GetStream · laevandus · Oct 10, 2025 · Oct 3, 2025 · Oct 3, 2025 · Oct 8, 2025
@@ -32,7 +32,7 @@ class DemoShareViewModel: ObservableObject, ChatChannelControllerDelegate {
         chatClient.currentUserId
     }
 
-    @Published var channels = LazyCachedMapCollection<ChatChannel>()
+    @Published var channels: [ChatChannel] = []
     @Published var text = ""
     @Published var images = [UIImage]()
     @Published var selectedChannel: ChatChannel?

@@ -18,7 +18,7 @@ extension ChatChannelController {
         @Published public private(set) var channel: ChatChannel?
 
         /// The messages related to the channel.
-        @Published public private(set) var messages: LazyCachedMapCollection<ChatMessage> = []
+        @Published public private(set) var messages: [ChatMessage] = []
 
         /// The current state of the Controller.
         @Published public private(set) var state: DataController.State

@@ -55,7 +55,7 @@ public class ChatChannelController: DataController, DelegateCallable, DataStoreP
     /// To observe changes of the messages, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
     ///
-    public var messages: LazyCachedMapCollection<ChatMessage> {
+    public var messages: [ChatMessage] {
         if state == .initialized {
             setLocalStateBasedOnError(startDatabaseObservers())
         }
@@ -1697,7 +1697,7 @@ public class ChatChannelController: DataController, DelegateCallable, DataStoreP
     public func getFirstUnreadMessageId(for channel: ChatChannel) -> MessageId? {
         UnreadMessageLookup.firstUnreadMessageId(
             in: channel,
-            messages: StreamCollection(messages),
+            messages: messages,
             hasLoadedAllPreviousMessages: hasLoadedAllPreviousMessages,
             currentUserId: client.currentUserId
         )

@@ -15,7 +15,7 @@ extension ChatChannelListController {
         public let controller: ChatChannelListController
 
         /// The channels matching the query.
-        @Published public private(set) var channels: LazyCachedMapCollection<ChatChannel> = []
+        @Published public private(set) var channels: [ChatChannel] = []
 
         /// The current state of the Controller.
         @Published public private(set) var state: DataController.State

@@ -45,7 +45,7 @@ public class ChatChannelListController: DataController, DelegateCallable, DataSt
     /// To observe changes of the channels, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
     ///
-    public var channels: LazyCachedMapCollection<ChatChannel> {
+    public var channels: [ChatChannel] {
         startChannelListObserverIfNeeded()
         return channelListObserver.items
     }

@@ -16,7 +16,7 @@ extension ChatChannelWatcherListController {
         public let controller: ChatChannelWatcherListController
 
         /// The channel members.
-        @Published public private(set) var watchers: LazyCachedMapCollection<ChatUser> = []
+        @Published public private(set) var watchers: [ChatUser] = []
 
         /// The current state of the controller.
         @Published public private(set) var state: DataController.State

@@ -27,7 +27,7 @@ public class ChatChannelWatcherListController: DataController, DelegateCallable,
     /// The channel watchers matching the query.
     /// To observe the watcher list changes, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
-    public var watchers: LazyCachedMapCollection<ChatUser> {
+    public var watchers: [ChatUser] {
         startObservingIfNeeded()
         return watchersObserver.items
     }

@@ -6,8 +6,8 @@ import CoreData
 import Foundation
 
 class BackgroundListDatabaseObserver<Item: Sendable, DTO: NSManagedObject>: BackgroundDatabaseObserver<Item, DTO>, @unchecked Sendable {
-    var items: LazyCachedMapCollection<Item> {
-        LazyCachedMapCollection(elements: rawItems)
+    var items: [Item] {
+        rawItems
     }
 
     init(

@@ -16,7 +16,7 @@ extension ChatChannelMemberListController {
         public let controller: ChatChannelMemberListController
 
         /// The channel members.
-        @Published public private(set) var members: LazyCachedMapCollection<ChatChannelMember> = []
+        @Published public private(set) var members: [ChatChannelMember] = []
 
         /// The current state of the controller.
         @Published public private(set) var state: DataController.State

@@ -29,7 +29,7 @@ public class ChatChannelMemberListController: DataController, DelegateCallable,
     /// The channel members matching the query.
     /// To observe the member list changes, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
-    public var members: LazyCachedMapCollection<ChatChannelMember> {
+    public var members: [ChatChannelMember] {
         startObservingIfNeeded()
         return memberListObserver.items
     }

@@ -18,7 +18,7 @@ extension ChatMessageController {
         @Published public private(set) var message: ChatMessage?
 
         /// The replies the message controller observes.
-        @Published public private(set) var replies: LazyCachedMapCollection<ChatMessage> = []
+        @Published public private(set) var replies: [ChatMessage] = []
 
         /// The reactions the message controller observes.
         @Published public private(set) var reactions: [ChatMessageReaction] = []

@@ -47,7 +47,7 @@ public class ChatMessageController: DataController, DelegateCallable, DataStoreP
     /// To observe changes of the replies, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
     ///
-    public var replies: LazyCachedMapCollection<ChatMessage> {
+    public var replies: [ChatMessage] {
         startObserversIfNeeded()
         return repliesObserver?.items ?? []
     }

@@ -40,7 +40,7 @@ public class MessageReminderListController: DataController, DelegateCallable, Da
     ///
     /// To observe changes of the reminders, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
-    public var reminders: LazyCachedMapCollection<MessageReminder> {
+    public var reminders: [MessageReminder] {
         startMessageRemindersObserverIfNeeded()
         return messageRemindersObserver.items
     }

@@ -18,7 +18,7 @@ extension PollController {
         @Published public private(set) var poll: Poll?
 
         /// The current user's votes.
-        @Published public private(set) var ownVotes: LazyCachedMapCollection<PollVote> = []
+        @Published public private(set) var ownVotes: [PollVote] = []
 
         /// The current state of the controller.
         @Published public private(set) var state: DataController.State

@@ -35,7 +35,7 @@ public class PollController: DataController, DelegateCallable, DataStoreProvider
     }
 
     /// Returns the current user's votes.
-    public var ownVotes: LazyCachedMapCollection<PollVote> {
+    public var ownVotes: [PollVote] {
         ownVotesObserver.items
     }
 

@@ -16,7 +16,7 @@ extension PollVoteListController {
         public let controller: PollVoteListController
 
         /// The poll votes.
-        @Published public private(set) var votes: LazyCachedMapCollection<PollVote> = []
+        @Published public private(set) var votes: [PollVote] = []
 
         /// The current state of the controller.
         @Published public private(set) var state: DataController.State

@@ -41,7 +41,7 @@ public class PollVoteListController: DataController, DelegateCallable, DataStore
     ///
     /// To observe changes of the votes, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
-    public var votes: LazyCachedMapCollection<PollVote> {
+    public var votes: [PollVote] {
         startPollVotesListObserverIfNeeded()
         return pollVotesObserver.items
     }

@@ -16,7 +16,7 @@ extension ChatReactionListController {
         public let controller: ChatReactionListController
 
         /// The message reactions.
-        @Published public private(set) var reactions: LazyCachedMapCollection<ChatMessageReaction> = []
+        @Published public private(set) var reactions: [ChatMessageReaction] = []
 
         /// The current state of the controller.
         @Published public private(set) var state: DataController.State

@@ -32,7 +32,7 @@ public class ChatReactionListController: DataController, DelegateCallable, DataS
     ///
     /// To observe changes of the reactions, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
-    public var reactions: LazyCachedMapCollection<ChatMessageReaction> {
+    public var reactions: [ChatMessageReaction] {
         startReactionListObserverIfNeeded()
         return reactionListObserver.items
     }

@@ -15,7 +15,7 @@ extension ChatMessageSearchController {
         public let controller: ChatMessageSearchController
 
         /// The current result of messages.
-        @Published public private(set) var messages: LazyCachedMapCollection<ChatMessage> = []
+        @Published public private(set) var messages: [ChatMessage] = []
 
         /// The current state of the controller.
         @Published public private(set) var state: DataController.State

@@ -61,7 +61,7 @@ public class ChatMessageSearchController: DataController, DelegateCallable, Data
     ///
     /// To observe changes of the messages, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
-    public var messages: LazyCachedMapCollection<ChatMessage> {
+    public var messages: [ChatMessage] {
         startObserversIfNeeded()
         return messagesObserver?.items ?? []
     }

@@ -15,7 +15,7 @@ extension ChatThreadListController {
         internal let controller: ChatThreadListController
 
         /// The threads.
-        @Published internal private(set) var threads: LazyCachedMapCollection<ChatThread> = []
+        @Published internal private(set) var threads: [ChatThread] = []
 
         /// The current state of the controller.
         @Published internal private(set) var state: DataController.State

@@ -34,7 +34,7 @@ public class ChatThreadListController: DataController, DelegateCallable, DataSto
     ///
     /// To observe changes of the threads, set your class as a delegate of this controller
     /// or use the provided combine publishers.
-    public var threads: LazyCachedMapCollection<ChatThread> {
+    public var threads: [ChatThread] {
         startThreadListObserverIfNeeded()
         return threadListObserver.items
     }

@@ -15,7 +15,7 @@ extension ChatUserListController {
         public let controller: ChatUserListController
 
         /// The users matching the query.
-        @Published public private(set) var users: LazyCachedMapCollection<ChatUser> = []
+        @Published public private(set) var users: [ChatUser] = []
 
         /// The current state of the Controller.
         @Published public private(set) var state: DataController.State

@@ -32,7 +32,7 @@ public class ChatUserListController: DataController, DelegateCallable, DataStore
     /// To observe changes of the users, set your class as a delegate of this controller or use the provided
     /// `Combine` publishers.
     ///
-    public var users: LazyCachedMapCollection<ChatUser> {
+    public var users: [ChatUser] {
         startUserListObserverIfNeeded()
         return userListObserver.items
     }

@@ -50,16 +50,16 @@ extension ChannelListState {
         }
 
         struct Handlers {
-            let channelsDidChange: @Sendable @MainActor (StreamCollection<ChatChannel>) async -> Void
+            let channelsDidChange: @Sendable @MainActor ([ChatChannel]) async -> Void
         }
 
-        func start(with handlers: Handlers) -> StreamCollection<ChatChannel> {
+        func start(with handlers: Handlers) -> [ChatChannel] {
             do {
                 channelListLinker.start(with: eventNotificationCenter)
                 return try channelListObserver.startObserving(didChange: handlers.channelsDidChange)
             } catch {
                 log.error("Failed to start the channel list observer for query: \(query)")
-                return StreamCollection([])
+                return []
             }
         }
     }

@@ -34,5 +34,5 @@ import Foundation
     public let query: ChannelListQuery
 
     /// An array of channels for the specified ``ChannelListQuery``.
-    @Published public internal(set) var channels = StreamCollection<ChatChannel>([])
+    @Published public internal(set) var channels: [ChatChannel] = []
 }
@@ -55,18 +55,18 @@ extension ChatState {
 
         struct Handlers {
             let channelDidChange: @Sendable @MainActor (ChatChannel?) async -> Void
-            let membersDidChange: @Sendable @MainActor (StreamCollection<ChatChannelMember>) async -> Void
-            let messagesDidChange: @Sendable @MainActor (StreamCollection<ChatMessage>) async -> Void
-            let watchersDidChange: @Sendable @MainActor (StreamCollection<ChatUser>) async -> Void
+            let membersDidChange: @Sendable @MainActor ([ChatChannelMember]) async -> Void
+            let messagesDidChange: @Sendable @MainActor ([ChatMessage]) async -> Void
+            let watchersDidChange: @Sendable @MainActor ([ChatUser]) async -> Void
         }
 
         @MainActor func start(
             with handlers: Handlers
         ) -> (
             channel: ChatChannel?,
-            members: StreamCollection<ChatChannelMember>,
-            messages: StreamCollection<ChatMessage>,
-            watchers: StreamCollection<ChatUser>
+            members: [ChatChannelMember],
+            messages: [ChatMessage],
+            watchers: [ChatUser]
         ) {
             memberListObserver = memberListState.$members
                 .dropFirst()
@@ -81,7 +81,7 @@ extension ChatState {
                 return (channel, memberListState.members, messages, watchers)
             } catch {
                 log.error("Failed to start the observers for cid: \(cid) with error \(error)")
-                return (nil, StreamCollection([]), StreamCollection([]), StreamCollection([]))
+                return (nil, [], [], [])
             }
         }
     }

@@ -59,7 +59,7 @@ import Foundation
     /// An array of loaded channel members.
     ///
     /// Use load members in ``Chat`` for loading more members.
-    @Published public private(set) var members = StreamCollection<ChatChannelMember>([])
+    @Published public private(set) var members: [ChatChannelMember] = []
 
     /// The sorting order for channel members (the default sorting is by created at in ascending order).
     public let memberSorting: [Sorting<ChannelMemberListSortingKey>]
@@ -74,7 +74,7 @@ import Foundation
     /// Messages are ordered by timestamp and ``messageOrder`` (In case of ``MessageOrdering/bottomToTop`` the list is sorted in ascending order).
     ///
     /// Use load messages in ``Chat`` for loading more messages.
-    @Published public internal(set) var messages = StreamCollection<ChatMessage>([])
+    @Published public internal(set) var messages: [ChatMessage] = []
 
     /// A Boolean value that returns whether the oldest messages have all been loaded or not.
     public var hasLoadedAllOldestMessages: Bool {
@@ -161,7 +161,7 @@ import Foundation
     /// An array of users who are currently watching the channel.
     ///
     /// Use load watchers method in ``Chat`` for populating this array.
-    @Published public internal(set) var watchers = StreamCollection<ChatUser>([])
+    @Published public internal(set) var watchers: [ChatUser] = []
 }
 
 // MARK: - Internal

@@ -153,12 +153,12 @@ extension StateLayerDatabaseObserver where ResultType == ListResult {
         )
     }
 
-    var items: StreamCollection<Item> {
-        var collection: StreamCollection<Item>!
+    var items: [Item] {
+        var collection: [Item]!
         context.performAndWait {
             // When we already have loaded items, reuse them, otherwise refetch all
             let items = reuseItems ?? updateItems(nil)
-            collection = StreamCollection(items)
+            collection = items
         }
         return collection
     }
@@ -168,7 +168,7 @@ extension StateLayerDatabaseObserver where ResultType == ListResult {
     /// - Parameter didChange: The callback which is triggered when the observed item changes. Runs on the ``MainActor``.
     ///
     /// - Returns: Returns the current state of items in the local database.
-    func startObserving(didChange: @escaping @Sendable @MainActor (StreamCollection<Item>) async -> Void) throws -> StreamCollection<Item> where Item: Sendable {
+    func startObserving(didChange: @escaping @Sendable @MainActor ([Item]) async -> Void) throws -> [Item] where Item: Sendable {
         try startObserving(onContextDidChange: { items, _ in
             Task.mainActor { await didChange(items) }
         })
@@ -181,12 +181,12 @@ extension StateLayerDatabaseObserver where ResultType == ListResult {
     /// - Note: Use it if you need to do additional processing on the context's queue.
     ///
     /// - Returns: Returns the current state of items in the local database.
-    @discardableResult func startObserving(onContextDidChange: @escaping (StreamCollection<Item>, [ListChange<Item>]) -> Void) throws -> StreamCollection<Item> {
+    @discardableResult func startObserving(onContextDidChange: @escaping ([Item], [ListChange<Item>]) -> Void) throws -> [Item] {
         changeAggregator.onDidChange = { [weak self] changes in
             guard let self else { return }
             // Runs on the NSManagedObjectContext's queue, therefore skip performAndWait
             let items = self.updateItems(changes)
-            onContextDidChange(StreamCollection(items), changes)
+            onContextDidChange(items, changes)
         }
         frc.delegate = changeAggregator
         try frc.performFetch()

@@ -18,15 +18,15 @@ extension MemberListState {
         }
 
         struct Handlers {
-            let membersDidChange: @Sendable @MainActor (StreamCollection<ChatChannelMember>) async -> Void
+            let membersDidChange: @Sendable @MainActor ([ChatChannelMember]) async -> Void
         }
 
-        func start(with handlers: Handlers) -> StreamCollection<ChatChannelMember> {
+        func start(with handlers: Handlers) -> [ChatChannelMember] {
             do {
                 return try memberListObserver.startObserving(didChange: handlers.membersDidChange)
             } catch {
                 log.error("Failed to start the member list observer with error \(error)")
-                return StreamCollection([])
+                return []
             }
         }
     }

@@ -20,5 +20,5 @@ import Foundation
     public let query: ChannelMemberListQuery
 
     /// An array of members for the specified ``ChannelMemberListQuery``.
-    @Published public private(set) var members = StreamCollection<ChatChannelMember>([])
+    @Published public private(set) var members: [ChatChannelMember] = []
 }
@@ -19,7 +19,7 @@ extension MessageSearchState {
         }
 
         struct Handlers {
-            let messagesDidChange: @Sendable @MainActor (StreamCollection<ChatMessage>) async -> Void
+            let messagesDidChange: @Sendable @MainActor ([ChatMessage]) async -> Void
         }
 
         private var handlers: Handlers?