#!/bin/sh

## Resize given images to 2000px width and merge them into one image below each other.
## The result image quality will be reduced to hit the ~1000kb mark.
## Script was created as workaround forum upload restrictions in size and number of images.

readlink -f $1 > /dev/null 2>&1 \
    || { echo "Invalid or missing argument"; exit 1; }

for i in $@
do
    list="$list ( $i -resize 2000x )"
done

file="IMG_$(date +"%Y%m%d%M%S").jpg"
convert $list \
    -background white \
    -gravity Center \
    -smush +6 \
    -define jpeg:extent=1000kb \
    $file \
    && echo "Result: $PWD/$file ($file)"