1 files changed, 144 insertions, 0 deletions
diff --git a/lib/cache/cachestorage.js b/lib/cache/cachestorage.js
new file mode 100644
index 0000000..7e7f0cf
--- /dev/null
+++ b/lib/cache/cachestorage.js
@@ -0,0 +1,144 @@
+'use strict'
+
+const { kConstruct } = require('./symbols')
+const { Cache } = require('./cache')
+const { webidl } = require('../fetch/webidl')
+const { kEnumerableProperty } = require('../core/util')
+
+class CacheStorage {
+  /**
+   * @see https://w3c.github.io/ServiceWorker/#dfn-relevant-name-to-cache-map
+   * @type {Map<string, import('./cache').requestResponseList}
+   */
+  #caches = new Map()
+
+  constructor () {
+    if (arguments[0] !== kConstruct) {
+      webidl.illegalConstructor()
+    }
+  }
+
+  async match (request, options = {}) {
+    webidl.brandCheck(this, CacheStorage)
+    webidl.argumentLengthCheck(arguments, 1, { header: 'CacheStorage.match' })
+
+    request = webidl.converters.RequestInfo(request)
+    options = webidl.converters.MultiCacheQueryOptions(options)
+
+    // 1.
+    if (options.cacheName != null) {
+      // 1.1.1.1
+      if (this.#caches.has(options.cacheName)) {
+        // 1.1.1.1.1
+        const cacheList = this.#caches.get(options.cacheName)
+        const cache = new Cache(kConstruct, cacheList)
+
+        return await cache.match(request, options)
+      }
+    } else { // 2.
+      // 2.2
+      for (const cacheList of this.#caches.values()) {
+        const cache = new Cache(kConstruct, cacheList)
+
+        // 2.2.1.2
+        const response = await cache.match(request, options)
+
+        if (response !== undefined) {
+          return response
+        }
+      }
+    }
+  }
+
+  /**
+   * @see https://w3c.github.io/ServiceWorker/#cache-storage-has
+   * @param {string} cacheName
+   * @returns {Promise<boolean>}
+   */
+  async has (cacheName) {
+    webidl.brandCheck(this, CacheStorage)
+    webidl.argumentLengthCheck(arguments, 1, { header: 'CacheStorage.has' })
+
+    cacheName = webidl.converters.DOMString(cacheName)
+
+    // 2.1.1
+    // 2.2
+    return this.#caches.has(cacheName)
+  }
+
+  /**
+   * @see https://w3c.github.io/ServiceWorker/#dom-cachestorage-open
+   * @param {string} cacheName
+   * @returns {Promise<Cache>}
+   */
+  async open (cacheName) {
+    webidl.brandCheck(this, CacheStorage)
+    webidl.argumentLengthCheck(arguments, 1, { header: 'CacheStorage.open' })
+
+    cacheName = webidl.converters.DOMString(cacheName)
+
+    // 2.1
+    if (this.#caches.has(cacheName)) {
+      // await caches.open('v1') !== await caches.open('v1')
+
+      // 2.1.1
+      const cache = this.#caches.get(cacheName)
+
+      // 2.1.1.1
+      return new Cache(kConstruct, cache)
+    }
+
+    // 2.2
+    const cache = []
+
+    // 2.3
+    this.#caches.set(cacheName, cache)
+
+    // 2.4
+    return new Cache(kConstruct, cache)
+  }
+
+  /**
+   * @see https://w3c.github.io/ServiceWorker/#cache-storage-delete
+   * @param {string} cacheName
+   * @returns {Promise<boolean>}
+   */
+  async delete (cacheName) {
+    webidl.brandCheck(this, CacheStorage)
+    webidl.argumentLengthCheck(arguments, 1, { header: 'CacheStorage.delete' })
+
+    cacheName = webidl.converters.DOMString(cacheName)
+
+    return this.#caches.delete(cacheName)
+  }
+
+  /**
+   * @see https://w3c.github.io/ServiceWorker/#cache-storage-keys
+   * @returns {string[]}
+   */
+  async keys () {
+    webidl.brandCheck(this, CacheStorage)
+
+    // 2.1
+    const keys = this.#caches.keys()
+
+    // 2.2
+    return [...keys]
+  }
+}
+
+Object.defineProperties(CacheStorage.prototype, {
+  [Symbol.toStringTag]: {
+    value: 'CacheStorage',
+    configurable: true
+  },
+  match: kEnumerableProperty,
+  has: kEnumerableProperty,
+  open: kEnumerableProperty,
+  delete: kEnumerableProperty,
+  keys: kEnumerableProperty
+})
+
+module.exports = {
+  CacheStorage
+}