check cash coupons does not exceed cart amount for events

app/assets/javascripts/controllers/events.coffee.erb

@@ -154,6 +154,7 @@ Application.Controllers.controller "ShowEventController", ["$scope", "$state", "
     tickets: {}
     toReserve: false
     amountTotal : 0
+    totalNoCoupon: 0
     totalSeats: 0
 
   ## Discount coupon to apply to the basket, if any
@@ -400,6 +401,7 @@ Application.Controllers.controller "ShowEventController", ["$scope", "$state", "
       r = mkReservation($scope.ctrl.member, $scope.reserve, $scope.event)
       Price.compute mkRequestParams(r, $scope.coupon.applied), (res) ->
         $scope.reserve.amountTotal = res.price
+        $scope.reserve.totalNoCoupon = res.price_without_coupon
     else
       $scope.reserve.amountTotal = null
 

app/assets/javascripts/directives/coupon.coffee.erb

@@ -4,7 +4,7 @@ Application.Directives.directive 'coupon', [ 'Coupon', 'growl', '_t', (Coupon, g
     scope:
       show: '='
       coupon: '='
-      total: '@'
+      total: '='
       userId: '@'
     templateUrl: '<%= asset_path "shared/_coupon.html" %>'
     link: ($scope, element, attributes) ->
@@ -19,6 +19,11 @@ Application.Directives.directive 'coupon', [ 'Coupon', 'growl', '_t', (Coupon, g
       # Binding for the code inputed (see the attached template)
       $scope.couponCode = null
 
+      # Re-compute if the code can be applied when the total of the cart changes
+      $scope.$watch 'total', (newValue, oldValue) ->
+        if newValue and newValue != oldValue and $scope.couponCode
+          $scope.validateCode()
+
       ##
       # Callback to validate the code
       ##

app/assets/templates/events/show.html.erb

@@ -164,7 +164,7 @@
 
           <button class="btn btn-warning-full rounded btn-block text-sm" ng-click="reserveEvent()" ng-show="event.nb_free_places > 0 && !reserve.toReserve">{{ 'book' | translate }}</button>
 
-          <coupon show="reserve.totalSeats > 0 && ctrl.member" coupon="coupon.applied" user-id="{{ctrl.member.id}}"></coupon>
+          <coupon show="reserve.totalSeats > 0 && ctrl.member" coupon="coupon.applied" total="reserve.totalNoCoupon" user-id="{{ctrl.member.id}}"></coupon>
         </div>
       </div>
 

app/assets/templates/machines/reserve.html.erb

@@ -78,7 +78,7 @@
           <div class="clear"><a class="pull-right m-b-sm text-u-l ng-scope m-r-sm" href="#" ng-click="removeMachineSlot(machineSlot, $event)" ng-if="machineSlot.isValid" translate>{{ 'remove_this_slot' }}</a></div>
         </div>
 
-        <coupon show="machineSlotsValid() && (!plansAreShown || selectedPlan)" coupon="coupon.applied" total="{{totalNoCoupon}}" user-id="{{ctrl.member.id}}"></coupon>
+        <coupon show="machineSlotsValid() && (!plansAreShown || selectedPlan)" coupon="coupon.applied" total="totalNoCoupon" user-id="{{ctrl.member.id}}"></coupon>
 
         <span ng-hide="fablabWithoutPlans">
           <div ng-if="machineSlotsValid() && !ctrl.member.subscribed_plan" ng-show="!plansAreShown">

app/assets/templates/trainings/reserve.html.erb

@@ -82,7 +82,7 @@
           <a class="pull-right m-t-xs text-u-l" href="#" ng-click="removeTraining($event)" ng-if="trainingIsValid" translate>{{ 'remove_this_slot' }}</a>
         </div>
 
-        <coupon show="trainingIsValid && (!plansIsShow || selectedPlan)" coupon="coupon.applied" user-id="{{ctrl.member.id}}" total="{{totalNoCoupon}}"></coupon>
+        <coupon show="trainingIsValid && (!plansIsShow || selectedPlan)" coupon="coupon.applied" user-id="{{ctrl.member.id}}" total="totalNoCoupon"></coupon>
 
         <span ng-hide="fablabWithoutPlans">
           <div ng-if="trainingIsValid && !ctrl.member.subscribed_plan" ng-show="!plansIsShow">

app/controllers/api/coupons_controller.rb

@@ -30,7 +30,8 @@ class API::CouponsController < API::ApiController
         _user_id = params[:user_id]
       end
 
-      status = @coupon.status(_user_id, params[:amount])
+      amount = params[:amount].to_f * 100.0
+      status = @coupon.status(_user_id, amount)
       if status != 'active'
         render json: {status: status}, status: :unprocessable_entity
       else