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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright  Copyright (c) Flipbox Digital Limited  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license    https://github.com/flipboxfactory/craft-element-lists/LICENSE  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @link       https://github.com/flipboxfactory/craft-element-lists/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace flipbox\craft\element\lists\fields;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Craft;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use craft\base\Element;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use craft\base\ElementInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use craft\events\FieldElementEvent;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use flipbox\craft\element\lists\relationships\RelationshipInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Flipbox Factory <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @since 2.0.0  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @property string $settingsTemplate  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                trait ElementListTrait  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use ModifyElementQueryTrait,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        NormalizeValueTrait,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        InputTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $ignoreSearchKeywords = true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @inheritdoc  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getSearchKeywords($value, ElementInterface $element): string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($this->ignoreSearchKeywords === true) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return '';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return parent::getSearchKeywords($value, $element);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Identify whether a sort order should be enforced.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function ensureSortOrder(): bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->sortable;  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Allow the settings to identify whether the element should be sortable  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param bool $sortable  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return $this  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function setSortable(bool $sortable = null)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->sortable = $sortable === true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get the sortable attribute value  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getSortable(): bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->sortable;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @inheritDoc  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @throws \Twig\Error\LoaderError  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @throws \Twig\Error\RuntimeError  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @throws \Twig\Error\SyntaxError  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getSettingsHtml()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return Craft::$app->getView()->renderTemplate(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'element-lists/_components/fieldtypes/settings',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'settingsTemplate' => $this->settingsTemplate,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'field' => $this,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Our value is not an ElementQueryInterface and therefore we should handle it  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * differently.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @inheritdoc  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                        
            
                                    
            
            
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                    public function afterElementSave(ElementInterface $element, bool $isNew)  | 
            
            
                                                        
            
                                    
            
            
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                    { | 
            
            
                                                        
            
                                    
            
            
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                        // Skip if the element is just propagating, and we're not localizing relations  | 
            
            
                                                        
            
                                    
            
            
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                        /** @var Element $element */  | 
            
            
                                                        
            
                                    
            
            
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                        if (!$element->propagating || $this->localizeRelations) { | 
            
                            
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                            /** @var RelationshipInterface $value */  | 
            
            
                                                        
            
                                    
            
            
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                            $value = $element->getFieldValue($this->handle);  | 
            
            
                                                        
            
                                    
            
            
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                            if ($value->isMutated()) { | 
            
            
                                                        
            
                                    
            
            
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                                $value->save();  | 
            
            
                                                        
            
                                    
            
            
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                            }  | 
            
            
                                                        
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                        // Trigger an 'afterElementSave' event  | 
            
            
                                                        
            
                                    
            
            
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                        if ($this->hasEventHandlers(self::EVENT_AFTER_ELEMENT_SAVE)) { | 
            
                            
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                            $this->trigger(self::EVENT_AFTER_ELEMENT_SAVE, new FieldElementEvent([  | 
            
                            
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                                'element' => $element,  | 
            
            
                                                        
            
                                    
            
            
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                                'isNew' => $isNew,  | 
            
            
                                                        
            
                                    
            
            
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                            ]));  | 
            
            
                                                        
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: