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487 lines
16 KiB
487 lines
16 KiB
<?php
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/**
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* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
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* @link https://cakephp.org CakePHP(tm) Project
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* @since 1.0.0
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* @license https://opensource.org/licenses/mit-license.php MIT License
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*/
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namespace Cake\Core;
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use Cake\Cache\Cache;
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use Cake\Core\Configure\ConfigEngineInterface;
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use Cake\Core\Configure\Engine\PhpConfig;
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use Cake\Core\Exception\Exception;
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use Cake\Utility\Hash;
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use RuntimeException;
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/**
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* Configuration class. Used for managing runtime configuration information.
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*
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* Provides features for reading and writing to the runtime configuration, as well
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* as methods for loading additional configuration files or storing runtime configuration
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* for future use.
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*
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* @link https://book.cakephp.org/3/en/development/configuration.html
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*/
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class Configure
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{
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/**
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* Array of values currently stored in Configure.
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*
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* @var array
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*/
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protected static $_values = [
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'debug' => false,
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];
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/**
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* Configured engine classes, used to load config files from resources
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*
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* @see \Cake\Core\Configure::load()
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* @var \Cake\Core\Configure\ConfigEngineInterface[]
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*/
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protected static $_engines = [];
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/**
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* Flag to track whether or not ini_set exists.
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*
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* @var bool|null
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*/
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protected static $_hasIniSet;
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/**
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* Used to store a dynamic variable in Configure.
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*
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* Usage:
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* ```
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* Configure::write('One.key1', 'value of the Configure::One[key1]');
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* Configure::write(['One.key1' => 'value of the Configure::One[key1]']);
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* Configure::write('One', [
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* 'key1' => 'value of the Configure::One[key1]',
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* 'key2' => 'value of the Configure::One[key2]'
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* ]);
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*
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* Configure::write([
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* 'One.key1' => 'value of the Configure::One[key1]',
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* 'One.key2' => 'value of the Configure::One[key2]'
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* ]);
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* ```
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*
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* @param string|array $config The key to write, can be a dot notation value.
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* Alternatively can be an array containing key(s) and value(s).
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* @param mixed $value Value to set for var
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* @return bool True if write was successful
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* @link https://book.cakephp.org/3/en/development/configuration.html#writing-configuration-data
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*/
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public static function write($config, $value = null)
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{
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if (!is_array($config)) {
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$config = [$config => $value];
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}
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foreach ($config as $name => $value) {
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static::$_values = Hash::insert(static::$_values, $name, $value);
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}
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if (isset($config['debug'])) {
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if (static::$_hasIniSet === null) {
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static::$_hasIniSet = function_exists('ini_set');
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}
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if (static::$_hasIniSet) {
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ini_set('display_errors', $config['debug'] ? '1' : '0');
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}
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}
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return true;
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}
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/**
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* Used to read information stored in Configure. It's not
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* possible to store `null` values in Configure.
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*
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* Usage:
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* ```
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* Configure::read('Name'); will return all values for Name
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* Configure::read('Name.key'); will return only the value of Configure::Name[key]
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* ```
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*
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* @param string|null $var Variable to obtain. Use '.' to access array elements.
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* @param mixed $default The return value when the configure does not exist
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* @return mixed Value stored in configure, or null.
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* @link https://book.cakephp.org/3/en/development/configuration.html#reading-configuration-data
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*/
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public static function read($var = null, $default = null)
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{
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if ($var === null) {
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return static::$_values;
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}
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return Hash::get(static::$_values, $var, $default);
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}
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/**
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* Returns true if given variable is set in Configure.
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*
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* @param string $var Variable name to check for
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* @return bool True if variable is there
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*/
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public static function check($var)
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{
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if (empty($var)) {
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return false;
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}
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return static::read($var) !== null;
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}
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/**
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* Used to get information stored in Configure. It's not
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* possible to store `null` values in Configure.
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*
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* Acts as a wrapper around Configure::read() and Configure::check().
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* The configure key/value pair fetched via this method is expected to exist.
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* In case it does not an exception will be thrown.
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*
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* Usage:
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* ```
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* Configure::readOrFail('Name'); will return all values for Name
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* Configure::readOrFail('Name.key'); will return only the value of Configure::Name[key]
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* ```
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*
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* @param string $var Variable to obtain. Use '.' to access array elements.
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* @return mixed Value stored in configure.
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* @throws \RuntimeException if the requested configuration is not set.
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* @link https://book.cakephp.org/3/en/development/configuration.html#reading-configuration-data
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*/
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public static function readOrFail($var)
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{
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if (static::check($var) === false) {
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throw new RuntimeException(sprintf('Expected configuration key "%s" not found.', $var));
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}
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return static::read($var);
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}
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/**
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* Used to delete a variable from Configure.
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*
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* Usage:
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* ```
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* Configure::delete('Name'); will delete the entire Configure::Name
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* Configure::delete('Name.key'); will delete only the Configure::Name[key]
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* ```
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*
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* @param string $var the var to be deleted
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* @return void
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* @link https://book.cakephp.org/3/en/development/configuration.html#deleting-configuration-data
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*/
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public static function delete($var)
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{
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static::$_values = Hash::remove(static::$_values, $var);
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}
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/**
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* Used to consume information stored in Configure. It's not
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* possible to store `null` values in Configure.
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*
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* Acts as a wrapper around Configure::consume() and Configure::check().
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* The configure key/value pair consumed via this method is expected to exist.
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* In case it does not an exception will be thrown.
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*
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* @param string $var Variable to consume. Use '.' to access array elements.
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* @return mixed Value stored in configure.
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* @throws \RuntimeException if the requested configuration is not set.
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* @since 3.6.0
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*/
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public static function consumeOrFail($var)
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{
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if (static::check($var) === false) {
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throw new RuntimeException(sprintf('Expected configuration key "%s" not found.', $var));
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}
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return static::consume($var);
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}
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/**
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* Used to read and delete a variable from Configure.
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*
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* This is primarily used during bootstrapping to move configuration data
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* out of configure into the various other classes in CakePHP.
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*
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* @param string $var The key to read and remove.
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* @return array|string|null
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*/
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public static function consume($var)
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{
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if (strpos($var, '.') === false) {
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if (!isset(static::$_values[$var])) {
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return null;
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}
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$value = static::$_values[$var];
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unset(static::$_values[$var]);
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return $value;
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}
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$value = Hash::get(static::$_values, $var);
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static::delete($var);
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return $value;
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}
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/**
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* Add a new engine to Configure. Engines allow you to read configuration
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* files in various formats/storage locations. CakePHP comes with two built-in engines
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* PhpConfig and IniConfig. You can also implement your own engine classes in your application.
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*
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* To add a new engine to Configure:
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*
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* ```
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* Configure::config('ini', new IniConfig());
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* ```
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*
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* @param string $name The name of the engine being configured. This alias is used later to
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* read values from a specific engine.
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* @param \Cake\Core\Configure\ConfigEngineInterface $engine The engine to append.
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* @return void
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*/
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public static function config($name, ConfigEngineInterface $engine)
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{
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static::$_engines[$name] = $engine;
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}
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/**
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* Gets the names of the configured Engine objects.
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*
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* Checking if a specific engine has been configured with this method is deprecated.
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* Use Configure::isConfigured() instead.
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*
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* @param string|null $name Engine name.
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* @return string[]|bool Array of the configured Engine objects, bool for specific name.
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*/
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public static function configured($name = null)
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{
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if ($name !== null) {
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deprecationWarning(
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'Checking for a named engine with configured() is deprecated. ' .
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'Use Configure::isConfigured() instead.'
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);
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return isset(static::$_engines[$name]);
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}
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return array_keys(static::$_engines);
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}
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/**
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* Returns true if the Engine objects is configured.
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*
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* @param string $name Engine name.
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* @return bool
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*/
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public static function isConfigured($name)
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{
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return isset(static::$_engines[$name]);
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}
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/**
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* Remove a configured engine. This will unset the engine
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* and make any future attempts to use it cause an Exception.
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*
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* @param string $name Name of the engine to drop.
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* @return bool Success
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*/
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public static function drop($name)
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{
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if (!isset(static::$_engines[$name])) {
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return false;
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}
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unset(static::$_engines[$name]);
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return true;
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}
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/**
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* Loads stored configuration information from a resource. You can add
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* config file resource engines with `Configure::config()`.
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*
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* Loaded configuration information will be merged with the current
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* runtime configuration. You can load configuration files from plugins
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* by preceding the filename with the plugin name.
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*
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* `Configure::load('Users.user', 'default')`
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*
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* Would load the 'user' config file using the default config engine. You can load
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* app config files by giving the name of the resource you want loaded.
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*
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* ```
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* Configure::load('setup', 'default');
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* ```
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*
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* If using `default` config and no engine has been configured for it yet,
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* one will be automatically created using PhpConfig
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*
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* @param string $key name of configuration resource to load.
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* @param string $config Name of the configured engine to use to read the resource identified by $key.
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* @param bool $merge if config files should be merged instead of simply overridden
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* @return bool False if file not found, true if load successful.
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* @link https://book.cakephp.org/3/en/development/configuration.html#reading-and-writing-configuration-files
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*/
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public static function load($key, $config = 'default', $merge = true)
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{
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$engine = static::_getEngine($config);
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if (!$engine) {
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return false;
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}
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$values = $engine->read($key);
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if ($merge) {
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$values = Hash::merge(static::$_values, $values);
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}
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return static::write($values);
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}
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/**
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* Dump data currently in Configure into $key. The serialization format
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* is decided by the config engine attached as $config. For example, if the
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* 'default' adapter is a PhpConfig, the generated file will be a PHP
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* configuration file loadable by the PhpConfig.
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*
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* ### Usage
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*
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* Given that the 'default' engine is an instance of PhpConfig.
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* Save all data in Configure to the file `my_config.php`:
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*
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* ```
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* Configure::dump('my_config', 'default');
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* ```
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*
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* Save only the error handling configuration:
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*
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* ```
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* Configure::dump('error', 'default', ['Error', 'Exception'];
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* ```
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*
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* @param string $key The identifier to create in the config adapter.
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* This could be a filename or a cache key depending on the adapter being used.
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* @param string $config The name of the configured adapter to dump data with.
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* @param string[] $keys The name of the top-level keys you want to dump.
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* This allows you save only some data stored in Configure.
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* @return bool Success
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* @throws \Cake\Core\Exception\Exception if the adapter does not implement a `dump` method.
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*/
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public static function dump($key, $config = 'default', $keys = [])
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{
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$engine = static::_getEngine($config);
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if (!$engine) {
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throw new Exception(sprintf('There is no "%s" config engine.', $config));
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}
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$values = static::$_values;
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if (!empty($keys) && is_array($keys)) {
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$values = array_intersect_key($values, array_flip($keys));
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}
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return (bool)$engine->dump($key, $values);
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}
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/**
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* Get the configured engine. Internally used by `Configure::load()` and `Configure::dump()`
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* Will create new PhpConfig for default if not configured yet.
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*
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* @param string $config The name of the configured adapter
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* @return \Cake\Core\Configure\ConfigEngineInterface|false Engine instance or false
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*/
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protected static function _getEngine($config)
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{
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if (!isset(static::$_engines[$config])) {
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if ($config !== 'default') {
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return false;
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}
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static::config($config, new PhpConfig());
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}
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return static::$_engines[$config];
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}
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/**
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* Used to determine the current version of CakePHP.
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*
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* Usage
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* ```
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* Configure::version();
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* ```
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*
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* @return string Current version of CakePHP
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*/
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public static function version()
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{
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if (!isset(static::$_values['Cake']['version'])) {
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$config = require CORE_PATH . 'config/config.php';
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static::write($config);
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}
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return static::$_values['Cake']['version'];
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}
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/**
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* Used to write runtime configuration into Cache. Stored runtime configuration can be
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* restored using `Configure::restore()`. These methods can be used to enable configuration managers
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* frontends, or other GUI type interfaces for configuration.
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*
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* @param string $name The storage name for the saved configuration.
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* @param string $cacheConfig The cache configuration to save into. Defaults to 'default'
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* @param array|null $data Either an array of data to store, or leave empty to store all values.
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* @return bool Success
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*/
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public static function store($name, $cacheConfig = 'default', $data = null)
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{
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if ($data === null) {
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$data = static::$_values;
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}
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if (!class_exists(Cache::class)) {
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throw new RuntimeException('You must install cakephp/cache to use Configure::store()');
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}
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return Cache::write($name, $data, $cacheConfig);
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}
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/**
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* Restores configuration data stored in the Cache into configure. Restored
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* values will overwrite existing ones.
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*
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* @param string $name Name of the stored config file to load.
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* @param string $cacheConfig Name of the Cache configuration to read from.
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* @return bool Success.
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*/
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public static function restore($name, $cacheConfig = 'default')
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{
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if (!class_exists(Cache::class)) {
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throw new RuntimeException('You must install cakephp/cache to use Configure::restore()');
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}
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$values = Cache::read($name, $cacheConfig);
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if ($values) {
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return static::write($values);
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}
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return false;
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}
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/**
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* Clear all values stored in Configure.
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*
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* @return bool success.
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*/
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public static function clear()
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{
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static::$_values = [];
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return true;
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}
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}
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