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<?php |
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namespace Alpha\Util\Config; |
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use Alpha\Exception\IllegalArguementException; |
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use Alpha\Exception\PHPException; |
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/** |
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* A singleton config class. |
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* |
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* @since 1.0 |
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* |
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* @author John Collins <[email protected]> |
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* @license http://www.opensource.org/licenses/bsd-license.php The BSD License |
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* @copyright Copyright (c) 2018, John Collins (founder of Alpha Framework). |
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* All rights reserved. |
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* |
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* <pre> |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the |
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* following conditions are met: |
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* |
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* * Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the |
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* following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the |
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* following disclaimer in the documentation and/or other |
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* materials provided with the distribution. |
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* * Neither the name of the Alpha Framework nor the names |
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* of its contributors may be used to endorse or promote |
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* products derived from this software without specific |
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* prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* </pre> |
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*/ |
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class ConfigProvider |
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{ |
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/** |
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* Array to store the config variables. |
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* |
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* @var array |
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* |
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* @since 1.0 |
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*/ |
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private $configVars = array(); |
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/** |
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* The config object singleton. |
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* |
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* @var \Alpha\Util\Config\ConfigProvider |
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* |
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* @since 1.0 |
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*/ |
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private static $instance; |
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/** |
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* The config environment (dev, pro, test). |
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* |
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* @var string |
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* |
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* @since 2.0 |
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*/ |
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private $environment; |
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/** |
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* Private constructor means the class cannot be instantiated from elsewhere. |
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* |
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* @since 1.0 |
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*/ |
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private function __construct() |
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{ |
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} |
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/** |
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* Get the config object instance. |
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* |
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* @return \Alpha\Util\Config\ConfigProvider|Alpha\Util\Config\ConfigCallbacks |
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* |
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* @since 1.0 |
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*/ |
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public static function getInstance() |
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{ |
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if (!isset(self::$instance)) { |
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self::$instance = new self(); |
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self::$instance->setRootPath(); |
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// check to see if a child class with callbacks has been implemented |
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if (file_exists(self::$instance->get('rootPath').'config/ConfigCallbacks.inc')) { |
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require_once self::$instance->get('rootPath').'config/ConfigCallbacks.inc'; |
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self::$instance = new ConfigCallbacks(); |
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self::$instance->setRootPath(); |
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} |
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// populate the config from the ini file |
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self::$instance->loadConfig(); |
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} |
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return self::$instance; |
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} |
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/** |
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* Get config value. |
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* |
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* @param string $key string |
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* |
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* @return string |
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* |
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* @throws \Alpha\Exception\IllegalArguementException |
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* |
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* @since 1.0 |
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*/ |
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public function get($key) |
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{ |
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if (array_key_exists($key, $this->configVars)) { |
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return $this->configVars[$key]; |
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} else { |
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throw new IllegalArguementException('The config property ['.$key.'] is not set in the .ini config file'); |
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} |
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} |
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/** |
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* Set config value. |
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* |
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* @param $key string |
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* @param $val string |
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* |
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* @since 1.0 |
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*/ |
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public function set($key, $val) |
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{ |
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/* |
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* If you need to alter a config option after it has been set in the .ini |
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* files, you can override this class and implement this callback method |
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*/ |
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if (method_exists($this, 'before_set_callback')) { |
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$val = $this->{'before_set_callback('.$key.', '.$val.', '.$this->configVars.')'}; |
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} |
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$this->configVars[$key] = $val; |
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} |
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/** |
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* Sets the root directory of the application. |
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* |
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* @since 1.0 |
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*/ |
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private function setRootPath() |
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{ |
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if (strpos(__DIR__, 'vendor/alphadevx/alpha/Alpha/Util/Config') !== false) { |
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$this->set('rootPath', str_replace('vendor/alphadevx/alpha/Alpha/Util/Config', '', __DIR__)); |
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} else { |
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$this->set('rootPath', str_replace('Alpha/Util/Config', '', __DIR__)); |
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} |
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} |
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/** |
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* Reloads the config from the relevent .ini file, dependant upon the current |
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* environment (hostname). |
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* |
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* @since 2.0.1 |
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*/ |
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public function reloadConfig() |
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{ |
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$this->setRootPath(); |
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$this->loadConfig(); |
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} |
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/** |
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* Loads the config from the relevent .ini file, dependant upon the current |
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* environment (hostname). |
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* |
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* @throws \Alpha\Exception\PHPException |
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* |
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* @since 1.0 |
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*/ |
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private function loadConfig() |
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{ |
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$rootPath = $this->get('rootPath'); |
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// first we need to see if we are in dev, pro or test environment |
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if (isset($_SERVER['SERVER_NAME'])) { |
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$server = $_SERVER['SERVER_NAME']; |
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} elseif (isset($_ENV['HOSTNAME'])) { |
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// we may be running in CLI mode |
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$server = $_ENV['HOSTNAME']; |
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} elseif (php_uname('n') != '') { |
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// CLI on Linux or Windows should have this |
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$server = php_uname('n'); |
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} else { |
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throw new PHPException('Unable to determine the server name'); |
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} |
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// Load the servers to see which environment the current server is set as |
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$serverIni = $rootPath.'config/servers.ini'; |
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if (file_exists($serverIni)) { |
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$envs = parse_ini_file($serverIni); |
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$environment = ''; |
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foreach ($envs as $env => $serversList) { |
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$servers = explode(',', $serversList); |
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if (in_array($server, $servers)) { |
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$environment = $env; |
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} |
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} |
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if ($environment == '') { |
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throw new PHPException('No environment configured for the server '.$server); |
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} |
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} else { |
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throw new PHPException('Failed to load the config file ['.$serverIni.']'); |
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} |
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$this->environment = $environment; |
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if (mb_substr($environment, -3) == 'CLI') { // CLI mode |
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$envIni = $rootPath.'config/'.mb_substr($environment, 0, 3).'.ini'; |
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} else { |
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$envIni = $rootPath.'config/'.$environment.'.ini'; |
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} |
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if (!file_exists($envIni)) { |
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throw new PHPException('Failed to load the config file ['.$envIni.']'); |
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} |
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$configArray = parse_ini_file($envIni); |
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foreach (array_keys($configArray) as $key) { |
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$this->set($key, $configArray[$key]); |
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} |
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} |
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/** |
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* Get the configuration environment for this application. |
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* |
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* @return string |
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* |
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* @since 2.0 |
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*/ |
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public function getEnvironment() |
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{ |
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return $this->environment; |
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} |
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} |
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Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly.
For example, imagine you have a variable
$accountId
that can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to theid
property of an instance of theAccount
class. This class holds a proper account, so the id value must no longer be false.Either this assignment is in error or a type check should be added for that assignment.