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Diffstat (limited to 'lib/atom10feed.php')
| -rw-r--r-- | lib/atom10feed.php | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/lib/atom10feed.php b/lib/atom10feed.php new file mode 100644 index 000000000..8842840d5 --- /dev/null +++ b/lib/atom10feed.php @@ -0,0 +1,305 @@ +<?php +/** + * StatusNet, the distributed open-source microblogging tool + * + * Class for building an Atom feed in memory + * + * 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 Zach Copley <zach@status.net> + * @copyright 2010 StatusNet, Inc. + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 + * @link http://status.net/ + */ + +if (!defined('STATUSNET')) +{ + exit(1); +} + +class Atom10FeedException extends Exception +{ +} + +/** + * Class for building an Atom feed in memory. Get the finished doc + * as a string with Atom10Feed::getString(). + * + * @category Feed + * @package StatusNet + * @author Zach Copley <zach@status.net> + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 + * @link http://status.net/ + */ +class Atom10Feed extends XMLStringer +{ + public $xw; + private $namespaces; + private $authors; + private $subject; + private $categories; + private $contributors; + private $generator; + private $icon; + private $links; + private $logo; + private $rights; + private $subtitle; + private $title; + private $published; + private $updated; + private $entries; + + /** + * Constructor + * + * @param boolean $indent flag to turn indenting on or off + * + * @return void + */ + function __construct($indent = true) { + parent::__construct($indent); + $this->namespaces = array(); + $this->authors = array(); + $this->links = array(); + $this->entries = array(); + $this->addNamespace('', 'http://www.w3.org/2005/Atom'); + } + + /** + * Add another namespace to the feed + * + * @param string $namespace the namespace + * @param string $uri namspace uri + * + * @return void + */ + function addNamespace($namespace, $uri) + { + $ns = array($namespace => $uri); + $this->namespaces = array_merge($this->namespaces, $ns); + } + + function addAuthor($name, $uri = null, $email = null) + { + $xs = new XMLStringer(true); + + $xs->elementStart('author'); + + if (!empty($name)) { + $xs->element('name', null, $name); + } else { + throw new Atom10FeedException( + 'author element must contain a name element.' + ); + } + + if (isset($uri)) { + $xs->element('uri', null, $uri); + } + + if (isset($email)) { + $xs->element('email', null, $email); + } + + $xs->elementEnd('author'); + + array_push($this->authors, $xs->getString()); + } + + /** + * Add an Author to the feed via raw XML string + * + * @param string $xmlAuthor An XML string representation author + * + * @return void + */ + function addAuthorRaw($xmlAuthor) + { + array_push($this->authors, $xmlAuthor); + } + + function renderAuthors() + { + foreach ($this->authors as $author) { + $this->raw($author); + } + } + + /** + * Add a activity feed subject via raw XML string + * + * @param string $xmlSubject An XML string representation of the subject + * + * @return void + */ + function setActivitySubject($xmlSubject) + { + $this->subject = $xmlSubject; + } + + function getNamespaces() + { + return $this->namespaces; + } + + function initFeed() + { + $this->xw->startDocument('1.0', 'UTF-8'); + $commonAttrs = array('xml:lang' => 'en-US'); + foreach ($this->namespaces as $prefix => $uri) { + if ($prefix == '') { + $attr = 'xmlns'; + } else { + $attr = 'xmlns:' . $prefix; + } + $commonAttrs[$attr] = $uri; + } + $this->elementStart('feed', $commonAttrs); + + $this->element('id', null, $this->id); + $this->element('title', null, $this->title); + $this->element('subtitle', null, $this->subtitle); + + if (!empty($this->logo)) { + $this->element('logo', null, $this->logo); + } + + $this->element('updated', null, $this->updated); + + $this->renderAuthors(); + + $this->renderLinks(); + } + + /** + * Check that all required elements have been set, etc. + * Throws an Atom10FeedException if something's missing. + * + * @return void + */ + function validate() + { + } + + function renderLinks() + { + foreach ($this->links as $attrs) + { + $this->element('link', $attrs, null); + } + } + + function addEntryRaw($xmlEntry) + { + array_push($this->entries, $xmlEntry); + } + + function addEntry($entry) + { + array_push($this->entries, $entry->getString()); + } + + function renderEntries() + { + foreach ($this->entries as $entry) { + $this->raw($entry); + } + } + + function endFeed() + { + $this->elementEnd('feed'); + $this->xw->endDocument(); + } + + function getString() + { + if (Event::handle('StartApiAtom', array($this))) { + + $this->validate(); + $this->initFeed(); + + if (!empty($this->subject)) { + $this->raw($this->subject); + } + + $this->renderEntries(); + $this->endFeed(); + + Event::handle('EndApiAtom', array($this)); + } + + return $this->xw->outputMemory(); + } + + function setId($id) + { + $this->id = $id; + } + + function setTitle($title) + { + $this->title = $title; + } + + function setSubtitle($subtitle) + { + $this->subtitle = $subtitle; + } + + function setLogo($logo) + { + $this->logo = $logo; + } + + function setUpdated($dt) + { + $this->updated = common_date_iso8601($dt); + } + + function setPublished($dt) + { + $this->published = common_date_iso8601($dt); + } + + /** + * Adds a link element into the Atom document + * + * Assumes you want rel="alternate" and type="text/html" unless + * you send in $otherAttrs. + * + * @param string $uri the uri the href needs to point to + * @param array $otherAttrs other attributes to stick in + * + * @return void + */ + function addLink($uri, $otherAttrs = null) { + $attrs = array('href' => $uri); + + if (is_null($otherAttrs)) { + $attrs['rel'] = 'alternate'; + $attrs['type'] = 'text/html'; + } else { + $attrs = array_merge($attrs, $otherAttrs); + } + + array_push($this->links, $attrs); + } + +} |