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package client;

import Types.VideoItem;
import js.Browser.document;
import js.Browser.window;
import js.Syntax;

private typedef VideoChangeFunc = (item:VideoItem)->Void;

class JsApi {

	static final videoChange:Array<VideoChangeFunc> = [];
	static final videoRemove:Array<VideoChangeFunc> = [];

	@:expose
	static function addPlugin(id:String, ?onLoaded:()->Void):Void {
		initPluginsSpace();
		addScriptToHead('/plugins/$id/index.js', () -> {
			final obj = {
				api: JsApi,
				id: id,
				path: '/plugins/$id'
			}
			if (untyped window.synctube[id] == null) {
				window.console.error('Plugin "$id" not found');
			} else {
				Syntax.code("new synctube[id]({0})", obj);
				if (onLoaded != null) onLoaded();
			}
		});
	}

	static function initPluginsSpace():Void {
		final w:Dynamic = window;
		if (w.synctube == null) w.synctube = {};
	}

	@:expose
	public static function addScriptToHead(url:String, ?onLoaded:()->Void):Void {
		var script = document.createScriptElement();
		script.type = "text/javascript";
		script.onload = onLoaded;
		script.src = url;
		document.head.appendChild(script);
	}

	@:expose
	static function hasScriptInHead(url:String):Bool {
		for (child in document.getElementsByTagName("head")[0].children) {
			if ((child : Dynamic).src == url) return true;
		}
		return false;
	}

	@:expose
	static function notifyOnVideoChange(func:VideoChangeFunc):Void {
		videoChange.push(func);
	}

	@:expose
	static function removeFromVideoChange(func:VideoChangeFunc):Void {
		videoChange.remove(func);
	}

	public static function fireVideoChangeEvents(item:VideoItem):Void {
		for (func in videoChange) func(item);
	}

	@:expose
	static function notifyOnVideoRemove(func:VideoChangeFunc):Void {
		videoRemove.push(func);
	}

	@:expose
	static function removeFromVideoRemove(func:VideoChangeFunc):Void {
		videoRemove.remove(func);
	}

	public static function fireVideoRemoveEvents(item:VideoItem):Void {
		for (func in videoRemove) func(item);
	}

}
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