#!/bin/bash
IFS="
"
#Set your parameters here
folder=/var/www/friendica
storagefolder=storage

loop_1(){
	t=$(file "${p}")
	if [[ "${t}" =~ JPEG ]]
	then
		nice -n 10 jpegoptim -m 76 "${p}" #&> /dev/null
	elif [[ "${t}" =~ GIF ]]
	then
		nice -n 10 gifsicle --batch -O3 --lossy=80 --colors=255 "${p}" #&> /dev/null
		#Specific compression for large GIF files
		while [[ $(stat -c%s "${p}" || 0) -ge 512000 ]]
		do
			nice -n 10 gifsicle "${p}" $(seq -f "#%g" 0 2 99) -O3 --lossy=80 --colors=255 -o "${p}" #&> /dev/null
		done
	elif [[ "${t}" =~ PNG ]]
	then
		nice -n 10 oxipng -o max "${p}" #&> /dev/null
	elif [[ "${p}" =~ Web/P ]]
	then
                #If file is not animated
                if [[ $(grep -v -q -e "ANIM" -e "ANMF" "${p}") ]]
                then
                        nice -n 10 cwebp -mt -af -quiet "${p}" -o /tmp/temp.webp #&> /dev/null
                        if [[ -f /tmp/temp.webp ]]
                        then
                                size_new=$(stat -c%s "/tmp/temp.webp" || 0 )
                                size_original=$(stat -c%s "${p}")
                                if [[ "${size_original}" -gt "${size_new}" ]]
                                then
                                        mv /tmp/temp.webp "${p}" #&> /dev/null
                                else
                                        rm /tmp/temp.webp #&> /dev/null
                                fi
                        fi
                fi
        fi
}

c=0
find "${folder}/${storagefolder}" -depth -mindepth 2 -type f -size +300k -not -iname "index.html" | (
	while read -r p
	do
		loop_1 "${p}" &
		until [[ $(jobs -r -p | wc -l) -lt $(( $(getconf _NPROCESSORS_ONLN) / 2 )) ]]
		do
			wait -n
		done
	done
)
wait