Refactoring

submodules/TelegramCore/Sources/State/ManagedSynchronizeConsumeMessageContentsOperations.swift

@@ -0,0 +1,145 @@
+import Foundation
+import Postbox
+import SwiftSignalKit
+import TelegramApi
+import MtProtoKit
+
+import SyncCore
+
+private final class ManagedSynchronizeConsumeMessageContentsOperationHelper {
+    var operationDisposables: [Int32: Disposable] = [:]
+    
+    func update(_ entries: [PeerMergedOperationLogEntry]) -> (disposeOperations: [Disposable], beginOperations: [(PeerMergedOperationLogEntry, MetaDisposable)]) {
+        var disposeOperations: [Disposable] = []
+        var beginOperations: [(PeerMergedOperationLogEntry, MetaDisposable)] = []
+        
+        var hasRunningOperationForPeerId = Set<PeerId>()
+        var validMergedIndices = Set<Int32>()
+        for entry in entries {
+            if !hasRunningOperationForPeerId.contains(entry.peerId) {
+                hasRunningOperationForPeerId.insert(entry.peerId)
+                validMergedIndices.insert(entry.mergedIndex)
+                
+                if self.operationDisposables[entry.mergedIndex] == nil {
+                    let disposable = MetaDisposable()
+                    beginOperations.append((entry, disposable))
+                    self.operationDisposables[entry.mergedIndex] = disposable
+                }
+            }
+        }
+        
+        var removeMergedIndices: [Int32] = []
+        for (mergedIndex, disposable) in self.operationDisposables {
+            if !validMergedIndices.contains(mergedIndex) {
+                removeMergedIndices.append(mergedIndex)
+                disposeOperations.append(disposable)
+            }
+        }
+        
+        for mergedIndex in removeMergedIndices {
+            self.operationDisposables.removeValue(forKey: mergedIndex)
+        }
+        
+        return (disposeOperations, beginOperations)
+    }
+    
+    func reset() -> [Disposable] {
+        let disposables = Array(self.operationDisposables.values)
+        self.operationDisposables.removeAll()
+        return disposables
+    }
+}
+
+private func withTakenOperation(postbox: Postbox, peerId: PeerId, tagLocalIndex: Int32, _ f: @escaping (Transaction, PeerMergedOperationLogEntry?) -> Signal<Void, NoError>) -> Signal<Void, NoError> {
+    return postbox.transaction { transaction -> Signal<Void, NoError> in
+        var result: PeerMergedOperationLogEntry?
+        transaction.operationLogUpdateEntry(peerId: peerId, tag: OperationLogTags.SynchronizeConsumeMessageContents, tagLocalIndex: tagLocalIndex, { entry in
+            if let entry = entry, let _ = entry.mergedIndex, entry.contents is SynchronizeConsumeMessageContentsOperation  {
+                result = entry.mergedEntry!
+                return PeerOperationLogEntryUpdate(mergedIndex: .none, contents: .none)
+            } else {
+                return PeerOperationLogEntryUpdate(mergedIndex: .none, contents: .none)
+            }
+        })
+        
+        return f(transaction, result)
+    } |> switchToLatest
+}
+
+func managedSynchronizeConsumeMessageContentOperations(postbox: Postbox, network: Network, stateManager: AccountStateManager) -> Signal<Void, NoError> {
+    return Signal { _ in
+        let helper = Atomic<ManagedSynchronizeConsumeMessageContentsOperationHelper>(value: ManagedSynchronizeConsumeMessageContentsOperationHelper())
+        
+        let disposable = postbox.mergedOperationLogView(tag: OperationLogTags.SynchronizeConsumeMessageContents, limit: 10).start(next: { view in
+            let (disposeOperations, beginOperations) = helper.with { helper -> (disposeOperations: [Disposable], beginOperations: [(PeerMergedOperationLogEntry, MetaDisposable)]) in
+                return helper.update(view.entries)
+            }
+            
+            for disposable in disposeOperations {
+                disposable.dispose()
+            }
+            
+            for (entry, disposable) in beginOperations {
+                let signal = withTakenOperation(postbox: postbox, peerId: entry.peerId, tagLocalIndex: entry.tagLocalIndex, { transaction, entry -> Signal<Void, NoError> in
+                    if let entry = entry {
+                        if let operation = entry.contents as? SynchronizeConsumeMessageContentsOperation {
+                            return synchronizeConsumeMessageContents(transaction: transaction, network: network, stateManager: stateManager, peerId: entry.peerId, operation: operation)
+                        } else {
+                            assertionFailure()
+                        }
+                    }
+                    return .complete()
+                })
+                    |> then(postbox.transaction { transaction -> Void in
+                        let _ = transaction.operationLogRemoveEntry(peerId: entry.peerId, tag: OperationLogTags.SynchronizeConsumeMessageContents, tagLocalIndex: entry.tagLocalIndex)
+                    })
+                
+                disposable.set(signal.start())
+            }
+        })
+        
+        return ActionDisposable {
+            let disposables = helper.with { helper -> [Disposable] in
+                return helper.reset()
+            }
+            for disposable in disposables {
+                disposable.dispose()
+            }
+            disposable.dispose()
+        }
+    }
+}
+
+private func synchronizeConsumeMessageContents(transaction: Transaction, network: Network, stateManager: AccountStateManager, peerId: PeerId, operation: SynchronizeConsumeMessageContentsOperation) -> Signal<Void, NoError> {
+    if peerId.namespace == Namespaces.Peer.CloudUser || peerId.namespace == Namespaces.Peer.CloudGroup {
+        return network.request(Api.functions.messages.readMessageContents(id: operation.messageIds.map { $0.id }))
+        |> map(Optional.init)
+        |> `catch` { _ -> Signal<Api.messages.AffectedMessages?, NoError> in
+            return .single(nil)
+        }
+        |> mapToSignal { result -> Signal<Void, NoError> in
+            if let result = result {
+                switch result {
+                    case let .affectedMessages(pts, ptsCount):
+                        stateManager.addUpdateGroups([.updatePts(pts: pts, ptsCount: ptsCount)])
+                }
+            }
+            return .complete()
+        }
+    } else if peerId.namespace == Namespaces.Peer.CloudChannel {
+        if let peer = transaction.getPeer(peerId), let inputChannel = apiInputChannel(peer) {
+            return network.request(Api.functions.channels.readMessageContents(channel: inputChannel, id: operation.messageIds.map { $0.id }))
+            |> map(Optional.init)
+            |> `catch` { _ -> Signal<Api.Bool?, NoError> in
+                return .single(nil)
+            }
+            |> mapToSignal { result -> Signal<Void, NoError> in
+                return .complete()
+            }
+        } else {
+            return .complete()
+        }
+    } else {
+        return .complete()
+    }
+}