<?php

/**
 * Module: update_notes
 * Purpose: AJAX synchronisation of notes page
 */

use Friendica\App;
use Friendica\Core\L10n;
use Friendica\Core\PConfig;

require_once("mod/notes.php");

function update_notes_content(App $a) {

	$profile_uid = intval($_GET["p"]);

	header("Content-type: text/html");
	echo "<!DOCTYPE html><html><body>\r\n";

	echo "<section>";

	/**
	 *
	 * Grab the page inner contents by calling the content function from the profile module directly,
	 * but move any image src attributes to another attribute name. This is because
	 * some browsers will prefetch all the images for the page even if we don't need them.
	 * The only ones we need to fetch are those for new page additions, which we'll discover
	 * on the client side and then swap the image back.
	 *
	 */

	$text = notes_content($a, $profile_uid);

	$pattern = "/<img([^>]*) src=\"([^\"]*)\"/";
	$replace = "<img\${1} dst=\"\${2}\"";
	$text = preg_replace($pattern, $replace, $text);

	if (PConfig::get(local_user(), "system", "bandwidth_saver")) {
		$replace = "<br />".L10n::t("[Embedded content - reload page to view]")."<br />";
		$pattern = "/<\s*audio[^>]*>(.*?)<\s*\/\s*audio>/i";
		$text = preg_replace($pattern, $replace, $text);
		$pattern = "/<\s*video[^>]*>(.*?)<\s*\/\s*video>/i";
		$text = preg_replace($pattern, $replace, $text);
		$pattern = "/<\s*embed[^>]*>(.*?)<\s*\/\s*embed>/i";
		$text = preg_replace($pattern, $replace, $text);
		$pattern = "/<\s*iframe[^>]*>(.*?)<\s*\/\s*iframe>/i";
		$text = preg_replace($pattern, $replace, $text);
	}

	// reportedly some versions of MSIE don't handle tabs in XMLHttpRequest documents very well
	echo str_replace("\t", "       ", $text);
	echo "</section>";
	echo "</body></html>\r\n";
	killme();
}