silverstripe-userforms/code/model/EditableCustomRule.php

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<?php
/**
* A custom rule for showing / hiding an EditableFormField
* based the value of another EditableFormField.
*
* @method EditableFormField Parent()
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* @package userforms
*
* @property string Display
* @property string ConditionOption
* @property string FieldValue
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*/
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class EditableCustomRule extends DataObject
{
private static $condition_options = array(
"IsBlank" => "Is blank",
"IsNotBlank" => "Is not blank",
"HasValue" => "Equals",
"ValueNot" => "Doesn't equal",
"ValueLessThan" => "Less than",
"ValueLessThanEqual" => "Less than or equal",
"ValueGreaterThan" => "Greater than",
"ValueGreaterThanEqual" => "Greater than or equal"
);
private static $db = array(
'Display' => 'Enum("Show,Hide")',
'ConditionOption' => 'Enum("IsBlank,IsNotBlank,HasValue,ValueNot,ValueLessThan,ValueLessThanEqual,ValueGreaterThan,ValueGreaterThanEqual")',
'FieldValue' => 'Varchar(255)'
);
private static $has_one = array(
'Parent' => 'EditableFormField',
'ConditionField' => 'EditableFormField'
);
/**
* Built in extensions required
*
* @config
* @var array
*/
private static $extensions = array(
"Versioned('Stage', 'Live')"
);
/**
* Publish this custom rule to the live site
*
* Wrapper for the {@link Versioned} publish function
*/
public function doPublish($fromStage, $toStage, $createNewVersion = false)
{
$this->publish($fromStage, $toStage, $createNewVersion);
}
/**
* Delete this custom rule from a given stage
*
* Wrapper for the {@link Versioned} deleteFromStage function
*/
public function doDeleteFromStage($stage)
{
$this->deleteFromStage($stage);
}
/**
* @param Member $member
* @return bool
*/
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public function canDelete($member = null)
{
return $this->canEdit($member);
}
/**
* @param Member $member
* @return bool
*/
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public function canEdit($member = null)
{
return $this->Parent()->canEdit($member);
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}
/**
* @param Member $member
* @return bool
*/
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public function canView($member = null)
{
return $this->Parent()->canView($member);
}
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/**
* Return whether a user can create an object of this type
*
* @param Member $member
* @param array $context Virtual parameter to allow context to be passed in to check
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* @return bool
*/
public function canCreate($member = null)
{
// Check parent page
$parent = $this->getCanCreateContext(func_get_args());
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if ($parent) {
return $parent->canEdit($member);
}
// Fall back to secure admin permissions
return parent::canCreate($member);
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}
/**
* Helper method to check the parent for this object
*
* @param array $args List of arguments passed to canCreate
* @return DataObject Some parent dataobject to inherit permissions from
*/
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protected function getCanCreateContext($args)
{
// Inspect second parameter to canCreate for a 'Parent' context
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if (isset($args[1]['Parent'])) {
return $args[1]['Parent'];
}
// Hack in currently edited page if context is missing
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if (Controller::has_curr() && Controller::curr() instanceof CMSMain) {
return Controller::curr()->currentPage();
}
// No page being edited
return null;
}
/**
* @param Member $member
* @return bool
*/
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public function canPublish($member = null)
{
return $this->canEdit($member);
}
/**
* @param Member $member
* @return bool
*/
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public function canUnpublish($member = null)
{
return $this->canDelete($member);
}
/**
* Substitutes configured rule logic with it's JS equivalents and returns them as array elements
* @return array
*/
public function buildExpression()
{
/** @var EditableFormField $formFieldWatch */
$formFieldWatch = $this->ConditionField();
//Encapsulated the action to the object
$action = $formFieldWatch->getJsEventHandler();
// is this field a special option field
$checkboxField = $formFieldWatch->isCheckBoxField();
$radioField = $formFieldWatch->isRadioField();
$target = sprintf('$("%s")', $formFieldWatch->getSelectorFieldOnly());
$fieldValue = Convert::raw2js($this->FieldValue);
$conditionOptions = array(
'ValueLessThan' => '<',
'ValueLessThanEqual' => '<=',
'ValueGreaterThan' => '>',
'ValueGreaterThanEqual' => '>='
);
// and what should we evaluate
switch ($this->ConditionOption) {
case 'IsNotBlank':
case 'IsBlank':
$expression = ($checkboxField || $radioField) ? "!{$target}.is(\":checked\")" : "{$target}.val() == ''";
if ($this->ConditionOption == 'IsNotBlank') {
//Negate
$expression = "!({$expression})";
}
break;
case 'HasValue':
case 'ValueNot':
if ($checkboxField) {
if ($formFieldWatch->isCheckBoxGroupField()) {
$expression = sprintf("$.inArray('%s', %s.filter(':checked').map(function(){ return $(this).val();}).get()) > -1",
$fieldValue, $target);
} else {
$expression = "{$target}.prop('checked')";
}
} elseif ($radioField) {
// We cannot simply get the value of the radio group, we need to find the checked option first.
$expression = sprintf('%s.closest(".field, .control-group").find("input:checked").val() == "%s"',
$target, $fieldValue);
} else {
$expression = sprintf('%s.val() == "%s"', $target, $fieldValue);
}
if ($this->ConditionOption == 'ValueNot') {
//Negate
$expression = "!({$expression})";
}
break;
case 'ValueLessThan':
case 'ValueLessThanEqual':
case 'ValueGreaterThan':
case 'ValueGreaterThanEqual':
$expression = sprintf('%s.val() %s parseFloat("%s")', $target,
$conditionOptions[$this->ConditionOption], $fieldValue);
break;
default:
throw new LogicException("Unhandled rule {$this->ConditionOption}");
break;
}
$result = array(
'operation' => $expression,
'event' => $action,
);
return $result;
}
/**
* Returns the opposite of the show/hide pairs of strings
*
* @param string $text
*
* @return string
*/
public function toggleDisplayText($text)
{
return (strtolower($text) === 'show') ? 'hide' : 'show';
}
}