add functions to icon-images.js to look up an icon from an ios icon name

Author: hawkrives

images/icon-images.js

@@ -1,6 +1,29 @@
 // @flow
 
 export const icons = {
-  oldMain: require('./about/IconTrans.png'),
-  windmill: require('../ios/AllAboutOlaf/windmill-icon/windmill.png'),
+	oldMain: require('./about/IconTrans.png'),
+	windmill: require('../ios/AllAboutOlaf/windmill-icon/windmill.png'),
+}
+
+export const defaultIcon = icons.oldMain
+
+// eslint-disable camelcase
+export const iosToNamedIconsMap: {[key: string]: $Keys<typeof icons>} = {
+	icon_type_windmill: 'windmill',
+	default: 'oldMain',
+}
+// eslint-enable camelcase
+
+export function lookup(iosIconName: $Keys<typeof iosToNamedIconsMap>): number {
+	const iconName = iosToNamedIconsMap[iosIconName]
+	if (!iconName) {
+		return defaultIcon
+	}
+
+	const icon = icons[iconName]
+	if (!icon) {
+		return defaultIcon
+	}
+
+	return icon
 }