Merge remote-tracking branch 'origin/feature/isolate-mail-handling' into develop

1 files changed, 52 insertions, 0 deletions

diff --git a/lib/mail_handler/mail_handler.rb b/lib/mail_handler/mail_handler.rb
new file mode 100644
index 000000000..24d14b5c8
--- /dev/null
+++ b/lib/mail_handler/mail_handler.rb
@@ -0,0 +1,52 @@
+# Handles the parsing of email
+require 'tmpdir'
+
+module MailHandler
+
+    if RUBY_VERSION.to_f >= 1.9
+        require 'backends/mail_extensions'
+        require 'backends/mail_backend'
+        include Backends::MailBackend
+    else
+        require 'backends/tmail_extensions'
+        require 'backends/tmail_backend'
+        include Backends::TmailBackend
+    end
+
+    # Returns a set of attachments from the given TNEF contents
+    # The TNEF contents also contains the message body, but in general this is the
+    # same as the message body in the message proper.
+    def tnef_attachments(content)
+        attachments = []
+        Dir.mktmpdir do |dir|
+            IO.popen("#{`which tnef`.chomp} -K -C #{dir}", "w") do |f|
+                f.write(content)
+                f.close
+                if $?.signaled?
+                    raise IOError, "tnef exited with signal #{$?.termsig}"
+                end
+                if $?.exited? && $?.exitstatus != 0
+                    raise IOError, "tnef exited with status #{$?.exitstatus}"
+                end
+            end
+            found = 0
+            Dir.new(dir).sort.each do |file| # sort for deterministic behaviour
+                if file != "." && file != ".."
+                    file_content = File.open("#{dir}/#{file}", "r").read
+                    attachments << { :content => file_content,
+                                     :filename => file }
+                    found += 1
+                end
+            end
+            if found == 0
+                raise IOError, "tnef produced no attachments"
+            end
+        end
+        attachments
+    end
+
+    # Turn instance methods into class methods
+    extend self
+
+end
+