icons

#! /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 "convert" == 0 ; then
    echo "ImageMagick tool 'convert' 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 [[ "$PLATFORM" == *"ios"* ]] ; then # iOS
    convert -resize '120x120'   "${FILE}" "${DIR}"/iPhone@2x.png
    convert -resize '180x180'   "${FILE}" "${DIR}"/iPhone@3x.png
    convert -resize '29x29'     "${FILE}" "${DIR}"/iPadSettings.png
    convert -resize '58x58'     "${FILE}" "${DIR}"/iPadSettings@2x.png
    convert -resize '58x58'     "${FILE}" "${DIR}"/iPhoneSettings@2x.png
    convert -resize '87x87'     "${FILE}" "${DIR}"/iPhoneSettings@3x.png
    convert -resize '40x40'     "${FILE}" "${DIR}"/iPadSpotlight.png
    convert -resize '80x80'     "${FILE}" "${DIR}"/iPadSpotlight@2x.png
    convert -resize '80x80'     "${FILE}" "${DIR}"/iPhoneSpotlight@2x.png
    convert -resize '120x120'   "${FILE}" "${DIR}"/iPhoneSpotlight@3x.png
    convert -resize '76x76'     "${FILE}" "${DIR}"/iPad.png
    convert -resize '152x152'   "${FILE}" "${DIR}"/iPad@2x.png
fi

if [[ "$PLATFORM" == *"watch"* ]] ; then # Apple Watch
    convert -resize '48x48'   "${FILE}" "${DIR}"/Watch38mmNotificationCenter.png
    convert -resize '55x55'   "${FILE}" "${DIR}"/Watch42mmNotificationCenter.png
    convert -resize '58x58'   "${FILE}" "${DIR}"/WatchCompanionSettings@2x.png
    convert -resize '87x87'   "${FILE}" "${DIR}"/WatchCompanionSettings@3x.png
    convert -resize '80x80'   "${FILE}" "${DIR}"/WatchAllHomeScreen.png
    convert -resize '88x88'   "${FILE}" "${DIR}"/WatchLongLook.png
    convert -resize '172x172' "${FILE}" "${DIR}"/Watch38MMShortLook.png
    convert -resize '196x196' "${FILE}" "${DIR}"/Watch42MMShortLook.png
fi