README

Description

Injectable-bundle is responsible for injecting array of objects into your class. By tagging you mark an service to be injected into your target service.

Example use JMSDiExtraBundle, but you can easily configure it with services.yml

Target Service

/**
* @DI\Service("template_factory")
*/
class TemplateFactory
{
    /**
    * @param array|Template[] $providers
    */
    private $providers;

    /**
     * @DI\InjectParams({
     *      "providers" = @DI\Inject("%empty_array%")
     * })
     */
    public function __construct(array $providers)
    {
        $this->providers = $providers;
    }
    
    public function createFor(string $type) : Template
    {
        foreach ($this->providers as $provider) {
            if ($provider->isHandling($type)) {
                return $provider;
            }
        }
        
        throw new \Exception("Template for {$type} doesn't exists!");
    }
}

interface Template
{
    public function render() : string
    
    public function isHandling(string $type) : bool;
}

Injected Services

/**
 * @DI\Service()
 * @DI\Tag(name="injectable", attributes={"to"="template_factory", "index"="0"})
 */
class NiceTemplate implements Template
{
    public function render()
   {
        return "nice template";
   }
   
   public function isHandling(string $type) : bool
   {
        return $type === 'nice';
   }
}

/**
 * @DI\Service()
 * @DI\Tag(name="injectable", attributes={"to"="template_factory", "index"="0"})
 */
class UglyTemplate implements Template
{
    public function render()
   {
        return "ugly template";
   }
   
  public function isHandling(string $type) : bool
  {
       return $type === 'ugly';
  }
}

Above service will be injected into TemplateFactory.
If there will be no services tagged as injectable for template_factory, template factory will use of empty array.

Understanding the annotations

@DI\Tag(name="injectable", attributes={"to"="template_factory", "index"="0"})

• name="injectable" - Marks service to be used by InjectableBundle
• "to"="template_factory" - Sets target service
• "index"="0" - Sets target service constructor argument index