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<?php
/**
* A list designed to hold form field instances.
*
* @package forms
* @subpackage fields-structural
*/
class FieldList extends ArrayList {
/**
* Cached flat representation of all fields in this set,
* including fields nested in {@link CompositeFields}.
*
* @uses self::collateDataFields()
* @var array
*/
protected $sequentialSet;
/**
* @var array
*/
protected $sequentialSaveableSet;
/**
* @todo Documentation
*/
protected $containerField;
public function __construct($items = array()) {
if (!is_array($items) || func_num_args() > 1) {
$items = func_get_args();
}
parent::__construct($items);
foreach ($items as $item) {
if ($item instanceof FormField) $item->setContainerFieldSet($this);
}
}
/**
* Return a sequential set of all fields that have data. This excludes wrapper composite fields
* as well as heading / help text fields.
*/
public function dataFields() {
if(!$this->sequentialSet) $this->collateDataFields($this->sequentialSet);
return $this->sequentialSet;
}
public function saveableFields() {
if(!$this->sequentialSaveableSet) $this->collateDataFields($this->sequentialSaveableSet, true);
return $this->sequentialSaveableSet;
}
protected function flushFieldsCache() {
$this->sequentialSet = null;
$this->sequentialSaveableSet = null;
}
protected function collateDataFields(&$list, $saveableOnly = false) {
foreach($this as $field) {
if($field->isComposite()) $field->collateDataFields($list, $saveableOnly);
if($saveableOnly) {
$isIncluded = ($field->hasData() && !$field->isReadonly() && !$field->isDisabled());
} else {
$isIncluded = ($field->hasData());
}
if($isIncluded) {
$name = $field->getName();
if(isset($list[$name])) {
$errSuffix = "";
if($this->form) $errSuffix = " in your '{$this->form->class}' form called '" . $this->form->Name() . "'";
else $errSuffix = '';
user_error("collateDataFields() I noticed that a field called '$name' appears twice$errSuffix.", E_USER_ERROR);
}
$list[$name] = $field;
}
}
}
/**
* Add an extra field to a tab within this FieldList.
* This is most commonly used when overloading getCMSFields()
*
* @param string $tabName The name of the tab or tabset. Subtabs can be referred to as TabSet.Tab or TabSet.Tab.Subtab.
* This function will create any missing tabs.
* @param FormField $field The {@link FormField} object to add to the end of that tab.
* @param string $insertBefore The name of the field to insert before. Optional.
*/
public function addFieldToTab($tabName, $field, $insertBefore = null) {
// This is a cache that must be flushed
$this->flushFieldsCache();
// Find the tab
$tab = $this->findOrMakeTab($tabName);
// Add the field to the end of this set
if($insertBefore) $tab->insertBefore($field, $insertBefore);
else $tab->push($field);
}
/**
* Add a number of extra fields to a tab within this FieldList.
* This is most commonly used when overloading getCMSFields()
*
* @param string $tabName The name of the tab or tabset. Subtabs can be referred to as TabSet.Tab or TabSet.Tab.Subtab.
* This function will create any missing tabs.
* @param array $fields An array of {@link FormField} objects.
*/
public function addFieldsToTab($tabName, $fields, $insertBefore = null) {
$this->flushFieldsCache();
// Find the tab
$tab = $this->findOrMakeTab($tabName);
// Add the fields to the end of this set
foreach($fields as $field) {
// Check if a field by the same name exists in this tab
if($insertBefore) {
$tab->insertBefore($field, $insertBefore);
} elseif($tab->fieldByName($field->getName())) {
// It exists, so we need to replace the old one
$this->replaceField($field->getName(), $field);
} else {
$tab->push($field);
}
}
}
/**
* Remove the given field from the given tab in the field.
*
* @param string $tabName The name of the tab
* @param string $fieldName The name of the field
*/
public function removeFieldFromTab($tabName, $fieldName) {
$this->flushFieldsCache();
// Find the tab
$tab = $this->findOrMakeTab($tabName);
$tab->removeByName($fieldName);
}
/**
* Removes a number of fields from a Tab/TabSet within this FieldList.
*
* @param string $tabName The name of the Tab or TabSet field
* @param array $fields A list of fields, e.g. array('Name', 'Email')
*/
public function removeFieldsFromTab($tabName, $fields) {
$this->flushFieldsCache();
// Find the tab
$tab = $this->findOrMakeTab($tabName);
// Add the fields to the end of this set
foreach($fields as $field) $tab->removeByName($field);
}
/**
* Remove a field from this FieldList by Name.
* The field could also be inside a CompositeField.
*
* @param string $fieldName The name of the field or tab
* @param boolean $dataFieldOnly If this is true, then a field will only
* be removed if it's a data field. Dataless fields, such as tabs, will
* be left as-is.
*/
public function removeByName($fieldName, $dataFieldOnly = false) {
if(!$fieldName) {
user_error('FieldList::removeByName() was called with a blank field name.', E_USER_WARNING);
}
$this->flushFieldsCache();
foreach($this->items as $i => $child) {
if(is_object($child)){
$childName = $child->getName();
if(!$childName) $childName = $child->Title();
if(($childName == $fieldName) && (!$dataFieldOnly || $child->hasData())) {
array_splice( $this->items, $i, 1 );
break;
} else if($child->isComposite()) {
$child->removeByName($fieldName, $dataFieldOnly);
}
}
}
}
/**
* Replace a single field with another. Ignores dataless fields such as Tabs and TabSets
*
* @param string $fieldName The name of the field to replace
* @param FormField $newField The field object to replace with
* @return boolean TRUE field was successfully replaced
* FALSE field wasn't found, nothing changed
*/
public function replaceField($fieldName, $newField) {
$this->flushFieldsCache();
foreach($this->items as $i => $field) {
if(is_object($field)) {
if($field->getName() == $fieldName && $field->hasData()) {
$this->items[$i] = $newField;
return true;
} else if($field->isComposite()) {
if($field->replaceField($fieldName, $newField)) return true;
}
}
}
return false;
}
/**
* Rename the title of a particular field name in this set.
*
* @param string $fieldName Name of field to rename title of
* @param string $newFieldTitle New title of field
* @return boolean
*/
function renameField($fieldName, $newFieldTitle) {
$field = $this->dataFieldByName($fieldName);
if(!$field) return false;
$field->setTitle($newFieldTitle);
return $field->Title() == $newFieldTitle;
}
/**
* @return boolean
*/
public function hasTabSet() {
foreach($this->items as $i => $field) {
if(is_object($field) && $field instanceof TabSet) {
return true;
}
}
return false;
}
/**
* Returns the specified tab object, creating it if necessary.
*
* @todo Support recursive creation of TabSets
*
* @param string $tabName The tab to return, in the form "Tab.Subtab.Subsubtab".
* Caution: Does not recursively create TabSet instances, you need to make sure everything
* up until the last tab in the chain exists.
* @param string $title Natural language title of the tab. If {@link $tabName} is passed in dot notation,
* the title parameter will only apply to the innermost referenced tab.
* The title is only changed if the tab doesn't exist already.
* @return Tab The found or newly created Tab instance
*/
public function findOrMakeTab($tabName, $title = null) {
$parts = explode('.',$tabName);
// We could have made this recursive, but I've chosen to keep all the logic code within FieldList rather than add it to TabSet and Tab too.
$currentPointer = $this;
foreach($parts as $k => $part) {
$parentPointer = $currentPointer;
$currentPointer = $currentPointer->fieldByName($part);
// Create any missing tabs
if(!$currentPointer) {
if(is_a($parentPointer, 'TabSet')) {
// use $title on the innermost tab only
if($title && $k == count($parts)-1) {
$currentPointer = new Tab($part, $title);
} else {
$currentPointer = new Tab($part);
}
$parentPointer->push($currentPointer);
} else {
$withName = ($parentPointer->hasMethod('Name')) ? " named '{$parentPointer->getName()}'" : null;
user_error("FieldList::addFieldToTab() Tried to add a tab to object '{$parentPointer->class}'{$withName} - '$part' didn't exist.", E_USER_ERROR);
}
}
}
return $currentPointer;
}
/**
* Returns a named field.
* You can use dot syntax to get fields from child composite fields
*
* @todo Implement similiarly to dataFieldByName() to support nested sets - or merge with dataFields()
*/
public function fieldByName($name) {
if(strpos($name,'.') !== false) list($name, $remainder) = explode('.',$name,2);
else $remainder = null;
foreach($this->items as $child) {
if(trim($name) == trim($child->getName()) || $name == $child->id) {
if($remainder) {
if($child->isComposite()) {
return $child->fieldByName($remainder);
} else {
user_error("Trying to get field '$remainder' from non-composite field $child->class.$name", E_USER_WARNING);
return null;
}
} else {
return $child;
}
}
}
}
/**
* Returns a named field in a sequential set.
* Use this if you're using nested FormFields.
*
* @param string $name The name of the field to return
* @return FormField instance
*/
public function dataFieldByName($name) {
if($dataFields = $this->dataFields()) {
foreach($dataFields as $child) {
if(trim($name) == trim($child->getName()) || $name == $child->id) return $child;
}
}
}
/**
* Inserts a field before a particular field in a FieldList.
*
* @param FormField $item The form field to insert
* @param string $name Name of the field to insert before
*/
public function insertBefore($item, $name) {
$this->onBeforeInsert($item);
$item->setContainerFieldSet($this);
$i = 0;
foreach($this->items as $child) {
if($name == $child->getName() || $name == $child->id) {
array_splice($this->items, $i, 0, array($item));
return $item;
} elseif($child->isComposite()) {
$ret = $child->insertBefore($item, $name);
if($ret) return $ret;
}
$i++;
}
return false;
}
/**
* Inserts a field after a particular field in a FieldList.
*
* @param FormField $item The form field to insert
* @param string $name Name of the field to insert after
*/
public function insertAfter($item, $name) {
$this->onBeforeInsert($item);
$item->setContainerFieldSet($this);
$i = 0;
foreach($this->items as $child) {
if($name == $child->getName() || $name == $child->id) {
array_splice($this->items, $i+1, 0, array($item));
return $item;
} elseif($child->isComposite()) {
$ret = $child->insertAfter($item, $name);
if($ret) return $ret;
}
$i++;
}
return false;
}
/**
* Push a single field into this FieldList instance.
*
* @param FormField $item The FormField to add
* @param string $key An option array key (field name)
*/
public function push($item, $key = null) {
$this->onBeforeInsert($item);
$item->setContainerFieldSet($this);
return parent::push($item, $key = null);
}
/**
* Handler method called before the FieldList is going to be manipulated.
*/
protected function onBeforeInsert($item) {
$this->flushFieldsCache();
if($item->getName()) $this->rootFieldSet()->removeByName($item->getName(), true);
}
/**
* Set the Form instance for this FieldList.
*
* @param Form $form The form to set this FieldList to
*/
public function setForm($form) {
foreach($this as $field) $field->setForm($form);
return $this;
}
/**
* Load the given data into this form.
*
* @param data An map of data to load into the FieldList
*/
public function setValues($data) {
foreach($this->dataFields() as $field) {
$fieldName = $field->getName();
if(isset($data[$fieldName])) $field->setValue($data[$fieldName]);
}
return $this;
}
/**
* Return all <input type="hidden"> fields
* in a form - including fields nested in {@link CompositeFields}.
* Useful when doing custom field layouts.
*
* @return FieldList
*/
function HiddenFields() {
$hiddenFields = new FieldList();
$dataFields = $this->dataFields();
if($dataFields) foreach($dataFields as $field) {
if($field instanceof HiddenField) $hiddenFields->push($field);
}
return $hiddenFields;
}
/**
* Return all fields except for the hidden fields.
* Useful when making your own simplified form layouts.
*/
function VisibleFields() {
$visibleFields = new FieldList();
foreach($this as $field) {
if(!($field instanceof HiddenField)) $visibleFields->push($field);
}
return $visibleFields;
}
/**
* Transform this FieldList with a given tranform method,
* e.g. $this->transform(new ReadonlyTransformation())
*
* @return FieldList
*/
function transform($trans) {
$this->flushFieldsCache();
$newFields = new FieldList();
foreach($this as $field) {
$newFields->push($field->transform($trans));
}
return $newFields;
}
/**
* Returns the root field set that this belongs to
*/
function rootFieldSet() {
if($this->containerField) return $this->containerField->rootFieldSet();
else return $this;
}
function setContainerField($field) {
$this->containerField = $field;
return $this;
}
/**
* Transforms this FieldList instance to readonly.
*
* @return FieldList
*/
function makeReadonly() {
return $this->transform(new ReadonlyTransformation());
}
/**
* Transform the named field into a readonly feld.
*
* @param string|FormField
*/
function makeFieldReadonly($field) {
$fieldName = ($field instanceof FormField) ? $field->getName() : $field;
$srcField = $this->dataFieldByName($fieldName);
$this->replaceField($fieldName, $srcField->performReadonlyTransformation());
}
/**
* Change the order of fields in this FieldList by specifying an ordered list of field names.
* This works well in conjunction with SilverStripe's scaffolding functions: take the scaffold, and
* shuffle the fields around to the order that you want.
*
* Please note that any tabs or other dataless fields will be clobbered by this operation.
*
* @param array $fieldNames Field names can be given as an array, or just as a list of arguments.
*/
function changeFieldOrder($fieldNames) {
// Field names can be given as an array, or just as a list of arguments.
if(!is_array($fieldNames)) $fieldNames = func_get_args();
// Build a map of fields indexed by their name. This will make the 2nd step much easier.
$fieldMap = array();
foreach($this->dataFields() as $field) $fieldMap[$field->getName()] = $field;
// Iterate through the ordered list of names, building a new array to be put into $this->items.
// While we're doing this, empty out $fieldMap so that we can keep track of leftovers.
// Unrecognised field names are okay; just ignore them
$fields = array();
foreach($fieldNames as $fieldName) {
if(isset($fieldMap[$fieldName])) {
$fields[] = $fieldMap[$fieldName];
unset($fieldMap[$fieldName]);
}
}
// Add the leftover fields to the end of the list.
$fields = $fields + array_values($fieldMap);
// Update our internal $this->items parameter.
$this->items = $fields;
$this->flushFieldsCache();
}
/**
* Find the numerical position of a field within
* the children collection. Doesn't work recursively.
*
* @param string|FormField
* @return Position in children collection (first position starts with 0). Returns FALSE if the field can't be found.
*/
function fieldPosition($field) {
if(is_object($field)) $field = $field->getName();
$i = 0;
foreach($this->dataFields() as $child) {
if($child->getName() == $field) return $i;
$i++;
}
return false;
}
}
/**
* A field list designed to store a list of hidden fields. When inserted into a template, only the
* input tags will be included
*
* @package forms
* @subpackage fields-structural
*/
class HiddenFieldList extends FieldList {
function forTemplate() {
$output = "";
foreach($this as $field) {
$output .= $field->Field();
}
return $output;
}
}
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