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ENHANCEMENT Added MultiForm->getSavedSteps() and MultiForm->getSavedStepByClass()

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ENHANCEMENT Added MultiFormStep->validateStep() for custom validation routines
ENHANCEMENT Changed MultiForm->save() to use $form->getData() instead of $data to ensure that all fields are saveable into a DataObject (had trouble with ConfirmedPasswordField returning array instead of string)
This commit is contained in:
Ingo Schommer 2008-10-01 18:36:52 +00:00
parent 228d03592e
commit 7968b09fea
2 changed files with 149 additions and 87 deletions
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173
code/MultiForm.php
View File

@ -54,7 +54,7 @@ abstract class MultiForm extends Form {
'executeForm',
'MultiFormSessionID',
'SecurityID'
);
);
/**
* Start the MultiForm instance.
@ -83,9 +83,8 @@ abstract class MultiForm extends Form {
// Set up the actions for the current step
$actions = $this->actionsFor($currentStep);
// Set up validation (if necessary) {@TODO find a better way instead
// of hardcoding a check for action_prev in order to prevent validation
// when hitting the back button
// Set up validation (if necessary)
// @todo find a better way instead of hardcoding a check for action_prev in order to prevent validation when hitting the back button
$validator = null;
if(empty($_REQUEST['action_prev'])) {
if($this->getCurrentStep()->getValidator()) {
@ -183,8 +182,8 @@ abstract class MultiForm extends Form {
*/
protected function setSession() {
// If there's a MultiFormSessionID variable set, find that, otherwise create a new session
if(isset($_GET['MultiFormSessionID'])) {
$this->session = $this->getSessionRecord($_GET['MultiFormSessionID']);
if(isset($_GET['MultiFormSessionID'])) {
$this->session = $this->getSessionRecord($_GET['MultiFormSessionID']);
}
// If there was no session found, create a new one instead
@ -192,24 +191,59 @@ abstract class MultiForm extends Form {
$this->session = new MultiFormSession();
$this->session->write();
}
// Create encrypted identification to the session instance if it doesn't exist
if(!$this->session->Hash) {
$this->session->Hash = sha1($this->session->ID . '-' . microtime());
$this->session->write();
}
}
/**
* Return an instance of MultiFormSession.
*
* @param string $hash The unique, encrypted hash to identify the session
* @return MultiFormSession
*/
function getSessionRecord($hash) {
$SQL_hash = Convert::raw2sql($hash);
return DataObject::get_one('MultiFormSession', "Hash = '$SQL_hash' AND IsComplete = 0");
}
}
/**
* Return an instance of MultiFormSession.
*
* @param string $hash The unique, encrypted hash to identify the session
* @return MultiFormSession
*/
function getSessionRecord($hash) {
$SQL_hash = Convert::raw2sql($hash);
return DataObject::get_one('MultiFormSession', "Hash = '$SQL_hash' AND IsComplete = 0");
}
/**
* Get all steps saved in the database for the currently active session,
* in the order they were saved, oldest to newest (automatically ordered by ID).
* If you want a full chain of steps regardless if they've already been saved
* to the database, use {@link getAllStepsLinear()}.
*
* @return DataObjectSet|boolean A set of MultiFormStep subclasses
*/
function getSavedSteps() {
return DataObject::get(
'MultiFormStep',
sprintf("SessionID = '%s'",
$this->session->ID
)
);
}
/**
* Get a step which was previously saved to the database in the current session.
* Caution: This might cause unexpected behaviour if you have multiple steps
* in your chain with the same classname.
*
* @param string $className Classname of a {@link MultiFormStep} subclass
* @return MultiFormStep
*/
function getSavedStepByClass($className) {
return DataObject::get_one(
'MultiFormStep',
sprintf("SessionID = '%s' AND ClassName = '%s'",
$this->session->ID,
Convert::raw2sql($className)
)
);
}
/**
* Build a FieldSet of the FormAction fields for the given step.
@ -241,7 +275,7 @@ abstract class MultiForm extends Form {
} else {
$actions->push(new FormAction('next', _t('MultiForm.NEXT', 'Next')));
}
// If there is a previous step defined, add the back button
if($step->getPreviousStep() && $step->canGoBack()) {
// If there is a next step, insert the action before the next action
@ -284,16 +318,16 @@ abstract class MultiForm extends Form {
* so you can create your own functionality which handles saving
* of all the data collected through each step of the form.
*
* @param array $data The request data returned from the form
* @param array $data The request data returned from the form
* @param object $form The form that the action was called on
*/
public function finish($data, $form) {
if(!$this->getCurrentStep()->isFinalStep()) {
Director::redirectBack();
return false;
}
// Save the form data for the current step
public function finish($data, $form) {
if(!$this->getCurrentStep()->isFinalStep()) {
Director::redirectBack();
return false;
}
// Save the form data for the current step
$this->save($data);
}
@ -303,24 +337,30 @@ abstract class MultiForm extends Form {
* Saves the current step session data to the database, creates the
* new step based on getNextStep() of the current step (or fetches
* an existing one), resets the current step to the next step,
* then redirects to the newly set step.
*
* @param array $data The request data returned from the form
* then redirects to the newly set step.
*
* @param array $data The request data returned from the form
* @param object $form The form that the action was called on
*/
public function next($data, $form) {
if(!$this->getCurrentStep()->getNextStep()) {
// Get the next step class
$nextStepClass = $this->getCurrentStep()->getNextStep();
if(!$nextStepClass) {
Director::redirectBack();
return false;
}
// custom validation (use MultiFormStep->getValidator() for built-in functionality)
if(!$this->getCurrentStep()->validateStep($data, $form)) {
Director::redirectBack();
return false;
}
// Get the next step class
$nextStepClass = $this->getCurrentStep()->getNextStep();
// Save the form data for the current step
$this->save($data);
$this->save($form->getData());
// Determine whether we can use a step already in the DB, or have to create a new one
// Determine whether we can use a step already in the DB, or have to create a new one
if(!$nextStep = DataObject::get_one($nextStepClass, "SessionID = {$this->session->ID}")) {
$nextStep = new $nextStepClass();
$nextStep->SessionID = $this->session->ID;
@ -340,9 +380,9 @@ abstract class MultiForm extends Form {
*
* Retrieves the previous step class, finds the record for that
* class in the DB, and sets the current step to that step found.
* Finally, it redirects to that step.
*
* @param array $data The request data returned from the form
* Finally, it redirects to that step.
*
* @param array $data The request data returned from the form
* @param object $form The form that the action was called on
*/
public function prev($data, $form) {
@ -381,7 +421,7 @@ abstract class MultiForm extends Form {
$currentStep = $this->getCurrentStep();
if(is_array($data)) {
foreach($data as $field => $value) {
if(in_array($field, $this->stat('ignored_fields')) || self::is_action_field($field)) {
if(in_array($field, $this->stat('ignored_fields'))) {
unset($data[$field]);
}
}
@ -395,8 +435,8 @@ abstract class MultiForm extends Form {
/**
* Add the MultiFormSessionID variable to the URL on form submission.
* This is a means to persist the session, by adding it's identification
* to the URL, which ties it back to this MultiForm instance.
*
* to the URL, which ties it back to this MultiForm instance.
*
* @return string
*/
function FormAction() {
@ -407,13 +447,13 @@ abstract class MultiForm extends Form {
return $action;
}
/**
/**
* Determine the steps to show in a linear fashion, starting from the
* first step. We run a recursive function passing the steps found
* by reference to get a listing of the steps.
* first step. We run {@link getAllStepsRecursive} passing the steps found
* by reference to get a listing of the steps.
*
* @return DataObjectSet
*/
* @return DataObjectSet
*/
public function getAllStepsLinear() {
$stepsFound = new DataObjectSet();
@ -436,6 +476,9 @@ abstract class MultiForm extends Form {
* Recursively run through steps using the getNextStep() method on each step
* to determine what the next step is, gathering each step along the way.
* We stop on the last step, and return the results.
* If a step in the chain was already saved to the database in the current
* session, its used - otherwise a singleton of this step is used.
* Caution: Doesn't consider branching for steps which aren't in the database yet.
*
* @param $step Subclass of MultiFormStep to find the next step of
* @param $stepsFound $stepsFound DataObjectSet reference, the steps found to call back on
@ -470,7 +513,7 @@ abstract class MultiForm extends Form {
} else {
return $stepsFound;
}
}
}
/**
* Number of steps already completed (excluding currently started step).
@ -506,26 +549,26 @@ abstract class MultiForm extends Form {
*/
public function getCompletedPercent() {
return (float)$this->CompletedStepCount * 100 / $this->TotalStepCount;
}
}
/**
* Determines whether the field is an action. This checks the string name of the
* field, and not the actual field object of one. The actual checking is done
* by doing a string check to see if "action_" is prefixed to the name of the
* field. For example, in the form system: FormAction('next', 'Next') field
/**
* Determines whether the field is an action. This checks the string name of the
* field, and not the actual field object of one. The actual checking is done
* by doing a string check to see if "action_" is prefixed to the name of the
* field. For example, in the form system: FormAction('next', 'Next') field
* gives an ID of "action_next"
*
* The assumption here is the ID we're checking against has the prefix that we're
* looking for, otherwise this won't work.
*
* @param string $fieldName The name of the field to check is an action
* @param string $prefix The prefix of the string to check for, default is "action_"
* @return boolean
*/
public static function is_action_field($fieldName, $prefix = 'action_') {
if(substr((string)$fieldName, 0, strlen($prefix)) == $prefix) return true;
}
* looking for, otherwise this won't work.
*
* @param string $fieldName The name of the field to check is an action
* @param string $prefix The prefix of the string to check for, default is "action_"
* @return boolean
*/
public static function is_action_field($fieldName, $prefix = 'action_') {
if(substr((string)$fieldName, 0, strlen($prefix)) == $prefix) return true;
}
}
}
?>

63
code/MultiFormStep.php
View File

@ -1,7 +1,7 @@
<?php
<?php
/**
* MultiFormStep controls the behaviour of a single form step in the MultiForm
* MultiFormStep controls the behaviour of a single form step in the MultiForm
* process. All form steps are required to be subclasses of this class, as it
* encapsulates the functionality required for the step to be aware of itself
* in the process by knowing what it's next step is, and if applicable, it's previous
@ -100,21 +100,22 @@ class MultiFormStep extends DataObject {
/**
* Get a validator specific to this form.
* The form is automatically validated in {@link Form->httpSubmission()}.
*
* @return Validator
*/
public function getValidator() {
return false;
}
/**
/**
* Accessor method for $this->title
*
* @return string Title of this step
*/
public function getTitle() {
return $this->title;
}
* @return string Title of this step
*/
public function getTitle() {
return $this->title;
}
/**
* Gets a direct link to this step (only works
@ -157,6 +158,24 @@ class MultiFormStep extends DataObject {
$this->write();
}
/**
* Custom validation for a step. In most cases, it should be sufficient
* to have built-in validation through the {@link Validator} class
* on the {@link getValidator()} method.
* Use {@link Form->sessionMessage()} to feed back validation messages
* to the user. Please don't redirect from this method,
* this is taken care of in {@link next()}.
*
* @usedby next()
*
* @param array $data Request data
* @param Form $form
* @return boolean Validation success
*/
public function validateStep($data, $form) {
return true;
}
/**
* Returns the first value of $next_step
*
@ -274,19 +293,19 @@ class MultiFormStep extends DataObject {
public function isFinalStep() {
return $this->stat('is_final_step');
}
/**
* Determines whether the currently viewed step is the current step set in the session.
* This assumes you are checking isCurrentStep() against a data record of a MultiFormStep
* subclass, otherwise it doesn't work. An example of this is using a singleton instance - it won't
* work because there's no data.
*
* @return boolean
*/
public function isCurrentStep() {
return ($this->class == $this->Session()->CurrentStep()->class) ? true : false;
}
}
/**
* Determines whether the currently viewed step is the current step set in the session.
* This assumes you are checking isCurrentStep() against a data record of a MultiFormStep
* subclass, otherwise it doesn't work. An example of this is using a singleton instance - it won't
* work because there's no data.
*
* @return boolean
*/
public function isCurrentStep() {
return ($this->class == $this->Session()->CurrentStep()->class) ? true : false;
}
}
?>