From 5af9ec1c35e7e9a2bf225e4ccdf2b0fde0efca4b Mon Sep 17 00:00:00 2001
From: Steven Luscher <github@stevenluscherdesign.com>
Date: Sun, 10 Feb 2013 23:12:01 -0800
Subject: [PATCH] Now generating message ids using sequential, base 36 encoded
 integers.

---
 FayeObjc/FayeClient.h |  1 +
 FayeObjc/FayeClient.m | 22 +++++++++++++++++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/FayeObjc/FayeClient.h b/FayeObjc/FayeClient.h
index 92c540f..436c68b 100644
--- a/FayeObjc/FayeClient.h
+++ b/FayeObjc/FayeClient.h
@@ -69,6 +69,7 @@ enum _fayeStates {
   BOOL fayeConnected;  
   NSDictionary *connectionExtension;
   BOOL connectionInitiated;
+  uint32_t messageNumber;
 }
 
 @property (strong) NSString *fayeURLString;
diff --git a/FayeObjc/FayeClient.m b/FayeObjc/FayeClient.m
index 73ddb40..c617fd9 100644
--- a/FayeObjc/FayeClient.m
+++ b/FayeObjc/FayeClient.m
@@ -192,6 +192,26 @@
   }
 }
 
+- (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
@@ -306,7 +326,7 @@
     return;
   }
   
-  NSString *messageId = [NSString stringWithFormat:@"msg_%d_%d", (int)[[NSDate date] timeIntervalSince1970], 1];
+  NSString *messageId = [self nextMessageId];
   NSDictionary *dict = nil;
   
   if(nil == extension) {