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<?php |
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/* |
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* The MIT License |
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* |
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* Copyright 2014 James Ekow Abaka Ainooson |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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namespace yentu\commands; |
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use clearice\io\Io; |
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use yentu\factories\DatabaseManipulatorFactory; |
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use yentu\Migrations; |
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use yentu\Parameters; |
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use yentu\commands\Reversible; |
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use yentu\exceptions\CommandException; |
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/** |
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* The init command class. This command intiates a project for yentu migration |
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* by creating the required directories and configuration files. It also goes |
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* ahead to create the history table which exists in the database. |
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*/ |
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class Init extends Command implements Reversible |
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{ |
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private $io; |
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private $migrations; |
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private $manipulatorFactory; |
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public function __construct(Migrations $migrations, DatabaseManipulatorFactory $manipulatorFactory, Io $io) |
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{ |
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$this->migrations = $migrations; |
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$this->io = $io; |
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$this->manipulatorFactory = $manipulatorFactory; |
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} |
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private function getParams() |
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{ |
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if (isset($this->options['interractive'])) { |
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$params['driver'] = $this->io->getResponse('Database type', ['required' => true, 'answers' => ['postgresql', 'mysql', 'sqlite']]); |
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if ($params['driver'] === 'sqlite') { |
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$params['file'] = $this->io->getResponse('Database file', ['required' => true]); |
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} else { |
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$params['host'] = $this->io->getResponse('Database host', ['default' => 'localhost']); |
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$params['port'] = $this->io->getResponse('Database port'); |
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$params['dbname'] = $this->io->getResponse('Database name',['required' => true]); |
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$params['user'] = $this->io->getResponse('Database user name', ['required' => true]); |
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$params['password'] = $this->io->getResponse('Database password', ['required' => FALSE]); |
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} |
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} else { |
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$params = []; |
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foreach(['driver', 'file', 'host', 'port', 'dbname', 'user', 'password'] as $key) { |
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if(isset($this->options[$key])) { |
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$params[$key] = $this->options[$key]; |
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} |
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} |
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} |
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return $params; |
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} |
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public function createConfigFile($params) |
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{ |
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$params = Parameters::wrap( |
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$params, ['port', 'file', 'host', 'dbname', 'user', 'password'] |
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); |
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mkdir($this->migrations->getPath('')); |
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mkdir($this->migrations->getPath('config')); |
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mkdir($this->migrations->getPath('migrations')); |
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$configFile = new \yentu\CodeWriter(); |
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$configFile->add('return ['); |
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$configFile->addIndent(); |
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$configFile->add("'db' => ["); |
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$configFile->addIndent(); |
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$configFile->add("'driver' => '{$params['driver']}',"); |
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$configFile->add("'host' => '{$params['host']}',"); |
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$configFile->add("'port' => '{$params['port']}',"); |
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$configFile->add("'dbname' => '{$params['dbname']}',"); |
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$configFile->add("'user' => '{$params['user']}',"); |
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$configFile->add("'password' => '{$params['password']}',"); |
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$configFile->add("'file' => '{$params['file']}',"); |
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$configFile->decreaseIndent(); |
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$configFile->add(']'); |
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$configFile->decreaseIndent(); |
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$configFile->add('];'); |
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file_put_contents($this->migrations->getPath("config/default.conf.php"), $configFile); |
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return $params; |
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} |
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/** |
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* @throws CommandException |
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*/ |
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public function run() |
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{ |
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$home = $this->migrations->getPath(''); |
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if (file_exists($home)) { |
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throw new CommandException("Could not initialize yentu. Your project has already been initialized with yentu."); |
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} else if (!is_writable(dirname($home))) { |
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throw new CommandException("Your home directory ($home) could not be created."); |
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} |
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$params = $this->getParams(); |
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if (count($params) == 0 && defined('STDOUT')) { |
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throw new CommandException( |
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"You didn't provide any parameters for initialization. Please execute yentu " |
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. "with `init -i` to initialize yentu interractively. " |
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. "You can also try `init --help` for more information." |
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); |
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} |
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$config = $this->createConfigFile($params); |
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$db = $this->manipulatorFactory->createManipulatorWithConfig($config); |
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if ($db->getAssertor()->doesTableExist('yentu_history')) { |
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throw new CommandException("Could not initialize yentu. Your database has already been initialized with yentu."); |
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} |
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$db->createHistory(); |
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$db->disconnect(); |
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$this->io->output("Yentu successfully initialized.\n"); |
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} |
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public function reverseActions() |
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{ |
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unlink($this->migrations->getPath("config/default.conf.php")); |
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rmdir($this->migrations->getPath("config")); |
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rmdir($this->migrations->getPath("migrations")); |
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rmdir($this->migrations->getPath("")); |
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} |
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} |
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Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArray
is initialized the first time when the foreach loop is entered. You can also see that the value of thebar
key is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.