User app error handling upgrades

app/assets/javascripts/user/app/router.js.coffee

@@ -12,3 +12,4 @@ App.Router.map ->
   @resource 'join_requests'
   @resource 'lists', ->
     @resource 'list', path: ':list_id'
+  @route 'error'

app/assets/javascripts/user/app/routes/application_route.js.coffee.erb

@@ -41,8 +41,47 @@ App.ApplicationRoute = Ember.Route.extend
         Ember.$.post '/user/needs_help.json'
         #Ember.$.post('/user/needs_help.json').then (res) =>
           #@set('list.needs_help', true) # also done by faye
+    error: (error, transition, klass)->
+      message = null
+      if error.status is 404
+        if klass.routeName is 'table'
+          message = t('errors.404.model.message', model: t("models.#{klass.routeName}"), id: transition.state.params.table.table_id)
+        else
+          message = t('errors.404.general.message')
+      @transitionTo('index').then (route)->
+        route.get('controller.controllers.application').set 'notice', message
+
     scanQr: ->
+<% if Rails.env.user_app? %>
+      ar = @
+      scanner = cordova.require("cordova/plugin/BarcodeScanner")
+      scanner.scan (result)->
+        if result.cancelled
+          ar.transitionTo('index')
+          $log
+            action: 'qrscan'
+            result: 'cancel'
+        else
+          table_id_index = result.text.indexOf('s?t=');
+          if table_id_index > -1
+            table_id = result.text.substr(table_id_index + 4);
+            ar.transitionTo 'table', table_id
+          else
+            ar.transitionTo('index').then (route)->
+              route.get('controller.controllers.application').set 'notice',  "we got a barcode: '#{result.text}' but cannot extract a table id"
+            $log
+              action: 'qrscan'
+              error: 'cannot extract table id'
+              info: result.text
+
+      , (error)->
+        $log
+          action: 'qrscan'
+          error: 'scan failed'
+          info: error
+        ar.transitionTo('index').then (route)->
+          route.get('controller.controllers.application').set 'notice',  "scanning failed: #{error}"
+<% else %>
+      # @transitionTo 'table', 'abc'
       @transitionTo 'select_qrcode'
-  events: ->
-    error: (error)->
-      debugger
+<% end %>

app/assets/javascripts/user/app/templates/error.emblem

@@ -0,0 +1,2 @@
+.row: h2=t 'app.error.title'
+.row: p=t 'app.error.body'