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Caching the room proxies and their messages. Improved performance throughout.

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This commit is contained in:
Stefan Ceriu
2022-03-31 15:37:52 +03:00
parent b50bf724a3
commit 49f7678ce8
22 changed files with 191 additions and 189 deletions
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ElementX/Sources/Screens/HomeScreen/HomeScreenViewModel.swift
+32 -31
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@@ -67,7 +67,7 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
self.roomList = roomList
state.rooms = roomList.map { roomProxy in
roomFromProxy(roomProxy)
buildRoomFromProxy(roomProxy)
}
roomUpdateListeners.removeAll()
@@ -75,10 +75,8 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
roomList.forEach({ roomProxy in
roomProxy.callbacks.sink { [weak self] callback in
switch callback {
case .updatedLastMessage:
case .updatedMessages:
self?.loadLastMessageForRoomWithIdentifier(roomProxy.id)
default:
break
}
}
.store(in: &roomUpdateListeners)
@@ -92,9 +90,19 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
// MARK: - Private
private func loadRoomDataForIdentifier(_ roomIdentifier: String) {
loadAvatarForRoomWithIdentifier(roomIdentifier)
loadRoomDisplayNameForRoomWithIdentifier(roomIdentifier)
loadLastMessageForRoomWithIdentifier(roomIdentifier)
let room = state.rooms.first(where: { $0.id == roomIdentifier })
if room?.avatar == nil {
loadAvatarForRoomWithIdentifier(roomIdentifier)
}
if room?.displayName == nil {
loadRoomDisplayNameForRoomWithIdentifier(roomIdentifier)
}
if room?.lastMessage == nil {
loadLastMessageForRoomWithIdentifier(roomIdentifier)
}
}
private func loadAvatarForRoomWithIdentifier(_ roomIdentifier: String) {
@@ -149,22 +157,12 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
return
}
if let lastMessage = room.lastMessage {
self.updateLastMessage(lastMessage, forRoomWithIdentifier: roomIdentifier)
} else {
room.paginateBackwards(count: 1) { result in
switch result {
case .success(let messages):
guard let lastMessage = messages.last else {
return
}
self.updateLastMessage(lastMessage.body, forRoomWithIdentifier: roomIdentifier)
default:
break
}
}
if let lastMessage = room.messages.last {
self.updateLastMessage(lastMessage.body, forRoomWithIdentifier: roomIdentifier)
return
}
room.paginateBackwards(count: 1, callback: nil)
}
private func updateLastMessage(_ lastMessage: String, forRoomWithIdentifier roomIdentifier: String) {
@@ -174,15 +172,18 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
self.state.rooms[index].lastMessage = lastMessage
}
private func buildRoomFromProxy(_ roomProxy: RoomProxyProtocol) -> HomeScreenRoom {
let avatar = mediaProvider.imageForURL(roomProxy.avatarURL)
private func roomFromProxy(_ roomProxy: RoomProxyProtocol) -> HomeScreenRoom {
HomeScreenRoom(id: roomProxy.id,
displayName: roomProxy.name,
topic: roomProxy.topic,
lastMessage: roomProxy.lastMessage,
isDirect: roomProxy.isDirect,
isEncrypted: roomProxy.isEncrypted,
isSpace: roomProxy.isSpace,
isTombstoned: roomProxy.isTombstoned)
return HomeScreenRoom(id: roomProxy.id,
displayName: roomProxy.name,
topic: roomProxy.topic,
lastMessage: roomProxy.messages.last?.body,
avatar: avatar,
isDirect: roomProxy.isDirect,
isEncrypted: roomProxy.isEncrypted,
isSpace: roomProxy.isSpace,
isTombstoned: roomProxy.isTombstoned)
}
}