silverstripe-tagfield/src/StringTagField.php

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<?php
namespace SilverStripe\TagField;
use Iterator;
use SilverStripe\Control\Controller;
use SilverStripe\Control\HTTPRequest;
use SilverStripe\Control\HTTPResponse;
use SilverStripe\Forms\DropdownField;
use SilverStripe\Forms\Validator;
use SilverStripe\ORM\ArrayList;
use SilverStripe\ORM\DataObject;
use SilverStripe\ORM\DataObjectInterface;
use SilverStripe\ORM\SS_List;
use SilverStripe\View\ArrayData;
use SilverStripe\View\Requirements;
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/**
* 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 tagfield
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* @subpackage fields
*/
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class StringTagField extends DropdownField
{
/**
* @var array
*/
private static $allowed_actions = [
'suggest',
];
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/**
* @var bool
*/
protected $shouldLazyLoad = false;
/**
* @var int
*/
protected $lazyLoadItemLimit = 10;
/**
* @var bool
*/
protected $canCreate = true;
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/**
* @var null|DataObject
*/
protected $record;
/**
* @var bool
*/
protected $isMultiple = true;
protected $schemaComponent = 'TagField';
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/**
* @return bool
*/
public function getShouldLazyLoad()
{
return $this->shouldLazyLoad;
}
/**
* @param bool $shouldLazyLoad
* @return $this
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*/
public function setShouldLazyLoad($shouldLazyLoad)
{
$this->shouldLazyLoad = $shouldLazyLoad;
return $this;
}
/**
* @return int
*/
public function getLazyLoadItemLimit()
{
return $this->lazyLoadItemLimit;
}
/**
* @param int $lazyLoadItemLimit
* @return $this
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*/
public function setLazyLoadItemLimit($lazyLoadItemLimit)
{
$this->lazyLoadItemLimit = $lazyLoadItemLimit;
return $this;
}
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/**
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* @return bool
*/
public function getIsMultiple()
{
return $this->isMultiple;
}
/**
* @param bool $isMultiple
* @return $this
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*/
public function setIsMultiple($isMultiple)
{
$this->isMultiple = $isMultiple;
return $this;
}
/**
* @return null|DataObject
*/
public function getRecord()
{
if ($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 $this;
}
public function Field($properties = [])
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{
$this->addExtraClass('ss-tag-field entwine');
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return $this
->customise($properties)
->renderWith(TagField::class);
}
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/**
* Provide TagField data to the JSON schema for the frontend component
*
* @return array
*/
public function getSchemaDataDefaults()
{
$schema = array_merge(
parent::getSchemaDataDefaults(),
[
'name' => $this->getName() . '[]',
'lazyLoad' => $this->getShouldLazyLoad(),
'creatable' => $this->getCanCreate(),
'multi' => $this->getIsMultiple(),
'value' => $this->formatOptions($this->Value()),
'disabled' => $this->isDisabled() || $this->isReadonly(),
]
);
if (!$this->getShouldLazyLoad()) {
$schema['options'] = $this->getOptions()->toNestedArray();
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} else {
$schema['optionUrl'] = $this->getSuggestURL();
}
return $schema;
}
protected function formatOptions($fieldValue)
{
if (empty($fieldValue)) {
return [];
}
$formattedValue = [];
foreach ($fieldValue as $value) {
$formattedValue[] = [
'Title' => $value,
'Value' => $value,
];
}
return $formattedValue;
}
/**
* When not used in a React form factory context, this adds the schema data to SilverStripe template
* rendered attributes lists
*
* @return array
*/
public function getAttributes()
{
$attributes = parent::getAttributes();
$attributes['data-schema'] = json_encode($this->getSchemaData());
return $attributes;
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}
/**
* @return string
*/
protected function getSuggestURL()
{
return Controller::join_links($this->Link(), 'suggest');
}
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/**
* @return ArrayList
*/
protected function getOptions()
{
$options = ArrayList::create();
$source = $this->getSource();
if ($source instanceof Iterator) {
$source = iterator_to_array($source);
}
foreach ($source as $value) {
$options->push(
ArrayData::create([
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'Title' => $value,
'Value' => $value,
])
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);
}
return $options;
}
public function setValue($value, $source = null)
{
if (is_string($value)) {
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$value = explode(',', $value ?? '');
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}
if ($source instanceof DataObject) {
$name = $this->getName();
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$value = explode(',', $source->$name ?? '');
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}
if ($source instanceof SS_List) {
$value = $source->column('ID');
}
if ($value === null) {
$value = [];
}
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return parent::setValue(array_filter($value ?? []));
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}
public function saveInto(DataObjectInterface $record)
{
parent::saveInto($record);
$name = $this->getName();
$record->$name = $this->dataValue();
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}
/**
* Ensure that arrays are imploded before being saved
*
* @return mixed|string
*/
public function dataValue()
{
return implode(',', $this->value);
}
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/**
* Returns a JSON string of tags, for lazy loading.
*
* @param HTTPRequest $request
* @return HTTPResponse
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*/
public function suggest(HTTPRequest $request)
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{
$responseBody = json_encode(
['items' => $this->getTags($request->getVar('term'))]
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);
$response = HTTPResponse::create();
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$response->addHeader('Content-Type', 'application/json');
$response->setBody($responseBody);
return $response;
}
/**
* Get or create tag with the given value
*
* @param string $term
* @return DataObject|bool
*/
protected function getOrCreateTag($term)
{
// Check if existing record can be found
$source = $this->getSourceList();
if (!$source) {
return false;
}
$titleField = $this->getTitleField();
$record = $source
->filter($titleField, $term)
->first();
if ($record) {
return $record;
}
// Create new instance if not yet saved
if ($this->getCanCreate()) {
$dataClass = $source->dataClass();
$record = Injector::inst()->create($dataClass);
if (is_array($term)) {
$term = $term['Value'];
}
$record->{$titleField} = $term;
$record->write();
if ($source instanceof SS_List) {
$source->add($record);
}
return $record;
}
return false;
}
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/**
* Returns array of arrays representing tags that partially match the given search term
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*
* @param string $term
* @return array
*/
protected function getTags($term)
{
$items = [];
foreach ($this->getOptions() as $i => $tag) {
/** @var ArrayData $tag */
$tagValue = $tag->Value;
// Map into a distinct list (prevent duplicates)
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if (stripos($tagValue ?? '', $term ?? '') !== false && !array_key_exists($tagValue, $items ?? [])) {
$items[$tagValue] = [
'id' => $tag->Title,
'text' => $tag->Value,
];
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}
}
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return array_slice(array_values($items ?? []), 0, $this->getLazyLoadItemLimit());
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}
/**
* 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 $this->extendValidationResult(true, $validator);
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}
/**
* @return bool
*/
public function getCanCreate()
{
return $this->canCreate;
}
/**
* @param bool $canCreate
* @return $this
*/
public function setCanCreate($canCreate)
{
$this->canCreate = $canCreate;
return $this;
}
public function performReadonlyTransformation()
{
$field = parent::performReadonlyTransformation();
$field->setValue(implode(', ', $this->Value()));
return $field;
}
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}