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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2011 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
abstract class Display_Context_Core {
private $_display_context_name;
private $_data;
static function factory($display_context_name=null) {
if (empty($display_context_name)) {
$display_context_id = Session::instance()->get("display_context_id", "");
$context = Cache::instance()->get($display_context_id, null);
$context = empty($context) ? new Item_Display_Context() : unserialize($context);
} else {
$class_prefix = ucfirst(strtolower($display_context_name));
$class_name = "{$class_prefix}_Display_Context";
$context = new $class_name();
}
return $context;
}
protected function __construct($display_context_name) {
// $this->reset($display_context_name);
$this->_data = array();
$this->_display_context_name = $display_context_name;
}
final function get($key) {
return empty($this->_data[$key]) ? null : $this->_data[$key];
}
final function set($key, $value=null) {
if (is_array($key)) {
if ((array)$key == $key) {
$this->_data = array_merge($this->_data, $key);
} else {
$this->_data = array_merge($this->_data, array_fill_keys($key, $value));
}
} else {
$this->_data[$key] = $value;
}
return $this;
}
final function save() {
$context_data = serialize($this);
$display_context_id = "display_context_" . md5($context_data);
Session::instance()->set("display_context_id", $display_context_id);
Cache::instance()->set($display_context_id, $context_data);
return $this;
}
abstract function display_context($item);
}
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