# Add spamshield methods

## Introduction

Powermail adds spamshield methods per default.
If you want to add own spamshield methods or if you want to override a original
method, you can do that with a bit of TypoScript and a PHP-file.

Maybe you want to:

* Validate IP addresses
* Validate duplicate entries
* Add external spam prevention methods
* Something else...

## Small example

Just define which classes should be used. Every method like \*Finisher() will be called - e.g. myFinisher():

```
plugin.tx_powermail.settings.setup {
   spamshield.methods {
       10 {
           class = Vendor\Ext\Domain\Validator\Spamshield\SpamPreventionMethod
       }
   }
}
```


Add a php-file and extend your class with the AbstractMethod from powermail:

```
<?php
namespace Vendor\Ext\Domain\Validator\Spamshield;

use In2code\Powermail\Domain\Validator\SpamShield\AbstractMethod;

/**
* Class DoSomethingDataProcessor
*/
class DoSomethingDataProcessor extends AbstractMethod
{

    /**
     * My spamcheck
     *
     * @return bool true if spam recognized
     */
    public function spamCheck()
    {
       // ...
    }
}
```


## Extended example

See the advanced example with some configuration in TypoScript

```
plugin.tx_powermail.settings.setup {
   spamshield.methods {
       10 {
           # enable or disable this check
           _enable = 1

           # Spamcheck name for log, email and validation message in frontend
           name = IP blacklist check

           # Classname to load with method spamCheck()
           class = Vendor\Ext\Domain\Validator\Spamshield\SpamPreventionMethod

           # if this check failes - add this indication value to indicator
           indication = 7

           # method configuration
           configuration {
               myConfiguration = something
           }
       }
   }
}
```


Add your php-file again and extend your class with the AbstractMethod from powermail:

```
<?php
namespace Vendor\Ext\Domain\Validator\Spamshield;

use In2code\Powermail\Domain\Validator\SpamShield\AbstractMethod;

/**
* Class SpamPreventionMethod
*/
class SpamPreventionMethod extends AbstractMethod
{

    /**
     * @var null|Mail
     */
    protected $mail = null;

    /**
     * @var array
     */
    protected $configuration = [];

    /**
     * @var array
     */
    protected $arguments = [];

    /**
     * @var array
     */
    protected $settings = [];

   /**
    * Will be called always at first
    *
    * @return void
    */
   public function initialize()
   {
   }

   /**
    * Will be called before spamCheck()
    *
    * @return void
    */
   public function initializeSpamCheck()
   {
   }

   /**
    * My spam check
    *
    * @return void true if spam recognized
    */
   public function spamCheck()
   {
       // get value from configuration
       $foo = $this->configuration['myConfiguration'];

       foreach ($this->mail->getAnswers() as $answer) {
           if ($answer->getField()->getMarker() === 'markerName') {
               if ($answer->getValue() === 'foo') {
                   // if spam recognized, return true
                   return false;
               }
           }
       }

       return true;
   }
}
```


## Some notices

* Method spamCheck() will be called always
* The method initialize() and initializeSpamCheck() will always be called at first
* Per default 1 - 7 is already in use from powermail itself (HoneyPodMethod, LinkMethod, NameMethod, etc...).