Refactors most controllers and directives into classes for more organized and maintainable code

app/assets/javascripts/services/sessionHistory.js

@@ -0,0 +1,44 @@
+import { NoteHistoryEntry } from '@/models/noteHistoryEntry';
+import { SFSessionHistoryManager , SFItemHistory } from 'snjs';
+
+export class SessionHistory extends SFSessionHistoryManager {
+  /* @ngInject */
+  constructor(
+    modelManager,
+    storageManager,
+    authManager,
+    passcodeManager,
+    $timeout
+  ) {
+    SFItemHistory.HistoryEntryClassMapping = {
+      "Note" : NoteHistoryEntry
+    }
+
+    // Session History can be encrypted with passcode keys. If it changes, we need to resave session
+    // history with the new keys.
+    passcodeManager.addPasscodeChangeObserver(() => {
+      this.saveToDisk();
+    })
+
+    var keyRequestHandler = async () => {
+      let offline = authManager.offline();
+      let auth_params = offline ? passcodeManager.passcodeAuthParams() : await authManager.getAuthParams();
+      let keys = offline ? passcodeManager.keys() : await authManager.keys();
+
+      return {
+        keys: keys,
+        offline: offline,
+        auth_params: auth_params
+      }
+    }
+
+    var contentTypes = ["Note"];
+    super(
+      modelManager,
+      storageManager,
+      keyRequestHandler,
+      contentTypes,
+      $timeout
+    );
+  }
+}