Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/Postbox/Sources/AllChatListHolesView.swift

@@ -0,0 +1,67 @@
+import Foundation
+
+final class MutableAllChatListHolesView: MutablePostboxView {
+    fileprivate let groupId: PeerGroupId
+    private var holes = Set<ChatListHole>()
+    fileprivate var latestHole: ChatListHole?
+    
+    init(postbox: PostboxImpl, groupId: PeerGroupId) {
+        self.groupId = groupId
+        self.holes = Set(postbox.chatListTable.allHoles(groupId: groupId))
+        self.latestHole = self.holes.max(by: { $0.index < $1.index })
+    }
+    
+    func replay(postbox: PostboxImpl, transaction: PostboxTransaction) -> Bool {
+        if let operations = transaction.chatListOperations[self.groupId] {
+            var updated = false
+            for operation in operations {
+                switch operation {
+                case let .InsertHole(hole):
+                    if !self.holes.contains(hole) {
+                        self.holes.insert(hole)
+                        updated = true
+                    }
+                case let .RemoveHoles(indices):
+                    for index in indices {
+                        if self.holes.contains(ChatListHole(index: index.messageIndex)) {
+                            self.holes.remove(ChatListHole(index: index.messageIndex))
+                            updated = true
+                        }
+                    }
+                default:
+                    break
+                }
+            }
+            
+            if updated {
+                let updatedLatestHole = self.holes.max(by: { $0.index < $1.index })
+                if updatedLatestHole != self.latestHole {
+                    self.latestHole = updatedLatestHole
+                    return true
+                } else {
+                    return false
+                }
+            } else {
+                return false
+            }
+        } else {
+            return false
+        }
+    }
+
+    func refreshDueToExternalTransaction(postbox: PostboxImpl) -> Bool {
+        return false
+    }
+    
+    func immutableView() -> PostboxView {
+        return AllChatListHolesView(self)
+    }
+}
+
+public final class AllChatListHolesView: PostboxView {
+    public let latestHole: ChatListHole?
+    
+    init(_ view: MutableAllChatListHolesView) {
+        self.latestHole = view.latestHole
+    }
+}