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Optional persistence of step data on flow back transition #248

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Optional persistence of step data on flow back transition #248

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0a0ff6e
Added optional class property and logic for step data persistance if …
Jun 3, 2016
efc8b82
Update FormFlow.php
linxlad Jun 3, 2016
12f3046
Update FormFlow.php
linxlad Jun 3, 2016
27edd58
Update FormFlow.php
linxlad Jun 3, 2016
c210ce7
Update FormFlow.php
linxlad Jun 3, 2016
baf2410
Update FormFlow.php
linxlad Jun 3, 2016
3ef1d60
Update FormFlow.php
linxlad Jun 3, 2016
0e3e148
Update FormFlow.php
linxlad Jun 3, 2016
b819d27
Update FormFlow.php
linxlad Jun 3, 2016
066357d
Update FormFlow.php
linxlad Jun 3, 2016
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54 changes: 54 additions & 0 deletions Form/FormFlow.php
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,11 @@ abstract class FormFlow implements FormFlowInterface {
*/
protected $revalidatePreviousSteps = true;

/**
* @var boolean If this is set to true then step data for the current step will be saved when transitioning backwards.
*/
protected $persistOnBackTransition = false;

/**
* @var boolean
*/
Expand Down Expand Up @@ -347,6 +352,17 @@ public function isRevalidatePreviousSteps() {
return $this->revalidatePreviousSteps;
}

public function setPersistOnBackTransition($persistOnBackTransition) {
$this->persistOnBackTransition = (boolean) $persistOnBackTransition;
}

/**
* {@inheritDoc}
*/
public function isPersistOnBackTransition() {
return $this->persistOnBackTransition;
}

public function setAllowDynamicStepNavigation($allowDynamicStepNavigation) {
$this->allowDynamicStepNavigation = (boolean) $allowDynamicStepNavigation;
}
Expand Down Expand Up @@ -494,6 +510,32 @@ public function nextStep() {

return false; // should never be reached, but just in case
}

/**
* {@inheritDoc}
*/
public function previousStep() {
$currentStepNumber = $this->currentStepNumber - 1;

foreach ($this->getSteps() as $step) {
$step->evaluateSkipping($currentStepNumber, $this);
}

// There is no "before" step as the target step precedes the first step.
if ($currentStepNumber < $this->getFirstStepNumber()) {
return false;
}

$currentStepNumber = $this->applySkipping($currentStepNumber);

if ($currentStepNumber <= $this->getStepCount()) {
$this->currentStepNumber = $currentStepNumber;

return true;
}

return false; // should never be reached, but just in case
}

/**
* {@inheritDoc}
Expand Down Expand Up @@ -667,6 +709,18 @@ protected function bindFlow() {

$this->currentStepNumber = $requestedStepNumber;

if ($this->persistOnBackTransition && $this->getRequestedTransition() === self::TRANSITION_BACK) {

/**
* If persistence on backwards transition is enabled and the current request transition is 'back' then
* persist the current step data to storage.
*/
$this->nextStep();
$form = $this->createFormForStep($this->getCurrentStepNumber());
$this->saveCurrentStepData($form);
$this->previousStep();
}

if (!$this->allowDynamicStepNavigation && $this->getRequestedTransition() === self::TRANSITION_BACK) {
/*
* Don't invalidate data for the current step to properly show the filled out form for that step after
Expand Down