CategoryCollection.php

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<?php
namespace TYPO3\CMS\Core\Category\Collection;

class CategoryCollection extends \TYPO3\CMS\Core\Collection\AbstractRecordCollection implements \TYPO3\CMS\Core\Collection\EditableCollectionInterface {

    static protected $storageTableName = 'sys_category';

    protected $relationFieldName = 'categories';

    public function __construct($tableName = NULL, $fieldName = NULL) {
        parent::__construct();
        if (!empty($tableName)) {
            $this->setItemTableName($tableName);
        } elseif (empty($this->itemTableName)) {
            throw new \RuntimeException('TYPO3\\CMS\\Core\\Category\\Collection\\CategoryCollection needs a valid itemTableName.', 1341826168);
        }
        if (!empty($fieldName)) {
            $this->setRelationFieldName($fieldName);
        }
    }

    static public function create(array $collectionRecord, $fillItems = FALSE) {
        $collection = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(
            'TYPO3\\CMS\\Core\\Category\\Collection\\CategoryCollection',
            $collectionRecord['table_name'],
            $collectionRecord['field_name']
        );
        $collection->fromArray($collectionRecord);
        if ($fillItems) {
            $collection->loadContents();
        }
        return $collection;
    }

    static public function load($id, $fillItems = FALSE, $tableName = '', $fieldName = '') {
        $collectionRecord = $GLOBALS['TYPO3_DB']->exec_SELECTgetSingleRow(
            '*',
            static::$storageTableName,
            'uid = ' . (int)$id . \TYPO3\CMS\Backend\Utility\BackendUtility::deleteClause(static::$storageTableName)
        );
        $collectionRecord['table_name'] = $tableName;
        $collectionRecord['field_name'] = $fieldName;
        return self::create($collectionRecord, $fillItems);
    }

    protected function getCollectedRecords() {
        $relatedRecords = array();
        // Assemble where clause
        $where = 'AND ' . self::$storageTableName . '.uid = ' . (int)$this->getIdentifier();
        // Add condition on tablenames fields
        $where .= ' AND sys_category_record_mm.tablenames = ' . $this->getDatabaseConnection()->fullQuoteStr(
            $this->getItemTableName(),
            'sys_category_record_mm'
        );
        // Add condition on fieldname field
        $where .= ' AND sys_category_record_mm.fieldname = ' . $this->getDatabaseConnection()->fullQuoteStr(
            $this->getRelationFieldName(),
            'sys_category_record_mm'
        );
        $resource = $this->getDatabaseConnection()->exec_SELECT_mm_query(
            $this->getItemTableName() . '.*',
            self::$storageTableName,
            'sys_category_record_mm',
            $this->getItemTableName(),
            $where
        );
        if ($resource) {
            while ($record = $this->getDatabaseConnection()->sql_fetch_assoc($resource)) {
                $relatedRecords[] = $record;
            }
            $this->getDatabaseConnection()->sql_free_result($resource);
        }
        return $relatedRecords;
    }

    public function loadContents() {
        $entries = $this->getCollectedRecords();
        $this->removeAll();
        foreach ($entries as $entry) {
            $this->add($entry);
        }
    }

    protected function getPersistableDataArray() {
        return array(
            'title' => $this->getTitle(),
            'description' => $this->getDescription(),
            'items' => $this->getItemUidList(TRUE)
        );
    }

    public function add($data) {
        $this->storage->push($data);
    }

    public function addAll(\TYPO3\CMS\Core\Collection\CollectionInterface $other) {
        foreach ($other as $value) {
            $this->add($value);
        }
    }

    public function remove($data) {
        $offset = 0;
        foreach ($this->storage as $value) {
            if ($value == $data) {
                break;
            }
            $offset++;
        }
        $this->storage->offsetUnset($offset);
    }

    public function removeAll() {
        $this->storage = new \SplDoublyLinkedList();
    }

    public function getItems() {
        $itemArray = array();
        foreach ($this->storage as $item) {
            $itemArray[] = $item;
        }
        return $itemArray;
    }

    public function setRelationFieldName($field) {
        $this->relationFieldName = $field;
    }

    public function getRelationFieldName() {
        return $this->relationFieldName;
    }

    static public function getStorageTableName() {
        return self::$storageTableName;
    }

    static public function getStorageItemsField() {
        return self::$storageItemsField;
    }

    protected function getDatabaseConnection() {
        return $GLOBALS['TYPO3_DB'];
    }

}