From 74a5889abef1212d373ea994f1c93daedee8932c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Valim=20and=20Mikel=20Lindsaar?=
 <pair@programming.com>
Date: Tue, 26 Jan 2010 11:49:32 +1100
Subject: Refactor content type setting, added tests to ensure boundary exists
 on multipart and fixed typo

---
 actionmailer/lib/action_mailer/base.rb | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

(limited to 'actionmailer/lib/action_mailer/base.rb')

diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 6c70ce8998..782e9d2c46 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -49,7 +49,7 @@ module ActionMailer #:nodoc:
   #
   # The mail method, if not passed a block, will inspect your views and send all the views with
   # the same name as the method, so the above action would send the +welcome.plain.erb+ view file
-  # as well as the +welcome.html.erb+ view file in a +multipart/alternate+ email.
+  # as well as the +welcome.html.erb+ view file in a +multipart/alternative+ email.
   # 
   # If you want to explicitly render only certain templates, pass a block:
   # 
@@ -162,7 +162,7 @@ module ActionMailer #:nodoc:
   # 
   # Which will (if it had both a <tt>.text.erb</tt> and <tt>.html.erb</tt> tempalte in the view
   # directory), send a complete <tt>multipart/mixed</tt> email with two parts, the first part being
-  # a <tt>multipart/alternate</tt> with the text and HTML email parts inside, and the second being
+  # a <tt>multipart/alternative</tt> with the text and HTML email parts inside, and the second being
   # a <tt>application/pdf</tt> with a Base64 encoded copy of the file.pdf book with the filename
   # +free_book.pdf+.
   #
@@ -445,7 +445,7 @@ module ActionMailer #:nodoc:
     #     format.html { render :text => "<h1>Hello Mikel!</h1>" }
     #   end
     # 
-    # Which will render a <tt>multipart/alternate</tt> email with <tt>text/plain</tt> and
+    # Which will render a <tt>multipart/alternative</tt> email with <tt>text/plain</tt> and
     # <tt>text/html</tt> parts.
     def mail(headers={}, &block)
       # Guard flag to prevent both the old and the new API from firing
@@ -465,10 +465,11 @@ module ActionMailer #:nodoc:
 
       # Render the templates and blocks
       responses, sort_order = collect_responses_and_sort_order(headers, &block)
-      content_type ||= create_parts_from_responses(m, responses, charset)
+      
+      create_parts_from_responses(m, responses, charset)
 
       # Tidy up content type, charset, mime version and sort order
-      m.content_type = content_type
+      m.content_type = set_content_type(m, content_type)
       m.charset      = charset
       m.mime_version = mime_version
       sort_order     = headers[:parts_order] || sort_order || self.class.default_implicit_parts_order.dup
@@ -485,6 +486,20 @@ module ActionMailer #:nodoc:
 
   protected
 
+    def set_content_type(m, user_content_type)
+      params = m.content_type_parameters || {}
+      case
+      when user_content_type.present?
+        user_content_type
+      when m.has_attachments?
+        ["multipart", "mixed", params]
+      when m.multipart?
+        ["multipart", "alternative", params]
+      else
+        self.class.default_content_type.dup
+      end
+    end
+
     def default_subject #:nodoc:
       mailer_scope = self.class.mailer_name.gsub('/', '.')
       I18n.t(:subject, :scope => [:actionmailer, mailer_scope, action_name], :default => action_name.humanize)
@@ -543,16 +558,14 @@ module ActionMailer #:nodoc:
       if responses.size == 1 && !m.has_attachments?
         m.body = responses[0][:body]
         return responses[0][:content_type]
-      elsif responses.size > 1 && m.has_attachments? 
+      elsif responses.size > 1 && m.has_attachments?
         container = Mail::Part.new
-        container.content_type = "multipart/alternate"
+        container.content_type = "multipart/alternative"
         responses.each { |r| insert_part(container, r, charset) }
         m.add_part(container)
       else
         responses.each { |r| insert_part(m, r, charset) }
       end
-
-      m.has_attachments? ? "multipart/mixed" : "multipart/alternate"
     end
 
     def insert_part(container, response, charset) #:nodoc:
-- 
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