make_links

#!/bin/bash

# find ~/Dropbox/Wallpapers -type f -exec ./make_links -x 1000 -y 1000 /Users/sanmiguel/sorted_wallpapers {} \;

# Usage: $0 <basedir> <img>
# creates a link in <basedir>/<width>x<height>/<img>
# e.g. $0 ~/wp_links ~/raw/path/to/foo.jpg
# (where foo.jpg is 1920x1080px)
# -> ln -ns ~/raw/path/to/foo.jpg ~/wp_links/1920x1080/foo.jpg
minwidth=0
minheight=0
force=""
blacklist=./blacklist

while getopts fx:X:y:Y:b: c
do
   case $c in
   f) force=-f ;;
   x) minwidth=$OPTARG ;;
   y) minheight=$OPTARG ;;
   X) maxwidth=$OPTARG ;;
   Y) maxheight=$OPTARG ;;
   b) blacklist=$OPTARG ;;
   esac
done
shift $((OPTIND-1))

basedir="$1"
img="$2"

die () {
    echo "$@" >&2
    exit 1
}

if [ -z "$basedir" ] || [ -z "$img" ]; then die "Usage: $0 <basedir> <img>"; fi
if [ ! -f "${img}" ]; then die "Image $img does not exist"; fi

# This is a little naive and doesn't allow duplicated filenames in different folders
if [ $(grep "$(basename ${img})" "$blacklist" | wc -l) -gt 0 ]; then
    die "Image $img blacklisted";
fi

get() {
    key="$1"
    from="$2"
    sips -g $key "$img" 2>&1 | grep $key | grep -v '<nil>' | awk '{print $2}'
}

width=$(get pixelWidth "$img")
height=$(get pixelHeight "$img")

if [ -z "${width}" ] || [ -z "${height}" ]; then die "${img}: no image dimensions"; fi

if [ $width -lt $minwidth ] || [ $height -lt $minheight ]; then die "${img}: too small"; fi
if [ ! -z "${maxwidth}" ] && [ $maxwidth -gt $width ]; then die "${img}: too large"; fi
if [ ! -z "${maxheight}" ] && [ $maxheight -gt $height ]; then die "${img}: too large"; fi

if [ ${width} -gt ${height} ]; then orientation=landscape; else orientation=portrait; fi

#dir=${basedir}/${orientation}/${width}x${height}
dir=${basedir}/${orientation}
link=${dir}/$(basename "$img")

[ ! -d "$dir" ] && mkdir -p $dir
if [ -z "$force" ] && [ -f "${link}" ]; then die "WARNING: File ${link} exists and is a file!" ; fi

ln -ns ${force} "${img}" "${link}"