forked from GNUsocial/gnu-social
Parse RSS items as activities
First steps to parsing RSS items as activities. RSS feeds don't seem to have enough data to make good remote profiles, but this may work with some "hints".
This commit is contained in:
Evan Prodromou
272
lib/activity.php
272
lib/activity.php
@@ -643,38 +643,11 @@ class ActivityObject
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);
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if ($element->tagName == 'author') {
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$this->type = self::PERSON; // XXX: is this fair?
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$this->title = $this->_childContent($element, self::NAME);
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$this->id = $this->_childContent($element, self::URI);
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if (empty($this->id)) {
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$email = $this->_childContent($element, self::EMAIL);
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if (!empty($email)) {
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// XXX: acct: ?
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$this->id = 'mailto:'.$email;
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}
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}
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$this->_fromAuthor($element);
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} else if ($element->tagName == 'item') {
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$this->_fromRssItem($element);
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} else {
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$this->type = $this->_childContent($element, Activity::OBJECTTYPE,
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Activity::SPEC);
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if (empty($this->type)) {
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$this->type = ActivityObject::NOTE;
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}
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$this->id = $this->_childContent($element, self::ID);
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$this->title = $this->_childContent($element, self::TITLE);
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$this->summary = $this->_childContent($element, self::SUMMARY);
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$this->source = $this->_getSource($element);
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$this->content = ActivityUtils::getContent($element);
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$this->link = ActivityUtils::getPermalink($element);
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$this->_fromAtomEntry($element);
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}
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// Some per-type attributes...
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@@ -697,6 +670,72 @@ class ActivityObject
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}
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}
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private function _fromAuthor($element)
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{
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$this->type = self::PERSON; // XXX: is this fair?
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$this->title = $this->_childContent($element, self::NAME);
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$this->id = $this->_childContent($element, self::URI);
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if (empty($this->id)) {
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$email = $this->_childContent($element, self::EMAIL);
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if (!empty($email)) {
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// XXX: acct: ?
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$this->id = 'mailto:'.$email;
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}
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}
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}
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private function _fromAtomEntry($element)
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{
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$this->type = $this->_childContent($element, Activity::OBJECTTYPE,
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Activity::SPEC);
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if (empty($this->type)) {
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$this->type = ActivityObject::NOTE;
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}
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$this->id = $this->_childContent($element, self::ID);
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$this->title = $this->_childContent($element, self::TITLE);
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$this->summary = $this->_childContent($element, self::SUMMARY);
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$this->source = $this->_getSource($element);
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$this->content = ActivityUtils::getContent($element);
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$this->link = ActivityUtils::getPermalink($element);
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}
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// @fixme rationalize with Activity::_fromRssItem()
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private function _fromRssItem($item)
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{
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$this->title = ActivityUtils::childContent($item, ActivityObject::TITLE, Activity::RSS);
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$contentEl = ActivityUtils::child($item, ActivityUtils::CONTENT, Activity::CONTENTNS);
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if (!empty($contentEl)) {
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$this->content = htmlspecialchars_decode($contentEl->textContent, ENT_QUOTES);
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} else {
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$descriptionEl = ActivityUtils::child($item, Activity::DESCRIPTION, Activity::RSS);
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if (!empty($descriptionEl)) {
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$this->content = htmlspecialchars_decode($descriptionEl->textContent, ENT_QUOTES);
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}
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}
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$this->link = ActivityUtils::childContent($item, ActivityUtils::LINK, Activity::RSS);
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$guidEl = ActivityUtils::child($item, Activity::GUID, Activity::RSS);
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if (!empty($guidEl)) {
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$this->id = $guidEl->textContent;
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if ($guidEl->hasAttribute('isPermaLink')) {
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// overwrites <link>
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$this->link = $this->id;
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}
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}
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}
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private function _childContent($element, $tag, $namespace=ActivityUtils::ATOM)
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{
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return ActivityUtils::childContent($element, $tag, $namespace);
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@@ -1051,6 +1090,21 @@ class Activity
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const PUBLISHED = 'published';
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const UPDATED = 'updated';
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const RSS = null; // no namespace!
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const PUBDATE = 'pubDate';
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const DESCRIPTION = 'description';
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const GUID = 'guid';
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const SELF = 'self';
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const IMAGE = 'image';
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const URL = 'url';
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const DC = 'http://purl.org/dc/elements/1.1/';
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const CREATOR = 'creator';
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const CONTENTNS = 'http://purl.org/rss/1.0/modules/content/';
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public $actor; // an ActivityObject
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public $verb; // a string (the URL)
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public $object; // an ActivityObject
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@@ -1081,8 +1135,6 @@ class Activity
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return;
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}
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$this->entry = $entry;
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// Insist on a feed's root DOMElement; don't allow a DOMDocument
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if ($feed instanceof DOMDocument) {
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throw new ClientException(
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@@ -1090,8 +1142,22 @@ class Activity
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);
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}
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$this->entry = $entry;
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$this->feed = $feed;
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if ($entry->namespaceURI == Activity::ATOM &&
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$entry->localName == 'entry') {
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$this->_fromAtomEntry($entry, $feed);
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} else if ($entry->namespaceURI == Activity::RSS &&
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$entry->localName == 'item') {
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$this->_fromRssItem($entry, $feed);
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} else {
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throw new Exception("Unknown DOM element: {$entry->namespaceURI} {$entry->localName}");
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}
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}
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function _fromAtomEntry($entry, $feed)
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{
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$pubEl = $this->_child($entry, self::PUBLISHED, self::ATOM);
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if (!empty($pubEl)) {
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@@ -1177,6 +1243,69 @@ class Activity
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}
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}
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function _fromRssItem($item, $rss)
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{
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$verbEl = $this->_child($item, self::VERB);
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if (!empty($verbEl)) {
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$this->verb = trim($verbEl->textContent);
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} else {
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$this->verb = ActivityVerb::POST;
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// XXX: do other implied stuff here
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}
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$pubDateEl = $this->_child($item, self::PUBDATE, self::RSS);
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if (!empty($pubDateEl)) {
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$this->time = strtotime($pubDateEl->textContent);
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}
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$authorEl = $this->_child($item, self::AUTHOR, self::RSS);
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if (!empty($authorEl)) {
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$this->actor = $this->_fromRssAuthor($authorEl);
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} else {
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$dcCreatorEl = $this->_child($item, self::CREATOR, self::DC);
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if (!empty($dcCreatorEl)) {
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$this->actor = $this->_fromDcCreator($dcCreatorEl);
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} else if (!empty($rss)) {
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$this->actor = $this->_fromRss($rss);
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}
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}
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$this->title = ActivityUtils::childContent($item, ActivityObject::TITLE, self::RSS);
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$contentEl = ActivityUtils::child($item, ActivityUtils::CONTENT, self::CONTENTNS);
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if (!empty($contentEl)) {
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$this->content = htmlspecialchars_decode($contentEl->textContent, ENT_QUOTES);
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} else {
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$descriptionEl = ActivityUtils::child($item, self::DESCRIPTION, self::RSS);
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if (!empty($descriptionEl)) {
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$this->content = htmlspecialchars_decode($descriptionEl->textContent, ENT_QUOTES);
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}
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}
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$this->link = ActivityUtils::childContent($item, ActivityUtils::LINK, self::RSS);
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// @fixme enclosures
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// @fixme thumbnails... maybe
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$guidEl = ActivityUtils::child($item, self::GUID, self::RSS);
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if (!empty($guidEl)) {
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$this->id = $guidEl->textContent;
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if ($guidEl->hasAttribute('isPermaLink') && $guidEl->getAttribute('isPermaLink') != 'false') {
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// overwrites <link>
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$this->link = $this->id;
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}
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}
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$this->object = new ActivityObject($item);
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$this->context = new ActivityContext($item);
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}
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/**
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* Returns an Atom <entry> based on this activity
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*
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@@ -1249,6 +1378,83 @@ class Activity
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return $xs->getString();
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}
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function _fromRssAuthor($el)
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{
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$text = $el->textContent;
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if (preg_match('/^(.*?) \((.*)\)$/', $text, $match)) {
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$email = $match[1];
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$name = $match[2];
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} else if (preg_match('/^(.*?) <(.*)>$/', $text, $match)) {
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$name = $match[1];
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$email = $match[2];
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} else if (preg_match('/.*@.*/', $text)) {
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$email = $text;
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$name = null;
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} else {
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$name = $text;
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$email = null;
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}
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// Not really enough info
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$actor = new ActivityObject();
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$actor->element = $el;
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$actor->type = ActivityObject::PERSON;
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$actor->title = $name;
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if (!empty($email)) {
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$actor->id = 'mailto:'.$email;
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}
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return $actor;
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}
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function _fromDcCreator($el)
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{
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// Not really enough info
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$text = $el->textContent;
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$actor = new ActivityObject();
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$actor->element = $el;
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$actor->title = $text;
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$actor->type = ActivityObject::PERSON;
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return $actor;
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}
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function _fromRss($el)
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{
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$actor = new ActivityObject();
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$actor->element = $el;
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$actor->type = ActivityObject::PERSON; // @fixme guess better
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$actor->title = ActivityUtils::childContent($el, ActivityObject::TITLE, self::RSS);
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$actor->link = ActivityUtils::childContent($el, ActivityUtils::LINK, self::RSS);
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$actor->id = ActivityUtils::getLink($el, self::SELF);
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$desc = ActivityUtils::childContent($el, self::DESCRIPTION, self::RSS);
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if (!empty($desc)) {
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$actor->content = htmlspecialchars_decode($desc, ENT_QUOTES);
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}
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$imageEl = ActivityUtils::child($el, self::IMAGE, self::RSS);
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if (!empty($imageEl)) {
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$actor->avatarLinks[] = ActivityUtils::childContent($imageEl, self::URL, self::RSS);
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}
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return $actor;
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}
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private function _child($element, $tag, $namespace=self::SPEC)
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{
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return ActivityUtils::child($element, $tag, $namespace);
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