Mark as read based on URL too

This is mostly because NSUserNotificationCenter doesn't let you store any non-plist types in a userInfo dictionary.

Author: jspahrsummers

OctoKit/OCTClient.h

@@ -254,13 +254,13 @@ extern NSString * const OCTClientErrorHTTPStatusCodeKey;
 // `authenticated`, the signal will error immediately.
 - (RACSignal *)fetchNotificationsNotMatchingEtag:(NSString *)etag includeReadNotifications:(BOOL)includeRead updatedSince:(NSDate *)since;
 
-// Mark the notification has having been read.
+// Mark a notification thread as having been read.
 //
-// notification - The notification to mark as read. Cannot be nil.
+// threadURL - The API URL of the thread to mark as read. Cannot be nil.
 //
 // Returns a signal which will send completed on success. If the client is not
 // `authenticated`, the signal will error immediately.
-- (RACSignal *)markNotificationAsRead:(OCTNotification *)notification;
+- (RACSignal *)markNotificationThreadAsReadAtURL:(NSURL *)threadURL;
 
 // Mutes all further notifications from a thread.
 //

OctoKit/OCTClient.m

@@ -531,17 +531,17 @@ - (RACSignal *)fetchNotificationsNotMatchingEtag:(NSString *)etag includeReadNot
 	return [self enqueueRequest:request resultClass:OCTNotification.class];
 }
 
-- (RACSignal *)markNotificationAsRead:(OCTNotification *)notification {
-	return [self patchNotification:notification withReadStatus:YES];
+- (RACSignal *)markNotificationThreadAsReadAtURL:(NSURL *)threadURL {
+	return [self patchThreadURL:threadURL withReadStatus:YES];
 }
 
-- (RACSignal *)patchNotification:(OCTNotification *)notification withReadStatus:(BOOL)read {
-	NSParameterAssert(notification != nil);
+- (RACSignal *)patchThreadURL:(NSURL *)threadURL withReadStatus:(BOOL)read {
+	NSParameterAssert(threadURL != nil);
 
 	if (!self.authenticated) return [RACSignal error:self.class.authenticationRequiredError];
 
 	NSMutableURLRequest *request = [self requestWithMethod:@"PATCH" path:@"" parameters:@{ @"read": @(read) }];
-	request.URL = notification.threadURL;
+	request.URL = threadURL;
 	return [[self enqueueRequest:request resultClass:nil] ignoreElements];
 }