#!/bin/bash

DIRECTORY=$1
EXTENSION=$2

TIMESTAMP=$(date "+%Y.%m.%d-%H.%M.%S")
LOG="images-$TIMESTAMP.log"
echo [$TIMESTAMP] Initialize >> $LOG

#find files by extention (jpg|png)
OCURRENCES=($(find $DIRECTORY -type f -name "*.$EXTENSION"))

for file in "${OCURRENCES[@]}"
do
	if [ $EXTENSION == "jpg" ]
	then
		jpegoptim --strip-all $file >> $LOG
	else
		optipng -o5 $file >> $LOG
	fi
done

TIMESTAMP=$(date "+%Y.%m.%d-%H.%M.%S")
echo [$TIMESTAMP] Done! >> $LOG