LocalStream.ts

declare const chrome;

/***
 * Un-encrypted stream used to communicate between an extensions popup script and background script.
 */
export class LocalStream {

	/***
	 * Sends a message to the background script
	 * @param msg - The message to send
	 * @returns {Promise<T>} - Responds with the message from the `watch` method's sendResponse parameter.
	 */
	static send(msg){
		return new Promise((resolve:any, reject:any) => {
			chrome.runtime.sendMessage(msg, (response) => resolve(response))});
	}

	/***
	 * Watches for messages from the background script
	 * @param callback - A message parsing function
	 */
	static watch(callback:any) {
		chrome.runtime.onMessage.addListener(
			(request, sender, sendResponse) => {
				if(sender.id !== chrome.runtime.id) return;
				callback(request, sendResponse);
				return true;
			}
		);
	}
}

export default LocalStream;