icons

# Originally created by https://gist.github.com/brutella for ImageMagick
#! /bin/sh

function print_example() {
    echo "Example"
    echo "  icons ios ~/AppIcon.png ~/Icons/"
}

function print_usage() {
    echo "Usage"
    echo "  icons <ios|watch|all> in-file.png (out-dir)"
}

function command_exists() {
    if type "$1" >/dev/null 2>&1; then
        return 1
    else
        return 0
    fi
}

if command_exists "sips" == 0 ; then
    echo "sips tool not found"
    exit 1
fi

if [ "$1" = "--help" ] || [ "$1" = "-h" ] ; then
    print_usage
    exit 0
fi

PLATFORM="$1"
FILE="$2"
if [ -z "$PLATFORM" ] || [ -z "$FILE" ] ; then
    echo "Error: missing arguments"
    echo ""
    print_usage
    echo ""
    print_example
    exit 1
fi

DIR="$3"
if [ -z "$DIR" ] ; then
    DIR=$(dirname $FILE)
fi

# Create directory if needed
mkdir -p "$DIR"

if [ "$PLATFORM" == "all" ] ; then
    PLATFORM="ios watch"
fi

if [[ "$PLATFORM" == *"ios"* ]] ; then # iOS
    sips -Z '120'   "${FILE}" --out "${DIR}"/iPhone@2x.png
    sips -Z '180'   "${FILE}" --out "${DIR}"/iPhone@3x.png
    sips -Z '29'     "${FILE}" --out "${DIR}"/iPadSettings.png
    sips -Z '58'     "${FILE}" --out "${DIR}"/iPadSettings@2x.png
    sips -Z '58'     "${FILE}" --out "${DIR}"/iPhoneSettings@2x.png
    sips -Z '87'     "${FILE}" --out "${DIR}"/iPhoneSettings@3x.png
    sips -Z '40'     "${FILE}" --out "${DIR}"/iPadSpotlight.png
    sips -Z '80'     "${FILE}" --out "${DIR}"/iPadSpotlight@2x.png
    sips -Z '80'     "${FILE}" --out "${DIR}"/iPhoneSpotlight@2x.png
    sips -Z '120'   "${FILE}" --out "${DIR}"/iPhoneSpotlight@3x.png
    sips -Z '76'     "${FILE}" --out "${DIR}"/iPad.png
    sips -Z '152'   "${FILE}" --out "${DIR}"/iPad@2x.png
fi

if [[ "$PLATFORM" == *"watch"* ]] ; then # Apple Watch
    sips -Z '48' "${FILE}" --out "${DIR}"/Watch38mmNotificationCenter.png
    sips -Z '55'   "${FILE}" --out "${DIR}"/Watch42mmNotificationCenter.png
    sips -Z '58'   "${FILE}" --out "${DIR}"/WatchCompanionSettings@2x.png
    sips -Z '87'   "${FILE}" --out "${DIR}"/WatchCompanionSettings@3x.png
    sips -Z '80'   "${FILE}" --out "${DIR}"/WatchAllHomeScreen.png
    sips -Z '88'   "${FILE}" --out "${DIR}"/WatchLongLook.png
    sips -Z '172' "${FILE}" --out "${DIR}"/Watch38MMShortLook.png
    sips -Z '196' "${FILE}" --out "${DIR}"/Watch42MMShortLook.png
fi