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<?php
/**
* ownCloud
*
* @author Thomas Tanghus
* @copyright 2012 Thomas Tanghus <thomas@tanghus.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* Class for easy access to categories in VCARD, VEVENT, VTODO and VJOURNAL.
* A Category can be e.g. 'Family', 'Work', 'Chore', 'Special Occation' or anything else
* that is either parsed from a vobject or that the user chooses to add.
* Category names are not case-sensitive, but will be saved with the case they are
* entered in. If a user already has a category 'family' for an app, and tries to add
* a category named 'Family' it will be silently ignored.
*/
OC_HOOK::connect('OC_User', 'post_deleteUser', 'OC_VCategories', 'deleteUser');
class OC_VCategories {
/**
* cache
*/
protected static $cache = array();
/**
* Categories
*/
private $categories = array();
/**
* @brief Constructor.
* @param $app The application identifier e.g. 'contacts' or 'calendar'.
*/
public function __construct($app, $user=null) {
if(is_null($user)) {
$user = OC_User::getUser();
}
// Use cache if possible - I doubt this is ever the case. Copy/paste from OC_L10N.
if(array_key_exists($app.'::'.$user, self::$cache)){
OC_Log::write('core','OC_Categories::ctor, using cache', OC_Log::DEBUG);
$this->categories = self::$cache[$app.'::'.$user];
} else {
$result = null;
try {
$stmt = OC_DB::prepare('SELECT DISTINCT name FROM *PREFIX*categories WHERE userid = ? AND appid = ? ORDER BY name');
$result = $stmt->execute(array($user, $app));
} catch(Exception $e) {
OC_Log::write('core','OC_VCategories::ctor, exception: '.$e->getMessage(), OC_Log::ERROR);
OC_Log::write('core','OC_VCategories::ctor, app: '.$app.', user: '.$user, OC_Log::ERROR);
}
if(!is_null($result)) {
while( $row = $result->fetchRow()){
$this->categories[] = $row['name'];
}
self::$cache[$app.'::'.$user] = $this->categories;
}
}
}
/**
* @brief Get the categories for a specific.
* @returns array containing the categories as strings.
*/
public function categories() {
return $this->categories;
}
/**
* @brief Checks whether a category is already saved.
* @param $name The name to check for.
* @returns bool
*/
public function hasCategory($name) {
return ($this->in_arrayi($name, $this->categories) == false ? false : true);
}
/**
* @brief Add a new category name.
* @param $names A string with a name or an array of strings containing the name(s) of the categor(y|ies) to add.
* @returns bool Returns false on error.
*/
public function add($app, $names) {
$user = OC_User::getUser();
$newones = array();
if(!is_array($names)) {
$names = array($names);
}
$names = array_map('trim', $names);
foreach($names as $name) {
if(($this->in_arrayi($name, $this->categories) == false) && $name != '') {
$newones[] = $name;
}
}
if(count($newones) > 0) {
$stmt = OC_DB::prepare( 'INSERT INTO *PREFIX*categories (userid,appid,name) VALUES(?,?,?)' );
foreach($newones as $name) {
$this->categories[] = $name;
try {
$result = $stmt->execute(array($user, $app, $name));
} catch(Exception $e) {
OC_Log::write('core','OC_VCategories::add, exception: '.$e->getMessage(), OC_Log::ERROR);
OC_Log::write('core','OC_VCategories::add, app: '.$app.', user: '.$user.', name: '.$name, OC_Log::ERROR);
return false;
}
}
natcasesort($this->categories); // Dunno if this is necessary
}
return true;
}
/**
* @brief Extracts categories from a vobject and add the ones not already present.
* @param $vobject The instance of OC_VObject to load the categories from.
* @returns bool Returns false if the name already exist (case insensitive) or on error.
*/
public function loadFromVObject($app, $vobject) {
$this->add($vobject->getAsArray('CATEGORIES'));
}
/**
* @brief Delete a category from the db and from all the vobject supplied
* @param $app
* @param $name
* @param $objects An array of arrays with [id,vobject] (as text) pairs suitable for updating the apps object table.
*/
public function delete($app, $name, array &$objects) {
if(!$this->hasCategory($name)) {
return;
}
try {
$stmt = OC_DB::prepare('DELETE FROM *PREFIX*categories WHERE UPPER(name) = ?');
$result = $stmt->execute(array(strtoupper($name),));
} catch(Exception $e) {
OC_Log::write('core','OC_VCategories::delete, exception: '.$e->getMessage(), OC_Log::ERROR);
OC_Log::write('core','OC_VCategories::delete, name: '.$name, OC_Log::ERROR);
return false;
}
unset($this->categories[$this->array_searchi($name, $this->categories)]);
foreach($objects as $key=>&$value) {
$vobject = OC_VObject::parse($value[1]);
if(!is_null($vobject)){
$categories = $vobject->getAsArray('CATEGORIES');
$idx = $this->array_searchi($name, $categories);
if($idx) {
unset($categories[$this->array_searchi($name, $categories)]);
$vobject->setString('CATEGORIES', implode(',', $categories));
$value[1] = $vobject->serialize();
$objects[$key] = $value;
}
} else {
OC_Log::write('core','OC_VCategories::delete, unable to parse. ID: '.$value[0].', '.substr($value[1], 0, 10).'(...)', OC_Log::DEBUG);
}
}
}
/**
* @brief Delete all categories for a specific user. Connected to OC_User::post_deleteUser
* @param $parameters The id of the user.
* @returns bool Returns false on error.
*/
public function deleteUser($parameters) {
$user = $parameters['uid'];
try {
$stmt = OC_DB::prepare('DELETE FROM *PREFIX*categories WHERE user = ?');
$result = $stmt->execute(array($user,));
} catch(Exception $e) {
OC_Log::write('core','OC_VCategories::deleteFromUser, exception: '.$e->getMessage(), OC_Log::ERROR);
OC_Log::write('core','OC_VCategories::deleteFromUser, user: '.$user, OC_Log::ERROR);
return false;
}
return true;
}
// case-insensitive in_array
private function in_arrayi($needle, $haystack) {
return in_array(strtolower($needle), array_map('strtolower', $haystack));
}
// case-insensitive array_search
private function array_searchi($needle, $haystack) {
return array_search(strtolower($needle),array_map('strtolower',$haystack));
}
}
?>
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