144 lines
3.9 KiB
PHP
144 lines
3.9 KiB
PHP
<?php namespace ProcessWire;
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/**
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* ProcessWire Fuel
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*
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* Fuel maintains a single instance each of multiple objects used throughout the application.
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* The objects contained in fuel provide access to the ProcessWire API. For instance, $pages,
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* $users, $fields, and so on. The fuel is required to keep the system running, so to speak.
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*
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* This file is licensed under the MIT license
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* https://processwire.com/about/license/mit/
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*
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* ProcessWire 3.x, Copyright 2020 by Ryan Cramer
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* https://processwire.com
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*
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* @property ProcessWire $wire
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* @property Database $db
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* @property WireDatabasePDO $database
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* @property Session $session
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* @property Notices $notices
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* @property Sanitizer $sanitizer
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* @property Fields $fields
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* @property Fieldtypes $fieldtypes
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* @property Fieldgroups $fieldgroups
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* @property Templates $templates
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* @property Pages $pages
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* @property Page $page
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* @property Process $process
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* @property Modules $modules
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* @property Permissions $permissions
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* @property Roles $roles
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* @property Users $users
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* @property User $user
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* @property WireCache $cache
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* @property WireInput $input
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* @property Languages $languages If LanguageSupport installed
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* @property Config $config
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* @property Fuel $fuel
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* @property WireProfilerInterface $profiler
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* @property WireFileTools $files
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* @property WireMailTools $mail
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* @property WireDateTime $datetime
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*
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*/
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class Fuel implements \IteratorAggregate {
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/**
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* Fuel items indexed by name
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*
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* @var array
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*
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*/
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protected $data = array();
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/**
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* Array where name is item name, and value is bool as to whether it's locked or not
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*
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* @var array
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*
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*/
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protected $lock = array();
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/**
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* API vars that require specific interfaces
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*
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* @var array
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*
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*/
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protected $requiredInterfaces = array(
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'profiler' => 'WireProfilerInterface'
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);
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/**
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* The most common API variable names, those likely to be called multiple times in any request
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*
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* @var array
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*
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*/
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static protected $commonNames = array(
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'page' => 1, 'pages' => 1, 'session' => 1, 'input' => 1, 'sanitizer' => 1,
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'config' => 1, 'user' => 1, 'users' => 1, 'fields' => 1, 'templates' => 1,
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'database' => 1, 'modules' => 1, 'hooks' => 1,
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);
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/**
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* @param string $key API variable name to set - should be valid PHP variable name.
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* @param object|mixed $value Value for the API variable.
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* @param bool $lock Whether to prevent this API variable from being overwritten in the future.
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* @return $this
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* @throws WireException When you try to set a previously locked API variable, a WireException will be thrown.
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*
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*/
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public function set($key, $value, $lock = false) {
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if(isset($this->lock[$key]) && $value !== $this->data[$key]) {
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throw new WireException("API variable '$key' is locked and may not be set again");
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}
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if(isset($this->requiredInterfaces[$key])) {
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$requiredInterface = $this->requiredInterfaces[$key];
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$hasInterfaces = wireClassImplements($value, false);
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if(!isset($hasInterfaces[$requiredInterface]) && !in_array($requiredInterface, $hasInterfaces)) {
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throw new WireException("API variable '$key' must implement interface: $requiredInterface");
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}
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}
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$this->data[$key] = $value;
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if($lock) $this->lock[$key] = true;
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return $this;
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}
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/**
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* Remove an API variable from the Fuel
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*
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* @param $key
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* @return bool Returns true on success
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*
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*/
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public function remove($key) {
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if(isset($this->data[$key])) {
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unset($this->data[$key]);
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unset($this->lock[$key]);
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return true;
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}
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return false;
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}
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public function __get($key) {
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return isset($this->data[$key]) ? $this->data[$key] : null;
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}
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public function get($key) {
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return isset($this->data[$key]) ? $this->data[$key] : null;
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}
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public function getIterator() {
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return new \ArrayObject($this->data);
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}
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public function getArray() {
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return $this->data;
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}
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public static function isCommon($name) {
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return isset(self::$commonNames[$name]);
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}
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}
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