Added method to retrieve messageId along with tests to CTCoreMessage

Source/CTCoreMessage.h

@@ -124,6 +124,12 @@
 */
 - (BOOL)isNew;
 
+/*!
+	@abstract A machine readable ID that is guaranteed unique by the
+	host that generated the messaeg
+*/
+- (NSString *)messageId;
+
 /*!
 	@abstract	Returns an NSString containing the messages UID.
 */

Source/CTCoreMessage.m

@@ -236,6 +236,13 @@ char * etpan_encode_mime_header(char * phrase)
 	return NO;
 }
 
+- (NSString *)messageId {
+  	if (myFields->fld_message_id != NULL) {
+        char *value = myFields->fld_message_id->mid_value;
+        return [NSString stringWithCString:value encoding:NSASCIIStringEncoding];
+	}
+    return nil;
+}
 
 - (NSString *)uid {
 	return [NSString stringWithCString:myMessage->msg_uid encoding:NSASCIIStringEncoding];

Tests/CTCoreMessageTests.m

@@ -51,6 +51,11 @@
 	STAssertEqualObjects(@"Test value1!", [myMsg subject], @"Basic set and get of subject failed.");
 }
 
+- (void)testBasicMessageId {
+	STAssertEqualObjects(@"20061227050649.BEDF0B8563@theronge.com", [myRealMsg messageId], @"");
+}
+
+
 - (void)testReallyLongSubject {
 	NSString *reallyLongStr = @"faldskjfalkdjfal;skdfjl;ksdjfl;askjdflsadjkfsldfkjlsdfjkldskfjlsdkfjlskdfjslkdfjsdlkfjsdlfkjsdlfkjsdlfkjsdlkfjsdlfkjsdlfkjsldfjksldkfjsldkfjsdlfkjdslfjdsflkjdsflkjdsfldskjfsdlkfjsdlkfjdslkfjsdlkfjdslfkjfaldskjfalkdjfal;skdfjl;ksdjfl;askjdflsadjkfsldfkjlsdfjkldskfjlsdkfjlskdfjslkdfjsdlkfjsdlfkjsdlfkjsdlfkjsdlkfjsdlfkjsdlfkjsldfjksldkfjsldkfjsdlfkjdslfjdsflkjdsflkjdsfldskjfsdlkfjsdlkfjdslkfjsdlkfjdslfkjfaldskjfalkdjfal;skdfjl;ksdjfl;askjdflsadjkfsldfkjlsdfjkldskfjlsdkfjlskdfjslkdfjsdlkfjsdlfkjsdlfkjsdlfkjsdlkfjsdlfkjsdlfkjsldfjksldkfjsldkfjsdlfkjdslfjdsflkjdsflkjdsfldskjfsdlkfjsdlkfjdslkfjsdlkfjdslfkjaskjdflsadjkfsldfkjlsdfjkldskfjlsdkfjlskdfjslkdfjsdlkfjsdlfkjsdlfkjsdlfkjsdlkfjsdlfkjsdlfkjsldfjksldkfjsldkfjsdlfkjdslfjdsflkjdsflkjdsfldskjfsdlkfjsdlkfjdslkfjsdlkfjdslfkjaskjdflsadjkfsldfkjlsdfjkldskfjlsdkfjlskdfjslkdfjsdlkfjsdlfkjsdlfkjsdlfkjsdlkfjsdlfkjsdlfkjsldfjksldkfjsldkfjsdlfkjdslfjdsflkjdsflkjdsfldskjfsdlkfjsdlkfjdslkfjsdlkfjdslfkj";
 	[myMsg setSubject:reallyLongStr];