Issue 5562 - Move Edge storage to IndexedDB

lib/io.js

Index: lib/io.js
===================================================================
--- a/lib/io.js
+++ b/lib/io.js
@@ -28,32 +28,22 @@
 {
   return new Promise((resolve, reject) =>
   {
-    let key = fileToKey(fileName);
-
-    ext.storage.get(key, items =>
+    localforage.getItem(fileToKey(fileName), (err, value) =>
     {
-      let entry = items[key];
-
-      if (entry)
-        resolve(entry);
+      if (err || !value)
+        reject({type: "NoSuchFile"});
       else
-        reject({type: "NoSuchFile"});
+        resolve(value);
     });
   });
 }
 
 function saveFile(fileName, data)
 {
-  return new Promise((resolve, reject) =>
-  {
-    ext.storage.set(
-      fileToKey(fileName),
-      {
-        content: Array.from(data),
-        lastModified: Date.now()
-      },
-      resolve
-    );
+  let key = fileToKey(fileName);
+  return localforage.setItem(key, {
+    content: Array.from(data),
+    lastModified: Date.now()
   });
 }
 
@@ -86,8 +76,11 @@
   {
     return loadFile(fileName).then(entry =>
     {
-      for (let line of entry.content)
-        listener(line);
+      if ("content" in entry)
+      {
+        for (let line of entry.content)
+          listener(line);
+      }
     });
   },
 
@@ -133,16 +126,7 @@
   {
     return loadFile(fromFile).then(entry =>
     {
-      return new Promise((resolve, reject) =>
-      {
-        ext.storage.set(fileToKey(newName), entry, () =>
-        {
-          if (chrome.runtime.lastError)
-            reject(chrome.runtime.lastError.message);
-          else
-            resolve();
-        });
-      });
+      return saveFile(fileToKey(newName), entry);
     }).then(() => removeFile(fromFile));
   },