mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-06-28 07:29:26 +02:00
eb583c5f14
API: CompositeDBField::setValue() may be passed an object as its second argument, in addition to array. These changes provide a 15% - 20% performance improvement, and as such justify an small API change in the 3.0 branch. It will likely affect anyone who has created their own composite fields, which is fortunately not all that common.
726 lines
22 KiB
PHP
726 lines
22 KiB
PHP
<?php
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/**
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* A ViewableData object is any object that can be rendered into a template/view.
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*
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* A view interrogates the object being currently rendered in order to get data to render into the template. This data
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* is provided and automatically escaped by ViewableData. Any class that needs to be available to a view (controllers,
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* {@link DataObject}s, page controls) should inherit from this class.
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*
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* @package framework
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* @subpackage view
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*/
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class ViewableData extends Object implements IteratorAggregate {
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/**
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* An array of objects to cast certain fields to. This is set up as an array in the format:
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*
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* <code>
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* public static $casting = array (
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* 'FieldName' => 'ClassToCastTo(Arguments)'
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* );
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* </code>
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*
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* @var array
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*/
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public static $casting = array(
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'CSSClasses' => 'Varchar'
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);
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/**
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* The default object to cast scalar fields to if casting information is not specified, and casting to an object
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* is required.
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*
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* @var string
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*/
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public static $default_cast = 'HTMLText';
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/**
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* @var array
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*/
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private static $casting_cache = array();
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// -----------------------------------------------------------------------------------------------------------------
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/**
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* A failover object to attempt to get data from if it is not present on this object.
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*
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* @var ViewableData
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*/
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protected $failover;
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/**
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* @var ViewableData
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*/
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protected $customisedObject;
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/**
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* @var array
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*/
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private $objCache = array();
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// -----------------------------------------------------------------------------------------------------------------
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/**
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* Converts a field spec into an object creator. For example: "Int" becomes "new Int($fieldName);" and "Varchar(50)"
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* becomes "new Varchar($fieldName, 50);".
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*
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* @param string $fieldSchema The field spec
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* @return string
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*/
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public static function castingObjectCreator($fieldSchema) {
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Deprecation::notice('2.5', 'Use Object::create_from_string() instead');
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}
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/**
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* Convert a field schema (e.g. "Varchar(50)") into a casting object creator array that contains both a className
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* and castingHelper constructor code. See {@link castingObjectCreator} for more information about the constructor.
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*
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* @param string $fieldSchema
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* @return array
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*/
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public static function castingObjectCreatorPair($fieldSchema) {
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Deprecation::notice('2.5', 'Use Object::create_from_string() instead');
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}
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// FIELD GETTERS & SETTERS -----------------------------------------------------------------------------------------
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/**
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* Check if a field exists on this object or its failover.
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*
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* @param string $property
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* @return bool
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*/
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public function __isset($property) {
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return $this->hasField($property) || ($this->failover && $this->failover->hasField($property));
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}
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/**
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* Get the value of a property/field on this object. This will check if a method called get{$property} exists, then
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* check if a field is available using {@link ViewableData::getField()}, then fall back on a failover object.
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*
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* @param string $property
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* @return mixed
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*/
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public function __get($property) {
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if($this->hasMethod($method = "get$property")) {
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return $this->$method();
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} elseif($this->hasField($property)) {
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return $this->getField($property);
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} elseif($this->failover) {
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return $this->failover->$property;
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}
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}
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/**
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* Set a property/field on this object. This will check for the existence of a method called set{$property}, then
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* use the {@link ViewableData::setField()} method.
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*
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* @param string $property
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* @param mixed $value
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*/
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public function __set($property, $value) {
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if($this->hasMethod($method = "set$property")) {
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$this->$method($value);
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} else {
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$this->setField($property, $value);
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}
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}
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/**
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* Check if a field exists on this object. This should be overloaded in child classes.
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*
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* @param string $field
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* @return bool
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*/
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public function hasField($field) {
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return property_exists($this, $field);
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}
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/**
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* Get the value of a field on this object. This should be overloaded in child classes.
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*
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* @param string $field
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* @return mixed
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*/
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public function getField($field) {
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return $this->$field;
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}
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/**
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* Set a field on this object. This should be overloaded in child classes.
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*
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* @param string $field
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* @param mixed $value
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*/
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public function setField($field, $value) {
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$this->$field = $value;
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}
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// -----------------------------------------------------------------------------------------------------------------
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/**
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* Add methods from the {@link ViewableData::$failover} object, as well as wrapping any methods prefixed with an
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* underscore into a {@link ViewableData::cachedCall()}.
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*/
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public function defineMethods() {
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if($this->failover) {
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if(is_object($this->failover)) $this->addMethodsFrom('failover');
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else user_error("ViewableData::\$failover set to a non-object", E_USER_WARNING);
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if(isset($_REQUEST['debugfailover'])) {
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Debug::message("$this->class created with a failover class of {$this->failover->class}");
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}
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}
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foreach($this->allMethodNames() as $method) {
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if($method[0] == '_' && $method[1] != '_') {
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$this->createMethod(
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substr($method, 1), "return \$obj->cachedCall('$method', \$args, '" . substr($method, 1) . "');"
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);
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}
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}
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parent::defineMethods();
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}
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/**
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* Merge some arbitrary data in with this object. This method returns a {@link ViewableData_Customised} instance
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* with references to both this and the new custom data.
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*
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* Note that any fields you specify will take precedence over the fields on this object.
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*
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* @param array|ViewableData $data
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* @return ViewableData_Customised
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*/
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public function customise($data) {
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if(is_array($data) && (empty($data) || ArrayLib::is_associative($data))) {
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$data = new ArrayData($data);
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}
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if($data instanceof ViewableData) {
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return new ViewableData_Customised($this, $data);
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}
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throw new InvalidArgumentException (
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'ViewableData->customise(): $data must be an associative array or a ViewableData instance'
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);
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}
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/**
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* @param ViewableData $object
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*/
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public function setCustomisedObj(ViewableData $object) {
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$this->customisedObject = $object;
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}
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// CASTING ---------------------------------------------------------------------------------------------------------
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/**
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* Get the class a field on this object would be casted to, as well as the casting helper for casting a field to
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* an object (see {@link ViewableData::castingHelper()} for information on casting helpers).
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*
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* The returned array contains two keys:
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* - className: the class the field would be casted to (e.g. "Varchar")
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* - castingHelper: the casting helper for casting the field (e.g. "return new Varchar($fieldName)")
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*
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* @param string $field
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* @return array
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*/
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public function castingHelperPair($field) {
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Deprecation::notice('2.5', 'use castingHelper() instead');
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return $this->castingHelper($field);
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}
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/**
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* Return the "casting helper" (a piece of PHP code that when evaluated creates a casted value object) for a field
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* on this object.
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*
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* @param string $field
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* @return string
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*/
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public function castingHelper($field) {
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if($this->hasMethod('db') && $fieldSpec = $this->db($field)) {
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return $fieldSpec;
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}
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$specs = Config::inst()->get(get_class($this), 'casting');
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if(isset($specs[$field])) return $specs[$field];
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if($this->failover) return $this->failover->castingHelper($field);
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}
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/**
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* Get the class name a field on this object will be casted to
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*
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* @param string $field
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* @return string
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*/
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public function castingClass($field) {
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$spec = $this->castingHelper($field);
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if(!$spec) return null;
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$bPos = strpos($spec,'(');
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if($bPos === false) return $spec;
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else return substr($spec, 0, $bPos);
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}
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/**
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* Return the string-format type for the given field.
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*
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* @param string $field
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* @return string 'xml'|'raw'
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*/
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public function escapeTypeForField($field) {
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if(!$class = $this->castingClass($field)) {
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$class = self::$default_cast;
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}
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return Config::inst()->get($class, 'escape_type', Config::FIRST_SET);
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}
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/**
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* Save the casting cache for this object (including data from any failovers) into a variable
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*
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* @param reference $cache
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*/
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public function buildCastingCache(&$cache) {
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$ancestry = array_reverse(ClassInfo::ancestry($this->class));
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$merge = true;
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foreach($ancestry as $class) {
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if(!isset(self::$casting_cache[$class]) && $merge) {
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$mergeFields = is_subclass_of($class, 'DataObject') ? array('db', 'casting') : array('casting');
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if($mergeFields) foreach($mergeFields as $field) {
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$casting = Config::inst()->get($class, $field, Config::UNINHERITED);
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if($casting) foreach($casting as $field => $cast) {
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if(!isset($cache[$field])) $cache[$field] = self::castingObjectCreatorPair($cast);
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}
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}
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if($class == 'ViewableData') $merge = false;
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} elseif($merge) {
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$cache = ($cache) ? array_merge(self::$casting_cache[$class], $cache) : self::$casting_cache[$class];
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}
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if($class == 'ViewableData') break;
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}
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}
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// TEMPLATE ACCESS LAYER -------------------------------------------------------------------------------------------
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/**
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* Render this object into the template, and get the result as a string. You can pass one of the following as the
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* $template parameter:
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* - a template name (e.g. Page)
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* - an array of possible template names - the first valid one will be used
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* - an SSViewer instance
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*
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* @param string|array|SSViewer $template the template to render into
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* @param array $customFields fields to customise() the object with before rendering
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* @return string
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*/
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public function renderWith($template, $customFields = null) {
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if(!is_object($template)) {
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$template = new SSViewer($template);
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}
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$data = ($this->customisedObject) ? $this->customisedObject : $this;
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if($customFields instanceof ViewableData) {
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$data = $data->customise($customFields);
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}
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if($template instanceof SSViewer) {
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return $template->process($data, is_array($customFields) ? $customFields : null);
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}
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throw new UnexpectedValueException (
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"ViewableData::renderWith(): unexpected $template->class object, expected an SSViewer instance"
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);
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}
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/**
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* Get the value of a field on this object, automatically inserting the value into any available casting objects
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* that have been specified.
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*
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* @param string $fieldName
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* @param array $arguments
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* @param bool $forceReturnedObject if TRUE, the value will ALWAYS be casted to an object before being returned,
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* even if there is no explicit casting information
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* @param string $cacheName a custom cache name
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*/
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public function obj($fieldName, $arguments = null, $forceReturnedObject = true, $cache = false, $cacheName = null) {
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if(isset($_REQUEST['debug_profile'])) {
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Profiler::mark("obj.$fieldName", "on a $this->class object");
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}
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if(!$cacheName) $cacheName = $arguments ? $fieldName . implode(',', $arguments) : $fieldName;
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if(!isset($this->objCache[$cacheName])) {
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// HACK: Don't call the deprecated FormField::Name() method
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$methodIsAllowed = true;
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if($this instanceof FormField && $fieldName == 'Name') $methodIsAllowed = false;
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if($methodIsAllowed && $this->hasMethod($fieldName)) {
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$value = $arguments ? call_user_func_array(array($this, $fieldName), $arguments) : $this->$fieldName();
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} else {
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$value = $this->$fieldName;
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}
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if(!is_object($value) && ($this->castingClass($fieldName) || $forceReturnedObject)) {
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if(!$castConstructor = $this->castingHelper($fieldName)) {
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$castConstructor = $this->stat('default_cast');
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}
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$valueObject = Object::create_from_string($castConstructor, $fieldName);
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$valueObject->setValue($value, $this);
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$value = $valueObject;
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}
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if($cache) $this->objCache[$cacheName] = $value;
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} else {
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$value = $this->objCache[$cacheName];
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}
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if(isset($_REQUEST['debug_profile'])) {
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Profiler::unmark("obj.$fieldName", "on a $this->class object");
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}
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if(!is_object($value) && $forceReturnedObject) {
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$default = Config::inst()->get('ViewableData', 'default_cast', Config::FIRST_SET);
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$value = new $default($fieldName);
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}
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return $value;
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}
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/**
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* A simple wrapper around {@link ViewableData::obj()} that automatically caches the result so it can be used again
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* without re-running the method.
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*
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* @param string $field
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* @param array $arguments
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* @param string $identifier an optional custom cache identifier
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*/
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public function cachedCall($field, $arguments = null, $identifier = null) {
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return $this->obj($field, $arguments, false, true, $identifier);
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}
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/**
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* Checks if a given method/field has a valid value. If the result is an object, this will return the result of the
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* exists method, otherwise will check if the result is not just an empty paragraph tag.
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*
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* @param string $field
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* @param array $arguments
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* @param bool $cache
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* @return bool
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*/
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public function hasValue($field, $arguments = null, $cache = true) {
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$result = $cache ? $this->cachedCall($field, $arguments) : $this->obj($field, $arguments, false, false);
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if(is_object($result) && $result instanceof Object) {
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return $result->exists();
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} else {
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// Empty paragraph checks are a workaround for TinyMCE
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return ($result && $result !== '<p></p>');
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}
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}
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/**#@+
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* @param string $field
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* @param array $arguments
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* @param bool $cache
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* @return string
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*/
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/**
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* Get the string value of a field on this object that has been suitable escaped to be inserted directly into a
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* template.
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*/
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public function XML_val($field, $arguments = null, $cache = false) {
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$result = $this->obj($field, $arguments, false, $cache);
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return (is_object($result) && $result instanceof Object) ? $result->forTemplate() : $result;
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}
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/**
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* Return the value of the field without any escaping being applied.
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*/
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public function RAW_val($field, $arguments = null, $cache = true) {
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return Convert::xml2raw($this->XML_val($field, $arguments, $cache));
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}
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/**
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* Return the value of a field in an SQL-safe format.
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*/
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public function SQL_val($field, $arguments = null, $cache = true) {
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return Convert::raw2sql($this->RAW_val($field, $arguments, $cache));
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}
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/**
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* Return the value of a field in a JavaScript-save format.
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*/
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public function JS_val($field, $arguments = null, $cache = true) {
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return Convert::raw2js($this->RAW_val($field, $arguments, $cache));
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}
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/**
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* Return the value of a field escaped suitable to be inserted into an XML node attribute.
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*/
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public function ATT_val($field, $arguments = null, $cache = true) {
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return Convert::raw2att($this->RAW_val($field, $arguments, $cache));
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}
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/**#@-*/
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/**
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* Get an array of XML-escaped values by field name
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*
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* @param array $elements an array of field names
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* @return array
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*/
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public function getXMLValues($fields) {
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$result = array();
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foreach($fields as $field) {
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$result[$field] = $this->XML_val($field);
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}
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return $result;
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}
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// ITERATOR SUPPORT ------------------------------------------------------------------------------------------------
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/**
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* Return a single-item iterator so you can iterate over the fields of a single record.
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*
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* This is useful so you can use a single record inside a <% control %> block in a template - and then use
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* to access individual fields on this object.
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*
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* @return ArrayIterator
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*/
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public function getIterator() {
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return new ArrayIterator(array($this));
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}
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// UTILITY METHODS -------------------------------------------------------------------------------------------------
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/**
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* When rendering some objects it is necessary to iterate over the object being rendered, to do this, you need
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* access to itself.
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*
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* @return ViewableData
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*/
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public function Me() {
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return $this;
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}
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/**
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* Return the directory if the current active theme (relative to the site root).
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*
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* This method is useful for things such as accessing theme images from your template without hardcoding the theme
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* page - e.g. <img src="$ThemeDir/images/something.gif">.
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*
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* This method should only be used when a theme is currently active. However, it will fall over to the current
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* project directory.
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*
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* @param string $subtheme the subtheme path to get
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* @return string
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*/
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public function ThemeDir($subtheme = false) {
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if($theme = SSViewer::current_theme()) {
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return THEMES_DIR . "/$theme" . ($subtheme ? "_$subtheme" : null);
|
|
}
|
|
|
|
return project();
|
|
}
|
|
|
|
/**
|
|
* Get part of the current classes ancestry to be used as a CSS class.
|
|
*
|
|
* This method returns an escaped string of CSS classes representing the current classes ancestry until it hits a
|
|
* stop point - e.g. "Page DataObject ViewableData".
|
|
*
|
|
* @param string $stopAtClass the class to stop at (default: ViewableData)
|
|
* @return string
|
|
* @uses ClassInfo
|
|
*/
|
|
public function CSSClasses($stopAtClass = 'ViewableData') {
|
|
$classes = array();
|
|
$classAncestry = array_reverse(ClassInfo::ancestry($this->class));
|
|
$stopClasses = ClassInfo::ancestry($stopAtClass);
|
|
|
|
foreach($classAncestry as $class) {
|
|
if(in_array($class, $stopClasses)) break;
|
|
$classes[] = $class;
|
|
}
|
|
|
|
// optionally add template identifier
|
|
if(isset($this->template) && !in_array($this->template, $classes)) {
|
|
$classes[] = $this->template;
|
|
}
|
|
|
|
return Convert::raw2att(implode(' ', $classes));
|
|
}
|
|
|
|
/**
|
|
* Return debug information about this object that can be rendered into a template
|
|
*
|
|
* @return ViewableData_Debugger
|
|
*/
|
|
public function Debug() {
|
|
return new ViewableData_Debugger($this);
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @package framework
|
|
* @subpackage view
|
|
*/
|
|
class ViewableData_Customised extends ViewableData {
|
|
|
|
/**
|
|
* @var ViewableData
|
|
*/
|
|
protected $original, $customised;
|
|
|
|
/**
|
|
* Instantiate a new customised ViewableData object
|
|
*
|
|
* @param ViewableData $originalObject
|
|
* @param ViewableData $customisedObject
|
|
*/
|
|
public function __construct(ViewableData $originalObject, ViewableData $customisedObject) {
|
|
$this->original = $originalObject;
|
|
$this->customised = $customisedObject;
|
|
|
|
$this->original->setCustomisedObj($this);
|
|
|
|
parent::__construct();
|
|
}
|
|
|
|
public function __call($method, $arguments) {
|
|
if($this->customised->hasMethod($method)) {
|
|
return call_user_func_array(array($this->customised, $method), $arguments);
|
|
}
|
|
|
|
return call_user_func_array(array($this->original, $method), $arguments);
|
|
}
|
|
|
|
public function __get($property) {
|
|
if(isset($this->customised->$property)) {
|
|
return $this->customised->$property;
|
|
}
|
|
|
|
return $this->original->$property;
|
|
}
|
|
|
|
public function __set($property, $value) {
|
|
$this->customised->$property = $this->original->$property = $value;
|
|
}
|
|
|
|
public function hasMethod($method) {
|
|
return $this->customised->hasMethod($method) || $this->original->hasMethod($method);
|
|
}
|
|
|
|
public function cachedCall($field, $arguments = null, $identifier = null) {
|
|
if($this->customised->hasMethod($field) || $this->customised->hasField($field)) {
|
|
$result = $this->customised->cachedCall($field, $arguments, $identifier);
|
|
} else {
|
|
$result = $this->original->cachedCall($field, $arguments, $identifier);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
public function obj($fieldName, $arguments = null, $forceReturnedObject = true, $cache = false, $cacheName = null) {
|
|
if($this->customised->hasField($fieldName) || $this->customised->hasMethod($fieldName)) {
|
|
return $this->customised->obj($fieldName, $arguments, $forceReturnedObject, $cache, $cacheName);
|
|
}
|
|
|
|
return $this->original->obj($fieldName, $arguments, $forceReturnedObject, $cache, $cacheName);
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Allows you to render debug information about a {@link ViewableData} object into a template.
|
|
*
|
|
* @package framework
|
|
* @subpackage view
|
|
*/
|
|
class ViewableData_Debugger extends ViewableData {
|
|
|
|
/**
|
|
* @var ViewableData
|
|
*/
|
|
protected $object;
|
|
|
|
/**
|
|
* @param ViewableData $object
|
|
*/
|
|
public function __construct(ViewableData $object) {
|
|
$this->object = $object;
|
|
parent::__construct();
|
|
}
|
|
|
|
/**
|
|
* Return debugging information, as XHTML. If a field name is passed, it will show debugging information on that
|
|
* field, otherwise it will show information on all methods and fields.
|
|
*
|
|
* @param string $field the field name
|
|
* @return string
|
|
*/
|
|
public function forTemplate($field = null) {
|
|
// debugging info for a specific field
|
|
if($field) return "<b>Debugging Information for {$this->class}->{$field}</b><br/>" .
|
|
($this->object->hasMethod($field)? "Has method '$field'<br/>" : null) .
|
|
($this->object->hasField($field) ? "Has field '$field'<br/>" : null) ;
|
|
|
|
// debugging information for the entire class
|
|
$reflector = new ReflectionObject($this->object);
|
|
$debug = "<b>Debugging Information: all methods available in '{$this->object->class}'</b><br/><ul>";
|
|
|
|
foreach($this->object->allMethodNames() as $method) {
|
|
// check that the method is public
|
|
if($method[0] === strtoupper($method[0]) && $method[0] != '_') {
|
|
if($reflector->hasMethod($method) && $method = $reflector->getMethod($method)) {
|
|
if($method->isPublic()) {
|
|
$debug .= "<li>\${$method->getName()}";
|
|
|
|
if(count($method->getParameters())) {
|
|
$debug .= ' <small>(' . implode(', ', $method->getParameters()) . ')</small>';
|
|
}
|
|
|
|
$debug .= '</li>';
|
|
}
|
|
} else {
|
|
$debug .= "<li>\$$method</li>";
|
|
}
|
|
}
|
|
}
|
|
|
|
$debug .= '</ul>';
|
|
|
|
if($this->object->hasMethod('toMap')) {
|
|
$debug .= "<b>Debugging Information: all fields available in '{$this->object->class}'</b><br/><ul>";
|
|
|
|
foreach($this->object->toMap() as $field => $value) {
|
|
$debug .= "<li>\$$field</li>";
|
|
}
|
|
|
|
$debug .= "</ul>";
|
|
}
|
|
|
|
// check for an extra attached data
|
|
if($this->object->hasMethod('data') && $this->object->data() != $this->object) {
|
|
$debug .= ViewableData_Debugger::create($this->object->data())->forTemplate();
|
|
}
|
|
|
|
return $debug;
|
|
}
|
|
|
|
}
|