Validate presence of message text on conversations. Closes #1329.

app/controllers/conversations_controller.rb

@@ -31,17 +31,19 @@ class ConversationsController < ApplicationController
     message_text = params[:conversation].delete(:text)
     params[:conversation][:messages_attributes] = [ {:author => current_user.person, :text => message_text }]
 
-    if @conversation = Conversation.create(params[:conversation])
+    @conversation = Conversation.new(params[:conversation])
+    if @conversation.save
       Postzord::Dispatch.new(current_user, @conversation).post
-
       flash[:notice] = I18n.t('conversations.create.sent')
+    else
+      flash[:error] = I18n.t('conversations.create.fail')
+    end
     if params[:profile]
       redirect_to person_path(params[:profile])
     else
       redirect_to conversations_path(:conversation_id => @conversation.id)
     end
   end
-  end
 
   def show
     if @conversation = Conversation.joins(:conversation_visibilities).where(:id => params[:id],

app/controllers/messages_controller.rb

@@ -19,11 +19,10 @@ class MessagesController < ApplicationController
       if message.save
         Rails.logger.info("event=create type=comment user=#{current_user.diaspora_handle} status=success message=#{message.id} chars=#{params[:message][:text].length}")
         Postzord::Dispatch.new(current_user, message).post
-
-        redirect_to conversations_path(:conversation_id => cnv.id)
       else
-        render :nothing => true, :status => 422
+        flash[:error] = I18n.t('conversations.new_message.fail')
       end
+      redirect_to conversations_path(:conversation_id => cnv.id)
     else
       render :nothing => true, :status => 422
     end

app/models/message.rb

@@ -14,6 +14,8 @@ class Message < ActiveRecord::Base
   belongs_to :author, :class_name => 'Person'
   belongs_to :conversation, :touch => true
 
+  validates_presence_of :text
+
   after_create do
     #sign comment as commenter
     self.author_signature = self.sign_with_key(self.author.owner.encryption_key) if self.author.owner

config/locales/diaspora/en.yml

@@ -257,6 +257,9 @@ en:
         other: "%{count} new messages"
     create:
       sent: "Message sent"
+      fail: "Invalid message"
+    new_message:
+      fail: "Invalid message"
     destroy:
       success: "Conversation successfully removed"
 

features/conversations.feature

@@ -16,3 +16,7 @@ Feature: private messages
     And I should see "Greetings" within "#conversation_show"
     And "Alice Awesome" should be part of active conversation
     And I should see "hello, alice!" within ".stream"
+
+  Scenario: send an empty message
+    Given I send a message with subject "Greetings" and text " " to "Alice Awesome"
+    Then I should not see "Greetings" within "#conversation_inbox"

spec/controllers/conversations_controller_spec.rb

@@ -54,11 +54,13 @@ describe ConversationsController do
   end
 
   describe '#create' do
+    context 'with a valid conversation' do
       before do
         @hash = {
           :conversation => {
             :subject => "secret stuff",
-          :text => 'text'},
+            :text => 'text debug'
+          },
           :contact_ids => [alice.contacts.first.id]
         }
       end
@@ -91,6 +93,7 @@ describe ConversationsController do
             :messages_attributes => [ {:author => alice.person, :text => 'cool stuff'} ]
           }
         )
+
         p = Postzord::Dispatch.new(alice, cnv)
         Postzord::Dispatch.stub!(:new).and_return(p)
         p.should_receive(:post)
@@ -98,6 +101,31 @@ describe ConversationsController do
       end
     end
 
+    context 'with empty text' do
+      before do
+        @hash = {
+          :conversation => {
+            :subject => 'secret stuff',
+            :text => '  '
+          },
+          :contact_ids => [alice.contacts.first.id]
+        }
+      end
+
+      it 'does not create a conversation' do
+        lambda {
+          post :create, @hash
+        }.should_not change(Conversation, :count).by(1)
+      end
+
+      it 'does not create a message' do
+        lambda {
+          post :create, @hash
+        }.should_not change(Message, :count).by(1)
+      end
+    end
+  end
+
   describe '#show' do
     before do
       hash = {

spec/controllers/messages_controller_spec.rb

@@ -28,6 +28,10 @@ describe MessagesController do
     context "on my own post" do
       before do
         @cnv = Conversation.create(@create_hash)
+      end
+
+      context "with a valid message" do
+        before do
           @message_hash = {:conversation_id => @cnv.id, :message => {:text => "here is something else"}}
         end
 
@@ -40,6 +44,21 @@ describe MessagesController do
         end
       end
 
+      context "with an empty message" do
+        before do
+          @message_hash = {:conversation_id => @cnv.id, :message => {:text => " "}}
+        end
+
+        it 'redirects to conversation' do
+          lambda{
+            post :create, @message_hash
+          }.should_not change(Message, :count).by(1)
+          response.code.should == '302'
+          response.should redirect_to(conversations_path(:conversation_id => @cnv))
+        end
+      end
+    end
+
     context "on a post from a contact" do
       before do
         @create_hash[:author] = @user2.person