Change so that we only send 300 markers per request. Fixes #3711

Account/Sources/Account/Feedly/FeedlyAPICaller.swift

@@ -7,6 +7,7 @@
 //
 
 import Foundation
+import RSCore
 import RSWeb
 import Secrets
 
@@ -820,6 +821,12 @@ extension FeedlyAPICaller: FeedlyMarkArticlesService {
 			fatalError("\(components) does not produce a valid URL.")
 		}
 		
+		let articleIdChunks = Array(articleIds).chunked(into: 300)
+		let dispatchGroup = DispatchGroup()
+		var groupError: Error? = nil
+
+		for articleIdChunk in articleIdChunks {
+			
 			var request = URLRequest(url: url)
 			request.httpMethod = "POST"
 			request.addValue("application/json", forHTTPHeaderField: HTTPRequestHeader.contentType)
@@ -827,7 +834,7 @@ extension FeedlyAPICaller: FeedlyMarkArticlesService {
 			request.addValue("OAuth \(accessToken)", forHTTPHeaderField: HTTPRequestHeader.authorization)
 			
 			do {
-			let body = MarkerEntriesBody(action: action.actionValue, entryIds: Array(articleIds))
+				let body = MarkerEntriesBody(action: action.actionValue, entryIds: Array(articleIdChunk))
 				let encoder = JSONEncoder()
 				let data = try encoder.encode(body)
 				request.httpBody = data
@@ -837,16 +844,25 @@ extension FeedlyAPICaller: FeedlyMarkArticlesService {
 				}
 			}
 			
+			dispatchGroup.enter()
 			send(request: request, resultType: String.self, dateDecoding: .millisecondsSince1970, keyDecoding: .convertFromSnakeCase) { result in
 				switch result {
 				case .success(let (httpResponse, _)):
-				if httpResponse.statusCode == 200 {
-					completion(.success(()))
-				} else {
-					completion(.failure(URLError(.cannotDecodeContentData)))
+					if httpResponse.statusCode != 200 {
+						groupError = URLError(.cannotDecodeContentData)
 					}
 				case .failure(let error):
-				completion(.failure(error))
+					groupError = error
+				}
+				dispatchGroup.leave()
+			}
+		}
+		
+		dispatchGroup.notify(queue: .main) {
+			if let groupError = groupError {
+				completion(.failure(groupError))
+			} else {
+				completion(.success(()))
 			}
 		}
 	}