Commit avar's patch (+ fix for user not found) to change message sending URL to be by user name rather than id.

(Closes #1920)

app/controllers/message_controller.rb

@@ -10,27 +10,29 @@ class MessageController < ApplicationController
   # Allow the user to write a new message to another user. This action also 
   # deals with the sending of that message to the other user when the user
   # clicks send.
-  # The user_id param is the id of the user that the message is being sent to.
+  # The display_name param is the display name of the user that the message is being sent to.
   def new
     @title = t 'message.new.title'
-    @to_user = User.find(params[:user_id])
-    if params[:message]
-      @message = Message.new(params[:message])
-      @message.to_user_id = @to_user.id
-      @message.from_user_id = @user.id
-      @message.sent_on = Time.now.getutc
-   
-      if @message.save
-        flash[:notice] = t 'message.new.message_sent'
-        Notifier::deliver_message_notification(@message)
-        redirect_to :controller => 'message', :action => 'inbox', :display_name => @user.display_name
+    @to_user = User.find_by_display_name(params[:display_name])
+    if @to_user
+      if params[:message]
+        @message = Message.new(params[:message])
+        @message.to_user_id = @to_user.id
+        @message.from_user_id = @user.id
+        @message.sent_on = Time.now.getutc
+
+        if @message.save
+          flash[:notice] = t 'message.new.message_sent'
+          Notifier::deliver_message_notification(@message)
+          redirect_to :controller => 'message', :action => 'inbox', :display_name => @user.display_name
+        end
+      else
+        @title = params[:title]
       end
     else
-      @title = params[:title]
+      @title = t'message.no_such_user.title'
+      render :action => 'no_such_user', :status => :not_found
     end
-  rescue ActiveRecord::RecordNotFound
-    @title = t'message.no_such_user.title'
-    render :action => 'no_such_user', :status => :not_found
   end
 
   # Allow the user to reply to another message.

app/views/message/new.html.erb

@@ -2,7 +2,7 @@
 
 <%= error_messages_for 'message' %>
 
-<% form_for :message, :url => { :action => "new", :user_id => @to_user.id } do |f| %>
+<% form_for :message, :url => { :action => "new", :display_name => @to_user.display_name } do |f| %>
   <table>
     <tr valign="top">
       <th><%= t'message.new.subject' %></th>

app/views/user/view.html.erb

@@ -9,7 +9,7 @@
 | <%= link_to t('user.view.my settings'), :controller => 'user', :action => 'account', :display_name => @user.display_name %>
 <% else %>
 <!-- Displaying another user's profile page -->
-<%= link_to t('user.view.send message'), :controller => 'message', :action => 'new', :user_id => @this_user.id %>
+<%= link_to t('user.view.send message'), :controller => 'message', :action => 'new', :display_name => @this_user.display_name %>
 | <%= link_to t('user.view.diary'), :controller => 'diary_entry', :action => 'list', :display_name => @this_user.display_name %>
 | <%= link_to t('user.view.edits'), :controller => 'changeset', :action => 'list_user', :display_name => @this_user.display_name %>
 | <%= link_to t('user.view.traces'), :controller => 'trace', :action => 'view', :display_name => @this_user.display_name %>