MOBILE-3254 ionic: double click on item some time make it open twice

Author: Kiet Ly Chan

src/components/ion-tabs/ion-tab.ts

@@ -16,9 +16,10 @@ import {
     Component, Optional, ElementRef, NgZone, Renderer, ComponentFactoryResolver, ChangeDetectorRef, ErrorHandler, OnInit,
     OnDestroy, ViewEncapsulation
 } from '@angular/core';
-import { Tab, App, Config, Platform, GestureController, DeepLinker, DomController } from 'ionic-angular';
+import { Tab, App, Config, Platform, GestureController, DeepLinker, DomController, NavOptions } from 'ionic-angular';
 import { TransitionController } from 'ionic-angular/transitions/transition-controller';
 import { CoreIonTabsComponent } from './ion-tabs';
+import { TransitionDoneFn } from 'ionic-angular/navigation/nav-util';
 
 /**
  * Equivalent to ion-tab, but to be used inside core-ion-tabs.
@@ -58,4 +59,35 @@ export class CoreIonTabComponent extends Tab implements OnInit, OnDestroy {
 
         this.parent.remove(this);
     }
+
+    /**
+     * Push a page to the navigation stack. this similar to parent NavController, but perform some check to make
+     * sure one page won't open multiple time.
+     */
+    push(page: any, params?: any, opts?: NavOptions, done?: TransitionDoneFn): Promise<any> {
+        if (this.isTransitioning()) {
+            // Try again later, the app is transitioning, this also happen when the page is first loaded.
+            return new Promise<any>((resolve, reject): void => {
+                setTimeout(() => {
+
+                    return this.push(page, params, opts, done).then(resolve, reject);
+                }, 250);
+            });
+        } else {
+            const previousViews = this.getViews();
+            if (previousViews.length > 0) {
+                const previousView = previousViews[previousViews.length - 1];
+                const previousParam = previousView.getNavParams().data;
+
+                // If the view we pushing in have same page's name and identical params, then we won't do anything.
+                // This is Ionic issue when user clicking too fast on old device or slow internet connection.
+                if (previousView.name === page && JSON.stringify(previousParam) === JSON.stringify(params)) {
+
+                    return Promise.resolve();
+                }
+            }
+
+            return super.push(page, params, opts, done);
+        }
+    }
 }