Code standards for deliciousbackupimporter.php
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Evan Prodromou
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<?php
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/**
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2010, StatusNet, Inc.
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*
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* Importer class for Delicious.com backups
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*
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* PHP version 5
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Bookmark
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET')) {
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// This check helps protect against security problems;
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// your code file can't be executed directly from the web.
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exit(1);
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}
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require_once INSTALLDIR . '/lib/apiauth.php';
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/**
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* Importer class for Delicious bookmarks
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*
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* @category Bookmark
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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class DeliciousBackupImporter
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{
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function importBookmarks($user, $body)
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{
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$doc = $this->importHTML($body);
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/**
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* Import an in-memory bookmark list to a user's account
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*
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* Take a delicious.com backup file (same as Netscape bookmarks.html)
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* and import to StatusNet as Bookmark activities.
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*
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* The document format is terrible. It consists of a <dl> with
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* a bunch of <dt>'s, occasionally with <dd>'s.
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* There are sometimes <p>'s lost inside.
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*
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* @param User $user User whose feed we're going to fill
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* @param string $body Body of the file
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*
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* @return void
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*/
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$dls = $doc->getElementsByTagName('dl');
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function importBookmarks($user, $body)
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{
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$doc = $this->importHTML($body);
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if ($dls->length != 1) {
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throw new ClientException(_("Bad import file."));
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}
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$dls = $doc->getElementsByTagName('dl');
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$dl = $dls->item(0);
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if ($dls->length != 1) {
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throw new ClientException(_("Bad import file."));
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}
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$children = $dl->childNodes;
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$dl = $dls->item(0);
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$dt = null;
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$children = $dl->childNodes;
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for ($i = 0; $i < $children->length; $i++) {
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try {
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$child = $children->item($i);
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if ($child->nodeType != XML_ELEMENT_NODE) {
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continue;
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}
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common_log(LOG_INFO, $child->tagName);
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switch (strtolower($child->tagName)) {
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case 'dt':
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if (!empty($dt)) {
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// No DD provided
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$this->importBookmark($user, $dt);
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$dt = null;
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}
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$dt = $child;
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break;
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case 'dd':
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$dd = $child;
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$saved = $this->importBookmark($user, $dt, $dd);
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$dt = null;
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$dd = null;
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case 'p':
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common_log(LOG_INFO, 'Skipping the <p> in the <dl>.');
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break;
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default:
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common_log(LOG_WARNING, "Unexpected element $child->tagName found in import.");
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}
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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$dt = $dd = null;
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}
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}
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}
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$dt = null;
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function importBookmark($user, $dt, $dd = null)
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{
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// We have to go squirrelling around in the child nodes
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// on the off chance that we've received another <dt>
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// as a child.
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for ($i = 0; $i < $children->length; $i++) {
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try {
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$child = $children->item($i);
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if ($child->nodeType != XML_ELEMENT_NODE) {
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continue;
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}
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common_log(LOG_INFO, $child->tagName);
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switch (strtolower($child->tagName)) {
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case 'dt':
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if (!empty($dt)) {
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// No DD provided
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$this->importBookmark($user, $dt);
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$dt = null;
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}
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$dt = $child;
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break;
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case 'dd':
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$dd = $child;
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for ($i = 0; $i < $dt->childNodes->length; $i++) {
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$child = $dt->childNodes->item($i);
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if ($child->nodeType == XML_ELEMENT_NODE) {
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if ($child->tagName == 'dt' && !is_null($dd)) {
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$this->importBookmark($user, $dt);
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$this->importBookmark($user, $child, $dd);
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return;
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}
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}
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}
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$saved = $this->importBookmark($user, $dt, $dd);
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$as = $dt->getElementsByTagName('a');
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$dt = null;
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$dd = null;
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case 'p':
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common_log(LOG_INFO, 'Skipping the <p> in the <dl>.');
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break;
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default:
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common_log(LOG_WARNING,
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"Unexpected element $child->tagName ".
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" found in import.");
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}
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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$dt = $dd = null;
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}
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}
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}
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if ($as->length == 0) {
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throw new ClientException(_("No <A> tag in a <DT>."));
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}
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/**
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* Import a single bookmark
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*
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* Takes a <dt>/<dd> pair. The <dt> has a single
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* <a> in it with some non-standard attributes.
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*
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* A <dt><dt><dd> sequence will appear as a <dt> with
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* anothe <dt> as a child. We handle this case recursively.
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*
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* @param User $user User to import data as
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* @param DOMElement $dt <dt> element
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* @param DOMElement $dd <dd> element
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*
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* @return Notice imported notice
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*/
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$a = $as->item(0);
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function importBookmark($user, $dt, $dd = null)
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{
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// We have to go squirrelling around in the child nodes
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// on the off chance that we've received another <dt>
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// as a child.
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$private = $a->getAttribute('private');
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for ($i = 0; $i < $dt->childNodes->length; $i++) {
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$child = $dt->childNodes->item($i);
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if ($child->nodeType == XML_ELEMENT_NODE) {
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if ($child->tagName == 'dt' && !is_null($dd)) {
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$this->importBookmark($user, $dt);
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$this->importBookmark($user, $child, $dd);
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return;
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}
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}
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}
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if ($private != 0) {
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throw new ClientException(_('Skipping private bookmark.'));
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}
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$as = $dt->getElementsByTagName('a');
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if (!empty($dd)) {
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$description = $dd->nodeValue;
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} else {
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$description = null;
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}
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if ($as->length == 0) {
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throw new ClientException(_("No <A> tag in a <DT>."));
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}
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$title = $a->nodeValue;
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$url = $a->getAttribute('href');
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$tags = $a->getAttribute('tags');
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$addDate = $a->getAttribute('add_date');
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$created = common_sql_date(intval($addDate));
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$a = $as->item(0);
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$saved = Notice_bookmark::saveNew($user,
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$title,
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$url,
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$tags,
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$description,
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array('created' => $created));
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$private = $a->getAttribute('private');
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return $saved;
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}
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if ($private != 0) {
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throw new ClientException(_('Skipping private bookmark.'));
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}
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function importHTML($body)
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{
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if (!empty($dd)) {
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$description = $dd->nodeValue;
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} else {
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$description = null;
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}
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$title = $a->nodeValue;
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$url = $a->getAttribute('href');
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$tags = $a->getAttribute('tags');
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$addDate = $a->getAttribute('add_date');
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$created = common_sql_date(intval($addDate));
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$saved = Notice_bookmark::saveNew($user,
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$title,
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$url,
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$tags,
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$description,
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array('created' => $created));
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return $saved;
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}
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/**
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* Parse some HTML
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*
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* Hides the errors that the dom parser returns
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*
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* @param string $body Data to import
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*
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* @return DOMDocument parsed document
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*/
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function importHTML($body)
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{
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// DOMDocument::loadHTML may throw warnings on unrecognized elements,
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// and notices on unrecognized namespaces.
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$old = error_reporting(error_reporting() & ~(E_WARNING | E_NOTICE));
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$dom = new DOMDocument();
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$ok = $dom->loadHTML($body);
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$ok = $dom->loadHTML($body);
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error_reporting($old);
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if ($ok) {
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return $dom;
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} else {
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return null;
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}
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}
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if ($ok) {
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return $dom;
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} else {
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return null;
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}
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}
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}
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