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indefero/src/IDF/Gconf.php
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210
indefero/src/IDF/Gconf.php
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<?php
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/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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# ***** BEGIN LICENSE BLOCK *****
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# This file is part of InDefero, an open source project management application.
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# Copyright (C) 2008-2011 Céondo Ltd and contributors.
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#
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# InDefero is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# InDefero 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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#
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# ***** END LICENSE BLOCK ***** */
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/**
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* Configuration of the objects.
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*
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* It is just storing a list of key/value pairs associated to
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* different objects. If you use this table for your model, do not
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* forget to drop the corresponding keys in your preDelete call.
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*/
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class IDF_Gconf extends Pluf_Model
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{
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public $_model = __CLASS__;
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public $datacache = null;
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public $dirty = array();
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public $f = null;
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protected $_mod = null;
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/**
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* Do we (un)serialize the data when getting/setting them.
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*/
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public $serialize = false;
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function init()
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{
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$this->_a['table'] = 'idf_gconf';
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$this->_a['model'] = __CLASS__;
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$this->_a['cols'] = array(
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// It is mandatory to have an "id" column.
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'id' =>
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array(
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'type' => 'Pluf_DB_Field_Sequence',
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//It is automatically added.
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'blank' => true,
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),
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'model_class' =>
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array(
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'type' => 'Pluf_DB_Field_Varchar',
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'blank' => false,
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'size' => 150,
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'verbose' => __('model class'),
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),
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'model_id' =>
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array(
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'type' => 'Pluf_DB_Field_Integer',
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'blank' => false,
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'verbose' => __('model id'),
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),
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'vkey' =>
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array(
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'type' => 'Pluf_DB_Field_Varchar',
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'blank' => false,
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'size' => 50,
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'verbose' => __('key'),
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),
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'vdesc' =>
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array(
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'type' => 'Pluf_DB_Field_Text',
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'blank' => false,
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'verbose' => __('value'),
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),
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);
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$this->_a['idx'] = array('model_vkey_idx' =>
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array(
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'col' => 'model_class, model_id, vkey',
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'type' => 'unique',
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),
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);
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$this->f = new IDF_Config_DataProxy($this);
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}
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function setModel($model)
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{
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$this->datacache = null;
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$this->_mod = $model;
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}
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function initCache()
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{
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$this->datacache = array();
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$this->dirty = array();
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$sql = new Pluf_SQL('model_class=%s AND model_id=%s',
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array($this->_mod->_model, $this->_mod->id));
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foreach ($this->getList(array('filter' => $sql->gen())) as $val) {
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$this->datacache[$val->vkey] = ($this->serialize) ? unserialize($val->vdesc) : $val->vdesc;
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$this->dirty[$val->vkey] = $val->id;
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}
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}
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/**
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* FIXME: This is not efficient when setting a large number of
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* values in a loop.
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*/
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function setVal($key, $value)
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{
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if (!is_null($this->getVal($key, null))
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and $value == $this->getVal($key)) {
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return;
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}
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$svalue = ($this->serialize) ? serialize($value) : $value;
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if (isset($this->dirty[$key])) {
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// we get to check if deleted by other process + update
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$conf = new IDF_Gconf($this->dirty[$key]);
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if ($conf->id == $this->dirty[$key]) {
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$conf->vdesc = $svalue;
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$conf->update();
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$this->datacache[$key] = $value;
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return;
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}
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}
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// we insert
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$conf = new IDF_Gconf();
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$conf->model_class = $this->_mod->_model;
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$conf->model_id = $this->_mod->id;
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$conf->vkey = $key;
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$conf->vdesc = $svalue;
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$conf->create();
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$this->datacache[$key] = $value;
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$this->dirty[$key] = $conf->id;
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}
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function getVal($key, $default='')
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{
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if ($this->datacache === null) {
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$this->initCache();
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}
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return (isset($this->datacache[$key])) ? $this->datacache[$key] : $default;
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}
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function delVal($key, $initcache=true)
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{
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$gconf = new IDF_Gconf();
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$sql = new Pluf_SQL('vkey=%s AND model_class=%s AND model_id=%s', array($key, $this->_mod->_model, $this->_mod->id));
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foreach ($gconf->getList(array('filter' => $sql->gen())) as $c) {
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$c->delete();
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}
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if ($initcache) {
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$this->initCache();
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}
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}
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/**
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* Collection selection.
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*
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* Suppose you have 5 objects with associated meta data in the
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* Gconf storage, if you load the data independently for each
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* object, you end up with 5 SELECT queries. With 25 objects, 25
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* SELECT. You can select with one query all the data and merge in
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* the code. It is faster. The collection selection get a
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* model_class and a list of ids and returns an id indexed array
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* of associative array data. This is for read only access as you
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* do not get a series of Gconf objects.
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*/
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public static function collect($class, $ids)
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{
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$gconf = new IDF_Gconf();
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$stmpl = sprintf('model_class=%%s AND model_id IN (%s)',
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implode(',' , $ids));
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$sql = new Pluf_SQL($stmpl, array($class));
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$out = array_fill_keys($ids, array());
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foreach ($gconf->getList(array('filter' => $sql->gen())) as $c) {
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$out[$c->model_id][$c->vkey] = $c->vdesc;
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}
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return $out;
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}
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/**
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* Drop the conf of a model.
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*
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* If your model is using this table, just add the following line
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* in your preDelete() method:
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*
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* IDF_Gconf::dropForModel($this)
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*
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* It will take care of the cleaning.
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*/
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static public function dropForModel($model)
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{
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$table = Pluf::factory(__CLASS__)->getSqlTable();
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$sql = new Pluf_SQL('model_class=%s AND model_id=%s',
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array($model->_model, $model->id));
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$db = &Pluf::db();
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$db->execute('DELETE FROM '.$table.' WHERE '.$sql->gen());
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}
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static public function dropUser($signal, &$params)
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{
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self::dropForModel($params['user']);
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}
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}
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