silverstripe-framework/core/ViewableData.php

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PHP
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<?php
/**
* Generic class for all data that will be accessed from a view.
*
* View interrogate their controllers to provide them with the data they need. They to this by
* calling the methods provided by the ViewableData base-class, from which most Sapphire objects
* are inherited.
*
*
* ViewableData cover page controls, controllers, and data objects. It's the basic unit of
* data exchange. More specifically, it's anything that can be put into a view.
* @package sapphire
* @subpackage view
*/
class ViewableData extends Object implements IteratorAggregate {
/**
* The iterator position.
* @var int
*/
protected $iteratorPos;
/**
* Total number of items in the iterator.
* @var int
*/
protected $iteratorTotalItems;
/**
* Failover object.
* @var ViewableData
*/
protected $failover;
/**
* A cast of this object's controls in object format
* @var array
*/
protected $_object_cache = array();
/**
* A cast of this object's controls in XML-safe format
* @var array
*/
protected $_xml_cache = array();
/**
* A cast of this object's controls in their native format (used by cachedCall)
* @var array
*/
protected $_natural_cache = array();
/**
* @var $customisedObj ViewableData_Customised|ViewableData_ObjectCustomised
* Saves past customisations to make them available on subsequent rendering-calls.
* E.g. This enables LeftAndMain to access customisations on controller-actions in
* Left() and Right().
*/
protected $customisedObj;
/**
* Define custom methods for this object. Called once per class.
* Implements failover and cached methods.
*/
function defineMethods() {
// Set up failover
if($this->failover) {
$this->addMethodsFrom('failover');
}
if(isset($_GET['debugfailover'])) {
Debug::message("$this->class / $this->failover");
}
// Set up cached methods
$methodNames = $this->allMethodNames();
foreach($methodNames as $methodName) {
if($methodName[0] == "_") {
$trimmedName = substr($methodName,1);
$this->createMethod($trimmedName, "return \$obj->cachedCall('$methodName', '$trimmedName', \$args);");
}
}
parent::defineMethods();
}
/**
* Returns a "1 record iterator"
* Views <%control %> tags operate by looping over an item for as many instances as are
* available. When you stick a single ViewableData object in a control tag, the foreach()
* loop still needs to work. We do this by creating an iterator that only returns one record.
* This will always return the current ViewableData object.
* @return ViewableData_Iterator A 1 record iterator
*/
function getIterator() {
return new ViewableData_Iterator($this);
}
/**
* Accessor overloader.
* Allows default getting of fields via $this->getVal(), or mediation via a
* getParamName() method.
* @param string $field The field name.
* @return mixed The field.
*/
public function __get($field) {
if($this->hasMethod($funcName = "get$field")) {
return $this->$funcName();
} else if($this->hasField($field)) {
return $this->getField($field);
} else if($this->failover) {
return $this->failover->$field;
}
}
/**
* Setter overloader.
* Allows default setting of fields in $this->setVal(), or mediation via a
* getParamName() method.
* @param string $field The field name.
* @param mixed $val The field value.
*/
public function __set($field, $val) {
if(method_exists($this, $funcName = "set$field")) {
return $this->$funcName($val);
} else {
$this->setField($field, $val);
}
}
/**
* Is-set overloader.
* Will check to see if the given field exists on this object. Calls the hasField() method,
* as well as checking failover classes.
* @param string $field The field name.
* @return boolean True if field exists
*/
public function __isset($field) {
if($this->hasField($field)) {
return true;
}
if($this->failover && $this->failover->hasField($field)) {
return true;
}
return false;
}
/**
* Get a field by it's name. This should be overloaded in child classes.
* @param string $field fieldname
*/
protected function getField($field) {
}
/**
* Set a fields value. This should be overloaded in child classes.
* @param string $field The field name.
* @param mixed $val The field value.
*/
protected function setField($field, $val) {
$this->$field = $val;
}
/**
* Checks if a field exists on this object. This should be overloaded in child classes.
* @param string $field The field name
* @return boolean
*/
public function hasField($field) {
}
/**
* Cache used by castingHelperPair().
* @var array
*/
protected static $castingHelperPair_cache;
/**
* Returns the "casting helper" for the given field and the casting class name. A casting helper
* is a piece of PHP code that, when evaluated, will create an object to represent the value.
*
* The return value is an map containing two values:
* - className: The name of the class (eg: 'Varchar')
* - castingHelper: The casting helper (eg: 'return new Varchar($fieldName);')
*
* @param string $field The field name
* @return array
*/
public function castingHelperPair($field) {
$class = $this->class;
if(!isset(self::$castingHelperPair_cache[$class])) {
if($this->failover) {
$this->failover->buildCastingHelperCache(self::$castingHelperPair_cache[$class]);
}
$this->buildCastingHelperCache(self::$castingHelperPair_cache[$class]);
self::$castingHelperPair_cache[$class]['ClassName'] = array("className" => "Varchar", "castingHelper" => "return new Varchar(\$fieldName);");
}
return isset(self::$castingHelperPair_cache[$class][$field]) ? self::$castingHelperPair_cache[$class][$field] : null;
}
/**
* A helper function used by castingHelperPair() to build the cache.
* @param array
*/
public function buildCastingHelperCache(&$cache) {
$class = $this->class ? $this->class : get_class($this);
$classes = ClassInfo::ancestry($class);
foreach($classes as $componentClass) {
if($componentClass == "ViewableData") $isViewableData = true;
if($componentClass == "DataObject") $isDataObject = true;
if(isset($isDataObject) && $isDataObject) {
$fields = eval("return {$componentClass}::\$db;");
if($fields) foreach($fields as $fieldName => $fieldSchema) {
$cache[$fieldName] = ViewableData::castingObjectCreatorPair($fieldSchema);
}
}
if(isset($isViewableData) && $isViewableData) {
$fields = eval("return {$componentClass}::\$casting;");
if($fields) foreach($fields as $fieldName => $fieldSchema) {
$cache[$fieldName] = ViewableData::castingObjectCreatorPair($fieldSchema);
}
}
}
}
/**
* Returns the "casting helper" for the given field. A casting helper
* is a piece of PHP code that, when evaluated, will create an object to represent the value.
* @param string $field The field name.
* @return string
*/
public function castingHelper($field) {
$pair = $this->castingHelperPair($field);
return $pair['castingHelper'];
}
/**
* Converts a field spec into an object creator.
* For example: "Int" becomes "new Int($fieldName);" and "Varchar(50)" becomes "new Varchar($fieldName, 50);"
* @param string $fieldSchema The field spec.
* @return string
*/
public static function castingObjectCreator($fieldSchema) {
if(strpos($fieldSchema,'(') === false) {
return "return Object::create('{$fieldSchema}',\$fieldName);";
} else {
return "return new " . ereg_replace('^([^(]+)\\(','\\1($fieldName,', $fieldSchema) . ';';
}
}
/**
* Converts a field spec into an object creator pair; this is a map containing className and castingHelper.
* See {@link castingObjectCreator} for more information.
* @param string $fieldSchema The field spec.
* @return array
*/
public static function castingObjectCreatorPair($fieldSchema) {
if(strpos($fieldSchema,'(') === false) {
return array(
'className' => $fieldSchema,
'castingHelper' => "return Object::create('{$fieldSchema}',\$fieldName);"
);
} else if(ereg('^([^(]+)\\(', $fieldSchema, $parts)) {
return array(
'className' => $parts[1],
'castingHelper' => "return new " . ereg_replace('^([^(]+)\\(','\\1($fieldName,', $fieldSchema) . ';',
);
} else {
user_error("castingObjectCreatorPair: Bad field schema '$fieldSchema' in class $this->class", E_USER_WARNING);
}
}
/**
* Return the string-format type for the given field.
*
* @usedby ViewableData::XML_val()
* @param string $fieldName
* @return string 'xml'|'raw'
*/
function escapeTypeForField($fieldName) {
$helperPair = $this->castingHelperPair($fieldName);
$castedClass = $helperPair['className'];
if(!$castedClass || $castedClass == 'HTMLText' || $castedClass == 'HTMLVarchar') return "xml";
else return "raw";
}
/**
* Return the object version of the given field/method.
* @param string $fieldName The name of the field/method.
* @param array $args The arugments.
* @param boolean $forceReturnObject If true, this method will *always* return an object. If there's
* no sensible one available, it will return new ViewableData()
* @return mixed;
*/
public function obj($fieldName, $args = null, $forceReturnObject = false) {
if(isset($_GET['debug_profile'])) {
Profiler::mark("template($fieldName)", " on $this->class object");
}
if($args) {
$identifier = $fieldName . ',' . implode(',', $args);
} else {
$identifier = $fieldName;
}
// Fix for PHP 5.3 - $args cannot be null
if(is_null($args))
$args=Array();
if(isset($this->_object_cache[$identifier])) {
$fieldObj = $this->_object_cache[$identifier];
} else {
if($this->hasMethod($fieldName)) {
$val = call_user_func_array(array(&$this, $fieldName), $args);
} else {
$val = $this->$fieldName;
}
$this->_natural_cache[$identifier] = $val;
if(is_object($val)) {
$fieldObj = $val;
} else {
$helperPair = $this->castingHelperPair($fieldName);
if(!$helperPair && $this->failover) {
$helperPair = $this->failover->castingHelperPair($fieldName);
}
$constructor = $helperPair['castingHelper'];
if($constructor) {
$fieldObj = eval($constructor);
if($this->hasMethod('getAllFields')) {
$fieldObj->setVal($val, $this->getAllFields());
} else {
$fieldObj->setVal($val);
}
}
}
$this->_object_cache[$identifier] = isset($fieldObj) ? $fieldObj : null;
}
if(!isset($fieldObj) && $forceReturnObject){
$fieldObj = new ViewableData();
}
if(isset($_GET['debug_profile'])) {
Profiler::unmark("template($fieldName)", " on $this->class object");
}
return isset($fieldObj) ? $fieldObj : null;
}
/**
* Return the value (non-object) version of the given field/method.
* @deprecated
*/
public function val($fieldName, $args = null) {
return $this->XML_val($fieldName, $args);
}
/**
* Returns the value of the given field / method in an XML-safe format.
* @param string $fieldName The field name.
* @param array $args The arguments.
* @param boolean $cache Cache calls to this function.
* @return string
*/
public function XML_val($fieldName, $args = null, $cache = false) {
if(isset($_GET['debug_profile'])) {
Profiler::mark("template($fieldName)", " on $this->class object");
}
if($cache) {
if($args) {
$identifier = $fieldName . ',' . implode(',', $args);
} else {
$identifier = $fieldName;
}
if(isset($this->_xml_cache[$identifier])) {
if(isset($_GET['debug_profile'])) {
Profiler::unmark("template($fieldName)", " on $this->class object");
}
return $this->_xml_cache[$identifier];
}
}
// Fix for PHP 5.3 - $args cannot be null
if(is_null($args))
$args=Array();
// This will happen when cachedCall was called on an object; don't bother re-calling the method, just
// do the conversion step below
if($cache && isset($this->_object_cache[$identifier])) {
$val = $this->_object_cache[$identifier];
// Get the field / method
} else {
if($this->hasMethod($fieldName)) {
$val = call_user_func_array(array(&$this, $fieldName), $args);
} else {
$val = $this->$fieldName;
}
if(isset($identifier)) {
$this->_natural_cache[$identifier] = $val;
}
}
// Case 1: object; converted to XML_val() by
if(is_object($val)) {
if($cache) {
$this->_object_cache[$identifier] = $val;
}
$val = $val->forTemplate();
if($cache) {
$this->_xml_cache[$identifier] = $val;
}
} else {
// Identify the 'casted class' of this field, which will give us some hints about what kind of
// data has been returned
if(isset($_GET['debug_profile'])) {
Profiler::mark('casting cost');
}
// Case 2: Check if the value is raw and must be made XML-safe
if($this->escapeTypeForField($fieldName) != 'xml') $val = Convert::raw2xml($val);
if(isset($_GET['debug_profile'])) {
Profiler::unmark('casting cost');
}
if($cache) {
$this->_xml_cache[$identifier] = $val;
}
}
if(isset($_GET['debug_profile'])) {
Profiler::unmark("template($fieldName)", " on $this->class object");
}
return $val;
}
/**
* Return a named array of calls to XML_val with different parameters.
* Each value in the array is used as the first argument to XML_val. The result is a named array of the return values.
*
* The intended use-case is when converting simple templates to PHP methods to optimise code, as we did in the form classes.
* If you're calling renderWith more than a few times on a very simple template, this can be useful.
*
* extract(getXMLValues(array('Title','Field','Message')))
* // You can now use $Title, $Field, and $Message as you would in a template
*
* @param array $elementList The list of field names.
* @return array
*/
public function getXMLValues($elementList) {
foreach($elementList as $elementName) {
$result[$elementName] = $this->XML_val($elementName);
}
return $result;
}
/**
* Return the value of the given field without any escaping.
* @param string $fieldName The field name.
* @param array $args The arguments.
* @return string
*/
public function RAW_val($fieldName, $args = null) {
return Convert::xml2raw($this->XML_val($fieldName, $args));
}
/**
* Return the value of the given field in an SQL safe format.
* @param string $fieldName The field name.
* @param array $args The arguments.
* @return string
*/
public function SQL_val($fieldName, $args = null) {
return Convert::xml2sql($this->XML_val($fieldName, $args));
}
/**
* Return the value of the given field in an JavaScript safe format.
* @param string $fieldName The field name.
* @param array $args The arguments.
* @return string
*/
public function JS_val($fieldName, $args = null) {
return Convert::xml2js($this->XML_val($fieldName, $args));
}
/**
* Return the value of the given field in an XML attribute safe format.
* @param string $fieldName The field name.
* @param array $args The arguments.
* @return string
*/
public function ATT_val($fieldName, $args = null) {
return Convert::xml2att($this->XML_val($fieldName, $args));
}
/**
* SSViewer's data-access method.
* All template calls to ViewableData are fed through this function. It takes care of caching
* data, and linking up parents to support Menu1_Menu2() syntax for nested data.
* @param string $funcName the method to call
* @param string $identifier
* @param array $args The arguments
* @return mixed
*/
function cachedCall($funcName, $identifier = null, $args = null) {
if(isset($_GET['debug_profile'])) {
Profiler::mark("template($funcName)", " on $this->class");
}
if(!$identifier) {
if($args) {
$identifier = $funcName . ',' . implode(',', $args);
} else {
$identifier = $funcName;
}
}
// Fix for PHP 5.3 - $args cannot be null
if(is_null($args))
$args=Array();
if(isset($this->_natural_cache[$identifier])) {
if(isset($_GET['debug_profile'])) {
Profiler::unmark("template($funcName)", " on $this->class");
}
return $this->_natural_cache[$identifier];
}
if($this->hasMethod($funcName)) {
$val = call_user_func_array(array(&$this, $funcName), $args);
} else {
$val = $this->$funcName;
}
$this->_natural_cache[$identifier] = $val;
if(is_object($val)) {
$this->_object_cache[$identifier] = $val;
} else {
$helperPair = $this->castingHelperPair($funcName);
$castedClass = $helperPair['className'];
if($castedClass && $castedClass != 'HTMLText' && $castedClass != 'HTMLVarchar' && $castedClass != 'Text') {
$val = Convert::raw2xml($val);
}
$this->_xml_cache[$identifier] = $val;
}
if(isset($_GET['debug_profile'])) {
Profiler::unmark("template($funcName)", " on $this->class");
}
return $val;
}
/**
* @param $obj ViewableData_Customised|ViewableData_ObjectCustomised
*/
function setCustomisedObj($obj) {
$this->customisedObj = $obj;
}
/**
* Returns true if the given method/parameter has a value
* If the item is an object, it will use the exists() method to determine existence
* @param string $funcName The function name.
* @param array $args The arguments.
* @return boolean
*/
function hasValue($funcName, $args = null) {
$test = $this->cachedCall($funcName, null, $args);
if(is_object($test)) {
return $test->exists();
} else if($test && $test !== '<p></p>') {
return true;
}
}
/**
* Set up the "iterator properties" for this object.
* These are properties that give information about where we are in the set.
* @param int $pos Position in iterator
* @param int $totalItems Total number of items
*/
function iteratorProperties($pos, $totalItems) {
$this->iteratorPos = $pos;
$this->iteratorTotalItems = $totalItems;
}
/**
* Returns true if this item is the first in the container set.
* @return boolean
*/
function First() {
return $this->iteratorPos == 0;
}
/**
* Returns true if this item is the last in the container set.
* @return boolean
*/
function Last() {
return $this->iteratorPos == $this->iteratorTotalItems - 1;
}
/**
* Returns 'first' if this item is the first in the container set.
* Returns 'last' if this item is the last in the container set.
*/
function FirstLast() {
if($this->iteratorPos == 0) {
return "first";
} else if($this->iteratorPos == $this->iteratorTotalItems - 1) {
return "last";
} else {
return "";
}
}
/**
* Returns 'middle' if this item is between first and last.
* @return boolean
*/
function MiddleString(){
if($this->Middle())
return "middle";
else
return "";
}
/**
* Returns true if this item is one of the middle items in the container set.
* @return boolean
*/
function Middle() {
return $this->iteratorPos > 0 && $this->iteratorPos < $this->iteratorTotalItems - 1;
}
/**
* Returns true if this item is an even item in the container set.
* @return boolean
*/
function Even() {
return $this->iteratorPos % 2;
}
/**
* Returns true if this item is an even item in the container set.
* @return boolean
*/
function Odd() {
return !$this->iteratorPos % 2;
}
/**
* Returns 'even' if this item is an even item in the container set.
* Returns 'odd' if this item is an odd item in the container set.
* @return string
*/
function EvenOdd() {
return $this->Even() ? 'even' : 'odd';
}
/**
* Returns the numerical number of this item in the dataset.
* The count starts from $startIndex, which defaults to 1.
* @param int $startIndex Number to start count from.
* @return int
*/
function Pos($startIndex = 1) {
return $this->iteratorPos + $startIndex;
}
/**
* Return the total number of "sibling" items in the dataset.
* @return int
*/
function TotalItems() {
return $this->iteratorTotalItems;
}
/**
* Returns the currently logged in user.
* @return Member
*/
function CurrentMember() {
return Member::currentUser();
}
/**
* Returns the Security ID.
* This is used to prevent CRSF attacks in forms.
* @return int
*/
function SecurityID() {
if(Session::get('SecurityID')) {
$securityID = Session::get('SecurityID');
} else {
$securityID = rand();
Session::set('SecurityID', $securityID);
}
return $securityID;
}
/**
* Checks if the current user has the given permission.
* Can be used to implement security-specific sections within templates
* @return int The Permission record-ID if the permission can be found, null otherwise
*/
function HasPerm($permCode) {
return Permission::check($permCode);
}
/**
* Add some arbitrary data to this viewabledata object. Returns a new object with the
* merged data.
* @param mixed $data The data to add.
* @return ViewableData
*/
function customise($data) {
if(is_array($data)) {
return new ViewableData_Customised($this, $data);
} else if(is_object($data)) {
return new ViewableData_ObjectCustomised($this, $data);
} else {
return $this;
}
}
/**
* Render this data using the given template, and return the result as a string
* You can pass one of the following:
* - A template name.
* - An array of template names. The first template that exists will be used.
* - An SSViewer object.
* @param string|array|SSViewer The template.
* @return string
*/
function renderWith($template) {
if(!is_object($template)) {
$template = new SSViewer($template);
}
// if the object is already customised (e.g. through Controller->run()), use it
$obj = ($this->customisedObj) ? $this->customisedObj : $this;
if(is_a($template,'SSViewer')) {
return $template->process($obj);
} else {
user_error("ViewableData::renderWith() Was passed a $template->class object instead of a SSViewer object", E_USER_ERROR);
}
}
/**
* Return the site's absolute base URL, with a slash on the end.
* @return string
*/
function BaseHref() {
return Director::absoluteBaseURL();
}
/**
* When rendering some objects it is necessary to iterate over the object being rendered, to
* do this, you need access to itself.
*
* @return ViewableData
*/
function Me() {
return $this;
}
/**
* Returns wether the current request is triggered
* by an XMLHTTPRequest object.
*
* @return bool
*/
function IsAjax() {
return Director::is_ajax();
}
/**
* Return a Debugger object.
* This is set up like so that you can put $Debug.Content into your template to get debugging
* information about $Content.
* @return ViewableData_Debugger
*/
function Debug() {
$d = new ViewableData_Debugger($this);
return $d->forTemplate();
}
/**
* Returns the current controller
* @return Controller
*/
function CurrentPage() {
return Controller::curr();
}
/**
* Returns the top level ViewableData being rendered.
* @return ViewableData
*/
function Top() {
return SSViewer::topLevel();
}
/**
* Returns the root directory of the theme we're working with.
* This can be useful for referencing images within the theme. For example, you might put a reference to
* <img src="$ThemeDir/images/something.gif"> in your template.
*
* If your image is within a subtheme, such as mytheme_forum, you can set the subtheme parameter. For example,
* <img src="$ThemeDir(forum)/images/something.gif">
*
* We don't recommend that you use this method when no theme is selected. That is, we recommend that you only put
* $ThemeDir into your theme templates. However, if no theme is selected, this will be the project folder/
*
* @param subtheme The subtheme name.
*/
public function ThemeDir($subtheme = null) {
$theme = SSViewer::current_theme();
if($theme) {
return "themes/$theme" . ($subtheme ? "_$subtheme" : "");
} else {
return project();
}
}
/**
* Get part of class ancestry for css-class-usage.
* Avoids having to subclass just to built templates with new css-classes,
* and allows for versatile css inheritance and overrides.
*
* <example>
* <body class="$CSSClasses">
* </example>
*
* @uses {@link ClassInfo}
*
* @param string Classname to stop traversing upwards the ancestry (Default: ViewableData)
* @return string space-separated attribute encoded classes
*/
function CSSClasses($stopAtClass = false) {
global $_ALL_CLASSES;
if(!$stopAtClass) $stopAtClass = 'ViewableData';
$classes = array();
$classAnchestry = ClassInfo::ancestry($this->class);
$viewableDataAnchestry = ClassInfo::ancestry($stopAtClass);
foreach($classAnchestry as $anchestor) {
if(!in_array($anchestor, $viewableDataAnchestry)) $classes[] = $anchestor;
}
// optionally add template identifier
if(isset($this->template) && $this->template != $this->class) {
$classes[] = $this->template;
}
return Convert::raw2att(implode(" ", $classes));
}
/**
* Object-casting information for class methods
* @var mixed
*/
public static $casting = array(
'BaseHref' => 'Varchar',
'CSSClasses' => 'Varchar',
);
/**
* Keep a record of the parent node of this data node.
* @var mixed
*/
protected $parent = null;
/**
* Keep a record of the parent node of this data node.
* @var mixed
*/
protected $namedAs = null;
}
/**
* A ViewableData object that has been customised with extra data. Use
* ViewableData->customise() to create.
* @package sapphire
* @subpackage view
*/
class ViewableData_Customised extends ViewableData {
public function castingHelperPair($field) {
return $this->obj->castingHelperPair($field);
}
function __construct($obj, $extraData) {
$this->obj = $obj;
$this->obj->setCustomisedObj($this);
$this->extraData = $extraData;
parent::__construct();
}
function __call($funcName, $args) {
if(isset($this->extraData[$funcName])) {
return $this->extraData[$funcName];
} else {
return call_user_func_array(array(&$this->obj, $funcName), $args);
}
}
function __get($fieldName) {
if(isset($this->extraData[$fieldName])) {
return $this->extraData[$fieldName];
}
return $this->obj->$fieldName;
}
function __set($fieldName, $val) {
if(isset($this->extraData[$fieldName])) unset($this->extraData[$fieldName]);
return $this->obj->$fieldName = $val;
}
function hasMethod($funcName) {
return isset($this->extraData[$funcName]) || $this->obj->hasMethod($funcName);
}
function XML_val($fieldName, $args = null) {
if(isset($this->extraData[$fieldName])) {
if(isset($_GET['debug_profile'])) {
Profiler::mark("template($fieldName)", " on $this->class object");
}
if(is_object($this->extraData[$fieldName])) {
$val = $this->extraData[$fieldName]->forTemplate();
} else {
$val = $this->extraData[$fieldName];
}
if(isset($_GET['debug_profile'])) {
Profiler::unmark("template($fieldName)", " on $this->class object");
}
return $val;
} else {
return $this->obj->XML_val($fieldName, $args);
}
}
function obj($fieldName, $args = null, $forceReturnObject = false) {
if(isset($this->extraData[$fieldName])) {
if(!is_object($this->extraData[$fieldName])) {
user_error("ViewableData_Customised::obj() '$fieldName' was requested from the array data as an object but it's not an object. I can't cast it.", E_USER_WARNING);
}
return $this->extraData[$fieldName];
} else {
return $this->obj->obj($fieldName, $args, $forceReturnObject);
}
}
function cachedCall($funcName, $identifier = null, $args = null) {
if(isset($this->extraData[$funcName])) {
return $this->extraData[$funcName];
} else {
return $this->obj->cachedCall($funcName, $identifier, $args);
}
}
function customise($data) {
if(is_array($data)) {
$this->extraData = array_merge($this->extraData, $data);
return $this;
} else {
return parent::customise($data);
}
}
/**
* Original ViewableData object
* @var ViewableDate
*/
protected $obj;
/**
* Array containing the extra data
* @var array
*/
protected $extraData;
}
/**
* A ViewableData object that has been customised with an extra object. Use
* ViewableData->customise() to create.
* @package sapphire
* @subpackage view
*/
class ViewableData_ObjectCustomised extends ViewableData {
function __construct($obj, $extraObj) {
$this->obj = $obj;
$this->extraObj = $extraObj;
$this->obj->setCustomisedObj($this);
parent::__construct();
}
function __call($funcName, $args) {
if($this->extraObj->hasMethod($funcName)) {
return call_user_func_array(array(&$this->extraObj, $funcName), $args);
} else {
return call_user_func_array(array(&$this->obj, $funcName), $args);
}
}
function __get($fieldName) {
if($this->extraObj->hasField($fieldName)) {
return $this->extraObj->$fieldName;
} else {
return $this->obj->$fieldName;
}
}
function __set($fieldName, $val) {
$this->extraObj->$fieldName = $val;
$this->obj->$fieldName = $val;
}
function hasMethod($funcName) {
return $this->extraObj->hasMethod($funcName) || $this->obj->hasMethod($funcName);
}
function cachedCall($funcName, $identifier = null, $args = null) {
$result = $this->extraObj->cachedCall($funcName, $identifier, $args);
if(!$result) {
$result = $this->obj->cachedCall($funcName, $identifier, $args);
}
return $result;
}
function obj($fieldName, $args = null, $forceReturnObject = false) {
if($this->extraObj->hasMethod($fieldName) || $this->extraObj->hasField($fieldName)) {
return $this->extraObj->obj($fieldName, $args, $forceReturnObject);
} else {
return $this->obj->obj($fieldName, $args, $forceReturnObject);
}
}
/**
* The extra object.
* @var ViewableData
*/
protected $extraObj;
/**
* The original object.
* @var ViewableData
*/
protected $obj;
}
/**
* Debugger helper.
* @package sapphire
* @subpackage view
* @todo Finish this off
*/
class ViewableData_Debugger extends ViewableData {
/**
* The original object
* @var ViewableData
*/
protected $obj;
function __construct($obj) {
$this->obj = $obj;
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.
* @var string $field The field name.
* @return string
*/
function forTemplate($field = null) {
if($field) {
return "<b>Info on $field:<br/>" .
($this->obj->hasMethod($field) ? "Has method '$field'. " : "") .
($this->obj->hasField($field) ? "Has field '$field'. " : "");
} else {
echo "<b>Debug: all methods available in {$this->obj->class}</b><br/>";
echo "<ul>";
$names = $this->obj->allMethodNames();
foreach($names as $name) {
if(strtoupper($name[0]) == $name[0] && $name[0] != "_") {
echo "<li>\$$name</li>";
}
}
echo "</ul>";
if($this->obj->hasMethod('getAllFields')) {
echo "<b>Debug: all fields available in {$this->obj->class}</b><br/>";
echo "<ul>";
$data = $this->obj->getAllFields();
foreach($data as $key => $val) {
echo "<li>\$$key</li>";
}
echo "</ul>";
}
}
if($this->obj->hasMethod('data')) {
if($this->obj->data() != $this->obj) {
$d = new ViewableData_Debugger($this->obj->data());
echo $d->forTemplate();
}
}
}
}
/**
* Implementation of a "1 record iterator"
* Views <%control %> tags operate by looping over an item for as many instances as are
* available. When you stick a single ViewableData object in a control tag, the foreach()
* loop still needs to work. We do this by creating an iterator that only returns one record.
* This will always return the current ViewableData object.
*/
class ViewableData_Iterator implements Iterator {
function __construct($viewableData) {
$this->viewableData = $viewableData;
$this->show = true;
}
/**
* Internal state toggler
* @var bool
*/
private $show;
/**
* This will always return the current ViewableData object.
*/
public function current() {
if($this->show) {
return $this->viewableData;
}
}
/**
* Rewinds the iterator back to the start.
*/
public function rewind() {
$this->show = true;
}
/**
* Return the key for the current object.
*/
public function key() {
return 0;
}
/**
* Get the next object.
*/
public function next() {
if($this->show) {
$this->show = false;
return $this->viewableData;
} else {
return null;
}
}
/**
* Check if there is a current object.
*/
public function valid() {
return $this->show;
}
}
?>