Merge branch 'base36_messageids' of git://github.com/steveluscher/FayeObjC into steveluscher-base36_messageids

FayeObjc/FayeClient.h

@@ -69,6 +69,7 @@ enum _fayeStates {
   BOOL fayeConnected;  
   NSDictionary *connectionExtension;
   BOOL connectionInitiated;
+  uint32_t messageNumber;
 }
 
 @property (strong) NSString *fayeURLString;

FayeObjc/FayeClient.m

@@ -190,6 +190,26 @@
   }
 }
 
+- (NSString *) base36Encode:(uint32_t)value
+{
+  NSString *base36 = @"0123456789abcdefghijklmnopqrstuvwxyz";
+  NSString *buffer = @"";
+  
+  do {
+    NSString *newChar = [NSString stringWithFormat:@"%c", [base36 characterAtIndex:(value % 36)]];
+    buffer = [newChar stringByAppendingString:buffer];
+  } while (value /= 36);
+  
+  return buffer;
+}
+
+- (NSString *) nextMessageId
+{
+  messageNumber++;
+  if (messageNumber >= UINT32_MAX) messageNumber = 0;
+  
+  return [self base36Encode:messageNumber];
+}
 
 #pragma mark -
 #pragma mark WebSocket connection
@@ -293,7 +313,7 @@
     return;
   }
   
-  NSString *messageId = [NSString stringWithFormat:@"msg_%d_%d", (int)[[NSDate date] timeIntervalSince1970], 1];
+  NSString *messageId = [self nextMessageId];
   NSDictionary *dict = nil;
   
   if(nil == extension) {