1 files changed, 32 insertions, 1 deletions
diff --git a/activePage.ts b/activePage.ts
index 736ddca..9b93908 100644
--- a/activePage.ts
+++ b/activePage.ts
@@ -8,9 +8,40 @@ export class ActivePage {
   public cur_section = null;
   private swipe_pos_x = 0;
   private swipe_pos_y = 0;
+  private app_record = null;
 
-  constructor() {
+  constructor(appName: string) {
     // Swipe event handlers
+    var cur_location = window.location.href;
+    var last_slash = cur_location.lastIndexOf('/');
+    var base_url = cur_location.slice(0, last_slash + 1) + appName + '.webapp';
+    this.app_record = null;
+
+    var chk_inst_req = window.navigator.mozApps.checkInstalled(base_url);
+    chk_inst_req.onsuccess = function(e) {
+      if (!chk_inst_req.result) {
+        var install_but_loc = document.getElementById('installButton');
+        install_but_loc.innerHTML(
+          '<button id="installAction">Install App</button>');
+      }
+      document.getElementById('installAction').addEventListener('click',
+        (evt: TouchEvent) => {
+          var install_req = window.navigator.mozApps.install(base_url);
+          install_req.onsuccess = function() {
+            this.app_record = this.result;
+            console.log('Installed with success!');
+          };
+          install_req.onerror = function() {
+            console.log('I cannot install the app!');
+          };
+        }, false);
+    };
+    chk_inst_req.onerror = function(e) {
+      // Most likely we are not on Firefox or something.
+      console.log('Cannot check whether the app has been installed.');
+    };
+
+
     document.body.addEventListener("dblclick",
       () => {
         console.log("dblclick");