Filtering events log messages

Change-Id: I4a2cba3722f4c3539cef774b8847818b164d5b1d
diff --git a/src/app/core/debug/debug.service.ts b/src/app/core/debug/debug.service.ts
new file mode 100644
index 0000000..3c6c2c8
--- /dev/null
+++ b/src/app/core/debug/debug.service.ts
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {IXosKeyboardShortcutService} from '../services/keyboard-shortcut';
+
+export interface IXosDebugStatus {
+  global: boolean;
+  events: boolean;
+}
+
+export interface IXosDebugService {
+  status: IXosDebugStatus;
+  setupShortcuts(): void;
+  toggleGlobalDebug(): void;
+  toggleEventDebug(): void;
+}
+
+export class XosDebugService implements IXosDebugService {
+
+  static $inject = ['$log', '$rootScope', 'XosKeyboardShortcut'];
+
+  public status: IXosDebugStatus = {
+    global: false,
+    events: false
+  };
+
+  constructor (
+    private $log: ng.ILogService,
+    private $scope: ng.IScope,
+    private XosKeyboardShortcut: IXosKeyboardShortcutService
+  ) {
+    const debug = window.localStorage.getItem('debug');
+    this.status.global = (debug === 'true');
+
+    const debugEvent = window.localStorage.getItem('debug-event');
+    this.status.events = (debugEvent === 'true');
+  }
+
+  public setupShortcuts(): void {
+    this.XosKeyboardShortcut.registerKeyBinding({
+      key: 'D',
+      cb: () => this.toggleGlobalDebug(),
+      description: 'Toggle debug messages in browser console'
+    }, 'global');
+
+    this.XosKeyboardShortcut.registerKeyBinding({
+      key: 'E',
+      cb: () => this.toggleEventDebug(),
+      description: 'Toggle debug messages for WS events in browser console'
+    }, 'global');
+  }
+
+  public toggleGlobalDebug(): void {
+    if (window.localStorage.getItem('debug') === 'true') {
+      this.$log.info(`[XosDebug] Disabling debug`);
+      window.localStorage.setItem('debug', 'false');
+      this.status.global = false;
+    }
+    else {
+      window.localStorage.setItem('debug', 'true');
+      this.$log.info(`[XosDebug] Enabling debug`);
+      this.status.global = true;
+    }
+    this.$scope.$broadcast('xos.debug.status', this.status);
+  }
+
+  public toggleEventDebug(): void {
+    if (window.localStorage.getItem('debug-event') === 'true') {
+      this.$log.info(`[XosDebug] Disabling debug for WS events`);
+      window.localStorage.setItem('debug-event', 'false');
+      this.status.events = false;
+    }
+    else {
+      window.localStorage.setItem('debug-event', 'true');
+      this.$log.info(`[XosDebug] Enabling debug for WS events`);
+      this.status.events = true;
+    }
+    this.$scope.$broadcast('xos.debug.status', this.status);
+  }
+}