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<?php
/*
Copyright (c) 2009-2014 F3::Factory/Bong Cosca, All rights reserved.
This file is part of the Fat-Free Framework (http://fatfree.sf.net).
THE SOFTWARE AND DOCUMENTATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
PURPOSE.
Please see the license.txt file for more information.
*/
//! Session-based pseudo-mapper
class Basket {
//@{ Error messages
const
E_Field='Undefined field %s';
//@}
protected
//! Session key
$key,
//! Current item identifier
$id,
//! Current item contents
$item=array();
/**
* Return TRUE if field is defined
* @return bool
* @param $key string
**/
function exists($key) {
return array_key_exists($key,$this->item);
}
/**
* Assign value to field
* @return scalar|FALSE
* @param $key string
* @param $val scalar
**/
function set($key,$val) {
return ($key=='_id')?FALSE:($this->item[$key]=$val);
}
/**
* Retrieve value of field
* @return scalar|FALSE
* @param $key string
**/
function get($key) {
if ($key=='_id')
return $this->id;
if (array_key_exists($key,$this->item))
return $this->item[$key];
user_error(sprintf(self::E_Field,$key));
return FALSE;
}
/**
* Delete field
* @return NULL
* @param $key string
**/
function clear($key) {
unset($this->item[$key]);
}
/**
* Return items that match key/value pair;
* If no key/value pair specified, return all items
* @return array|FALSE
* @param $key string
* @param $val mixed
**/
function find($key=NULL,$val=NULL) {
if (isset($_SESSION[$this->key])) {
$out=array();
foreach ($_SESSION[$this->key] as $id=>$item)
if (!isset($key) ||
array_key_exists($key,$item) && $item[$key]==$val) {
$obj=clone($this);
$obj->id=$id;
$obj->item=$item;
$out[]=$obj;
}
return $out;
}
return FALSE;
}
/**
* Return first item that matches key/value pair
* @return object|FALSE
* @param $key string
* @param $val mixed
**/
function findone($key,$val) {
return ($data=$this->find($key,$val))?$data[0]:FALSE;
}
/**
* Map current item to matching key/value pair
* @return array
* @param $key string
* @param $val mixed
**/
function load($key,$val) {
if ($found=$this->find($key,$val)) {
$this->id=$found[0]->id;
return $this->item=$found[0]->item;
}
$this->reset();
return array();
}
/**
* Return TRUE if current item is empty/undefined
* @return bool
**/
function dry() {
return !$this->item;
}
/**
* Return number of items in basket
* @return int
**/
function count() {
return isset($_SESSION[$this->key])?count($_SESSION[$this->key]):0;
}
/**
* Save current item
* @return array
**/
function save() {
if (!$this->id)
$this->id=uniqid(NULL,TRUE);
$_SESSION[$this->key][$this->id]=$this->item;
return $this->item;
}
/**
* Erase item matching key/value pair
* @return bool
* @param $key string
* @param $val mixed
**/
function erase($key,$val) {
$found=$this->find($key,$val);
if ($found && $id=$found[0]->id) {
unset($_SESSION[$this->key][$id]);
if ($id==$this->id)
$this->reset();
return TRUE;
}
return FALSE;
}
/**
* Reset cursor
* @return NULL
**/
function reset() {
$this->id=NULL;
$this->item=array();
}
/**
* Empty basket
* @return NULL
**/
function drop() {
unset($_SESSION[$this->key]);
}
/**
* Hydrate item using hive array variable
* @return NULL
* @param $key string
**/
function copyfrom($key) {
foreach (\Base::instance()->get($key) as $key=>$val)
$this->item[$key]=$val;
}
/**
* Populate hive array variable with item contents
* @return NULL
* @param $key string
**/
function copyto($key) {
$var=&\Base::instance()->ref($key);
foreach ($this->item as $key=>$field)
$var[$key]=$field;
}
/**
* Check out basket contents
* @return array
**/
function checkout() {
if (isset($_SESSION[$this->key])) {
$out=$_SESSION[$this->key];
unset($_SESSION[$this->key]);
return $out;
}
return array();
}
/**
* Instantiate class
* @return void
* @param $key string
**/
function __construct($key='basket') {
$this->key=$key;
@session_start();
Base::instance()->sync('SESSION');
$this->reset();
}
}
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