#!/bin/bash

thumbnailsconf=${1:-${0##*/}.conf}

test -r "$thumbnailsconf" || exit 1

function set_imgsize () {

    imgsize[${#imgsize[@]}]=$1

    imgsize[${#imgsize[@]}]=$2

    imgsize[${#imgsize[@]}]=$3

}

#set_imgsize 'custom' 1656 1242

set_imgsize 'xxlarge' 1224 918

set_imgsize 'xlarge' 1008 756

set_imgsize 'large' 792 594

set_imgsize 'medium' 576 432

set_imgsize 'small' 432 324

set_imgsize 'xsmall' 240 240

if which readconf > /dev/null; then

    eval $(readconf --conf "$thumbnailsconf" --section=mysql --section=path --case-sensitive)

else

    echo readconf needed !

    echo PATH = $PATH

    echo get readconf at https://seb.lautre.net/git/seb/scripts/raw/master/readconf

    exit 1

fi

if ! which convert > /dev/null; then

    echo please install ImageMagick

    exit 1

fi

sqlcmd="select path from ${dbprefix}images \

           where id in ( \

              select distinct image_id from ${dbprefix}image_category \

                  where category_id in ( \

                      select id from ${dbprefix}categories where dir is NULL \

                  ) \

           )"

IFS=$'\n'

for file in $(mysql -N -u $dbuser -p${dbpasswd} $dbname <<< $sqlcmd); do

    format=""

    fnNoExt="${file%.*}"

    fnExt="${file##*.}"

    fnPath="${file%/*}"

    test $fnExt = 'mp4' && continue

    cmd="sudo -u www-data convert \"$site/$file\" -write mpr:image +delete "

    count=0

    for ((i=0; i<${#imgsize[@]}; i+=3)); do

        if ! test -e "${destDir}/${fnNoExt}-${imgsize[i]:0:2}.$fnExt"; then

            format+="${imgsize[i]} "

            cmd+="mpr:image -filter Lanczos -auto-orient -strip -quality 95 -interlace line -sampling-factor 4:2:2 "

            cmd+="-resize ${imgsize[i+1]}x${imgsize[i+2]} -write \"${destDir}/${fnNoExt}-${imgsize[i]:0:2}.$fnExt\" +delete "

            let count++

        fi

    done

    if test -n "$format"; then

        echo "$site/$file : $format"

        echo -n "please wait... "

        cmd=$(sed -r 's/^(.+) -write (.*) \+delete $/\1 \2/' <<< $cmd)

        eval $(echo -e nice -20 $cmd)

        for ((i=0; i<${#imgsize[@]}; i+=3)); do

            test -s "${destDir}/${fnNoExt}-${imgsize[i]:0:2}.$fnExt" || echo "missing extension ${imgsize[i]:0:2}.$fnExt"

        done

        echo "done, sleeping..."

        sleep $(( 2 + $count ))

    fi

done