silverstripe-tagfield/code/StringTagField.php

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<?php
/**
* Provides a tagging interface, storing comma-delimited tags in a DataObject string field.
*
* This is intended bridge the gap between 1.x and 2.x, and when possible TagField should be used
* instead.
*
* @package forms
* @subpackage fields
*/
class StringTagField extends DropdownField {
/**
* @var array
*/
public static $allowed_actions = array(
'suggest',
);
/**
* @var bool
*/
protected $shouldLazyLoad = false;
/**
* @var int
*/
protected $lazyLoadItemLimit = 10;
/**
* @var null|DataObject
*/
protected $record;
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/**
* @var bool
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*/
protected $isMultiple = true;
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/**
* @param string $name
* @param string $title
* @param array|SS_List $source
* @param array|SS_List $value
*/
public function __construct($name, $title = '', $source = array(), $value = array()) {
parent::__construct($name, $title, $source, $value);
}
/**
* @return bool
*/
public function getShouldLazyLoad() {
return $this->shouldLazyLoad;
}
/**
* @param bool $shouldLazyLoad
*
* @return static
*/
public function setShouldLazyLoad($shouldLazyLoad) {
$this->shouldLazyLoad = $shouldLazyLoad;
return $this;
}
/**
* @return int
*/
public function getLazyLoadItemLimit() {
return $this->lazyLoadItemLimit;
}
/**
* @param int $lazyLoadItemLimit
*
* @return static
*/
public function setLazyLoadItemLimit($lazyLoadItemLimit) {
$this->lazyLoadItemLimit = $lazyLoadItemLimit;
return $this;
}
/**
* @return bool
*/
public function getIsMultiple() {
return $this->isMultiple;
}
/**
* @param bool $isMultiple
*
* @return static
*/
public function setIsMultiple($isMultiple) {
$this->isMultiple = $isMultiple;
return $this;
}
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/**
* @return null|DataObject
*/
public function getRecord() {
if($this->record) {
return $this->record;
}
if($form = $this->getForm()) {
return $form->getRecord();
}
return null;
}
/**
* @param DataObject $record
*
* @return $this
*/
public function setRecord(DataObject $record) {
$this->record = $record;
return $this;
}
/**
* {@inheritdoc}
*/
public function Field($properties = array()) {
Requirements::css(TAG_FIELD_DIR . '/css/select2.min.css');
Requirements::css(TAG_FIELD_DIR . '/css/TagField.css');
Requirements::javascript(THIRDPARTY_DIR . '/jquery/jquery.js');
Requirements::javascript(THIRDPARTY_DIR . '/jquery-entwine/dist/jquery.entwine-dist.js');
Requirements::javascript(TAG_FIELD_DIR . '/js/select2.js');
Requirements::javascript(TAG_FIELD_DIR . '/js/TagField.js');
$this->addExtraClass('ss-tag-field');
if ($this->getIsMultiple()) {
$this->setAttribute('multiple', 'multiple');
}
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if($this->getShouldLazyLoad()) {
$this->setAttribute('data-ss-tag-field-suggest-url', $this->getSuggestURL());
} else {
$properties = array_merge($properties, array(
'Options' => $this->getOptions()
));
}
return $this
->customise($properties)
->renderWith(array("templates/TagField"));
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}
/**
* @return string
*/
protected function getSuggestURL() {
return Controller::join_links($this->Link(), 'suggest');
}
/**
* @return ArrayList
*/
protected function getOptions() {
$options = ArrayList::create();
$source = $this->getSource();
if($source instanceof Iterator) {
$source = iterator_to_array($source);
}
$values = $this->Value();
foreach($source as $value) {
$options->push(
ArrayData::create(array(
'Title' => $value,
'Value' => $value,
'Selected' => in_array($value, $values),
))
);
}
return $options;
}
/**
* {@inheritdoc}
*/
public function setValue($value, $source = null) {
if(is_string($value)) {
$value = explode(',', $value);
}
if($source instanceof DataObject) {
$name = $this->getName();
$value = explode(',', $source->$name);
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}
if($source instanceof SS_List) {
$value = $source->column('ID');
}
return parent::setValue(array_filter($value));
}
/**
* {@inheritdoc}
*/
public function getAttributes() {
return array_merge(
parent::getAttributes(),
array('name' => $this->getName() . '[]')
);
}
/**
* {@inheritdoc}
*/
public function saveInto(DataObjectInterface $record) {
parent::saveInto($record);
$name = $this->getName();
$record->$name = join(',', $this->Value());
$record->write();
}
/**
* Returns a JSON string of tags, for lazy loading.
*
* @param SS_HTTPRequest $request
*
* @return SS_HTTPResponse
*/
public function suggest(SS_HTTPRequest $request) {
$responseBody = Convert::raw2json(
array('items' => array())
);
$response = new SS_HTTPResponse();
$response->addHeader('Content-Type', 'application/json');
if($record = $this->getRecord()) {
$tags = array();
$term = $request->getVar('term');
if($record->hasField($this->getName())) {
$tags = $this->getTags($term);
}
$responseBody = Convert::raw2json(
array('items' => $tags)
);
}
$response->setBody($responseBody);
return $response;
}
/**
* Returns array of arrays representing tags.
*
* @param string $term
*
* @return array
*/
protected function getTags($term) {
$record = $this->getRecord();
if(!$record) {
return array();
}
$fieldName = $this->getName();
$className = $record->getClassName();
$term = Convert::raw2sql($term);
$query = $className::get()
->filter($fieldName . ':PartialMatch:nocase', $term)
->limit($this->getLazyLoadItemLimit());
$items = array();
foreach($query->column($fieldName) as $tags) {
$tags = explode(',', $tags);
foreach($tags as $i => $tag) {
if(stripos($tag, $term) !== false && !in_array($tag, $items)) {
$items[] = array(
'id' => $tag,
'text' => $tag
);
}
}
}
return $items;
}
/**
* DropdownField assumes value will be a scalar so we must
* override validate. This only applies to Silverstripe 3.2+
*
* @param Validator $validator
* @return bool
*/
public function validate($validator) {
return true;
}
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}