#!/bin/bash

#Requires java installed

echo "*** SHRINKSAFE: running shrinksafe ***"

SHRINKSAFE="../thirdparty/shrinksafe/shrinksafe.jar"

echo "*** SHRINKSAFE: minifying javascript files ***"

let SOURCE_FILE_SIZES=0

let DEST_FILE_SIZES=0

shrinksafe () {

  SOURCE_DIR=$1

  for dir in $(find $SOURCE_DIR -type d); do

    for i in $(find $dir/*.js -type f); do

      echo "SHRINKSAFE: Processing $i"

      CURRENT_SOURCE_FILE_SIZE=$(stat -c%s "$i")

      let SOURCE_FILE_SIZES=$SOURCE_FILE_SIZES+$CURRENT_SOURCE_FILE_SIZE

      mv $i $i.old.js

      java -jar $SHRINKSAFE $i.old.js > $i

      if [ "$?" == "1" ]; then

        echo "*** ATTENTION ***: $i minimization failed, copying plain file"

        cp $i.old.js $i

      fi

      rm $i.old.js

      CURRENT_DEST_FILE_SIZE=$(stat -c%s "$i")

      let DEST_FILE_SIZES=$DEST_FILE_SIZES+$CURRENT_DEST_FILE_SIZE

    done

  done

}

for DEST_DIR in "$@"; do

  shrinksafe $DEST_DIR

done

let COMPRESSION_RATE=$DEST_FILE_SIZES*100/$SOURCE_FILE_SIZES

echo "*** SHRINKSAFE: Source file sizes: $SOURCE_FILE_SIZES, Dest file sizes: $DEST_FILE_SIZES"

echo "*** SHRINKSAFE: Congratulations! You achieved $COMPRESSION_RATE% compression rate!"