For Developers

Add a Fact

This example will show you how to add a custom fact that looks up some environment variables.

Add your own FactProvider

Your fact provider has to extend the abstract class Leuchtfeuer\Locate\FactProvider\AbstractFactProvider. The value of the PROVIDER_NAME constant has to match the TypoScript key you will use for your fact.

class Environment extends AbstractFactProvider
{
    const PROVIDER_NAME = 'environment';

    public function getBasename(): string
    {
        return self::PROVIDER_NAME;
    }

    public function process(): self
    {
        foreach (GeneralUtility::getIndpEnv('_ARRAY') as $key => $value) {
            $this->facts[$this->getFactPropertyName($key)] = $value;
        }

        return $this;
    }

    public function isGuilty($prosecution): bool
    {
        $subject = array_keys($prosecution);
        $subject = array_shift($subject);
        $value = $prosecution[$subject];
        LocateUtility::mainstreamValue($subject);

        return ($this->getSubject()[$subject] ?? false) == $value;
    }
}

Register fact via TypoScript:

Next, you need to register this PHP class as a fact in TypoScript.
```
config.tx_locate.facts {
    environment = Leuchtfeuer\Locate\FactProvider\Environment
}
```
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Setup a Judge

Now you are all set and use your fact in a judge. Here is an example that will redirect the user to the english page if the HTTP host matches www.Leuchtfeuer.com:

config.tx_locate.judges {
    10 = Leuchtfeuer\Locate\Judge\Condition
    100 {
        verdict = redirectToPageEN
        fact = environment
        prosecution {
            HTTP_HOST = www.Leuchtfeuer.com
        }
    }
}

Add a Verdict

This example will show you how to add a custom verdict that adds some data to the user session.

Add your own verdict class

Your verdict has to extend the abstract class Leuchtfeuer\Locate\Verdict\AbstractVerdict.

class StoreSessionData extends AbstractVerdict
{
    public function execute(): ?ResponseInterface
    {
        $sessionStore = new \Leuchtfeuer\Locate\Store\SessionStore('dummy');
        $sessionStore->set('foo', $this->configuration['foo']);

        return null;
    }
}

Register the verdict in TypoScript

Now you can register this verdict in your TypoScript setup and add a configuration key foo that contains the data that should be stored in the session.
```
config.tx_locate.verdicts {
    storeSessionData = Vendor\Extension\Verdict\StoreSessionData
    storeSessionData {
        foo = bar
    }
}
```
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