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<?php |
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namespace SilverStripe\UserForms\Model; |
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use InvalidArgumentException; |
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use LogicException; |
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use SilverStripe\CMS\Controllers\CMSMain; |
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use SilverStripe\Control\Controller; |
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use SilverStripe\Core\Convert; |
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use SilverStripe\ORM\DataObject; |
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use SilverStripe\Security\Member; |
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use SilverStripe\Versioned\Versioned; |
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/** |
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* A custom rule for showing / hiding an EditableFormField |
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* based the value of another EditableFormField. |
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* |
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* @method EditableFormField Parent() |
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* @method EditableFormField ConditionField() |
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* |
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* @property string Display |
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* @property string ConditionOption |
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* @property string FieldValue |
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*/ |
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class EditableCustomRule extends DataObject |
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{ |
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private static $condition_options = [ |
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'IsBlank' => 'Is blank', |
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'IsNotBlank' => 'Is not blank', |
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'HasValue' => 'Equals', |
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'ValueNot' => 'Doesn\'t equal', |
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'ValueLessThan' => 'Less than', |
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'ValueLessThanEqual' => 'Less than or equal', |
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'ValueGreaterThan' => 'Greater than', |
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'ValueGreaterThanEqual' => 'Greater than or equal' |
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]; |
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private static $db = [ |
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'Display' => 'Enum("Show,Hide")', |
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'ConditionOption' => 'Enum("IsBlank,IsNotBlank,HasValue,ValueNot,ValueLessThan,ValueLessThanEqual,ValueGreaterThan,ValueGreaterThanEqual")', |
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'FieldValue' => 'Varchar(255)' |
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]; |
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private static $has_one = [ |
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'Parent' => EditableFormField::class, |
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'ConditionField' => EditableFormField::class |
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]; |
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/** |
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* Built in extensions required |
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* |
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* @config |
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* @var array |
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*/ |
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private static $extensions = [ |
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Versioned::class . "('Stage', 'Live')" |
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]; |
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private static $table_name = 'EditableCustomRule'; |
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/** |
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* @param Member $member |
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* @return bool |
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*/ |
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public function canDelete($member = null) |
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{ |
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return $this->canEdit($member); |
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} |
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/** |
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* @param Member $member |
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* @return bool |
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*/ |
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public function canEdit($member = null) |
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{ |
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return $this->Parent()->canEdit($member); |
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} |
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/** |
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* @param Member $member |
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* @return bool |
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*/ |
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public function canView($member = null) |
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{ |
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return $this->Parent()->canView($member); |
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} |
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/** |
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* Return whether a user can create an object of this type |
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* |
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* @param Member $member |
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* @param array $context Virtual parameter to allow context to be passed in to check |
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* @return bool |
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*/ |
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public function canCreate($member = null, $context = []) |
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{ |
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// Check parent page |
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$parent = $this->getCanCreateContext(func_get_args()); |
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if ($parent) { |
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return $parent->canEdit($member); |
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} |
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// Fall back to secure admin permissions |
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return parent::canCreate($member); |
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} |
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/** |
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* Helper method to check the parent for this object |
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* |
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* @param array $args List of arguments passed to canCreate |
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* @return DataObject Some parent dataobject to inherit permissions from |
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*/ |
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protected function getCanCreateContext($args) |
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{ |
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// Inspect second parameter to canCreate for a 'Parent' context |
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if (isset($args[1]['Parent'])) { |
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return $args[1]['Parent']; |
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} |
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// Hack in currently edited page if context is missing |
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if (Controller::has_curr() && Controller::curr() instanceof CMSMain) { |
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return Controller::curr()->currentPage(); |
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} |
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// No page being edited |
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return null; |
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} |
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/** |
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* @param Member $member |
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* @return bool |
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*/ |
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public function canPublish($member = null) |
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{ |
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return $this->canEdit($member); |
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} |
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/** |
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* @param Member $member |
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* @return bool |
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*/ |
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public function canUnpublish($member = null) |
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{ |
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return $this->canDelete($member); |
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} |
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/** |
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* Substitutes configured rule logic with it's JS equivalents and returns them as array elements |
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* |
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* @return array |
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* @throws LogicException If the provided condition option was not able to be handled |
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*/ |
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public function buildExpression() |
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{ |
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/** @var EditableFormField $formFieldWatch */ |
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$formFieldWatch = $this->ConditionField(); |
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//Encapsulated the action to the object |
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$action = $formFieldWatch->getJsEventHandler(); |
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// is this field a special option field |
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$checkboxField = $formFieldWatch->isCheckBoxField(); |
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$radioField = $formFieldWatch->isRadioField(); |
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$target = sprintf('$("%s")', $formFieldWatch->getSelectorFieldOnly()); |
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$fieldValue = Convert::raw2js($this->FieldValue); |
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$conditionOptions = [ |
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'ValueLessThan' => '<', |
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'ValueLessThanEqual' => '<=', |
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'ValueGreaterThan' => '>', |
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'ValueGreaterThanEqual' => '>=' |
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]; |
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// and what should we evaluate |
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switch ($this->ConditionOption) { |
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case 'IsNotBlank': |
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case 'IsBlank': |
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$expression = ($checkboxField || $radioField) ? "!{$target}.is(\":checked\")" : "{$target}.val() == ''"; |
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if ((string) $this->ConditionOption === 'IsNotBlank') { |
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//Negate |
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$expression = "!({$expression})"; |
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} |
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break; |
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case 'HasValue': |
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case 'ValueNot': |
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if ($checkboxField) { |
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if ($formFieldWatch->isCheckBoxGroupField()) { |
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$expression = sprintf( |
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"$.inArray('%s', %s.filter(':checked').map(function(){ return $(this).val();}).get()) > -1", |
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$fieldValue, |
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$target |
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); |
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} else { |
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$expression = "{$target}.prop('checked')"; |
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} |
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} elseif ($radioField) { |
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// We cannot simply get the value of the radio group, we need to find the checked option first. |
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$expression = sprintf( |
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'%s.closest(".field, .control-group").find("input:checked").val() == "%s"', |
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$target, |
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$fieldValue |
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); |
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} else { |
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$expression = sprintf('%s.val() == "%s"', $target, $fieldValue); |
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} |
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if ((string) $this->ConditionOption === 'ValueNot') { |
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//Negate |
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$expression = "!({$expression})"; |
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} |
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break; |
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case 'ValueLessThan': |
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case 'ValueLessThanEqual': |
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case 'ValueGreaterThan': |
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case 'ValueGreaterThanEqual': |
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$expression = sprintf( |
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'%s.val() %s parseFloat("%s")', |
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$target, |
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$conditionOptions[$this->ConditionOption], |
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$fieldValue |
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); |
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break; |
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default: |
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throw new LogicException("Unhandled rule {$this->ConditionOption}"); |
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break; |
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} |
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1 |
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$result = [ |
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'operation' => $expression, |
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'event' => $action, |
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]; |
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2 |
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return $result; |
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} |
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2 |
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2 |
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/** |
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* Determines whether the rule is satisfied, based on provided form data. |
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* Used for php validation of required conditional fields |
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* |
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* @param array $data Submitted form data |
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* @return boolean |
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* @throws LogicException Invalid ConditionOption is set for this rule. |
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*/ |
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public function validateAgainstFormData(array $data) |
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{ |
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$controllingField = $this->ConditionField(); |
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2 |
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if (!isset($data[$controllingField->Name])) { |
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return false; |
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} |
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$valid = false; |
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$targetFieldValue = $this->FieldValue; |
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$actualFieldValue = $data[$controllingField->Name]; |
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switch ($this->ConditionOption) { |
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case 'IsNotBlank': |
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$valid = ($actualFieldValue !== ''); |
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break; |
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case 'IsBlank': |
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$valid = ($actualFieldValue === ''); |
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break; |
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case 'HasValue': |
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$valid = ($actualFieldValue === $targetFieldValue); |
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break; |
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case 'ValueNot': |
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$valid = ($actualFieldValue !== $targetFieldValue); |
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break; |
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case 'ValueLessThan': |
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$valid = ($actualFieldValue < $targetFieldValue); |
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break; |
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case 'ValueLessThanEqual': |
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$valid = ($actualFieldValue <= $targetFieldValue); |
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break; |
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case 'ValueGreaterThan': |
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$valid = ($actualFieldValue > $targetFieldValue); |
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break; |
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case 'ValueGreaterThanEqual': |
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$valid = ($actualFieldValue >= $targetFieldValue); |
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break; |
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default: |
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throw new LogicException("Unhandled rule {$this->ConditionOption}"); |
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break; |
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} |
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return $valid; |
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} |
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/** |
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* Returns the opposite visibility function for the value of the initial visibility field, e.g. show/hide. This |
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* will toggle the "hide" class either way, which is handled by CSS. |
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* |
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* @param string $initialState |
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* @param boolean $invert |
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* @return string |
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*/ |
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public function toggleDisplayText($initialState, $invert = false) |
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{ |
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$action = strtolower($initialState) === 'hide' ? 'removeClass' : 'addClass'; |
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if ($invert) { |
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$action = $action === 'removeClass' ? 'addClass' : 'removeClass'; |
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} |
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return sprintf('%s("hide")', $action); |
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} |
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/** |
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* Returns an event name to be dispatched when the field is changed. Matches up with the visibility classes |
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* added or removed in `toggleDisplayText()`. |
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* |
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* @param string $initialState |
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* @param bool $invert |
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* @return string |
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*/ |
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public function toggleDisplayEvent($initialState, $invert = false) |
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{ |
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$action = strtolower($initialState) === 'hide' ? 'show' : 'hide'; |
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if ($invert) { |
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$action = $action === 'hide' ? 'show' : 'hide'; |
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} |
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return sprintf('userform.field.%s', $action); |
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} |
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} |
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