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signaturepdf/vendor/fatfree/lib/basket.php

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2021-05-03 19:26:47 +02:00
<?php
/*
Copyright (c) 2009-2019 F3::Factory/Bong Cosca, All rights reserved.
This file is part of the Fat-Free Framework (http://fatfreeframework.com).
This 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 3 of the License, or later.
Fat-Free Framework 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 Fat-Free Framework. If not, see <http://www.gnu.org/licenses/>.
*/
//! Session-based pseudo-mapper
class Basket extends Magic {
//@{ Error messages
const
E_Field='Undefined field %s';
//@}
protected
//! Session key
$key,
//! Current item identifier
$id,
//! Current item contents
$item=[];
/**
* 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),E_USER_ERROR);
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
* @param $key string
* @param $val mixed
**/
function find($key=NULL,$val=NULL) {
$out=[];
if (isset($_SESSION[$this->key])) {
foreach ($_SESSION[$this->key] as $id=>$item)
if (!isset($key) ||
array_key_exists($key,$item) && $item[$key]==$val ||
$key=='_id' && $id==$val) {
$obj=clone($this);
$obj->id=$id;
$obj->item=$item;
$out[]=$obj;
}
}
return $out;
}
/**
* 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;
}
$this->reset();
return [];
}
/**
* Return TRUE if current item is empty/undefined
* @return bool
**/
function dry() {
return !$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;
$this->item=[];
}
/**
* Empty basket
* @return NULL
**/
function drop() {
unset($_SESSION[$this->key]);
}
/**
* Hydrate item using hive array variable
* @return NULL
* @param $var array|string
**/
function copyfrom($var) {
if (is_string($var))
$var=\Base::instance()->$var;
foreach ($var as $key=>$val)
$this->set($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 [];
}
/**
* Instantiate class
* @return void
* @param $key string
**/
function __construct($key='basket') {
$this->key=$key;
if (session_status()!=PHP_SESSION_ACTIVE)
session_start();
Base::instance()->sync('SESSION');
$this->reset();
}
}