Refactor PollHistoryService

RiotSwiftUI/Modules/Room/PollHistory/Service/PollHistoryServiceProtocol.swift

@@ -17,22 +17,8 @@
 import Combine
 
 protocol PollHistoryServiceProtocol {
-    /// Publishes poll data as soon they are found in the timeline.
-    /// Updates are also published here, so clients needs to address duplicates.
-    var pollHistory: AnyPublisher<TimelinePollDetails, Never> { get }
+    var updates: AnyPublisher<TimelinePollDetails, Never> { get }
+    var updatesErrors: AnyPublisher<Error, Never> { get }
     
-    /// Publishes whatever errors produced during the sync.
-    var error: AnyPublisher<PollHistoryError, Never> { get }
-    
-    /// Ask to fetch the next batch of polls.
-    /// Concrete implementations can decide what a batch is.
-    func next()
-    
-    /// Inform whenever the fetch of a new batch of polls starts or ends.
-    var isFetching: AnyPublisher<Bool, Never> { get }
-}
-
-enum PollHistoryError: Error {
-    case paginationFailed(Error)
-    case pollAggregationFailed(Error)
+    func next() -> AnyPublisher<TimelinePollDetails, Error>
 }