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<?php |
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namespace SilverStripe\UserForms\Form; |
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use SilverStripe\Dev\Debug; |
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use SilverStripe\Forms\RequiredFields; |
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use SilverStripe\ORM\ArrayLib; |
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use SilverStripe\UserForms\Model\EditableFormField; |
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/** |
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* An extension of RequiredFields which handles conditionally required fields. |
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* |
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* A conditionally required is a field that is required, but can be hidden by display rules. |
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* When it is visible, (according to the submitted form data) it will be validated as required. |
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* When it is hidden, it will skip required validation. |
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* |
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* Required fields will nb validated as usual. |
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* Conditionally required fields will be validated if the display rules are satisfied in the submitted dataset. |
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*/ |
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class UserFormsRequiredFields extends RequiredFields |
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{ |
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/** |
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* Allows validation of fields via specification of a php function for |
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* validation which is executed after the form is submitted. |
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* |
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* @param array $data |
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* |
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* @return boolean |
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*/ |
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public function php($data) |
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{ |
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$valid = true; |
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$fields = $this->form->Fields(); |
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foreach ($fields as $field) { |
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$valid = ($field->validate($this) && $valid); |
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} |
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if (!$this->required) { |
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return $valid; |
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} |
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foreach ($this->required as $fieldName) { |
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if (!$fieldName) { |
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continue; |
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} |
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// get form field |
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if ($fieldName instanceof FormField) { |
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$formField = $fieldName; |
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$fieldName = $fieldName->getName(); |
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} else { |
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$formField = $fields->dataFieldByName($fieldName); |
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} |
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// get editable form field - owns display rules for field |
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$editableFormField = $this->getEditableFormFieldByName($fieldName); |
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$error = false; |
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// validate if there are no display rules or the field is conditionally visible |
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if (!$this->hasDisplayRules($editableFormField) || |
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$this->conditionalFieldEnabled($editableFormField, $data)) { |
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$error = $this->validateRequired($formField, $data); |
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} |
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// handle error case |
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if ($formField && $error) { |
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$this->handleError($formField, $fieldName); |
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$valid = false; |
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} |
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} |
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return $valid; |
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} |
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private function getEditableFormFieldByName($name) |
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{ |
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return EditableFormField::get()->filter(['name' => $name])->first(); |
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} |
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private function getEditableFormFieldByID($id) |
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{ |
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return EditableFormField::get_by_id($id); |
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} |
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private function hasDisplayRules($field) |
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{ |
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return ($field->DisplayRules()->count() > 0); |
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} |
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private function conditionalFieldEnabled($editableFormField, $data) |
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{ |
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$displayRules = $editableFormField->DisplayRules(); |
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$conjunction = $editableFormField->DisplayRulesConjunctionNice(); |
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$displayed = ($editableFormField->ShowOnLoadNice() === 'show'); |
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// && start with true and find and condition that doesn't satisfy |
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// || start with false and find and condition that satisfies |
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$conditionsSatisfied = ($conjunction === '&&'); |
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foreach ($displayRules as $rule) { |
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$controllingField = EditableFormField::get()->byID($rule->ConditionFieldID); |
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$valid = false; |
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if ($controllingField->DisplayRules()->count() > 0) { // controllingField is also a conditional field |
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// recursively check - if any of the dependant fields are hidden, then this field cannot be visible. |
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if ($this->conditionalFieldEnabled($controllingField, $data)) { |
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return false; |
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}; |
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} |
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$ruleSatisfied = $rule->validateAgainstFormData($data); |
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if ($conjunction === '||' && $ruleSatisfied) { |
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$conditionsSatisfied = true; |
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break; |
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} |
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if ($conjunction === '&&' && !$ruleSatisfied) { |
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$conditionsSatisfied = false; |
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break; |
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} |
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} |
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// initially displayed - condition fails || initially hidden, condition passes |
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return ($displayed xor $conditionsSatisfied); |
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} |
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private function validateRequired($field, $data) |
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{ |
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$error = false; |
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$fieldName = $field->getName(); |
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// submitted data for file upload fields come back as an array |
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$value = isset($data[$fieldName]) ? $data[$fieldName] : null; |
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if (is_array($value)) { |
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if ($formField instanceof FileField && isset($value['error']) && $value['error']) { |
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$error = true; |
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} else { |
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$error = (count($value)) ? false : true; |
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} |
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} else { |
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// assume a string or integer |
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$error = (strlen($value)) ? false : true; |
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} |
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return $error; |
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} |
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private function handleError($formField, $fieldName) |
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{ |
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$errorMessage = _t( |
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'SilverStripe\\Forms\\Form.FIELDISREQUIRED', |
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'{name} is required', |
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array( |
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'name' => strip_tags( |
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'"' . ($formField->Title() ? $formField->Title() : $fieldName) . '"' |
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) |
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) |
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); |
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if ($msg = $formField->getCustomValidationMessage()) { |
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$errorMessage = $msg; |
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} |
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$this->validationError( |
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$fieldName, |
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$errorMessage, |
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"required" |
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); |
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} |
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} |
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silverstripe /
silverstripe-userforms
Loading history...
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.