Custom finisher for EXT:form in TYPO3 v8

README.md

Custom finisher

This gist is about creating your own custom finisher available for forms you create with EXT:form in TYPO3 v8.

Standard finishers let you send an email, redirect to a page, etc. This is about creating your own business logic when sending the form.

MyCustomActionBackend.yaml

# File EXT:your_ext/Configuration/Yaml/MyCustomActionBackend.yaml
TYPO3:
  CMS:
    Form:
      prototypes:
          # add our finisher to the 'standard' form prototype
          standard:
            formElementsDefinition:
              Form:
                formEditor:
                  editors:
                    # 900 = 'finishers' in EXT:form/Configuration/Yaml/FormEditorSetup.yaml
                    900:
                      selectOptions:
                        # add the MyCustomAction finisher to the finishers select list
                        # "500" is to prevent overriding standard finishers which are < 100
                        500:
                          value: 'MyCustomAction'
                          label: 'My Custom Action'

                  propertyCollections:
                    finishers:
                      # add the MyCustomAction finisher editor configurations
                      # at the moment there are no editors but this is needed anyway to "see" the
                      # finisher added to the form and being able to remove it with the delete icon
                      # "500" below has nothing to do with the "500" above but I find it more logical
                      # to use same index :)
                      500:
                        __inheritances:
                          10: 'TYPO3.CMS.Form.mixins.FormEngineCustomActionMixin'
                        identifier: 'MyCustomAction'
                        editors:
                          __inheritances:
                            10: 'TYPO3.CMS.Form.mixins.formElementMixins.BaseCollectionEditorsMixin'
                          100:
                            label: 'My Custom Action'
                          200:
                            identifier: 'yourCustomOption'
                            templateName: 'Inspector-TextEditor'
                            label: 'Your custom option'
                            propertyPath: 'options.yourCustomOption'
                            enableFormelementSelectionButton: true
                            propertyValidators:
                              10: 'NotEmpty'
                              20: 'FormElementIdentifierWithinCurlyBracesInclusive'

            finishersDefinition:
              MyCustomAction:
                formEditor:
                  iconIdentifier: 't3-form-icon-finisher'
                  predefinedDefaults:
                    options:
                      yourCustomOption: ''

      mixins:
        FormEngineCustomActionMixin:
          elements:
            yourCustomOption:
              config:
                type: 'input'

MyCustomActionFinisher.php

<?php
declare(strict_types=1);
// File EXT:your_ext/Classes/Domain/Finishers/MyCustomActionFinisher.php

namespace VENDOR\YourExt\Domain\Finishers;

use TYPO3\CMS\Form\Domain\Finishers\Exception\FinisherException;

class MyCustomActionFinisher extends \TYPO3\CMS\Form\Domain\Finishers\EmailFinisher
{

    /**
     * Executes this finisher
     * @see AbstractFinisher::execute()
     *
     * @throws FinisherException
     */
    protected function executeInternal()
    {
        // TODO
        parent::executeInternal();
    }

}

MyCustomActionFrontend.yaml

# File EXT:your_ext/Configuration/Yaml/MyCustomActionFrontend.yaml
TYPO3:
  CMS:
    Form:
      prototypes:
          # add our finisher to the 'standard' form prototype
          standard:
            finishersDefinition:
              MyCustomAction:
                implementationClassName: 'VENDOR\YourExt\Domain\Finishers\MyCustomActionFinisher'
                options:
                  #yourCustomOption: ''

setup.t3s

# File EXT:your_ext/Configuration/TypoScript/setup.t3s
# or any other TypoScript file you use in your page tree

# Registration for the backend
module.tx_form {
    settings {
        yamlConfigurations {
            100 = EXT:your_ext/Configuration/Yaml/MyCustomActionBackend.yaml
        }
    }
}

# Registration for the frontend
plugin.tx_form {
    settings {
        yamlConfigurations {
            100 = EXT:your_ext/Configuration/Yaml/MyCustomActionFrontend.yaml
        }
    }
}

I have TYPO3 9.x setup, I followed the same steps for my custom finisher. But, while I debug the form values in the finisher It does not show.

$formData = $this->finisherContext->getFormValues();

Can you please help.