Storage-Info hinzugefügt

src/js/lib/pwa-assets.js

@@ -535,6 +535,44 @@ InitPromise.addPromise(() => {
     // window["soundManagerInstance"]["resumeAllIfNotMuted"] = window["soundManagerInstance"].resumeAllIfNotMuted;
 // });
 
+class StorageManager {
+    static getInstance() {
+        if (Helper.isNull(StorageManager.instance)) {
+            StorageManager.instance = new StorageManager();
+        }
+        return StorageManager.instance;
+    }
+
+    async estimate() {
+        if ('storage' in navigator && 'estimate' in navigator.storage) {
+            // We've got the real thing! Return its response.
+            return navigator.storage.estimate();
+        }
+
+        if ('webkitTemporaryStorage' in navigator &&
+            'queryUsageAndQuota' in navigator.webkitTemporaryStorage) {
+            // Return a promise-based wrapper that will follow the expected interface.
+            return new Promise(function (resolve, reject) {
+                navigator.webkitTemporaryStorage.queryUsageAndQuota(
+                    function (usage, quota) {
+                        resolve({usage: usage, quota: quota});
+                    },
+                    reject
+                );
+            });
+        }
+        // If we can't estimate the values, return a Promise that resolves with NaN.
+        return Promise.resolve({usage: NaN, quota: NaN});
+    }
+
+    canEstimateStorage() {
+        return ('storage' in navigator && 'estimate' in navigator.storage || 'webkitTemporaryStorage' in navigator &&
+            'queryUsageAndQuota' in navigator.webkitTemporaryStorage);
+    }
+}
+
+StorageManager.instance = null;
+
 class TabbedFragment extends Fragment {
     constructor(site) {
         super(site, 'pwaAssets/html/fragment/tabbedFragment.html');
@@ -600,4 +638,4 @@ class TabbedFragment extends Fragment {
     }
 }
 
-export { DelayPromise, InstallManager, Matomo, MatomoShareButton, RotateHelper, ScaleHelper, AudioChain, SoundManager, TabbedFragment };
+export { DelayPromise, InstallManager, Matomo, MatomoShareButton, RotateHelper, ScaleHelper, AudioChain, SoundManager, StorageManager, TabbedFragment };