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<?php |
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/* |
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* This file is part of the PhpBotFramework. |
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* |
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* PhpBotFramework is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as |
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* published by the Free Software Foundation, version 3. |
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* |
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* PhpBotFramework is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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namespace PhpBotFramework\Database; |
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use PDOException; |
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define('PDO_DEFAULT_ADAPTER', 'mysql'); |
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/** |
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* \addtogroup Modules |
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* @{ |
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*/ |
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/** \class Handler Handler Database connection handler |
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*/ |
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trait Handler |
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{ |
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/** @} */ |
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/** Pdo connection to the database. */ |
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public $pdo; |
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/** |
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* \addtogroup Bot Bot |
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* @{ |
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*/ |
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/** |
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* \brief Open a database connection using PDO. |
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* \details Provides a simpler way to initialize a database connection |
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* and create a PDO instance. |
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* @param array $params Parameters for initialize connection. |
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* Index required: |
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* - <code>username</code> |
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* - <code>password</code> (can be a null string) |
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* Optional index: |
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* - <code>adapter</code> <b>Default</b>: <code>mysql</code> |
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* - <code>host</code> <b>Default</b>: <code>localhost</code> |
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* - <code>options</code> (<i>Array of options passed when creating pdo object</i>) |
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* @return bool True when the connection is succefully created. |
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*/ |
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public function connect(array $params) : bool |
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{ |
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try { |
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$config = $this->getDNS($this->mergeWithDefaults($params)); |
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$this->pdo = new \PDO($config, $params['username'], $params['password'], $params['option']); |
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$this->pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION); |
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1 |
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return true; |
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} catch (PDOException $e) { |
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echo 'Unable to connect to database, an error occured:' . $e->getMessage(); |
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} |
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return false; |
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2 |
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} |
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/** \brief (<i>Internal</i>) Add default connection value to parameter passed to pdo. |
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* @param array $params Parameter for PDO connection. |
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* @return array Parameter with defaults value. |
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*/ |
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protected function addDefaultValue(array $params) : array |
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{ |
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static $defaults = [ 'adapter' => PDO_DEFAULT_ADAPTER, 'host' => 'localhost' ]; |
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return array_merge($defaults, $params); |
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} |
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/** \brief (<i>Internal</i>) Returns a string that can passed to PDO as DNS parameter in order to open connection. |
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* @param array $params Array containing parameter of the connection |
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* @return string Parameters contained in array $params sanitized in a string that can be passed as DNS param of PDO object creation. |
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*/ |
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protected function getDNS($params) : string |
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{ |
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$response = $params['adapter'] . ':'; |
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unset($params['adapter']); |
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2 |
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$fields = []; |
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foreach ($params as $field => $value) { |
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/** |
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*Check if the current field matches one of the fields |
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* that are passed to PDO in another way and so don't need |
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* to be included in the string. |
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*/ |
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if ($field === 'username' || $field === 'password') { |
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unset($params[$field]); |
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continue; |
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} |
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$fields[] = $field . '=' . $value; |
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} |
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return $response . join(';', $fields); |
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} |
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/** @} */ |
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} |
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DanySpin97 /
PhpBotFramework
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.