- Update

Extensions/XEP-0203/NSXMLElement+XEP_0203.h

@@ -0,0 +1,12 @@
+#import <Foundation/Foundation.h>
+#if TARGET_OS_IPHONE
+#import "DDXML.h"
+#endif
+
+
+@interface NSXMLElement (XEP_0203)
+
+- (BOOL)wasDelayed;
+- (NSDate *)delayedDeliveryDate;
+
+@end

Extensions/XEP-0203/NSXMLElement+XEP_0203.m

@@ -0,0 +1,84 @@
+#import "NSXMLElement+XEP_0203.h"
+#import "XMPPDateTimeProfiles.h"
+#import "NSXMLElement+XMPP.h"
+
+#if ! __has_feature(objc_arc)
+#warning This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
+#endif
+
+@implementation NSXMLElement (XEP_0203)
+
+- (BOOL)wasDelayed
+{
+	NSXMLElement *delay;
+	
+	delay = [self elementForName:@"delay" xmlns:@"urn:xmpp:delay"];
+	if (delay)
+	{
+		return YES;
+	}
+	
+	delay = [self elementForName:@"x" xmlns:@"jabber:x:delay"];
+	if (delay)
+	{
+		return YES;
+	}
+	
+	return NO;
+}
+
+- (NSDate *)delayedDeliveryDate
+{
+	NSXMLElement *delay;
+	
+	// From XEP-0203 (Delayed Delivery)
+	//
+	// <delay xmlns='urn:xmpp:delay'
+	//         from='juliet@capulet.com/balcony'
+	//        stamp='2002-09-10T23:41:07Z'/>
+	//
+	// The format [of the stamp attribute] MUST adhere to the dateTime format
+	// specified in XEP-0082 and MUST be expressed in UTC.
+	
+	delay = [self elementForName:@"delay" xmlns:@"urn:xmpp:delay"];
+	if (delay)
+	{
+		NSString *stampValue = [delay attributeStringValueForName:@"stamp"];
+		
+		// There are other considerations concerning XEP-0082.
+		// For example, it may optionally contain milliseconds.
+		// And it may possibly express UTC as "+00:00" instead of "Z".
+		//
+		// Thankfully there is already an implementation that takes into account all these possibilities.
+		
+		return [XMPPDateTimeProfiles parseDateTime:stampValue];
+	}
+	
+	// From XEP-0091 (Legacy Delayed Delivery)
+	//
+	// <x xmlns='jabber:x:delay'
+	//     from='capulet.com'
+	//    stamp='20020910T23:08:25'>
+	
+	delay = [self elementForName:@"x" xmlns:@"jabber:x:delay"];
+	if (delay)
+	{
+		NSDate *stamp;
+		
+		NSString *stampValue = [delay attributeStringValueForName:@"stamp"];
+		
+		NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
+		[dateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
+        [dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]];
+		[dateFormatter setDateFormat:@"yyyyMMdd'T'HH:mm:ss"];
+		[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"GMT"]];
+		
+		stamp = [dateFormatter dateFromString:stampValue];
+		
+		return stamp;
+	}
+	
+	return nil;
+}
+
+@end