Add class invite system

app/locale/en.coffee

@@ -875,6 +875,10 @@
     play_time: "Play time:"
     completed: "Completed:"
     invite_students: "Invite students to join this class."
+    invite_link_header: "Link to join course"
+    invite_link_p_1: "Give this link to students you would like to have join the course."
+    invite_link_p_2: "Or have us email them directly:"
+    capacity_used: "Course slots used:"
     enter_emails: "Enter student emails to invite, one per line"
     send_invites: "Send Invites"
     title: "Title"

app/styles/courses/course-details.sass

@@ -1,6 +1,6 @@
 #course-details-view
 
-  .invite-emails
+  #invite-emails-textarea
     width: 50%
 
   .progress-cell

app/templates/courses/course-details.jade

@@ -247,18 +247,24 @@ mixin progress-members-popup-started(i, level)
 
 mixin invite-tab
   p(data-i18n="courses.invite_students")
-  // TODO: finalize text here and then i18n it
-  h3 Link to join course
-  p Give this link to students you would like to have join the course.
-  a= document.location.origin + "/account/prepaid?_ppc=" + view.prepaid.get('code')
-  p Or have us email them directly:
-  textarea.invite-emails(rows=3, data-i18n="[placeholder]courses.enter_emails", placeholder="Enter student emails to invite, one per line")
-  div(style='margin-top:10px;')
-    button.btn.btn-success.btn-invite(data-i18n="courses.send_invites")
+  h3(data-i18n="courses.invite_link_header")
+  p(data-i18n="courses.invite_link_p_1")
+  .alert.alert-info
+    strong= document.location.origin + "/account/prepaid?_ppc=" + view.prepaid.get('code')
+  p(data-i18n="courses.invite_link_p_2")
+  .form
+    .form-group
+      textarea#invite-emails-textarea.form-control(
+        rows=3, data-i18n="[placeholder]courses.enter_emails", placeholder="Enter student emails to invite, one per line")
+    .form-group
+      button#invite-btn.btn.btn-success(data-i18n="courses.send_invites")
+      #invite-emails-sending-alert.alert.alert-info.hide(data-i18n="common.sending")
+      #invite-emails-success-alert.alert.alert-success.hide(data-i18n="play_level.done")
+
   h3 Class Capacity
   if view.prepaid.loaded
     p
-      span.spr Course slots used:
+      span.spr(data-i18n="courses.capacity_used")
       span #{view.prepaid.get('redeemers').length} / #{view.prepaid.get('maxRedeemers')}.
 
 mixin levels-tab

app/views/courses/CourseDetailsView.coffee

@@ -23,7 +23,7 @@ module.exports = class CourseDetailsView extends RootView
     'click .progress-level-cell': 'onClickProgressLevelCell'
     'mouseenter .progress-level-cell': 'onMouseEnterPoint'
     'mouseleave .progress-level-cell': 'onMouseLeavePoint'
-    'click .btn-invite': 'onClickButtonInvite'
+    'click #invite-btn': 'onClickInviteButton'
 
   constructor: (options, @courseID, @courseInstanceID) ->
     super options
@@ -123,11 +123,7 @@ module.exports = class CourseDetailsView extends RootView
     @members = new CocoCollection([], { url: "/db/course_instance/#{@courseInstance.id}/members", model: User, comparator: 'nameLower' })
     @listenToOnce @members, 'sync', @onMembersSync
     @supermodel.loadCollection @members, 'members', cache: false
-    if @adminMode
-      prepaidID = @course.get('prepaidID')
-      if not prepaidID
-        prepaidID = '560ef835444e5c9a847e0218'
-      # TODO: Just abort if no prepaidID
+    if @adminMode and prepaidID = @courseInstance.get('prepaidID')
       @prepaid = @supermodel.getModel(Prepaid, prepaidID) or new Prepaid _id: prepaidID
       @listenTo @prepaid, 'sync', @onPrepaidSync
       if @prepaid.loaded
@@ -244,8 +240,25 @@ module.exports = class CourseDetailsView extends RootView
       viewArgs: [{}, levelSlug]
     }
 
-  onClickButtonInvite: (e) ->
+  onClickInviteButton: (e) ->
+    emails = @$('#invite-emails-textarea').val()
+    emails = emails.split('\n')
+    emails = _.filter((_.string.trim(email) for email in emails))
+    if not emails.length
+      return
+    url = @courseInstance.url() + '/invite_students'
+    @$('#invite-btn, #invite-emails-textarea').addClass('hide')
+    @$('#invite-emails-sending-alert').removeClass('hide')
 
+    $.ajax({
+      url: url
+      data: {emails: emails}
+      method: 'POST'
+      context: @
+      success: ->
+        @$('#invite-emails-sending-alert').addClass('hide')
+        @$('#invite-emails-success-alert').removeClass('hide')
+    })
 
   onMouseEnterPoint: (e) ->
     $('.progress-popup-container').hide()

server/courses/course_instance_handler.coffee

@@ -9,6 +9,7 @@ PrepaidHandler = require '../prepaids/prepaid_handler'
 User = require '../users/User'
 UserHandler = require '../users/user_handler'
 utils = require '../../app/core/utils'
+sendwithus = require '../sendwithus'
 
 CourseInstanceHandler = class CourseInstanceHandler extends Handler
   modelClass: CourseInstance
@@ -31,6 +32,7 @@ CourseInstanceHandler = class CourseInstanceHandler extends Handler
     return @createAPI(req, res) if relationship is 'create'
     return @getLevelSessionsAPI(req, res, args[0]) if args[1] is 'level_sessions'
     return @getMembersAPI(req, res, args[0]) if args[1] is 'members'
+    return @inviteStudents(req, res, args[0]) if relationship is 'invite_students'
     super arguments...
 
   createAPI: (req, res) ->
@@ -101,4 +103,28 @@ CourseInstanceHandler = class CourseInstanceHandler extends Handler
         cleandocs = (UserHandler.formatEntity(req, doc) for doc in users)
         @sendSuccess(res, cleandocs)
 
+  inviteStudents: (req, res, courseInstanceID) ->
+    if not req.body.emails
+      return @sendBadInputError(res, 'Emails not included')
+    CourseInstance.findById courseInstanceID, (err, courseInstance) =>
+      return @sendDatabaseError(res, err) if err
+      return @sendNotFoundError(res) unless courseInstance
+      return @sendForbiddenError(res) unless @hasAccessToDocument(req, courseInstance)
+
+      Prepaid.findById courseInstance.get('prepaidID'), (err, prepaid) =>
+        return @sendDatabaseError(res, err) if err
+        return @sendNotFoundError(res) unless prepaid
+        return @sendForbiddenError(res) unless prepaid.get('maxRedeemers') > prepaid.get('redeemers').length
+        for email in req.body.emails
+          context =
+            email_id: sendwithus.templates.course_invite_email
+            recipient:
+              address: email
+            email_data:
+              class_name: courseInstance.get('name')
+              join_link: "https://codecombat.com/account/prepaid?_ppc=" + prepaid.get('code')
+          sendwithus.api.send context, _.noop
+        return @sendSuccess(res, {})
+
+
 module.exports = new CourseInstanceHandler()

server/sendwithus.coffee

@@ -22,3 +22,5 @@ module.exports.templates =
   generic_email: 'tem_JhRnQ4pvTS4KdQjYoZdbei'
   plain_text_email: 'tem_85UvKDCCNPXsFckERTig6Y'
   next_steps_email: 'tem_RDHhTG5inXQi8pthyqWr5D'
+  course_invite_email: 'tem_u6D2EFWYC5Ptk38bSykjsU'
+

test/server/functional/course_instance.spec.coffee

@@ -196,3 +196,25 @@ describe 'CourseInstance', ->
                     expect(prepaid.get('maxRedeemers')).toEqual(50)
                     expect(prepaid.get('properties')?.courseIDs?.length).toEqual(courses.length)
                     done()
+
+  describe 'Invite to course', ->
+    it 'takes a list of emails and sends invites', (done) ->
+      stripe.tokens.create {
+        card: { number: '4242424242424242', exp_month: 12, exp_year: 2020, cvc: '123' }
+      }, (err, token) ->
+        loginNewUser (user1) ->
+          createCourse 0, (err, course) ->
+            expect(err).toBeNull()
+            return done(err) if err
+            createCourseInstances user1, course.get('_id'), 1, token.id, (err, courseInstances) ->
+              expect(err).toBeNull()
+              return done(err) if err
+              expect(courseInstances.length).toEqual(1)
+              inviteStudentsURL = getURL("/db/course_instance/#{courseInstances[0]._id}/invite_students")
+              requestBody = {
+                emails: ['test@test.com']
+              }
+              request.post { uri: inviteStudentsURL, json: requestBody }, (err, res) ->
+                expect(err).toBeNull()
+                expect(res.statusCode).toBe(200)
+                done()