validate the login form on the client side.

2 files changed, 38 insertions, 8 deletions

diff --git a/app/assets/javascripts/views/auto_view.js.coffee b/app/assets/javascripts/views/auto_view.js.coffee
index c54104fa..6c2c263f 100644
--- a/app/assets/javascripts/views/auto_view.js.coffee
+++ b/app/assets/javascripts/views/auto_view.js.coffee
@@ -24,6 +24,13 @@ class CakeSide.AutoView extends Backbone.View
     @views[key] ?= []
     @views[key].push(view)
 
-  field: (name) -> $("##{@fieldName(name)}")
-  fieldName: (name) -> "#{@modelKey()}_#{name}"
+  hideErrors: () ->
+    @$(':input').removeClass('is-invalid')
+    @$('.invalid-feedback').html('')
+
+  showError: (field, message) ->
+    @$(field).addClass('is-invalid').siblings('.invalid-feedback').html(message)
+
+  field: (name) -> @$("##{@fieldName(name)}")
+  fieldName: (name) -> "#{@modelKey}_#{name}"
   render: -> @
diff --git a/app/assets/javascripts/views/sessions/login_form.js.coffee b/app/assets/javascripts/views/sessions/login_form.js.coffee
index dcdeb408..d41c0d9c 100644
--- a/app/assets/javascripts/views/sessions/login_form.js.coffee
+++ b/app/assets/javascripts/views/sessions/login_form.js.coffee
@@ -2,14 +2,37 @@
 
 class CakeSide.Views.LoginForm extends CakeSide.AutoView
   @viewName 'login-form'
+  modelKey: "session"
   events:
-    'change #session_username': 'render'
-    'change #session_password': 'render'
+    'keyup #session_username': 'onKeyUp'
+    'keyup #session_password': 'onKeyUp'
+    'submit form': 'onSubmit'
 
   render: ->
-    @$('input[type=submit]').prop('disabled', !@valid())
+    @hideErrors()
+    @$('input[type=submit]').prop('disabled', !@isValid())
+    _.each _.keys(@errors), (key) =>
+      @showError(@field(key), @errors[key])
 
-  valid: ->
-    !_.isEmpty(@field("username").val()) && !_.isEmpty(@field("password").val())
+  isValid: ->
+    _.keys(@errors).length == 0
 
-  modelKey: -> "session"
+  validate: ->
+    @errors = {}
+    if _.isEmpty(@field("username").val())
+      @errors['username'] = "Email is required"
+
+    if _.isEmpty(@field("password").val())
+      @errors['password'] = "Password is required"
+
+  onKeyUp: (event) ->
+    @validate()
+    @render()
+
+  onSubmit: (event) ->
+    console.log("SUBMITTED")
+    @validate()
+    if !@isValid()
+      event.preventDefault()
+      event.stopPropagation()
+    @render()