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The fluidbackend package from FluidTYPO3

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1.1.0 2015-11-25 10:37 UTC

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Last update: 2020-01-24 15:46:21 UTC



Fluidbackend: Flux Backend Modules

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Fluidbackend uses Flux forms as backend modules which can save data to a multitude of targets and target types.

These three pieces of code together make a new backend module through Fluidbackend:

// ext_tables.php
\FluidTYPO3\Flux\Core::registerProviderExtensionKey('MyVendor.Myextension', 'Backend');
// Classes/Controller/BackendController
namespace MyVendor\Myextension\Controller;
use FluidTYPO3\Fluidbackend\Controller\AbstractBackendController;
class BackendController extends AbstractBackendController {

<!-- Resources/Private/Templates/Backend/Example.html -->
{namespace flux=FluidTYPO3\Flux\ViewHelpers}
<f:layout name="Backend" />
<f:section name="Configuration">
    <flux:form id="mymodule">
        <!-- The options that govern integration -->
        <flux:form.option name="Fluidbackend" value="{
            moduleGroup: 'mygroupnameorexistinggroup',
            modulePosition: 'after:web',
            modulePageTree: 1}" />
        <!-- The fields that the form will contain -->
        <flux:field.input name="inputfield" />
        <!-- The pipe(s) which will process the data -->
        <flux:pipe.flashMessage title="Win!" message="You win!" />
<f:section name="Main">
	<!-- If you want some content before the form... -->
    <flux:form.render form="{form}" />
    <!-- ...or after it, here's the place to put it -->


Fluidbackend takes a Flux-enriched Fluid template similar to those used by other Flux features like Fluidcontent and Fluidpages, and turns the Flux Form definition inside that template into a full-fledged backend module. And like Fluidcontent and Fluidpages, Fluidbackend also requires that you ship your templates inside a so-called Provider Extension.

Fluidbackend requires a controller class - your module still has to be registered in TYPO3 as a proper backend module, but rather than requiring you to enter all the configuration those modules need (a lot of boilerplate code), Fluidbackend uses Flux to read the instructions for how to register the template as a backend module. You define these options inside the template and just like with Fluidcontent and Fluidpages, an integrator can later replace these templates, add additional fields, data processing etc.

Fluidbackend was created to fit the 80% of use cases intentionally, to keep the complexity low. As such, it is not a replacement for advanced backend modules - it is merely a way to very quickly create a module based on a form which saves/processes data.

How does it work

The developer flow of Fluidbackend is as follows:

  1. Developer registers Provider Extension with Flux, with controller name Backend.
  2. Developer creates form in template with module options and Pipes that process data.
  3. Fluidbackend hooks into TYPO3 backend rendering, processing Backend Provider Extensions.
  4. The Flux Form instance from each template is retrieved.
  5. The options defined in this Form are used to give the module icon, placement, group etc.
  6. The module is added to the list of available TYPO3 backend modules.
  7. Steps 3-5 is repeated with every template file that contain a valid and enabled Form definition.

And the user flow is as follows:

  1. The user enters the backend module.
  2. The template that corresponds to that module is rendered.
  3. The user fills in the form that was defined in the template.
  4. The user submits the form data.
  5. The BackendController action saveAction is called.
  6. Fluidbackend reads the Form instance.
  7. All in- and output processings defined in the Flux form as Pipes are executed.
  8. The user is returned to the form.

In addition to passing the data through all Pipes, Fluidbackend will also store a database record (currently in PID zero). The data stored in this record can then be retrieved. The data record uses the Extbase domain model principes and can be attached to other domain records from other extensions, should you wish to bind a stored set of data to one or more of your model instances.

There are two ways to reach the stored data record manually:

<!-- in Fluid -->

{flux:form.data(table: 'tx_fluidbackend_domain_model_configuration',
	field: 'configuration', uid: uidOfSavedRecord) -> v:var.set(name: 'myData')}
// In PHP

// $this->configurationRepository is an injected \FluidTYPO3\Fluidbackend\Domain\Repository\ConfigurationRepository
$uid = 123; // Uid of stored data record.
/** @var $settingsRecord \FluidTYPO3\Fluidbackend\Domain\Model\Configuration */
$settingsRecord = $this->configurationRepository->findByUid($uid);
$configuration = (array) $settingsRecord->getConfiguration();

What are "Pipes"?

The Pipes are a concept from Flux which essentially define some handling that accepts input and delivers output. A Pipe may change the data it receives or it may trigger some action without modifying the data. Inside, a Pipe is a simple class that has a method which accepts the data as input and is expected to return the data, modified or not. Flux then provides ViewHelpers which let developers associate Pipes with the Flux form. Each Pipe can be configured to act either before the controller action is called or after it has been called, by use of a direction parameter.

When the Pipes are executed, the input data travels through each Pipe in the order they were defined. If a Pipe converts the data, then the converted data is passed from that point onward and all the next Pipes receive the converted data only.

Because the Pipes are defined in the template they can be controlled with f:if conditions and each parameter of each Pipe can be controlled individually. New Pipes can be added and existing ones removed/disabled.

Fluidbackend then uses this when the form data is submitted. The Form instance is retrieved and from it all Pipe instances are fetched and processed. At any point can the Pipes be changed - for example, it can be done in the controller after data is sent. Pipes can be accessed using $form->getOutlet()->getPipesIn() or $form->getOutlet()->getPipesOut(), into which Pipes are grouped by their direction parameter.

Flux includes a few Pipes:

  • TypeConverterPipe - converts the input to another output type.
  • FlashMessagePipe - dispatches a FlashMessage with selected title/message/severity.
  • EmailPipe - sends an email with selected subject/sender/recipient.
  • ControllerPipe - calls a custom controller action with the posted data as input.

You, as a developer, can create and implement your own Pipe implementations. To do so:

  1. To implement the PipeInterface from Flux.
  2. To create a ViewHelper class that subclasses AbstractFormViewHelper from Flux.
  3. To make that ViewHelper do $this->getForm()->getOutlet()->addPipeIn($pipe) (or addPipeOut($pipe)).
  4. Alternatively, in your BackendController, $this->provider->getForm($this->getRecord())->getOutlet()->addPipeIn($pipe).

If you want your Pipe to be controlled through the template, add a ViewHelper for it. Otherwise, all you need is the class.