508 lines
12 KiB
PHP
508 lines
12 KiB
PHP
<?php
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namespace SilverStripe\TagField;
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use SilverStripe\Control\Controller;
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use SilverStripe\Control\HTTPRequest;
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use SilverStripe\Control\HTTPResponse;
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use SilverStripe\Core\Convert;
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use SilverStripe\Core\Injector\Injector;
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use SilverStripe\Forms\MultiSelectField;
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use SilverStripe\Forms\Validator;
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use SilverStripe\ORM\ArrayList;
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use SilverStripe\ORM\DataList;
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use SilverStripe\ORM\DataObject;
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use SilverStripe\ORM\DataObjectInterface;
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use SilverStripe\View\ArrayData;
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/**
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* Provides a tagging interface, storing links between tag DataObjects and a parent DataObject.
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*
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* @package forms
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* @subpackage fields
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*/
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class TagField extends MultiSelectField
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{
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/**
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* @var array
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*/
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private static $allowed_actions = [
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'suggest',
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];
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/**
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* @var bool
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*/
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protected $shouldLazyLoad = false;
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/**
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* @var int
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*/
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protected $lazyLoadItemLimit = 10;
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/**
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* @var bool
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*/
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protected $canCreate = true;
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/**
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* @var string
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*/
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protected $titleField = 'Title';
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/**
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* @var DataList
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*/
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protected $sourceList;
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/**
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* @var bool
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*/
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protected $isMultiple = true;
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/** @skipUpgrade */
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protected $schemaComponent = 'TagField';
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/**
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* @param string $name
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* @param string $title
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* @param null|DataList $source
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* @param null|DataList $value
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* @param string $titleField
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*/
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public function __construct($name, $title = '', $source = [], $value = null, $titleField = 'Title')
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{
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$this->setSourceList($source);
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$this->setTitleField($titleField);
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parent::__construct($name, $title, $source, $value);
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$this->addExtraClass('ss-tag-field');
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}
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/**
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* @return bool
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*/
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public function getShouldLazyLoad()
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{
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return $this->shouldLazyLoad;
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}
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/**
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* @param bool $shouldLazyLoad
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*
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* @return static
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*/
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public function setShouldLazyLoad($shouldLazyLoad)
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{
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$this->shouldLazyLoad = $shouldLazyLoad;
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return $this;
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}
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/**
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* @return int
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*/
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public function getLazyLoadItemLimit()
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{
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return $this->lazyLoadItemLimit;
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}
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/**
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* @param int $lazyLoadItemLimit
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*
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* @return static
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*/
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public function setLazyLoadItemLimit($lazyLoadItemLimit)
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{
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$this->lazyLoadItemLimit = $lazyLoadItemLimit;
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return $this;
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}
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/**
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* @return bool
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*/
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public function getIsMultiple()
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{
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return $this->isMultiple;
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}
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/**
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* @param bool $isMultiple
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*
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* @return static
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*/
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public function setIsMultiple($isMultiple)
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{
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$this->isMultiple = $isMultiple;
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return $this;
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}
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/**
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* @return bool
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*/
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public function getCanCreate()
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{
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return $this->canCreate;
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}
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/**
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* @param bool $canCreate
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*
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* @return static
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*/
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public function setCanCreate($canCreate)
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{
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$this->canCreate = $canCreate;
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return $this;
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}
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/**
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* @return string
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*/
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public function getTitleField()
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{
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return $this->titleField;
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}
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/**
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* @param string $titleField
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*
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* @return $this
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*/
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public function setTitleField($titleField)
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{
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$this->titleField = $titleField;
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return $this;
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}
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/**
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* Get the DataList source. The 4.x upgrade for SelectField::setSource starts to convert this to an array
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* @return DataList
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*/
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public function getSourceList()
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{
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return $this->sourceList;
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}
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/**
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* Set the model class name for tags
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* @param DataList $className
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* @return self
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*/
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public function setSourceList($sourceList)
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{
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$this->sourceList = $sourceList;
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return $this;
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}
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/**
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* {@inheritdoc}
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*/
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public function Field($properties = [])
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{
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$this->addExtraClass('entwine');
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return $this->customise($properties)->renderWith(self::class);
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}
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/**
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* Provide TagField data to the JSON schema for the frontend component
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*
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* @return array
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*/
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public function getSchemaDataDefaults()
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{
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$options = $this->getOptions(true);
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$schema = array_merge(
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parent::getSchemaDataDefaults(),
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[
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'name' => $this->getName() . '[]',
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'lazyLoad' => $this->getShouldLazyLoad(),
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'creatable' => $this->getCanCreate(),
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'multi' => $this->getIsMultiple(),
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'value' => $options->count() ? $options->toNestedArray() : null,
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'disabled' => $this->isDisabled() || $this->isReadonly(),
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]
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);
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if (!$this->getShouldLazyLoad()) {
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$schema['options'] = array_values($this->getOptions()->toNestedArray());
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} else {
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$schema['optionUrl'] = $this->getSuggestURL();
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}
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$this->setAttribute('data-schema', json_encode($schema));
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return $schema;
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}
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/**
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* @return string
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*/
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protected function getSuggestURL()
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{
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return Controller::join_links($this->Link(), 'suggest');
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}
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/**
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* @return ArrayList
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*/
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protected function getOptions($onlySelected = false)
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{
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$options = ArrayList::create();
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$source = $this->getSourceList();
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// No source means we have no options
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if (!$source) {
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return ArrayList::create();
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}
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$dataClass = $source->dataClass();
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$values = $this->Value();
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// If we have no values and we only want selected options we can bail here
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if (empty($values) && $onlySelected) {
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return ArrayList::create();
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}
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// Convert an array of values into a datalist of options
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if (is_array($values) && !empty($values)) {
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$values = DataList::create($dataClass)
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->filter($this->getTitleField(), $values);
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} else {
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$values = ArrayList::create();
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}
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// Prep a function to parse a dataobject into an option
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$addOption = function (DataObject $item) use ($options, $values) {
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$titleField = $this->getTitleField();
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$options->push(ArrayData::create([
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'Title' => $item->$titleField,
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'Value' => $item->ID,
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'Selected' => (bool) $values->find('ID', $item->ID)
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]));
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};
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// Only parse the values if we only want the selected items in the values list (this is for lazy-loading)
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if ($onlySelected) {
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$values->each($addOption);
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return $options;
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}
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$source->each($addOption);
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return $options;
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}
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/**
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* {@inheritdoc}
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*/
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public function setValue($value, $source = null)
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{
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if ($source instanceof DataObject) {
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$name = $this->getName();
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if ($source->hasMethod($name)) {
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$value = $source->$name()->column($this->getTitleField());
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}
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}
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if (!is_array($value)) {
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return parent::setValue($value);
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}
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return parent::setValue(array_filter($value));
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}
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/**
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* {@inheritdoc}
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*/
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public function getAttributes()
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{
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return array_merge(
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parent::getAttributes(),
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[
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'name' => $this->getName() . '[]',
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'style' => 'width: 100%',
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'data-schema' => json_encode($this->getSchemaData()),
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]
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);
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}
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/**
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* {@inheritdoc}
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*/
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public function saveInto(DataObjectInterface $record)
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{
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$name = $this->getName();
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$titleField = $this->getTitleField();
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$values = $this->Value();
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$relation = $record->$name();
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$ids = [];
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if (!$values) {
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$values = [];
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}
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if (empty($record) || empty($titleField)) {
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return;
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}
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if (!$record->hasMethod($name)) {
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throw new Exception(
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sprintf("%s does not have a %s method", get_class($record), $name)
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);
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}
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foreach ($values as $key => $value) {
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// Get or create record
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$record = $this->getOrCreateTag($value);
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if ($record) {
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$ids[] = $record->ID;
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$values[$key] = $record->Title;
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}
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}
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$relation->setByIDList(array_filter($ids));
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}
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/**
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* Get or create tag with the given value
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*
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* @param string $term
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* @return DataObject|bool
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*/
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protected function getOrCreateTag($term)
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{
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// Check if existing record can be found
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$source = $this->getSourceList();
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$titleField = $this->getTitleField();
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$record = $source
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->filter($titleField, $term)
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->first();
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if ($record) {
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return $record;
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}
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// Create new instance if not yet saved
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if ($this->getCanCreate()) {
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$dataClass = $source->dataClass();
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$record = Injector::inst()->create($dataClass);
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if (is_array($term)) {
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$term = $term['Value'];
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}
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$record->{$titleField} = $term;
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$record->write();
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if ($source instanceof SS_List) {
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$source->add($record);
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}
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return $record;
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}
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return false;
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}
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/**
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* Returns a JSON string of tags, for lazy loading.
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*
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* @param HTTPRequest $request
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* @return HTTPResponse
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*/
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public function suggest(HTTPRequest $request)
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{
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$tags = $this->getTags($request->getVar('term'));
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$response = HTTPResponse::create();
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$response->addHeader('Content-Type', 'application/json');
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$response->setBody(json_encode(['items' => $tags]));
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return $response;
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}
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/**
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* Returns array of arrays representing tags.
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*
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* @param string $term
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* @return array
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*/
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protected function getTags($term)
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{
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$source = $this->getSourceList();
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$titleField = $this->getTitleField();
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$query = $source
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->filter($titleField . ':PartialMatch:nocase', $term)
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->sort($titleField)
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->limit($this->getLazyLoadItemLimit());
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// Map into a distinct list
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$items = [];
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$titleField = $this->getTitleField();
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foreach ($query->map('ID', $titleField) as $id => $title) {
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$items[$title] = [
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'Title' => $title,
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'Value' => $id,
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];
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}
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return array_values($items);
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}
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/**
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* DropdownField assumes value will be a scalar so we must
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* override validate. This only applies to Silverstripe 3.2+
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*
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* @param Validator $validator
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* @return bool
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*/
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public function validate($validator)
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{
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return true;
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}
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/**
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* Converts the field to a readonly variant.
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*
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* @return ReadonlyTagField
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*/
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public function performReadonlyTransformation()
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{
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/** @var ReadonlyTagField $copy */
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$copy = $this->castedCopy(ReadonlyTagField::class);
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$copy->setSourceList($this->getSourceList());
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return $copy;
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}
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/**
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* Prevent the default, which would return "tag"
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*
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* @return string
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*/
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public function Type()
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{
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return '';
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}
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public function getSchemaStateDefaults()
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{
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$data = parent::getSchemaStateDefaults();
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// Add options to 'data'
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$data['lazyLoad'] = $this->getShouldLazyLoad();
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$data['multi'] = $this->getIsMultiple();
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$data['optionUrl'] = $this->getSuggestURL();
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$data['creatable'] = $this->getCanCreate();
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$options = $this->getOptions(true);
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$data['value'] = $options->count() ? $options->toNestedArray() : null;
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return $data;
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}
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}
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