PHP code example of kael-shipman / factory

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

kael-shipman / factory example snippets

> 
> // FactoryInterface.php
> namespace YourNamespace;
>
> interface FactoryInterface {
>     public function newMyObject();
>     public function newYourObject();
> }
> 

// Get your factory instance
$f = MyFactory::getInstance();

// Use it to create a new app instance
$app = $f->new('app');

// Since you can't guarantee *what* app instance it gave you, you have to verify that it implements the interface you're expecting
if (!($app instanceof AppIWannaRun)) throw new RuntimeException("App returned by factory must be of type `AppIWannaRun`");

// Now run it
$app->run();

class MyApp {
    protected $factory;
    protected $db;

    // Here, you have to pass an instance of your factory to the app on construct, along with an instance of a DB
    public function __construct(FactoryInterface $f, DatabaseInterface $db) {
        $this->factory = $f;
        $this->db = $db;
    }

    // Do lots of stuff here ......

    // Now here's an internal method
    protected function getInternalThings() {
        // Get things from the DB
        $things = $this->db->query('SELECT * FROM `things`');

        // Create a thing collection
        $thingCollection = $this->factory->new('collection', 'things');

        // Iterate over the db results, adding things to the collection
        foreach($things as $thing) {
            $thingCollection[] = $this->factory->create('thing', null, $thing);
        }

        // Return the collection
        return $thingCollection;
    }

    // ...
}

namespace MyNamespace;

class MyFactory extends \KS\Factory {
    // Signature has to match the original Factory::getClass method
    public function getClass(string $type, string $subtype=null) {
        // Return the class as a string including namespace
        if ($type == 'app') {
            // Always a good practice to check for subtype, even if you don't need one today
            if (!$subtype || $subtype == 'generic') return '\\MyNamespace\\App';
        }

        if ($type == 'collection') {
            if ($subtype == 'thing') return '\\MyNamespace\\ThingsCollection';
            // Notice, if we're asking for a subtype we don't know how to create, it falls through
        }

        if ($type == 'thing') {
            if (!$subtype || $subtype == 'generic') return '\\MyNamespace\\Thing';
        }

        // Fall through to parent
        return parent::getClass($type, $subtype);
    }
}