Naresh D Bhadresha nareshdb

Architecture

Offline Sync and Cache

OUTDATED

JavaScriptCore is a built-in iOS library that enables you to use JavaScript in apps alongside Objective-C and Swift. It lets developers read JavaScript from a string, execute it from Objective-C or Swift, and share data structures and functions across languages. We JavaScriptCore to share code between Web and iOS.

Intercom user_hash

Code for generating the user_hash value for Intercom's Identity verfication (Note: Identity verification was prevoiusly called Secure Mode)
Based on http://www.jokecamp.com/blog/examples-of-creating-base64-hashes-using-hmac-sha256-in-different-languages/#ruby
When creating this for mobile, the final output needs to be in lowercase (the web version accepts both upper and lower case)

Remember that your secret key should never be exposed to the public

So Javascript code below should only be used for testing unless modified and used to run on a server

	import 'dart:async';

	import 'package:firebase_database/firebase_database.dart';
	import 'package:flutter/material.dart';
	import 'package:shared_preferences/shared_preferences.dart';

	void main() {
	runApp(new MyApp());
	}

	// color - source color, which is must be replaced
	// withColor - target color
	// tolerance - value in range from 0 to 1
	func replaceColor(color:SKColor, withColor:SKColor, image:UIImage, tolerance:CGFloat) -> UIImage{

	// This function expects to get source color(color which is supposed to be replaced)
	// and target color in RGBA color space, hence we expect to get 4 color components: r, g, b, a
	assert(CGColorGetNumberOfComponents(color.CGColor) == 4 && CGColorGetNumberOfComponents(withColor.CGColor) == 4,
	"Must be RGBA colorspace")

	extension String {
	func extractURLs() -> [NSURL] {
	var urls : [NSURL] = []
	do {
	let detector = try NSDataDetector(types: NSTextCheckingType.Link.rawValue)
	detector.enumerateMatchesInString(self,
	options: [],
	range: NSMakeRange(0, text.characters.count),
	usingBlock: { (result, _, _) in
	if let match = result, url = match.URL {