653 lines
17 KiB
PHP
653 lines
17 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Thomas Tanghus
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* @copyright 2012-2013 Thomas Tanghus <thomas@tanghus.net>
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* @copyright 2012 Bart Visscher bartv@thisnet.nl
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library 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
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Class for easily tagging objects by their id
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*
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* A tag can be e.g. 'Family', 'Work', 'Chore', 'Special Occation' or
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* anything else that is either parsed from a vobject or that the user chooses
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* to add.
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* Tag names are not case-sensitive, but will be saved with the case they
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* are entered in. If a user already has a tag 'family' for a type, and
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* tries to add a tag named 'Family' it will be silently ignored.
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*/
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namespace OC;
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class Tags implements \OCP\ITags {
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/**
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* Tags
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*
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* @var array
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*/
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private $tags = array();
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/**
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* Used for storing objectid/categoryname pairs while rescanning.
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*
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* @var array
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*/
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private static $relations = array();
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/**
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* Type
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*
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* @var string
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*/
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private $type = null;
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/**
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* User
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*
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* @var string
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*/
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private $user = null;
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const TAG_TABLE = '*PREFIX*vcategory';
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const RELATION_TABLE = '*PREFIX*vcategory_to_object';
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const TAG_FAVORITE = '_$!<Favorite>!$_';
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/**
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* Constructor.
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*
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* @param string $user The user whos data the object will operate on.
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* @param string $type
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*/
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public function __construct($user, $type, $defaultTags = array()) {
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$this->user = $user;
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$this->type = $type;
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$this->loadTags($defaultTags);
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}
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/**
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* Load tags from db.
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*
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*/
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protected function loadTags($defaultTags=array()) {
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$this->tags = array();
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$result = null;
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$sql = 'SELECT `id`, `category` FROM `' . self::TAG_TABLE . '` '
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. 'WHERE `uid` = ? AND `type` = ? ORDER BY `category`';
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try {
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$stmt = \OCP\DB::prepare($sql);
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$result = $stmt->execute(array($this->user, $this->type));
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if (\OCP\DB::isError($result)) {
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\OCP\Util::writeLog('core', __METHOD__. ', DB error: ' . \OCP\DB::getErrorMessage($result), \OCP\Util::ERROR);
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}
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
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\OCP\Util::ERROR);
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}
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if(!is_null($result)) {
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while( $row = $result->fetchRow()) {
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$this->tags[$row['id']] = $row['category'];
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}
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}
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if(count($defaultTags) > 0 && count($this->tags) === 0) {
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$this->addMultiple($defaultTags, true);
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}
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\OCP\Util::writeLog('core', __METHOD__.', tags: ' . print_r($this->tags, true),
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\OCP\Util::DEBUG);
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}
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/**
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* Check if any tags are saved for this type and user.
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*
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* @return boolean.
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*/
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public function isEmpty() {
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return count($this->tags) === 0;
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}
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/**
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* Get the tags for a specific user.
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*
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* This returns an array with id/name maps:
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* [
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* ['id' => 0, 'name' = 'First tag'],
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* ['id' => 1, 'name' = 'Second tag'],
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* ]
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*
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* @return array
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*/
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public function getTags() {
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if(!count($this->tags)) {
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return array();
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}
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$tags = array_values($this->tags);
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uasort($tags, 'strnatcasecmp');
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$tagMap = array();
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foreach($tags as $tag) {
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if($tag !== self::TAG_FAVORITE) {
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$tagMap[] = array(
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'id' => $this->array_searchi($tag, $this->tags),
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'name' => $tag
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);
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}
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}
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return $tagMap;
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}
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/**
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* Get the a list if items tagged with $tag.
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*
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* Throws an exception if the tag could not be found.
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*
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* @param string $tag Tag id or name.
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* @return array An array of object ids or false on error.
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*/
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public function getIdsForTag($tag) {
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$result = null;
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if(is_numeric($tag)) {
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$tagId = $tag;
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} elseif(is_string($tag)) {
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$tag = trim($tag);
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if($tag === '') {
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\OCP\Util::writeLog('core', __METHOD__.', Cannot use empty tag names', \OCP\Util::DEBUG);
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return false;
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}
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$tagId = $this->array_searchi($tag, $this->tags);
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}
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if($tagId === false) {
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$l10n = \OC_L10N::get('core');
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throw new \Exception(
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$l10n->t('Could not find category "%s"', $tag)
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);
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}
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$ids = array();
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$sql = 'SELECT `objid` FROM `' . self::RELATION_TABLE
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. '` WHERE `categoryid` = ?';
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try {
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$stmt = \OCP\DB::prepare($sql);
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$result = $stmt->execute(array($tagId));
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if (\OCP\DB::isError($result)) {
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\OCP\Util::writeLog('core', __METHOD__. 'DB error: ' . \OCP\DB::getErrorMessage($result), \OCP\Util::ERROR);
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return false;
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}
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
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\OCP\Util::ERROR);
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return false;
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}
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if(!is_null($result)) {
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while( $row = $result->fetchRow()) {
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$ids[] = (int)$row['objid'];
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}
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}
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return $ids;
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}
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/**
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* Checks whether a tag is already saved.
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*
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* @param string $name The name to check for.
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* @return bool
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*/
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public function hasTag($name) {
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return $this->in_arrayi($name, $this->tags);
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}
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/**
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* Add a new tag.
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*
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* @param string $name A string with a name of the tag
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* @return false|string the id of the added tag or false on error.
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*/
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public function add($name) {
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$name = trim($name);
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if($name === '') {
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\OCP\Util::writeLog('core', __METHOD__.', Cannot add an empty tag', \OCP\Util::DEBUG);
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return false;
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}
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if($this->hasTag($name)) {
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\OCP\Util::writeLog('core', __METHOD__.', name: ' . $name. ' exists already', \OCP\Util::DEBUG);
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return false;
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}
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try {
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$result = \OCP\DB::insertIfNotExist(
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self::TAG_TABLE,
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array(
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'uid' => $this->user,
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'type' => $this->type,
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'category' => $name,
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)
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);
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if (\OCP\DB::isError($result)) {
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\OCP\Util::writeLog('core', __METHOD__. 'DB error: ' . \OCP\DB::getErrorMessage($result), \OCP\Util::ERROR);
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return false;
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} elseif((int)$result === 0) {
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\OCP\Util::writeLog('core', __METHOD__.', Tag already exists: ' . $name, \OCP\Util::DEBUG);
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return false;
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}
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
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\OCP\Util::ERROR);
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return false;
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}
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$id = \OCP\DB::insertid(self::TAG_TABLE);
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\OCP\Util::writeLog('core', __METHOD__.', id: ' . $id, \OCP\Util::DEBUG);
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$this->tags[$id] = $name;
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return $id;
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}
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/**
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* Rename tag.
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*
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* @param string $from The name of the existing tag
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* @param string $to The new name of the tag.
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* @return bool
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*/
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public function rename($from, $to) {
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$from = trim($from);
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$to = trim($to);
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if($to === '' || $from === '') {
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\OCP\Util::writeLog('core', __METHOD__.', Cannot use empty tag names', \OCP\Util::DEBUG);
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return false;
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}
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$id = $this->array_searchi($from, $this->tags);
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if($id === false) {
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\OCP\Util::writeLog('core', __METHOD__.', tag: ' . $from. ' does not exist', \OCP\Util::DEBUG);
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return false;
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}
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$sql = 'UPDATE `' . self::TAG_TABLE . '` SET `category` = ? '
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. 'WHERE `uid` = ? AND `type` = ? AND `id` = ?';
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try {
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$stmt = \OCP\DB::prepare($sql);
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$result = $stmt->execute(array($to, $this->user, $this->type, $id));
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if (\OCP\DB::isError($result)) {
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\OCP\Util::writeLog('core', __METHOD__. 'DB error: ' . \OCP\DB::getErrorMessage($result), \OCP\Util::ERROR);
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return false;
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}
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
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\OCP\Util::ERROR);
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return false;
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}
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$this->tags[$id] = $to;
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return true;
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}
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/**
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* Add a list of new tags.
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*
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* @param string[] $names A string with a name or an array of strings containing
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* the name(s) of the to add.
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* @param bool $sync When true, save the tags
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* @param int|null $id int Optional object id to add to this|these tag(s)
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* @return bool Returns false on error.
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*/
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public function addMultiple($names, $sync=false, $id = null) {
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if(!is_array($names)) {
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$names = array($names);
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}
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$names = array_map('trim', $names);
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array_filter($names);
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$newones = array();
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foreach($names as $name) {
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if(($this->in_arrayi(
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$name, $this->tags) == false) && $name !== '') {
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$newones[] = $name;
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}
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if(!is_null($id) ) {
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// Insert $objectid, $categoryid pairs if not exist.
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self::$relations[] = array('objid' => $id, 'tag' => $name);
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}
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}
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$this->tags = array_merge($this->tags, $newones);
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if($sync === true) {
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$this->save();
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}
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return true;
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}
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/**
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* Save the list of tags and their object relations
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*/
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protected function save() {
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if(is_array($this->tags)) {
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foreach($this->tags as $tag) {
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try {
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\OCP\DB::insertIfNotExist(self::TAG_TABLE,
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array(
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'uid' => $this->user,
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'type' => $this->type,
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'category' => $tag,
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));
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
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\OCP\Util::ERROR);
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}
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}
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// reload tags to get the proper ids.
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$this->loadTags();
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// Loop through temporarily cached objectid/tagname pairs
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// and save relations.
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$tags = $this->tags;
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// For some reason this is needed or array_search(i) will return 0..?
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ksort($tags);
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foreach(self::$relations as $relation) {
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$tagId = $this->array_searchi($relation['tag'], $tags);
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\OCP\Util::writeLog('core', __METHOD__ . 'catid, ' . $relation['tag'] . ' ' . $tagId, \OCP\Util::DEBUG);
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if($tagId) {
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try {
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\OCP\DB::insertIfNotExist(self::RELATION_TABLE,
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array(
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'objid' => $relation['objid'],
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'categoryid' => $tagId,
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'type' => $this->type,
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));
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
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\OCP\Util::ERROR);
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}
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}
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}
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self::$relations = array(); // reset
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} else {
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\OCP\Util::writeLog('core', __METHOD__.', $this->tags is not an array! '
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. print_r($this->tags, true), \OCP\Util::ERROR);
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}
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}
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/**
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* Delete tags and tag/object relations for a user.
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*
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* For hooking up on post_deleteUser
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*
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* @param array
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*/
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public static function post_deleteUser($arguments) {
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// Find all objectid/tagId pairs.
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$result = null;
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try {
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$stmt = \OCP\DB::prepare('SELECT `id` FROM `' . self::TAG_TABLE . '` '
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. 'WHERE `uid` = ?');
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$result = $stmt->execute(array($arguments['uid']));
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if (\OCP\DB::isError($result)) {
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\OCP\Util::writeLog('core', __METHOD__. 'DB error: ' . \OCP\DB::getErrorMessage($result), \OCP\Util::ERROR);
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}
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
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\OCP\Util::ERROR);
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}
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if(!is_null($result)) {
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try {
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$stmt = \OCP\DB::prepare('DELETE FROM `' . self::RELATION_TABLE . '` '
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. 'WHERE `categoryid` = ?');
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while( $row = $result->fetchRow()) {
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try {
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$stmt->execute(array($row['id']));
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
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\OCP\Util::ERROR);
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}
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}
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
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\OCP\Util::ERROR);
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}
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}
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try {
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$stmt = \OCP\DB::prepare('DELETE FROM `' . self::TAG_TABLE . '` '
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. 'WHERE `uid` = ?');
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$result = $stmt->execute(array($arguments['uid']));
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if (\OCP\DB::isError($result)) {
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\OCP\Util::writeLog('core', __METHOD__. ', DB error: ' . \OCP\DB::getErrorMessage($result), \OCP\Util::ERROR);
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}
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__ . ', exception: '
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. $e->getMessage(), \OCP\Util::ERROR);
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}
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}
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/**
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* Delete tag/object relations from the db
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*
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* @param array $ids The ids of the objects
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* @return boolean Returns false on error.
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*/
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public function purgeObjects(array $ids) {
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if(count($ids) === 0) {
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// job done ;)
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return true;
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}
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$updates = $ids;
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try {
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$query = 'DELETE FROM `' . self::RELATION_TABLE . '` ';
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$query .= 'WHERE `objid` IN (' . str_repeat('?,', count($ids)-1) . '?) ';
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$query .= 'AND `type`= ?';
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$updates[] = $this->type;
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$stmt = \OCP\DB::prepare($query);
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$result = $stmt->execute($updates);
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if (\OCP\DB::isError($result)) {
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\OCP\Util::writeLog('core', __METHOD__. 'DB error: ' . \OCP\DB::getErrorMessage($result), \OCP\Util::ERROR);
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return false;
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}
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: ' . $e->getMessage(),
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\OCP\Util::ERROR);
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return false;
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}
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return true;
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}
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/**
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* Get favorites for an object type
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*
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* @return array An array of object ids.
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*/
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public function getFavorites() {
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try {
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return $this->getIdsForTag(self::TAG_FAVORITE);
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} catch(\Exception $e) {
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\OCP\Util::writeLog('core', __METHOD__.', exception: ' . $e->getMessage(),
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\OCP\Util::DEBUG);
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return array();
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}
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}
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/**
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* Add an object to favorites
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*
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* @param int $objid The id of the object
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* @return boolean
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*/
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public function addToFavorites($objid) {
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if(!$this->hasTag(self::TAG_FAVORITE)) {
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$this->add(self::TAG_FAVORITE);
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}
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return $this->tagAs($objid, self::TAG_FAVORITE);
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}
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/**
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* Remove an object from favorites
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*
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* @param int $objid The id of the object
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* @return boolean
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*/
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public function removeFromFavorites($objid) {
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return $this->unTag($objid, self::TAG_FAVORITE);
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}
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/**
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* Creates a tag/object relation.
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*
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* @param int $objid The id of the object
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* @param string $tag The id or name of the tag
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* @return boolean Returns false on error.
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*/
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public function tagAs($objid, $tag) {
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if(is_string($tag) && !is_numeric($tag)) {
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$tag = trim($tag);
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if($tag === '') {
|
|
\OCP\Util::writeLog('core', __METHOD__.', Cannot add an empty tag', \OCP\Util::DEBUG);
|
|
return false;
|
|
}
|
|
if(!$this->hasTag($tag)) {
|
|
$this->add($tag);
|
|
}
|
|
$tagId = $this->array_searchi($tag, $this->tags);
|
|
} else {
|
|
$tagId = $tag;
|
|
}
|
|
try {
|
|
\OCP\DB::insertIfNotExist(self::RELATION_TABLE,
|
|
array(
|
|
'objid' => $objid,
|
|
'categoryid' => $tagId,
|
|
'type' => $this->type,
|
|
));
|
|
} catch(\Exception $e) {
|
|
\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
|
|
\OCP\Util::ERROR);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Delete single tag/object relation from the db
|
|
*
|
|
* @param int $objid The id of the object
|
|
* @param string $tag The id or name of the tag
|
|
* @return boolean
|
|
*/
|
|
public function unTag($objid, $tag) {
|
|
if(is_string($tag) && !is_numeric($tag)) {
|
|
$tag = trim($tag);
|
|
if($tag === '') {
|
|
\OCP\Util::writeLog('core', __METHOD__.', Tag name is empty', \OCP\Util::DEBUG);
|
|
return false;
|
|
}
|
|
$tagId = $this->array_searchi($tag, $this->tags);
|
|
} else {
|
|
$tagId = $tag;
|
|
}
|
|
|
|
try {
|
|
$sql = 'DELETE FROM `' . self::RELATION_TABLE . '` '
|
|
. 'WHERE `objid` = ? AND `categoryid` = ? AND `type` = ?';
|
|
$stmt = \OCP\DB::prepare($sql);
|
|
$stmt->execute(array($objid, $tagId, $this->type));
|
|
} catch(\Exception $e) {
|
|
\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
|
|
\OCP\Util::ERROR);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Delete tags from the
|
|
*
|
|
* @param string[] $names An array of tags to delete
|
|
* @return bool Returns false on error
|
|
*/
|
|
public function delete($names) {
|
|
if(!is_array($names)) {
|
|
$names = array($names);
|
|
}
|
|
|
|
$names = array_map('trim', $names);
|
|
array_filter($names);
|
|
|
|
\OCP\Util::writeLog('core', __METHOD__ . ', before: '
|
|
. print_r($this->tags, true), \OCP\Util::DEBUG);
|
|
foreach($names as $name) {
|
|
$id = null;
|
|
|
|
if($this->hasTag($name)) {
|
|
$id = $this->array_searchi($name, $this->tags);
|
|
unset($this->tags[$id]);
|
|
}
|
|
try {
|
|
$stmt = \OCP\DB::prepare('DELETE FROM `' . self::TAG_TABLE . '` WHERE '
|
|
. '`uid` = ? AND `type` = ? AND `category` = ?');
|
|
$result = $stmt->execute(array($this->user, $this->type, $name));
|
|
if (\OCP\DB::isError($result)) {
|
|
\OCP\Util::writeLog('core', __METHOD__. 'DB error: ' . \OCP\DB::getErrorMessage($result), \OCP\Util::ERROR);
|
|
}
|
|
} catch(\Exception $e) {
|
|
\OCP\Util::writeLog('core', __METHOD__ . ', exception: '
|
|
. $e->getMessage(), \OCP\Util::ERROR);
|
|
return false;
|
|
}
|
|
if(!is_null($id) && $id !== false) {
|
|
try {
|
|
$sql = 'DELETE FROM `' . self::RELATION_TABLE . '` '
|
|
. 'WHERE `categoryid` = ?';
|
|
$stmt = \OCP\DB::prepare($sql);
|
|
$result = $stmt->execute(array($id));
|
|
if (\OCP\DB::isError($result)) {
|
|
\OCP\Util::writeLog('core',
|
|
__METHOD__. 'DB error: ' . \OCP\DB::getErrorMessage($result),
|
|
\OCP\Util::ERROR);
|
|
return false;
|
|
}
|
|
} catch(\Exception $e) {
|
|
\OCP\Util::writeLog('core', __METHOD__.', exception: '.$e->getMessage(),
|
|
\OCP\Util::ERROR);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// case-insensitive in_array
|
|
private function in_arrayi($needle, $haystack) {
|
|
if(!is_array($haystack)) {
|
|
return false;
|
|
}
|
|
return in_array(strtolower($needle), array_map('strtolower', $haystack));
|
|
}
|
|
|
|
// case-insensitive array_search
|
|
private function array_searchi($needle, $haystack) {
|
|
if(!is_array($haystack)) {
|
|
return false;
|
|
}
|
|
return array_search(strtolower($needle), array_map('strtolower', $haystack));
|
|
}
|
|
}
|