FEATURE: redeem Invite when user sign up

app/models/email_token.rb

@@ -57,6 +57,8 @@ class EmailToken < ActiveRecord::Base
         user.save!
       end
     end
+    # redeem invite, if available
+    Invite.redeem_from_email(user.email)
     user
   rescue ActiveRecord::RecordInvalid
     # If the user's email is already taken, just return nil (failure)

app/models/invite.rb

@@ -130,6 +130,14 @@ class Invite < ActiveRecord::Base
     i
   end
 
+  def self.redeem_from_email(email)
+    invite = Invite.find_by(email: Email.downcase(email))
+    if invite
+      InviteRedeemer.new(invite).redeem
+    end
+    invite
+  end
+
   def self.base_directory
     File.join(Rails.root, "public", "csv", RailsMultisite::ConnectionManagement.current_db)
   end

app/models/invite_redeemer.rb

@@ -19,6 +19,10 @@ InviteRedeemer = Struct.new(:invite) do
 
   # extracted from User cause it is very specific to invites
   def self.create_user_from_invite(invite)
+
+    user_exists = User.find_by_email(invite.email)
+    return user if user_exists
+
     username = UserNameSuggester.suggest(invite.email)
 
     DiscourseHub.username_operation do