Issue #3033200: Use core's MemoryStorage

src/Config/MemoryStorage.php

-<?php
-
-namespace Drupal\config_provider\Config;
-
-use Drupal\Core\Config\StorageInterface;
-
-/**
- * Provides an in memory configuration storage.
- */
-class MemoryStorage implements StorageInterface {
-
-  /**
-   * The configuration, an object shared by reference across collections.
-   *
-   * @var \ArrayAccess
-   */
-  protected $config;
-
-  /**
-   * The storage collection.
-   *
-   * @var string
-   */
-  protected $collection;
-
-  /**
-   * Constructs a new MemoryStorage.
-   *
-   * @param string $collection
-   *   (optional) The collection to store configuration in. Defaults to the
-   *   default collection.
-   */
-  public function __construct($collection = StorageInterface::DEFAULT_COLLECTION) {
-    $this->collection = $collection;
-    $this->config = new \ArrayObject();
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function exists($name) {
-    return isset($this->config[$this->collection][$name]);
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function read($name) {
-    if ($this->exists($name)) {
-      return $this->config[$this->collection][$name];
-    }
-
-    return FALSE;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function readMultiple(array $names) {
-    return array_intersect_key($this->config[$this->collection], array_flip($names));
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function write($name, array $data) {
-    $this->config[$this->collection][$name] = $data;
-    return TRUE;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function delete($name) {
-    if (isset($this->config[$this->collection][$name])) {
-      unset($this->config[$this->collection][$name]);
-      // Remove the collection if it is empty.
-      if (empty($this->config[$this->collection])) {
-        $this->config->offsetUnset($this->collection);
-      }
-      return TRUE;
-    }
-    return FALSE;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function rename($name, $new_name) {
-    if (!$this->exists($name)) {
-      return FALSE;
-    }
-    $this->config[$this->collection][$new_name] = $this->config[$this->collection][$name];
-    unset($this->config[$this->collection][$name]);
-    return TRUE;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function encode($data) {
-    return $data;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function decode($raw) {
-    return $raw;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function listAll($prefix = '') {
-    if (empty($this->config[$this->collection])) {
-      // If the collection is empty no keys are set.
-      return [];
-    }
-    $names = array_keys($this->config[$this->collection]);
-    if ($prefix !== '') {
-      $names = array_filter($names, function ($name) use ($prefix) {
-        return strpos($name, $prefix) === 0;
-      });
-    }
-    return $names;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function deleteAll($prefix = '') {
-    if (!$this->config->offsetExists($this->collection)) {
-      // There's nothing to delete.
-      return FALSE;
-    }
-    if ($prefix === '') {
-      $this->config->offsetUnset($this->collection);
-      return TRUE;
-    }
-    $success = FALSE;
-    foreach (array_keys($this->config[$this->collection]) as $name) {
-      if (strpos($name, $prefix) === 0) {
-        $success = TRUE;
-        unset($this->config[$this->collection][$name]);
-      }
-    }
-    // Remove the collection if it is empty.
-    if (empty($this->config[$this->collection])) {
-      $this->config->offsetUnset($this->collection);
-    }
-
-    return $success;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function createCollection($collection) {
-    $collection = new static($collection);
-    $collection->config = $this->config;
-    return $collection;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getAllCollectionNames() {
-    $collection_names = [];
-    foreach ($this->config as $collection_name => $data) {
-      // Exclude the default collection and empty collections.
-      if ($collection_name !== StorageInterface::DEFAULT_COLLECTION && !empty($data)) {
-        $collection_names[] = $collection_name;
-      }
-    }
-    sort($collection_names);
-
-    return $collection_names;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getCollectionName() {
-    return $this->collection;
-  }
-
-}