<?php

class UI_AjaxContent implements UITagInterface {

	/**
	 * @param string $tagName = 'p5:AjaxContent'
	 * @param array $props
	 * @param array $childrens
	 * 
	 * @return string html code
	 */
	static function h($tagName, $props = [], $childrens = []) {
		// if (empty($props['url'])) throw new Exception("Missing url!");
		// if (empty($props['url'])) throw new Exception("Missing url!");
		$idHtmlNode = self::generateUniqueID();
		$loading = V::get('loading', "Wczytywanie danych ...", $props);

		return UI::h(null, [], [
			UI::h('div', [ 'id' => $idHtmlNode ], $loading),
			UI::hScript($jsFile = __FILE__ . '.script.js', $jsonVars = [
				'ID_HTML_NODE' => $idHtmlNode,
				'URL_FETCH_CONTENT' => $props['url'],
				'LOADING' => $loading,
			]),
		]);
	}

	static function generateUniqueID() {
		static $_counter = 0;

		$_counter += 1;
		return "p5_ajax_content_{$_counter}";
	}
}