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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);
+}
+
+class PoCoURL
+{
+ const URLS = 'urls';
+ const TYPE = 'type';
+ const VALUE = 'value';
+ const PRIMARY = 'primary';
+
+ public $type;
+ public $value;
+ public $primary;
+
+ function __construct($type, $value, $primary = false)
+ {
+ $this->type = $type;
+ $this->value = $value;
+ $this->primary = $primary;
+ }
+
+ function asString()
+ {
+ $xs = new XMLStringer(true);
+ $xs->elementStart('poco:urls');
+ $xs->element('poco:type', null, $this->type);
+ $xs->element('poco:value', null, $this->value);
+ if (!empty($this->primary)) {
+ $xs->element('poco:primary', null, 'true');
+ }
+ $xs->elementEnd('poco:urls');
+ return $xs->getString();
+ }
+}
+
+class PoCoAddress
+{
+ const ADDRESS = 'address';
+ const FORMATTED = 'formatted';
+
+ public $formatted;
+
+ // @todo Other address fields
+
+ function asString()
+ {
+ if (!empty($this->formatted)) {
+ $xs = new XMLStringer(true);
+ $xs->elementStart('poco:address');
+ $xs->element('poco:formatted', null, $this->formatted);
+ $xs->elementEnd('poco:address');
+ return $xs->getString();
+ }
+
+ return null;
+ }
+}
+
+class PoCo
+{
+ const NS = 'http://portablecontacts.net/spec/1.0';
+
+ const USERNAME = 'preferredUsername';
+ const DISPLAYNAME = 'displayName';
+ const NOTE = 'note';
+
+ public $preferredUsername;
+ public $displayName;
+ public $note;
+ public $address;
+ public $urls = array();
+
+ function __construct($element = null)
+ {
+ if (empty($element)) {
+ return;
+ }
+
+ $this->preferredUsername = ActivityUtils::childContent(
+ $element,
+ self::USERNAME,
+ self::NS
+ );
+
+ $this->displayName = ActivityUtils::childContent(
+ $element,
+ self::DISPLAYNAME,
+ self::NS
+ );
+
+ $this->note = ActivityUtils::childContent(
+ $element,
+ self::NOTE,
+ self::NS
+ );
+
+ $this->address = $this->_getAddress($element);
+ $this->urls = $this->_getURLs($element);
+ }
+
+ private function _getURLs($element)
+ {
+ $urlEls = $element->getElementsByTagnameNS(self::NS, PoCoURL::URLS);
+ $urls = array();
+
+ foreach ($urlEls as $urlEl) {
+
+ $type = ActivityUtils::childContent(
+ $urlEl,
+ PoCoURL::TYPE,
+ PoCo::NS
+ );
+
+ $value = ActivityUtils::childContent(
+ $urlEl,
+ PoCoURL::VALUE,
+ PoCo::NS
+ );
+
+ $primary = ActivityUtils::childContent(
+ $urlEl,
+ PoCoURL::PRIMARY,
+ PoCo::NS
+ );
+
+ $isPrimary = false;
+
+ if (isset($primary) && $primary == 'true') {
+ $isPrimary = true;
+ }
+
+ // @todo check to make sure a primary hasn't already been added
+
+ array_push($urls, new PoCoURL($type, $value, $isPrimary));
+ }
+ return $urls;
+ }
+
+ private function _getAddress($element)
+ {
+ $addressEl = ActivityUtils::child(
+ $element,
+ PoCoAddress::ADDRESS,
+ PoCo::NS
+ );
+
+ if (!empty($addressEl)) {
+ $formatted = ActivityUtils::childContent(
+ $addressEl,
+ PoCoAddress::FORMATTED,
+ self::NS
+ );
+
+ if (!empty($formatted)) {
+ $address = new PoCoAddress();
+ $address->formatted = $formatted;
+ return $address;
+ }
+ }
+
+ return null;
+ }
+
+ function fromProfile($profile)
+ {
+ if (empty($profile)) {
+ return null;
+ }
+
+ $poco = new PoCo();
+
+ $poco->preferredUsername = $profile->nickname;
+ $poco->displayName = $profile->getBestName();
+
+ $poco->note = $profile->bio;
+
+ $paddy = new PoCoAddress();
+ $paddy->formatted = $profile->location;
+ $poco->address = $paddy;
+
+ if (!empty($profile->homepage)) {
+ array_push(
+ $poco->urls,
+ new PoCoURL(
+ 'homepage',
+ $profile->homepage,
+ true
+ )
+ );
+ }
+
+ return $poco;
+ }
+
+ function fromGroup($group)
+ {
+ if (empty($group)) {
+ return null;
+ }
+
+ $poco = new PoCo();
+
+ $poco->preferredUsername = $group->nickname;
+ $poco->displayName = $group->getBestName();
+
+ $poco->note = $group->description;
+
+ $paddy = new PoCoAddress();
+ $paddy->formatted = $group->location;
+ $poco->address = $paddy;
+
+ if (!empty($group->homepage)) {
+ array_push(
+ $poco->urls,
+ new PoCoURL(
+ 'homepage',
+ $group->homepage,
+ true
+ )
+ );
+ }
+
+ return $poco;
+ }
+
+ function getPrimaryURL()
+ {
+ foreach ($this->urls as $url) {
+ if ($url->primary) {
+ return $url;
+ }
+ }
+ }
+
+ function asString()
+ {
+ $xs = new XMLStringer(true);
+ $xs->element(
+ 'poco:preferredUsername',
+ null,
+ $this->preferredUsername
+ );
+
+ $xs->element(
+ 'poco:displayName',
+ null,
+ $this->displayName
+ );
+
+ if (!empty($this->note)) {
+ $xs->element('poco:note', null, $this->note);
+ }
+
+ if (!empty($this->address)) {
+ $xs->raw($this->address->asString());
+ }
+
+ foreach ($this->urls as $url) {
+ $xs->raw($url->asString());
+ }
+
+ return $xs->getString();
+ }
+}
+
+/**
+ * Utilities for turning DOMish things into Activityish things
+ *
+ * Some common functions that I didn't have the bandwidth to try to factor
+ * into some kind of reasonable superclass, so just dumped here. Might
+ * be useful to have an ActivityObject parent class or something.
+ *
+ * @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 ActivityUtils
+{
+ const ATOM = 'http://www.w3.org/2005/Atom';
+
+ const LINK = 'link';
+ const REL = 'rel';
+ const TYPE = 'type';
+ const HREF = 'href';
+
+ const CONTENT = 'content';
+ const SRC = 'src';
+
+ /**
+ * Get the permalink for an Activity object
+ *
+ * @param DOMElement $element A DOM element
+ *
+ * @return string related link, if any
+ */
+
+ static function getPermalink($element)
+ {
+ return self::getLink($element, 'alternate', 'text/html');
+ }
+
+ /**
+ * Get the permalink for an Activity object
+ *
+ * @param DOMElement $element A DOM element
+ *
+ * @return string related link, if any
+ */
+
+ static function getLink(DOMNode $element, $rel, $type=null)
+ {
+ $els = $element->childNodes;
+
+ foreach ($els as $link) {
+ if ($link->localName == self::LINK && $link->namespaceURI == self::ATOM) {
+
+ $linkRel = $link->getAttribute(self::REL);
+ $linkType = $link->getAttribute(self::TYPE);
+
+ if ($linkRel == $rel &&
+ (is_null($type) || $linkType == $type)) {
+ return $link->getAttribute(self::HREF);
+ }
+ }
+ }
+
+ return null;
+ }
+
+ static function getLinks(DOMNode $element, $rel, $type=null)
+ {
+ $els = $element->childNodes;
+ $out = array();
+
+ foreach ($els as $link) {
+ if ($link->localName == self::LINK && $link->namespaceURI == self::ATOM) {
+
+ $linkRel = $link->getAttribute(self::REL);
+ $linkType = $link->getAttribute(self::TYPE);
+
+ if ($linkRel == $rel &&
+ (is_null($type) || $linkType == $type)) {
+ $out[] = $link;
+ }
+ }
+ }
+
+ return $out;
+ }
+
+ /**
+ * Gets the first child element with the given tag
+ *
+ * @param DOMElement $element element to pick at
+ * @param string $tag tag to look for
+ * @param string $namespace Namespace to look under
+ *
+ * @return DOMElement found element or null
+ */
+
+ static function child(DOMNode $element, $tag, $namespace=self::ATOM)
+ {
+ $els = $element->childNodes;
+ if (empty($els) || $els->length == 0) {
+ return null;
+ } else {
+ for ($i = 0; $i < $els->length; $i++) {
+ $el = $els->item($i);
+ if ($el->localName == $tag && $el->namespaceURI == $namespace) {
+ return $el;
+ }
+ }
+ }
+ }
+
+ /**
+ * Grab the text content of a DOM element child of the current element
+ *
+ * @param DOMElement $element Element whose children we examine
+ * @param string $tag Tag to look up
+ * @param string $namespace Namespace to use, defaults to Atom
+ *
+ * @return string content of the child
+ */
+
+ static function childContent(DOMNode $element, $tag, $namespace=self::ATOM)
+ {
+ $el = self::child($element, $tag, $namespace);
+
+ if (empty($el)) {
+ return null;
+ } else {
+ return $el->textContent;
+ }
+ }
+
+ /**
+ * Get the content of an atom:entry-like object
+ *
+ * @param DOMElement $element The element to examine.
+ *
+ * @return string unencoded HTML content of the element, like "This -&lt; is <b>HTML</b>."
+ *
+ * @todo handle remote content
+ * @todo handle embedded XML mime types
+ * @todo handle base64-encoded non-XML and non-text mime types
+ */
+
+ static function getContent($element)
+ {
+ $contentEl = ActivityUtils::child($element, self::CONTENT);
+
+ if (!empty($contentEl)) {
+
+ $src = $contentEl->getAttribute(self::SRC);
+
+ if (!empty($src)) {
+ throw new ClientException(_("Can't handle remote content yet."));
+ }
+
+ $type = $contentEl->getAttribute(self::TYPE);
+
+ // slavishly following http://atompub.org/rfc4287.html#rfc.section.4.1.3.3
+
+ if ($type == 'text') {
+ return $contentEl->textContent;
+ } else if ($type == 'html') {
+ $text = $contentEl->textContent;
+ return htmlspecialchars_decode($text, ENT_QUOTES);
+ } else if ($type == 'xhtml') {
+ $divEl = ActivityUtils::child($contentEl, 'div');
+ if (empty($divEl)) {
+ return null;
+ }
+ $doc = $divEl->ownerDocument;
+ $text = '';
+ $children = $divEl->childNodes;
+
+ for ($i = 0; $i < $children->length; $i++) {
+ $child = $children->item($i);
+ $text .= $doc->saveXML($child);
+ }
+ return trim($text);
+ } else if (in_array(array('text/xml', 'application/xml'), $type) ||
+ preg_match('#(+|/)xml$#', $type)) {
+ throw new ClientException(_("Can't handle embedded XML content yet."));
+ } else if (strncasecmp($type, 'text/', 5)) {
+ return $contentEl->textContent;
+ } else {
+ throw new ClientException(_("Can't handle embedded Base64 content yet."));
+ }
+ }
+ }
+}
+
+// XXX: Arg! This wouldn't be necessary if we used Avatars conistently
+class AvatarLink
+{
+ public $url;
+ public $type;
+ public $size;
+ public $width;
+ public $height;
+
+ function __construct($element=null)
+ {
+ if ($element) {
+ // @fixme use correct namespaces
+ $this->url = $element->getAttribute('href');
+ $this->type = $element->getAttribute('type');
+ $width = $element->getAttribute('media:width');
+ if ($width != null) {
+ $this->width = intval($width);
+ }
+ $height = $element->getAttribute('media:height');
+ if ($height != null) {
+ $this->height = intval($height);
+ }
+ }
+ }
+
+ static function fromAvatar($avatar)
+ {
+ if (empty($avatar)) {
+ return null;
+ }
+ $alink = new AvatarLink();
+ $alink->type = $avatar->mediatype;
+ $alink->height = $avatar->height;
+ $alink->width = $avatar->width;
+ $alink->url = $avatar->displayUrl();
+ return $alink;
+ }
+
+ static function fromFilename($filename, $size)
+ {
+ $alink = new AvatarLink();
+ $alink->url = $filename;
+ $alink->height = $size;
+ if (!empty($filename)) {
+ $alink->width = $size;
+ $alink->type = self::mediatype($filename);
+ } else {
+ $alink->url = User_group::defaultLogo($size);
+ $alink->type = 'image/png';
+ }
+ return $alink;
+ }
+
+ // yuck!
+ static function mediatype($filename) {
+ $ext = strtolower(end(explode('.', $filename)));
+ if ($ext == 'jpeg') {
+ $ext = 'jpg';
+ }
+ // hope we don't support any others
+ $types = array('png', 'gif', 'jpg', 'jpeg');
+ if (in_array($ext, $types)) {
+ return 'image/' . $ext;
+ }
+ return null;
+ }
+}
+
+/**
+ * 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->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;
+ }
+ }
+
+ } else {
+
+ $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->title = $this->_childContent($element, self::TITLE);
+ $this->summary = $this->_childContent($element, self::SUMMARY);
+
+ $this->source = $this->_getSource($element);
+
+ $this->content = ActivityUtils::getContent($element);
+
+ $this->link = ActivityUtils::getPermalink($element);
+
+ }
+
+ // Some per-type attributes...
+ if ($this->type == self::PERSON || $this->type == self::GROUP) {
+ $this->displayName = $this->title;
+
+ $avatars = ActivityUtils::getLinks($element, 'avatar');
+ foreach ($avatars as $link) {
+ $this->avatarLinks[] = new AvatarLink($link);
+ }
+
+ $this->poco = new PoCo($element);
+ }
+ }
+
+ 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)
+ {
+ $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)
+ {
+ $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, $this->title);
+ }
+
+ if (!empty($this->summary)) {
+ $xs->element(self::SUMMARY, null, $this->summary);
+ }
+
+ if (!empty($this->content)) {
+ // XXX: assuming HTML content here
+ $xs->element(ActivityUtils::CONTENT, array('type' => 'html'), $this->content);
+ }
+
+ if (!empty($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();
+ }
+}
+
+/**
+ * Utility class to hold a bunch of constant defining default verb types
+ *
+ * @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 ActivityVerb
+{
+ const POST = 'http://activitystrea.ms/schema/1.0/post';
+ const SHARE = 'http://activitystrea.ms/schema/1.0/share';
+ const SAVE = 'http://activitystrea.ms/schema/1.0/save';
+ const FAVORITE = 'http://activitystrea.ms/schema/1.0/favorite';
+ const PLAY = 'http://activitystrea.ms/schema/1.0/play';
+ const FOLLOW = 'http://activitystrea.ms/schema/1.0/follow';
+ const FRIEND = 'http://activitystrea.ms/schema/1.0/make-friend';
+ const JOIN = 'http://activitystrea.ms/schema/1.0/join';
+ const TAG = 'http://activitystrea.ms/schema/1.0/tag';
+
+ // Custom OStatus verbs for the flipside until they're standardized
+ const DELETE = 'http://ostatus.org/schema/1.0/unfollow';
+ const UNFAVORITE = 'http://ostatus.org/schema/1.0/unfavorite';
+ const UNFOLLOW = 'http://ostatus.org/schema/1.0/unfollow';
+ const LEAVE = 'http://ostatus.org/schema/1.0/leave';
+
+ // For simple profile-update pings; no content to share.
+ const UPDATE_PROFILE = 'http://ostatus.org/schema/1.0/update-profile';
+}
+
+class ActivityContext
+{
+ public $replyToID;
+ public $replyToUrl;
+ public $location;
+ public $attention = array();
+ public $conversation;
+
+ const THR = 'http://purl.org/syndication/thread/1.0';
+ const GEORSS = 'http://www.georss.org/georss';
+ const OSTATUS = 'http://ostatus.org/schema/1.0';
+
+ const INREPLYTO = 'in-reply-to';
+ const REF = 'ref';
+ const HREF = 'href';
+
+ const POINT = 'point';
+
+ const ATTENTION = 'ostatus:attention';
+ const CONVERSATION = 'ostatus:conversation';
+
+ function __construct($element)
+ {
+ $replyToEl = ActivityUtils::child($element, self::INREPLYTO, self::THR);
+
+ if (!empty($replyToEl)) {
+ $this->replyToID = $replyToEl->getAttribute(self::REF);
+ $this->replyToUrl = $replyToEl->getAttribute(self::HREF);
+ }
+
+ $this->location = $this->getLocation($element);
+
+ $this->conversation = ActivityUtils::getLink($element, self::CONVERSATION);
+
+ // Multiple attention links allowed
+
+ $links = $element->getElementsByTagNameNS(ActivityUtils::ATOM, ActivityUtils::LINK);
+
+ for ($i = 0; $i < $links->length; $i++) {
+
+ $link = $links->item($i);
+
+ $linkRel = $link->getAttribute(ActivityUtils::REL);
+
+ if ($linkRel == self::ATTENTION) {
+ $this->attention[] = $link->getAttribute(self::HREF);
+ }
+ }
+ }
+
+ /**
+ * Parse location given as a GeoRSS-simple point, if provided.
+ * http://www.georss.org/simple
+ *
+ * @param feed item $entry
+ * @return mixed Location or false
+ */
+ function getLocation($dom)
+ {
+ $points = $dom->getElementsByTagNameNS(self::GEORSS, self::POINT);
+
+ for ($i = 0; $i < $points->length; $i++) {
+ $point = $points->item($i)->textContent;
+ return self::locationFromPoint($point);
+ }
+
+ return null;
+ }
+
+ // XXX: Move to ActivityUtils or Location?
+ static function locationFromPoint($point)
+ {
+ $point = str_replace(',', ' ', $point); // per spec "treat commas as whitespace"
+ $point = preg_replace('/\s+/', ' ', $point);
+ $point = trim($point);
+ $coords = explode(' ', $point);
+ if (count($coords) == 2) {
+ list($lat, $lon) = $coords;
+ if (is_numeric($lat) && is_numeric($lon)) {
+ common_log(LOG_INFO, "Looking up location for $lat $lon from georss point");
+ return Location::fromLatLon($lat, $lon);
+ }
+ }
+ common_log(LOG_ERR, "Ignoring bogus georss:point value $point");
+ return null;
+ }
+}
+
+/**
+ * An activity in the ActivityStrea.ms world
+ *
+ * An activity is kind of like a sentence: someone did something
+ * to something else.
+ *
+ * 'someone' is the 'actor'; 'did something' is the verb;
+ * 'something else' is the object.
+ *
+ * @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 Activity
+{
+ const SPEC = 'http://activitystrea.ms/spec/1.0/';
+ const SCHEMA = 'http://activitystrea.ms/schema/1.0/';
+
+ const VERB = 'verb';
+ const OBJECT = 'object';
+ const ACTOR = 'actor';
+ const SUBJECT = 'subject';
+ const OBJECTTYPE = 'object-type';
+ const CONTEXT = 'context';
+ const TARGET = 'target';
+
+ const ATOM = 'http://www.w3.org/2005/Atom';
+
+ const AUTHOR = 'author';
+ const PUBLISHED = 'published';
+ const UPDATED = 'updated';
+
+ public $actor; // an ActivityObject
+ public $verb; // a string (the URL)
+ public $object; // an ActivityObject
+ public $target; // an ActivityObject
+ public $context; // an ActivityObject
+ public $time; // Time of the activity
+ public $link; // an ActivityObject
+ public $entry; // the source entry
+ public $feed; // the source feed
+
+ public $summary; // summary of activity
+ public $content; // HTML content of activity
+ public $id; // ID of the activity
+ public $title; // title of the activity
+ public $categories = array(); // list of AtomCategory objects
+ public $enclosures = array(); // list of enclosure URL references
+
+ /**
+ * Turns a regular old Atom <entry> into a magical activity
+ *
+ * @param DOMElement $entry Atom entry to poke at
+ * @param DOMElement $feed Atom feed, for context
+ */
+
+ function __construct($entry = null, $feed = null)
+ {
+ if (is_null($entry)) {
+ return;
+ }
+
+ $this->entry = $entry;
+
+ // @fixme Don't send in a DOMDocument
+ if ($feed instanceof DOMDocument) {
+ common_log(
+ LOG_WARNING,
+ 'Activity::__construct() - '
+ . 'DOMDocument passed in for feed by mistake. '
+ . "Expecting a 'feed' DOMElement."
+ );
+ $feed = $feed->getElementsByTagName('feed')->item(0);
+ }
+
+ $this->feed = $feed;
+
+ $pubEl = $this->_child($entry, self::PUBLISHED, self::ATOM);
+
+ if (!empty($pubEl)) {
+ $this->time = strtotime($pubEl->textContent);
+ } else {
+ // XXX technically an error; being liberal. Good idea...?
+ $updateEl = $this->_child($entry, self::UPDATED, self::ATOM);
+ if (!empty($updateEl)) {
+ $this->time = strtotime($updateEl->textContent);
+ } else {
+ $this->time = null;
+ }
+ }
+
+ $this->link = ActivityUtils::getPermalink($entry);
+
+ $verbEl = $this->_child($entry, self::VERB);
+
+ if (!empty($verbEl)) {
+ $this->verb = trim($verbEl->textContent);
+ } else {
+ $this->verb = ActivityVerb::POST;
+ // XXX: do other implied stuff here
+ }
+
+ $objectEl = $this->_child($entry, self::OBJECT);
+
+ if (!empty($objectEl)) {
+ $this->object = new ActivityObject($objectEl);
+ } else {
+ $this->object = new ActivityObject($entry);
+ }
+
+ $actorEl = $this->_child($entry, self::ACTOR);
+
+ if (!empty($actorEl)) {
+
+ $this->actor = new ActivityObject($actorEl);
+
+ } else if (!empty($feed) &&
+ $subjectEl = $this->_child($feed, self::SUBJECT)) {
+
+ $this->actor = new ActivityObject($subjectEl);
+
+ } else if ($authorEl = $this->_child($entry, self::AUTHOR, self::ATOM)) {
+
+ $this->actor = new ActivityObject($authorEl);
+
+ } else if (!empty($feed) && $authorEl = $this->_child($feed, self::AUTHOR,
+ self::ATOM)) {
+
+ $this->actor = new ActivityObject($authorEl);
+ }
+
+ $contextEl = $this->_child($entry, self::CONTEXT);
+
+ if (!empty($contextEl)) {
+ $this->context = new ActivityContext($contextEl);
+ } else {
+ $this->context = new ActivityContext($entry);
+ }
+
+ $targetEl = $this->_child($entry, self::TARGET);
+
+ if (!empty($targetEl)) {
+ $this->target = new ActivityObject($targetEl);
+ }
+
+ $this->summary = ActivityUtils::childContent($entry, 'summary');
+ $this->id = ActivityUtils::childContent($entry, 'id');
+ $this->content = ActivityUtils::getContent($entry);
+
+ $catEls = $entry->getElementsByTagNameNS(self::ATOM, 'category');
+ if ($catEls) {
+ for ($i = 0; $i < $catEls->length; $i++) {
+ $catEl = $catEls->item($i);
+ $this->categories[] = new AtomCategory($catEl);
+ }
+ }
+
+ foreach (ActivityUtils::getLinks($entry, 'enclosure') as $link) {
+ $this->enclosures[] = $link->getAttribute('href');
+ }
+ }
+
+ /**
+ * Returns an Atom <entry> based on this activity
+ *
+ * @return DOMElement Atom entry
+ */
+
+ function toAtomEntry()
+ {
+ return null;
+ }
+
+ function asString($namespace=false)
+ {
+ $xs = new XMLStringer(true);
+
+ if ($namespace) {
+ $attrs = array('xmlns' => 'http://www.w3.org/2005/Atom',
+ 'xmlns:activity' => 'http://activitystrea.ms/spec/1.0/',
+ 'xmlns:georss' => 'http://www.georss.org/georss',
+ 'xmlns:ostatus' => 'http://ostatus.org/schema/1.0',
+ 'xmlns:poco' => 'http://portablecontacts.net/spec/1.0',
+ 'xmlns:media' => 'http://purl.org/syndication/atommedia');
+ } else {
+ $attrs = array();
+ }
+
+ $xs->elementStart('entry', $attrs);
+
+ $xs->element('id', null, $this->id);
+ $xs->element('title', null, $this->title);
+ $xs->element('published', null, common_date_iso8601($this->time));
+ $xs->element('content', array('type' => 'html'), $this->content);
+
+ if (!empty($this->summary)) {
+ $xs->element('summary', null, $this->summary);
+ }
+
+ if (!empty($this->link)) {
+ $xs->element('link', array('rel' => 'alternate',
+ 'type' => 'text/html'),
+ $this->link);
+ }
+
+ // XXX: add context
+
+ $xs->elementStart('author');
+ $xs->element('uri', array(), $this->actor->id);
+ if ($this->actor->title) {
+ $xs->element('name', array(), $this->actor->title);
+ }
+ $xs->elementEnd('author');
+ $xs->raw($this->actor->asString('activity:actor'));
+
+ $xs->element('activity:verb', null, $this->verb);
+
+ if ($this->object) {
+ $xs->raw($this->object->asString());
+ }
+
+ if ($this->target) {
+ $xs->raw($this->target->asString('activity:target'));
+ }
+
+ foreach ($this->categories as $cat) {
+ $xs->raw($cat->asString());
+ }
+
+ $xs->elementEnd('entry');
+
+ return $xs->getString();
+ }
+
+ private function _child($element, $tag, $namespace=self::SPEC)
+ {
+ return ActivityUtils::child($element, $tag, $namespace);
+ }
+}
+
+class AtomCategory
+{
+ public $term;
+ public $scheme;
+ public $label;
+
+ function __construct($element=null)
+ {
+ if ($element && $element->attributes) {
+ $this->term = $this->extract($element, 'term');
+ $this->scheme = $this->extract($element, 'scheme');
+ $this->label = $this->extract($element, 'label');
+ }
+ }
+
+ protected function extract($element, $attrib)
+ {
+ $node = $element->attributes->getNamedItemNS(Activity::ATOM, $attrib);
+ if ($node) {
+ return trim($node->textContent);
+ }
+ $node = $element->attributes->getNamedItem($attrib);
+ if ($node) {
+ return trim($node->textContent);
+ }
+ return null;
+ }
+
+ function asString()
+ {
+ $attribs = array();
+ if ($this->term !== null) {
+ $attribs['term'] = $this->term;
+ }
+ if ($this->scheme !== null) {
+ $attribs['scheme'] = $this->scheme;
+ }
+ if ($this->label !== null) {
+ $attribs['label'] = $this->label;
+ }
+ $xs = new XMLStringer();
+ $xs->element('category', $attribs);
+ return $xs->asString();
+ }
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-09 00:51:51 +0000