From: Michael <heluecht@pirati.ca>
Date: Mon, 10 Sep 2018 21:07:25 +0000 (+0000)
Subject: Activitity pub - first commit with much test code
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=0a5476591d99af6155dff047795a06da6eb9fc62;p=friendica.git

Activitity pub - first commit with much test code
---

diff --git a/src/Module/Inbox.php b/src/Module/Inbox.php
new file mode 100644
index 0000000000..86fdae7c90
--- /dev/null
+++ b/src/Module/Inbox.php
@@ -0,0 +1,47 @@
+<?php
+/**
+ * @file src/Module/Inbox.php
+ */
+namespace Friendica\Module;
+
+use Friendica\BaseModule;
+use Friendica\Database\DBA;
+use Friendica\Model\Contact;
+use Friendica\Util\HTTPSignature;
+use Friendica\Util\Network;
+
+/**
+ * ActivityPub Inbox
+ */
+class Inbox extends BaseModule
+{
+	public static function init()
+	{
+		$a = self::getApp();
+		logger('Blubb: init 1');
+
+		$postdata = file_get_contents('php://input');
+
+		$obj = json_decode($postdata);
+
+		if (empty($obj)) {
+			exit();
+		}
+
+		$tempfile = tempnam(get_temppath(), 'activitypub');
+		file_put_contents($tempfile, json_encode(['header' => $_SERVER, 'body' => $obj]));
+
+		logger('Blubb: init ' . $tempfile);
+		exit();
+//		goaway($dest);
+	}
+
+	public static function post()
+	{
+		$a = self::getApp();
+
+		logger('Blubb: post');
+		exit();
+//		goaway($dest);
+	}
+}
diff --git a/src/Protocol/ActivityPub.php b/src/Protocol/ActivityPub.php
new file mode 100644
index 0000000000..f1d885b6c6
--- /dev/null
+++ b/src/Protocol/ActivityPub.php
@@ -0,0 +1,772 @@
+<?php
+/**
+ * @file src/Protocol/ActivityPub.php
+ */
+namespace Friendica\Protocol;
+
+use Friendica\Database\DBA;
+use Friendica\Core\System;
+use Friendica\BaseObject;
+use Friendica\Util\Network;
+use Friendica\Util\HTTPSignature;
+use Friendica\Core\Protocol;
+use Friendica\Model\Item;
+use Friendica\Model\User;
+use Friendica\Util\DateTimeFormat;
+use Friendica\Util\Crypto;
+use Friendica\Content\Text\BBCode;
+
+/**
+ * @brief ActivityPub Protocol class
+ * The ActivityPub Protocol is a message exchange protocol defined by the W3C.
+ * https://www.w3.org/TR/activitypub/
+ * https://www.w3.org/TR/activitystreams-core/
+ * https://www.w3.org/TR/activitystreams-vocabulary/
+ *
+ * https://blog.joinmastodon.org/2018/06/how-to-implement-a-basic-activitypub-server/
+ * https://blog.joinmastodon.org/2018/07/how-to-make-friends-and-verify-requests/
+ */
+class ActivityPub
+{
+	const PUBLIC = 'https://www.w3.org/ns/activitystreams#Public';
+
+	public static function transmit($content, $target, $uid)
+	{
+		$owner = User::getOwnerDataById($uid);
+
+		if (!$owner) {
+			return;
+		}
+
+		$host = parse_url($target, PHP_URL_HOST);
+		$path = parse_url($target, PHP_URL_PATH);
+		$date = date('r');
+
+		$headers = ['Host: ' . $host, 'Date: ' . $date];
+
+		$signed_data = "(request-target): post " . $path . "\nhost: " . $host . "\ndate: " . $date;
+
+		$signature = base64_encode(Crypto::rsaSign($signed_data, $owner['uprvkey'], 'sha256'));
+
+		$headers[] = 'Signature: keyId="' . $owner['url'] . '#main-key' . '",headers="(request-target) host date",signature="' . $signature . '"';
+		$headers[] = 'Content-Type: application/activity+json';
+//print_r($headers);
+//die($signed_data);
+//$headers = [];
+//		$headers = HTTPSignature::createSig('', $headers, $owner['uprvkey'], $owner['url'] . '#main-key', false, false, 'sha256');
+
+		Network::post($target, $content, $headers);
+		$return_code = BaseObject::getApp()->get_curl_code();
+echo $return_code."\n";
+		print_r(BaseObject::getApp()->get_curl_headers());
+		print_r($headers);
+	}
+
+	/**
+	 * Return the ActivityPub profile of the given user
+	 *
+	 * @param integer $uid User ID
+	 * @return array
+	 */
+	public static function profile($uid)
+	{
+		$accounttype = ['Person', 'Organization', 'Service', 'Group', 'Application'];
+
+		$condition = ['uid' => $uid, 'blocked' => false, 'account_expired' => false,
+			'account_removed' => false, 'verified' => true];
+		$fields = ['guid', 'nickname', 'pubkey', 'account-type'];
+		$user = DBA::selectFirst('user', $fields, $condition);
+		if (!DBA::isResult($user)) {
+			return [];
+		}
+
+		$fields = ['locality', 'region', 'country-name'];
+		$profile = DBA::selectFirst('profile', $fields, ['uid' => $uid, 'is-default' => true]);
+		if (!DBA::isResult($profile)) {
+			return [];
+		}
+
+		$fields = ['name', 'url', 'location', 'about', 'avatar'];
+		$contact = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
+		if (!DBA::isResult($contact)) {
+			return [];
+		}
+
+		$data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1',
+			['uuid' => 'http://schema.org/identifier', 'sensitive' => 'as:sensitive',
+			'vcard' => 'http://www.w3.org/2006/vcard/ns#']]];
+
+		$data['id'] = $contact['url'];
+		$data['uuid'] = $user['guid'];
+		$data['type'] = $accounttype[$user['account-type']];
+		$data['following'] = System::baseUrl() . '/following/' . $user['nickname'];
+		$data['followers'] = System::baseUrl() . '/followers/' . $user['nickname'];
+		$data['inbox'] = System::baseUrl() . '/inbox/' . $user['nickname'];
+		$data['outbox'] = System::baseUrl() . '/outbox/' . $user['nickname'];
+		$data['preferredUsername'] = $user['nickname'];
+		$data['name'] = $contact['name'];
+		$data['vcard:hasAddress'] = ['@type' => 'Home', 'vcard:country-name' => $profile['country-name'],
+			'vcard:region' => $profile['region'], 'vcard:locality' => $profile['locality']];
+		$data['summary'] = $contact['about'];
+		$data['url'] = $contact['url'];
+		$data['manuallyApprovesFollowers'] = false;
+		$data['publicKey'] = ['id' => $contact['url'] . '#main-key',
+			'owner' => $contact['url'],
+			'publicKeyPem' => $user['pubkey']];
+		$data['endpoints'] = ['sharedInbox' => System::baseUrl() . '/inbox'];
+		$data['icon'] = ['type' => 'Image',
+			'url' => $contact['avatar']];
+
+		// tags: https://kitty.town/@inmysocks/100656097926961126.json
+		return $data;
+	}
+
+	public static function createActivityFromItem($item_id)
+	{
+		$item = Item::selectFirst([], ['id' => $item_id]);
+
+		$data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1',
+			['Emoji' => 'toot:Emoji', 'Hashtag' => 'as:Hashtag', 'atomUri' => 'ostatus:atomUri',
+			'conversation' => 'ostatus:conversation', 'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri',
+			'ostatus' => 'http://ostatus.org#', 'sensitive' => 'as:sensitive',
+			'toot' => 'http://joinmastodon.org/ns#']]];
+
+		$data['type'] = 'Create';
+		$data['id'] = $item['plink'];
+		$data['actor'] = $item['author-link'];
+		$data['to'] = 'https://www.w3.org/ns/activitystreams#Public';
+		$data['object'] = self::createNote($item);
+//		print_r($data);
+//		print_r($item);
+		return $data;
+	}
+
+	public static function createNote($item)
+	{
+		$data = [];
+		$data['type'] = 'Note';
+		$data['id'] = $item['plink'];
+		//$data['context'] = $data['conversation'] = $item['parent-uri'];
+		$data['actor'] = $item['author-link'];
+//		if (!$item['private']) {
+//			$data['to'] = [];
+//			$data['to'][] = '"https://pleroma.soykaf.com/users/heluecht"';
+			$data['to'] = 'https://www.w3.org/ns/activitystreams#Public';
+//			$data['cc'] = 'https://pleroma.soykaf.com/users/heluecht';
+//		}
+		$data['published'] = DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM);
+		$data['updated'] = DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM);
+		$data['attributedTo'] = $item['author-link'];
+		$data['title'] = BBCode::convert($item['title'], false, 7);
+		$data['content'] = BBCode::convert($item['body'], false, 7);
+		//$data['summary'] = '';
+		//$data['sensitive'] = false;
+		//$data['emoji'] = [];
+		//$data['tag'] = [];
+		//$data['attachment'] = [];
+		return $data;
+	}
+
+	/**
+	 * Fetches ActivityPub content from the given url
+	 *
+	 * @param string $url content url
+	 * @return array
+	 */
+	public static function fetchContent($url)
+	{
+		$ret = Network::curl($url, false, $redirects, ['accept_content' => 'application/activity+json']);
+
+		if (!$ret['success'] || empty($ret['body'])) {
+			return;
+		}
+
+		return json_decode($ret['body'], true);
+	}
+
+	/**
+	 * Resolves the profile url from the address by using webfinger
+	 *
+	 * @param string $addr profile address (user@domain.tld)
+	 * @return string url
+	 */
+	private static function addrToUrl($addr)
+	{
+		$addr_parts = explode('@', $addr);
+		if (count($addr_parts) != 2) {
+			return false;
+		}
+
+		$webfinger = 'https://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr);
+
+		$ret = Network::curl($webfinger, false, $redirects, ['accept_content' => 'application/jrd+json,application/json']);
+		if (!$ret['success'] || empty($ret['body'])) {
+			return false;
+		}
+
+		$data = json_decode($ret['body'], true);
+
+		if (empty($data['links'])) {
+			return false;
+		}
+
+		foreach ($data['links'] as $link) {
+			if (empty($link['href']) || empty($link['rel']) || empty($link['type'])) {
+				continue;
+			}
+
+			if (($link['rel'] == 'self') && ($link['type'] == 'application/activity+json')) {
+				return $link['href'];
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Fetches a profile from the given url
+	 *
+	 * @param string $url profile url
+	 * @return array
+	 */
+	public static function fetchProfile($url)
+	{
+		if (empty(parse_url($url, PHP_URL_SCHEME))) {
+			$url = self::addrToUrl($url);
+			if (empty($url)) {
+				return false;
+			}
+		}
+
+		$data = self::fetchContent($url);
+
+		if (empty($data) || empty($data['id']) || empty($data['inbox'])) {
+			return false;
+		}
+
+		$profile = ['network' => Protocol::ACTIVITYPUB];
+		$profile['nick'] = $data['preferredUsername'];
+		$profile['name'] = defaults($data, 'name', $profile['nick']);
+		$profile['guid'] = defaults($data, 'uuid', null);
+		$profile['url'] = $data['id'];
+		$profile['alias'] = self::processElement($data, 'url', 'href');
+
+		$parts = parse_url($profile['url']);
+		unset($parts['scheme']);
+		unset($parts['path']);
+		$profile['addr'] = $profile['nick'] . '@' . str_replace('//', '', Network::unparseURL($parts));
+
+		$profile['photo'] = self::processElement($data, 'icon', 'url');
+		$profile['about'] = defaults($data, 'summary', '');
+		$profile['batch'] = self::processElement($data, 'endpoints', 'sharedInbox');
+		$profile['pubkey'] = self::processElement($data, 'publicKey', 'publicKeyPem');
+		$profile['notify'] = $data['inbox'];
+		$profile['poll'] = $data['outbox'];
+
+		// Check if the address is resolvable
+		if (self::addrToUrl($profile['addr']) == $profile['url']) {
+			$parts = parse_url($profile['url']);
+			unset($parts['path']);
+			$profile['baseurl'] = Network::unparseURL($parts);
+		} else {
+			unset($profile['addr']);
+		}
+
+		if ($profile['url'] == $profile['alias']) {
+			unset($profile['alias']);
+		}
+
+		// Remove all "null" fields
+		foreach ($profile as $field => $content) {
+			if (is_null($content)) {
+				unset($profile[$field]);
+			}
+		}
+
+		// Handled
+		unset($data['id']);
+		unset($data['inbox']);
+		unset($data['outbox']);
+		unset($data['preferredUsername']);
+		unset($data['name']);
+		unset($data['summary']);
+		unset($data['url']);
+		unset($data['publicKey']);
+		unset($data['endpoints']);
+		unset($data['icon']);
+		unset($data['uuid']);
+
+		// To-Do
+		unset($data['type']);
+		unset($data['manuallyApprovesFollowers']);
+
+		// Unhandled
+		unset($data['@context']);
+		unset($data['tag']);
+		unset($data['attachment']);
+		unset($data['image']);
+		unset($data['nomadicLocations']);
+		unset($data['signature']);
+		unset($data['following']);
+		unset($data['followers']);
+		unset($data['featured']);
+		unset($data['movedTo']);
+		unset($data['liked']);
+		unset($data['sharedInbox']); // Misskey
+		unset($data['isCat']); // Misskey
+		unset($data['kroeg:blocks']); // Kroeg
+		unset($data['updated']); // Kroeg
+
+/*		if (!empty($data)) {
+			print_r($data);
+			die();
+		}
+*/
+		return $profile;
+	}
+
+	public static function fetchOutbox($url)
+	{
+		$data = self::fetchContent($url);
+		if (empty($data)) {
+			return;
+		}
+
+		if (!empty($data['orderedItems'])) {
+			$items = $data['orderedItems'];
+		} elseif (!empty($data['first']['orderedItems'])) {
+			$items = $data['first']['orderedItems'];
+		} elseif (!empty($data['first'])) {
+			self::fetchOutbox($data['first']);
+			return;
+		} else {
+			$items = [];
+		}
+
+		foreach ($items as $activity) {
+			self::processActivity($activity, $url);
+		}
+	}
+
+	function processActivity($activity, $url)
+	{
+		if (empty($activity['type'])) {
+			return;
+		}
+
+		if (empty($activity['object'])) {
+			return;
+		}
+
+		if (empty($activity['actor'])) {
+			return;
+		}
+
+		$actor = self::processElement($activity, 'actor', 'id');
+		if (empty($actor)) {
+			return;
+		}
+
+		if (is_string($activity['object'])) {
+			$object_url = $activity['object'];
+		} elseif (!empty($activity['object']['id'])) {
+			$object_url = $activity['object']['id'];
+		} else {
+			return;
+		}
+
+		$receivers = self::getReceivers($activity);
+		if (empty($receivers)) {
+			return;
+		}
+
+		// ----------------------------------
+		// unhandled
+		unset($activity['@context']);
+		unset($activity['id']);
+
+		// Non standard
+		unset($activity['title']);
+		unset($activity['atomUri']);
+		unset($activity['context_id']);
+		unset($activity['statusnetConversationId']);
+
+		$structure = $activity;
+
+		// To-Do?
+		unset($activity['context']);
+		unset($activity['location']);
+
+		// handled
+		unset($activity['to']);
+		unset($activity['cc']);
+		unset($activity['bto']);
+		unset($activity['bcc']);
+		unset($activity['type']);
+		unset($activity['actor']);
+		unset($activity['object']);
+		unset($activity['published']);
+		unset($activity['updated']);
+		unset($activity['instrument']);
+		unset($activity['inReplyTo']);
+
+		if (!empty($activity)) {
+			echo "Activity\n";
+			print_r($activity);
+			die($url."\n");
+		}
+
+		$activity = $structure;
+		// ----------------------------------
+
+		$item = self::fetchObject($object_url, $url);
+		if (empty($item)) {
+			return;
+		}
+
+		$item = self::addActivityFields($item, $activity);
+
+		$item['owner'] = $actor;
+
+		$item['receiver'] = array_merge($item['receiver'], $receivers);
+
+		switch ($activity['type']) {
+			case 'Create':
+			case 'Update':
+				self::createItem($item);
+				break;
+
+			case 'Announce':
+				self::announceItem($item);
+				break;
+
+			case 'Like':
+			case 'Dislike':
+				self::activityItem($item);
+				break;
+
+			case 'Follow':
+				break;
+
+			default:
+				echo "Unknown activity: ".$activity['type']."\n";
+				print_r($item);
+				die();
+				break;
+		}
+	}
+
+	private static function getReceivers($activity)
+	{
+		$receivers = [];
+
+		$elements = ['to', 'cc', 'bto', 'bcc'];
+		foreach ($elements as $element) {
+			if (empty($activity[$element])) {
+				continue;
+			}
+
+			// The receiver can be an arror or a string
+			if (is_string($activity[$element])) {
+				$activity[$element] = [$activity[$element]];
+			}
+
+			foreach ($activity[$element] as $receiver) {
+				if ($receiver == self::PUBLIC) {
+					$receivers[$receiver] = 0;
+				}
+
+				$condition = ['self' => true, 'nurl' => normalise_link($receiver)];
+				$contact = DBA::selectFirst('contact', ['id'], $condition);
+				if (!DBA::isResult($contact)) {
+					continue;
+				}
+				$receivers[$receiver] = $contact['id'];
+			}
+		}
+		return $receivers;
+	}
+
+	private static function addActivityFields($item, $activity)
+	{
+		if (!empty($activity['published']) && empty($item['published'])) {
+			$item['published'] = $activity['published'];
+		}
+
+		if (!empty($activity['updated']) && empty($item['updated'])) {
+			$item['updated'] = $activity['updated'];
+		}
+
+		if (!empty($activity['inReplyTo']) && empty($item['parent-uri'])) {
+			$item['parent-uri'] = self::processElement($activity, 'inReplyTo', 'id');
+		}
+
+		if (!empty($activity['instrument'])) {
+			$item['service'] = self::processElement($activity, 'instrument', 'name', 'Service');
+		}
+
+		// Remove all "null" fields
+		foreach ($item as $field => $content) {
+			if (is_null($content)) {
+				unset($item[$field]);
+			}
+		}
+
+		return $item;
+	}
+
+	private static function fetchObject($object_url, $url)
+	{
+		$data = self::fetchContent($object_url);
+		if (empty($data)) {
+			return false;
+		}
+
+		if (empty($data['type'])) {
+			return false;
+		} else {
+			$type = $data['type'];
+		}
+
+		if (in_array($type, ['Note', 'Article', 'Video'])) {
+			$common = self::processCommonData($data, $url);
+		}
+
+		switch ($type) {
+			case 'Note':
+				return array_merge($common, self::processNote($data, $url));
+			case 'Article':
+				return array_merge($common, self::processArticle($data, $url));
+			case 'Video':
+				return array_merge($common, self::processVideo($data, $url));
+
+			case 'Announce':
+				if (empty($data['object'])) {
+					return false;
+				}
+				return self::fetchObject($data['object'], $url);
+
+			case 'Person':
+			case 'Tombstone':
+				break;
+
+			default:
+				echo "Unknown object type: ".$data['type']."\n";
+				print_r($data);
+				die($url."\n");
+				break;
+		}
+	}
+
+	private static function processCommonData(&$object, $url)
+	{
+		if (empty($object['id']) || empty($object['attributedTo'])) {
+			return false;
+		}
+
+		$item = [];
+		$item['uri'] = $object['id'];
+
+		if (!empty($object['inReplyTo'])) {
+			$item['reply-to-uri'] = self::processElement($object, 'inReplyTo', 'id');
+		} else {
+			$item['reply-to-uri'] = $item['uri'];
+		}
+
+		$item['published'] = defaults($object, 'published', null);
+		$item['updated'] = defaults($object, 'updated', $item['published']);
+
+		if (empty($item['published']) && !empty($item['updated'])) {
+			$item['published'] = $item['updated'];
+		}
+
+		$item['uuid'] = defaults($object, 'uuid', null);
+		$item['owner'] = $item['author'] = self::processElement($object, 'attributedTo', 'id');
+		$item['context'] = defaults($object, 'context', null);
+		$item['conversation'] = defaults($object, 'conversation', null);
+		$item['sensitive'] = defaults($object, 'sensitive', null);
+		$item['name'] = defaults($object, 'name', null);
+		$item['title'] = defaults($object, 'title', null);
+		$item['content'] = defaults($object, 'content', null);
+		$item['summary'] = defaults($object, 'summary', null);
+		$item['location'] = self::processElement($object, 'location', 'name', 'Place');
+		$item['attachments'] = defaults($object, 'attachment', null);
+		$item['tags'] = defaults($object, 'tag', null);
+		$item['service'] = self::processElement($object, 'instrument', 'name', 'Service');
+		$item['alternate-url'] = self::processElement($object, 'url', 'href');
+		$item['receiver'] = self::getReceivers($object);
+
+		// handled
+		unset($object['id']);
+		unset($object['inReplyTo']);
+		unset($object['published']);
+		unset($object['updated']);
+		unset($object['uuid']);
+		unset($object['attributedTo']);
+		unset($object['context']);
+		unset($object['conversation']);
+		unset($object['sensitive']);
+		unset($object['name']);
+		unset($object['title']);
+		unset($object['content']);
+		unset($object['summary']);
+		unset($object['location']);
+		unset($object['attachment']);
+		unset($object['tag']);
+		unset($object['instrument']);
+		unset($object['url']);
+		unset($object['to']);
+		unset($object['cc']);
+		unset($object['bto']);
+		unset($object['bcc']);
+
+		// To-Do
+		unset($object['source']);
+
+		// Unhandled
+		unset($object['@context']);
+		unset($object['type']);
+		unset($object['actor']);
+		unset($object['signature']);
+		unset($object['mediaType']);
+		unset($object['duration']);
+		unset($object['replies']);
+		unset($object['icon']);
+
+		/*
+		audience, preview, endTime, startTime, generator, image
+		*/
+
+		return $item;
+	}
+
+	private static function processNote($object, $url)
+	{
+		$item = [];
+
+		// To-Do?
+		unset($object['emoji']);
+		unset($object['atomUri']);
+		unset($object['inReplyToAtomUri']);
+
+		// Unhandled
+		unset($object['contentMap']);
+		unset($object['announcement_count']);
+		unset($object['announcements']);
+		unset($object['context_id']);
+		unset($object['likes']);
+		unset($object['like_count']);
+		unset($object['inReplyToStatusId']);
+		unset($object['shares']);
+		unset($object['quoteUrl']);
+		unset($object['statusnetConversationId']);
+
+		if (empty($object))
+			return $item;
+
+		echo "Unknown Note\n";
+		print_r($object);
+		print_r($item);
+		die($url."\n");
+
+		return [];
+	}
+
+	private static function processArticle($object, $url)
+	{
+		$item = [];
+
+		if (empty($object))
+			return $item;
+
+		echo "Unknown Article\n";
+		print_r($object);
+		print_r($item);
+		die($url."\n");
+
+		return [];
+	}
+
+	private static function processVideo($object, $url)
+	{
+		$item = [];
+
+		// To-Do?
+		unset($object['category']);
+		unset($object['licence']);
+		unset($object['language']);
+		unset($object['commentsEnabled']);
+
+		// Unhandled
+		unset($object['views']);
+		unset($object['waitTranscoding']);
+		unset($object['state']);
+		unset($object['support']);
+		unset($object['subtitleLanguage']);
+		unset($object['likes']);
+		unset($object['dislikes']);
+		unset($object['shares']);
+		unset($object['comments']);
+
+		if (empty($object))
+			return $item;
+
+		echo "Unknown Video\n";
+		print_r($object);
+		print_r($item);
+		die($url."\n");
+
+		return [];
+	}
+
+	private static function processElement($array, $element, $key, $type = null)
+	{
+		if (empty($array)) {
+			return false;
+		}
+
+		if (empty($array[$element])) {
+			return false;
+		}
+
+		if (is_string($array[$element])) {
+			return $array[$element];
+		}
+
+		if (is_null($type)) {
+			if (!empty($array[$element][$key])) {
+				return $array[$element][$key];
+			}
+
+			if (!empty($array[$element][0][$key])) {
+				return $array[$element][0][$key];
+			}
+
+			return false;
+		}
+
+		if (!empty($array[$element][$key]) && !empty($array[$element]['type']) && ($array[$element]['type'] == $type)) {
+			return $array[$element][$key];
+		}
+
+		/// @todo Add array search
+
+		return false;
+	}
+
+	private static function createItem($item)
+	{
+//		print_r($item);
+	}
+
+	private static function announceItem($item)
+	{
+//		print_r($item);
+	}
+
+	private static function activityItem($item)
+	{
+	//	print_r($item);
+	}
+
+}