Add support for marking Reader posts seen/unseen

WordPressKit.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name          = "WordPressKit"
-  s.version       = "4.25.0-beta.1"
+  s.version       = "4.25.0-beta.2"
   s.summary       = "WordPressKit offers a clean and simple WordPress.com and WordPress.org API."
 
   s.description   = <<-DESC

WordPressKit/ReaderPostServiceRemote+V2.swift

@@ -44,4 +44,53 @@ extension ReaderPostServiceRemote {
 
         return self.path(forEndpoint: endpoint, withVersion: ._2_0)
     }
+
+
+    /// Sets the `is_seen` status for a given post.
+    ///
+    /// - Parameter seen: the post is to be marked seen or not (unseen)
+    /// - Parameter feedID: feedID of the ReaderPost
+    /// - Parameter feedItemID: feedItemID of the ReaderPost
+    /// - Parameter success: Called when the request succeeds
+    /// - Parameter failure: Called when the request fails
+    @objc
+    public func markPostSeen(seen: Bool,
+                             feedID: NSNumber,
+                             feedItemID: NSNumber,
+                             success: @escaping (() -> Void),
+                             failure: @escaping ((Error) -> Void)) {
+
+        let endpoint = seen ? SeenEndpoints.seen : SeenEndpoints.unseen
+        let path = self.path(forEndpoint: endpoint, withVersion: ._2_0)
+
+        let params = [
+            "feed_id": feedID,
+            "feed_item_ids": [feedItemID],
+            "source": "reader-ios"
+        ] as [String: AnyObject]
+
+        wordPressComRestApi.POST(path, parameters: params, success: { (responseObject, httpResponse) in
+            guard let response = responseObject as? [String: AnyObject],
+                  let status = response["status"] as? Bool,
+                  status == true else {
+                failure(MarkSeenError.failed)
+                return
+            }
+            success()
+        }, failure: { (error, httpResponse) in
+            failure(error)
+        })
+    }
+
+    private enum MarkSeenError: Error {
+        case failed
+    }
+
+    private struct SeenEndpoints {
+        // Creates a new `seen` entry (i.e. mark as seen)
+        static let seen = "seen-posts/seen/new"
+        // Removes the `seen` entry (i.e. mark as unseen)
+        static let unseen = "seen-posts/seen/delete"
+    }
+
 }

WordPressKit/RemoteReaderPost.h

@@ -27,6 +27,7 @@
 @property (nonatomic) BOOL isLiked;
 @property (nonatomic) BOOL isReblogged;
 @property (nonatomic) BOOL isWPCom;
+@property (nonatomic) BOOL isSeen;
 @property (nonatomic, strong) NSNumber *likeCount;
 @property (nonatomic, strong) NSNumber *score;
 @property (nonatomic, strong) NSNumber *siteID;

WordPressKit/RemoteReaderPost.m

@@ -32,6 +32,7 @@
 NSString * const PostRESTKeyIsFollowing = @"is_following";
 NSString * const PostRESTKeyIsJetpack = @"is_jetpack";
 NSString * const PostRESTKeyIsReblogged = @"is_reblogged";
+NSString * const PostRESTKeyIsSeen = @"is_seen";
 NSString * const PostRESTKeyLikeCount = @"like_count";
 NSString * const PostRESTKeyLikesEnabled = @"likes_enabled";
 NSString * const PostRESTKeyName = @"name";
@@ -110,6 +111,7 @@ - (instancetype)initWithDictionary:(NSDictionary *)dict;
     self.isFollowing = [[dict numberForKey:PostRESTKeyIsFollowing] boolValue];
     self.isLiked = [[dict numberForKey:PostRESTKeyILike] boolValue];
     self.isReblogged = [[dict numberForKey:PostRESTKeyIsReblogged] boolValue];
+    self.isSeen = [[dict numberForKey:PostRESTKeyIsSeen] boolValue];
     self.isWPCom = [self isWPComFromPostDictionary:dict];
     self.likeCount = [dict numberForKey:PostRESTKeyLikeCount];
     self.permalink = [self stringOrEmptyString:[dict stringForKey:PostRESTKeyURL]];