 1 $f)" == "$close" ]; then
      (
        head -n -1 $f;
        echo "$new";
        echo "?>";
      ) > ${f}.new

      mv ${f}.new $f

    else
      echo "$new" >> $f
    fi
  fi
done