PWA

node_modules/workbox-precaching/src/utils/PrecacheInstallReportPlugin.ts

@@ -0,0 +1,58 @@
+/*
+  Copyright 2020 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {WorkboxPlugin, WorkboxPluginCallbackParam} from 'workbox-core/types.js';
+
+import '../_version.js';
+
+/**
+ * A plugin, designed to be used with PrecacheController, to determine the
+ * of assets that were updated (or not updated) during the install event.
+ *
+ * @private
+ */
+class PrecacheInstallReportPlugin implements WorkboxPlugin {
+  updatedURLs: string[] = [];
+  notUpdatedURLs: string[] = [];
+
+  handlerWillStart: WorkboxPlugin['handlerWillStart'] = async ({
+    request,
+    state,
+  }: WorkboxPluginCallbackParam['handlerWillStart']) => {
+    // TODO: `state` should never be undefined...
+    if (state) {
+      state.originalRequest = request;
+    }
+  };
+
+  cachedResponseWillBeUsed: WorkboxPlugin['cachedResponseWillBeUsed'] = async ({
+    event,
+    state,
+    cachedResponse,
+  }: WorkboxPluginCallbackParam['cachedResponseWillBeUsed']) => {
+    if (event.type === 'install') {
+      if (
+        state &&
+        state.originalRequest &&
+        state.originalRequest instanceof Request
+      ) {
+        // TODO: `state` should never be undefined...
+        const url = state.originalRequest.url;
+
+        if (cachedResponse) {
+          this.notUpdatedURLs.push(url);
+        } else {
+          this.updatedURLs.push(url);
+        }
+      }
+    }
+    return cachedResponse;
+  };
+}
+
+export {PrecacheInstallReportPlugin};