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+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * An activity
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category Feed
+ * @package StatusNet
+ * @author Evan Prodromou <evan@status.net>
+ * @author Zach Copley <zach@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
+ * @link http://status.net/
+ */
+
+if (!defined('STATUSNET')) {
+ exit(1);
+}
+
+/**
+ * A noun-ish thing in the activity universe
+ *
+ * The activity streams spec talks about activity objects, while also having
+ * a tag activity:object, which is in fact an activity object. Aaaaaah!
+ *
+ * This is just a thing in the activity universe. Can be the subject, object,
+ * or indirect object (target!) of an activity verb. Rotten name, and I'm
+ * propagating it. *sigh*
+ *
+ * @category OStatus
+ * @package StatusNet
+ * @author Evan Prodromou <evan@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
+ * @link http://status.net/
+ */
+
+class ActivityObject
+{
+ const ARTICLE = 'http://activitystrea.ms/schema/1.0/article';
+ const BLOGENTRY = 'http://activitystrea.ms/schema/1.0/blog-entry';
+ const NOTE = 'http://activitystrea.ms/schema/1.0/note';
+ const STATUS = 'http://activitystrea.ms/schema/1.0/status';
+ const FILE = 'http://activitystrea.ms/schema/1.0/file';
+ const PHOTO = 'http://activitystrea.ms/schema/1.0/photo';
+ const ALBUM = 'http://activitystrea.ms/schema/1.0/photo-album';
+ const PLAYLIST = 'http://activitystrea.ms/schema/1.0/playlist';
+ const VIDEO = 'http://activitystrea.ms/schema/1.0/video';
+ const AUDIO = 'http://activitystrea.ms/schema/1.0/audio';
+ const BOOKMARK = 'http://activitystrea.ms/schema/1.0/bookmark';
+ const PERSON = 'http://activitystrea.ms/schema/1.0/person';
+ const GROUP = 'http://activitystrea.ms/schema/1.0/group';
+ const PLACE = 'http://activitystrea.ms/schema/1.0/place';
+ const COMMENT = 'http://activitystrea.ms/schema/1.0/comment';
+ // ^^^^^^^^^^ tea!
+
+ // Atom elements we snarf
+
+ const TITLE = 'title';
+ const SUMMARY = 'summary';
+ const ID = 'id';
+ const SOURCE = 'source';
+
+ const NAME = 'name';
+ const URI = 'uri';
+ const EMAIL = 'email';
+
+ public $element;
+ public $type;
+ public $id;
+ public $title;
+ public $summary;
+ public $content;
+ public $link;
+ public $source;
+ public $avatarLinks = array();
+ public $geopoint;
+ public $poco;
+ public $displayName;
+
+ /**
+ * Constructor
+ *
+ * This probably needs to be refactored
+ * to generate a local class (ActivityPerson, ActivityFile, ...)
+ * based on the object type.
+ *
+ * @param DOMElement $element DOM thing to turn into an Activity thing
+ */
+
+ function __construct($element = null)
+ {
+ if (empty($element)) {
+ return;
+ }
+
+ $this->element = $element;
+
+ $this->geopoint = $this->_childContent(
+ $element,
+ ActivityContext::POINT,
+ ActivityContext::GEORSS
+ );
+
+ if ($element->tagName == 'author') {
+ $this->_fromAuthor($element);
+ } else if ($element->tagName == 'item') {
+ $this->_fromRssItem($element);
+ } else {
+ $this->_fromAtomEntry($element);
+ }
+
+ // Some per-type attributes...
+ if ($this->type == self::PERSON || $this->type == self::GROUP) {
+ $this->displayName = $this->title;
+
+ $photos = ActivityUtils::getLinks($element, 'photo');
+ if (count($photos)) {
+ foreach ($photos as $link) {
+ $this->avatarLinks[] = new AvatarLink($link);
+ }
+ } else {
+ $avatars = ActivityUtils::getLinks($element, 'avatar');
+ foreach ($avatars as $link) {
+ $this->avatarLinks[] = new AvatarLink($link);
+ }
+ }
+
+ $this->poco = new PoCo($element);
+ }
+ }
+
+ private function _fromAuthor($element)
+ {
+ $this->type = self::PERSON; // XXX: is this fair?
+ $this->title = $this->_childContent($element, self::NAME);
+ $this->id = $this->_childContent($element, self::URI);
+
+ if (empty($this->id)) {
+ $email = $this->_childContent($element, self::EMAIL);
+ if (!empty($email)) {
+ // XXX: acct: ?
+ $this->id = 'mailto:'.$email;
+ }
+ }
+ }
+
+ private function _fromAtomEntry($element)
+ {
+ $this->type = $this->_childContent($element, Activity::OBJECTTYPE,
+ Activity::SPEC);
+
+ if (empty($this->type)) {
+ $this->type = ActivityObject::NOTE;
+ }
+
+ $this->id = $this->_childContent($element, self::ID);
+ $this->summary = ActivityUtils::childHtmlContent($element, self::SUMMARY);
+ $this->content = ActivityUtils::getContent($element);
+
+ // We don't like HTML in our titles, although it's technically allowed
+
+ $title = ActivityUtils::childHtmlContent($element, self::TITLE);
+
+ $this->title = html_entity_decode(strip_tags($title));
+
+ $this->source = $this->_getSource($element);
+
+ $this->link = ActivityUtils::getPermalink($element);
+ }
+
+ // @fixme rationalize with Activity::_fromRssItem()
+
+ private function _fromRssItem($item)
+ {
+ $this->title = ActivityUtils::childContent($item, ActivityObject::TITLE, Activity::RSS);
+
+ $contentEl = ActivityUtils::child($item, ActivityUtils::CONTENT, Activity::CONTENTNS);
+
+ if (!empty($contentEl)) {
+ $this->content = htmlspecialchars_decode($contentEl->textContent, ENT_QUOTES);
+ } else {
+ $descriptionEl = ActivityUtils::child($item, Activity::DESCRIPTION, Activity::RSS);
+ if (!empty($descriptionEl)) {
+ $this->content = htmlspecialchars_decode($descriptionEl->textContent, ENT_QUOTES);
+ }
+ }
+
+ $this->link = ActivityUtils::childContent($item, ActivityUtils::LINK, Activity::RSS);
+
+ $guidEl = ActivityUtils::child($item, Activity::GUID, Activity::RSS);
+
+ if (!empty($guidEl)) {
+ $this->id = $guidEl->textContent;
+
+ if ($guidEl->hasAttribute('isPermaLink')) {
+ // overwrites <link>
+ $this->link = $this->id;
+ }
+ }
+ }
+
+ public static function fromRssAuthor($el)
+ {
+ $text = $el->textContent;
+
+ if (preg_match('/^(.*?) \((.*)\)$/', $text, $match)) {
+ $email = $match[1];
+ $name = $match[2];
+ } else if (preg_match('/^(.*?) <(.*)>$/', $text, $match)) {
+ $name = $match[1];
+ $email = $match[2];
+ } else if (preg_match('/.*@.*/', $text)) {
+ $email = $text;
+ $name = null;
+ } else {
+ $name = $text;
+ $email = null;
+ }
+
+ // Not really enough info
+
+ $obj = new ActivityObject();
+
+ $obj->element = $el;
+
+ $obj->type = ActivityObject::PERSON;
+ $obj->title = $name;
+
+ if (!empty($email)) {
+ $obj->id = 'mailto:'.$email;
+ }
+
+ return $obj;
+ }
+
+ public static function fromDcCreator($el)
+ {
+ // Not really enough info
+
+ $text = $el->textContent;
+
+ $obj = new ActivityObject();
+
+ $obj->element = $el;
+
+ $obj->title = $text;
+ $obj->type = ActivityObject::PERSON;
+
+ return $obj;
+ }
+
+ public static function fromRssChannel($el)
+ {
+ $obj = new ActivityObject();
+
+ $obj->element = $el;
+
+ $obj->type = ActivityObject::PERSON; // @fixme guess better
+
+ $obj->title = ActivityUtils::childContent($el, ActivityObject::TITLE, Activity::RSS);
+ $obj->link = ActivityUtils::childContent($el, ActivityUtils::LINK, Activity::RSS);
+ $obj->id = ActivityUtils::getLink($el, Activity::SELF);
+
+ if (empty($obj->id)) {
+ $obj->id = $obj->link;
+ }
+
+ $desc = ActivityUtils::childContent($el, Activity::DESCRIPTION, Activity::RSS);
+
+ if (!empty($desc)) {
+ $obj->content = htmlspecialchars_decode($desc, ENT_QUOTES);
+ }
+
+ $imageEl = ActivityUtils::child($el, Activity::IMAGE, Activity::RSS);
+
+ if (!empty($imageEl)) {
+ $obj->avatarLinks[] = ActivityUtils::childContent($imageEl, Activity::URL, Activity::RSS);
+ }
+
+ return $obj;
+ }
+
+ private function _childContent($element, $tag, $namespace=ActivityUtils::ATOM)
+ {
+ return ActivityUtils::childContent($element, $tag, $namespace);
+ }
+
+ // Try to get a unique id for the source feed
+
+ private function _getSource($element)
+ {
+ $sourceEl = ActivityUtils::child($element, 'source');
+
+ if (empty($sourceEl)) {
+ return null;
+ } else {
+ $href = ActivityUtils::getLink($sourceEl, 'self');
+ if (!empty($href)) {
+ return $href;
+ } else {
+ return ActivityUtils::childContent($sourceEl, 'id');
+ }
+ }
+ }
+
+ static function fromNotice(Notice $notice)
+ {
+ $object = new ActivityObject();
+
+ $object->type = ActivityObject::NOTE;
+
+ $object->id = $notice->uri;
+ $object->title = $notice->content;
+ $object->content = $notice->rendered;
+ $object->link = $notice->bestUrl();
+
+ return $object;
+ }
+
+ static function fromProfile(Profile $profile)
+ {
+ $object = new ActivityObject();
+
+ $object->type = ActivityObject::PERSON;
+ $object->id = $profile->getUri();
+ $object->title = $profile->getBestName();
+ $object->link = $profile->profileurl;
+
+ $orig = $profile->getOriginalAvatar();
+
+ if (!empty($orig)) {
+ $object->avatarLinks[] = AvatarLink::fromAvatar($orig);
+ }
+
+ $sizes = array(
+ AVATAR_PROFILE_SIZE,
+ AVATAR_STREAM_SIZE,
+ AVATAR_MINI_SIZE
+ );
+
+ foreach ($sizes as $size) {
+
+ $alink = null;
+ $avatar = $profile->getAvatar($size);
+
+ if (!empty($avatar)) {
+ $alink = AvatarLink::fromAvatar($avatar);
+ } else {
+ $alink = new AvatarLink();
+ $alink->type = 'image/png';
+ $alink->height = $size;
+ $alink->width = $size;
+ $alink->url = Avatar::defaultImage($size);
+ }
+
+ $object->avatarLinks[] = $alink;
+ }
+
+ if (isset($profile->lat) && isset($profile->lon)) {
+ $object->geopoint = (float)$profile->lat
+ . ' ' . (float)$profile->lon;
+ }
+
+ $object->poco = PoCo::fromProfile($profile);
+
+ return $object;
+ }
+
+ static function fromGroup($group)
+ {
+ $object = new ActivityObject();
+
+ $object->type = ActivityObject::GROUP;
+ $object->id = $group->getUri();
+ $object->title = $group->getBestName();
+ $object->link = $group->getUri();
+
+ $object->avatarLinks[] = AvatarLink::fromFilename(
+ $group->homepage_logo,
+ AVATAR_PROFILE_SIZE
+ );
+
+ $object->avatarLinks[] = AvatarLink::fromFilename(
+ $group->stream_logo,
+ AVATAR_STREAM_SIZE
+ );
+
+ $object->avatarLinks[] = AvatarLink::fromFilename(
+ $group->mini_logo,
+ AVATAR_MINI_SIZE
+ );
+
+ $object->poco = PoCo::fromGroup($group);
+
+ return $object;
+ }
+
+ function asString($tag='activity:object')
+ {
+ $xs = new XMLStringer(true);
+
+ $xs->elementStart($tag);
+
+ $xs->element('activity:object-type', null, $this->type);
+
+ $xs->element(self::ID, null, $this->id);
+
+ if (!empty($this->title)) {
+ $xs->element(
+ self::TITLE,
+ null,
+ common_xml_safe_str($this->title)
+ );
+ }
+
+ if (!empty($this->summary)) {
+ $xs->element(
+ self::SUMMARY,
+ null,
+ common_xml_safe_str($this->summary)
+ );
+ }
+
+ if (!empty($this->content)) {
+ // XXX: assuming HTML content here
+ $xs->element(
+ ActivityUtils::CONTENT,
+ array('type' => 'html'),
+ common_xml_safe_str($this->content)
+ );
+ }
+
+ if (!empty($this->link)) {
+ $xs->element(
+ 'link',
+ array(
+ 'rel' => 'alternate',
+ 'type' => 'text/html',
+ 'href' => $this->link
+ ),
+ null
+ );
+ }
+
+ if ($this->type == ActivityObject::PERSON
+ || $this->type == ActivityObject::GROUP) {
+
+ foreach ($this->avatarLinks as $avatar) {
+ $xs->element(
+ 'link', array(
+ 'rel' => 'avatar',
+ 'type' => $avatar->type,
+ 'media:width' => $avatar->width,
+ 'media:height' => $avatar->height,
+ 'href' => $avatar->url
+ ),
+ null
+ );
+ }
+ }
+
+ if (!empty($this->geopoint)) {
+ $xs->element(
+ 'georss:point',
+ null,
+ $this->geopoint
+ );
+ }
+
+ if (!empty($this->poco)) {
+ $xs->raw($this->poco->asString());
+ }
+
+ $xs->elementEnd($tag);
+
+ return $xs->getString();
+ }
+}
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