Add RemotePost.ifNotModifiedSince

Author: kean

WordPressKit/PostServiceRemoteREST.m

@@ -541,6 +541,9 @@ - (NSDictionary *)parametersWithRemotePost:(RemotePost *)post
         // safety net. An existing post with no create date should publish immediately
         parameters[@"date"] = [[NSDate date] WordPressComJSONString];
     }
+    if (post.ifNotModifiedSince) {
+        parameters[@"if_not_modified_since"] = [post.ifNotModifiedSince WordPressComJSONString];
+    }
     if (post.excerpt) {
         parameters[@"excerpt"] = post.excerpt;
     }

WordPressKit/PostServiceRemoteXMLRPC.m

@@ -407,6 +407,10 @@ - (NSDictionary *)parametersWithRemotePost:(RemotePost *)post
         postParams[@"date_created_gmt"] = [NSDate date];
     }
 
+    if (post.ifNotModifiedSince) {
+        postParams[@"if_not_modified_since"] = post.ifNotModifiedSince;
+    }
+
     if (post.categories) {
         NSArray *categoryNames = [post.categories wp_map:^id(RemotePostCategory *category) {
             return category.name;

WordPressKit/RemotePost.h

@@ -21,6 +21,7 @@ extern NSString * const PostStatusDeleted;
 @property (nonatomic, strong) NSNumber *authorID;
 @property (nonatomic, strong) NSDate *date;
 @property (nonatomic, strong) NSDate *dateModified;
+@property (nonatomic, strong) NSDate *ifNotModifiedSince;
 @property (nonatomic, strong) NSString *title;
 @property (nonatomic, strong) NSURL *URL;
 @property (nonatomic, strong) NSURL *shortURL;