enum MessageHistoryViewRelativeHoleDirection
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case range(start: MessageId, end: MessageId)
case aroundId(MessageId)
enum FetchMessageHistoryHoleSource
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case network(Network)
case download(Download)
fetchMessageHistoryHole
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func fetchMessageHistoryHole(accountPeerId: PeerId, source: FetchMessageHistoryHoleSource, postbox: Postbox, peerId: PeerId, namespace: MessageId.Namespace, direction: MessageHistoryViewRelativeHoleDirection, space: MessageHistoryHoleSpace, limit: Int = 100) -> Signal<Never, NoError> {
return postbox.stateView()
|> mapToSignal { view -> Signal<AuthorizedAccountState, NoError> in
if let state = view.state as? AuthorizedAccountState {
return .single(state)
} else {
return .complete()
}
}
|> take(1)
|> mapToSignal { _ -> Signal<Never, NoError> in
return postbox.loadedPeerWithId(peerId)
|> take(1)
|> mapToSignal { peer in
if let inputPeer = forceApiInputPeer(peer) {
print("fetchMessageHistoryHole for \(peer.debugDisplayTitle) \(direction) space \(space)")
Logger.shared.log("fetchMessageHistoryHole", "fetch for \(peer.debugDisplayTitle) \(direction) space \(space)")
let request: Signal<Api.messages.Messages, MTRpcError>
var implicitelyFillHole = false
let minMaxRange: ClosedRange<MessageId.Id>
switch space {
case .everywhere:
let offsetId: Int32
let addOffset: Int32
let selectedLimit = limit
let maxId: Int32
let minId: Int32
switch direction {
case let .range(start, end):
if start.id <= end.id {
offsetId = start.id <= 1 ? 1 : (start.id - 1)
addOffset = Int32(-selectedLimit)
maxId = end.id
minId = start.id - 1
let rangeStartId = start.id
let rangeEndId = min(end.id, Int32.max - 1)
if rangeStartId <= rangeEndId {
minMaxRange = rangeStartId ... rangeEndId
} else {
minMaxRange = rangeStartId ... rangeStartId
assertionFailure()
}
} else {
offsetId = start.id == Int32.max ? start.id : (start.id + 1)
addOffset = 0
maxId = start.id == Int32.max ? start.id : (start.id + 1)
minId = end.id
let rangeStartId = end.id
let rangeEndId = min(start.id, Int32.max - 1)
if rangeStartId <= rangeEndId {
minMaxRange = rangeStartId ... rangeEndId
} else {
minMaxRange = rangeStartId ... rangeStartId
assertionFailure()
}
}
case let .aroundId(id):
offsetId = id.id
addOffset = Int32(-selectedLimit / 2)
maxId = Int32.max
minId = 1
minMaxRange = 1 ... Int32.max - 1
}
/// Api.functions.messages.getHistory
request = source.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: offsetId, offsetDate: 0, addOffset: addOffset, limit: Int32(selectedLimit), maxId: maxId, minId: minId, hash: 0))
case let .tag(tag):
assert(tag.containsSingleElement)
if tag == .unseenPersonalMessage {
let offsetId: Int32
let addOffset: Int32
let selectedLimit = limit
let maxId: Int32
let minId: Int32
switch direction {
case let .range(start, end):
if start.id <= end.id {
offsetId = start.id <= 1 ? 1 : (start.id - 1)
addOffset = Int32(-selectedLimit)
maxId = end.id
minId = start.id - 1
let rangeStartId = start.id
let rangeEndId = min(end.id, Int32.max - 1)
if rangeStartId <= rangeEndId {
minMaxRange = rangeStartId ... rangeEndId
} else {
minMaxRange = rangeStartId ... rangeStartId
assertionFailure()
}
} else {
offsetId = start.id == Int32.max ? start.id : (start.id + 1)
addOffset = 0
maxId = start.id == Int32.max ? start.id : (start.id + 1)
minId = end.id
let rangeStartId = end.id
let rangeEndId = min(start.id, Int32.max - 1)
if rangeStartId <= rangeEndId {
minMaxRange = rangeStartId ... rangeEndId
} else {
minMaxRange = rangeStartId ... rangeStartId
assertionFailure()
}
}
case let .aroundId(id):
offsetId = id.id
addOffset = Int32(-selectedLimit / 2)
maxId = Int32.max
minId = 1
minMaxRange = 1 ... Int32.max - 1
}
// Api.functions.messages.getUnreadMentions
request = source.request(Api.functions.messages.getUnreadMentions(peer: inputPeer, offsetId: offsetId, addOffset: addOffset, limit: Int32(selectedLimit), maxId: maxId, minId: minId))
} else if tag == .liveLocation {
let selectedLimit = limit
switch direction {
case .aroundId, .range:
implicitelyFillHole = true
}
minMaxRange = 1 ... (Int32.max - 1)
// Api.functions.messages.getRecentLocations
request = source.request(Api.functions.messages.getRecentLocations(peer: inputPeer, limit: Int32(selectedLimit), hash: 0))
} else if let filter = messageFilterForTagMask(tag) {
let offsetId: Int32
let addOffset: Int32
let selectedLimit = limit
let maxId: Int32
let minId: Int32
switch direction {
case let .range(start, end):
if start.id <= end.id {
offsetId = start.id <= 1 ? 1 : (start.id - 1)
addOffset = Int32(-selectedLimit)
maxId = end.id
minId = start.id - 1
let rangeStartId = start.id
let rangeEndId = min(end.id, Int32.max - 1)
if rangeStartId <= rangeEndId {
minMaxRange = rangeStartId ... rangeEndId
} else {
minMaxRange = rangeStartId ... rangeStartId
assertionFailure()
}
} else {
offsetId = start.id == Int32.max ? start.id : (start.id + 1)
addOffset = 0
maxId = start.id == Int32.max ? start.id : (start.id + 1)
minId = end.id
let rangeStartId = end.id
let rangeEndId = min(start.id, Int32.max - 1)
if rangeStartId <= rangeEndId {
minMaxRange = rangeStartId ... rangeEndId
} else {
minMaxRange = rangeStartId ... rangeStartId
assertionFailure()
}
}
case let .aroundId(id):
offsetId = id.id
addOffset = Int32(-selectedLimit / 2)
maxId = Int32.max
minId = 1
minMaxRange = 1 ... (Int32.max - 1)
}
// Api.functions.messages.search
request = source.request(Api.functions.messages.search(flags: 0, peer: inputPeer, q: "", fromId: nil, filter: filter, minDate: 0, maxDate: 0, offsetId: offsetId, addOffset: addOffset, limit: Int32(selectedLimit), maxId: maxId, minId: minId, hash: 0))
} else {
assertionFailure()
minMaxRange = 1 ... 1
request = .never()
}
}
return request
|> retryRequest
|> mapToSignal { result -> Signal<Never, NoError> in
let messages: [Api.Message]
let chats: [Api.Chat]
let users: [Api.User]
var channelPts: Int32?
switch result {
case let .messages(messages: apiMessages, chats: apiChats, users: apiUsers):
messages = apiMessages
chats = apiChats
users = apiUsers
case let .messagesSlice(_, _, _, messages: apiMessages, chats: apiChats, users: apiUsers):
messages = apiMessages
chats = apiChats
users = apiUsers
case let .channelMessages(_, pts, _, apiMessages, apiChats, apiUsers):
messages = apiMessages
chats = apiChats
users = apiUsers
channelPts = pts
case .messagesNotModified:
messages = []
chats = []
users = []
}
var peers: [Peer] = []
var peerPresences: [PeerId: PeerPresence] = [:]
for chat in chats {
if let groupOrChannel = parseTelegramGroupOrChannel(chat: chat) {
peers.append(groupOrChannel)
}
}
for user in users {
let telegramUser = TelegramUser(user: user)
peers.append(telegramUser)
if let presence = TelegramUserPresence(apiUser: user) {
peerPresences[telegramUser.id] = presence
}
}
var storeMessages: [StoreMessage] = []
for message in messages {
if let storeMessage = StoreMessage(apiMessage: message, namespace: namespace) {
if let channelPts = channelPts {
var attributes = storeMessage.attributes
attributes.append(ChannelMessageStateVersionAttribute(pts: channelPts))
storeMessages.append(storeMessage.withUpdatedAttributes(attributes))
} else {
storeMessages.append(storeMessage)
}
}
}
return withResolvedAssociatedMessages(postbox: postbox, source: source, peers: Dictionary(peers.map({ ($0.id, $0) }), uniquingKeysWith: { lhs, _ in lhs }), storeMessages: storeMessages, { transaction, additionalPeers, additionalMessages in
// addMessages location: .Random
let _ = transaction.addMessages(storeMessages, location: .Random)
let _ = transaction.addMessages(additionalMessages, location: .Random)
let filledRange: ClosedRange<MessageId.Id>
let ids = messages.compactMap({ $0.id()?.id })
if ids.count == 0 || implicitelyFillHole {
filledRange = minMaxRange
} else {
let messageRange = ids.min()! ... ids.max()!
switch direction {
case let .aroundId(aroundId):
filledRange = min(aroundId.id, messageRange.lowerBound) ... max(aroundId.id, messageRange.upperBound)
case let .range(start, end):
if start.id <= end.id {
let minBound = start.id
let maxBound = messageRange.upperBound
filledRange = min(minBound, maxBound) ... max(minBound, maxBound)
} else {
let minBound = messageRange.lowerBound
let maxBound = start.id
filledRange = min(minBound, maxBound) ... max(minBound, maxBound)
}
}
}
// remove message hole in filledRange
transaction.removeHole(peerId: peerId, namespace: namespace, space: space, range: filledRange)
// update peers
updatePeers(transaction: transaction, peers: peers + additionalPeers, update: { _, updated -> Peer in
return updated
})
// update peer presences
updatePeerPresences(transaction: transaction, accountPeerId: accountPeerId, peerPresences: peerPresences)
print("fetchMessageHistoryHole for \(peer.debugDisplayTitle) space \(space) done")
return
})
}
} else {
return .complete()
}
}
}
}
withResolvedAssociatedMessages
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func withResolvedAssociatedMessages(postbox: Postbox, source: FetchMessageHistoryHoleSource, peers: [PeerId: Peer], storeMessages: [StoreMessage], _ f: @escaping (Transaction, [Peer], [StoreMessage]) -> Void) -> Signal<Never, NoError> {
return postbox.transaction { transaction -> Signal<Never, NoError> in
var storedIds = Set<MessageId>()
var referencedIds = Set<MessageId>()
for message in storeMessages {
guard case let .Id(id) = message.id else {
continue
}
storedIds.insert(id)
for attribute in message.attributes {
referencedIds.formUnion(attribute.associatedMessageIds)
}
}
referencedIds.subtract(storedIds)
referencedIds.subtract(transaction.filterStoredMessageIds(referencedIds))
if referencedIds.isEmpty {
f(transaction, [], [])
return .complete()
} else {
var signals: [Signal<([Api.Message], [Api.Chat], [Api.User]), NoError>] = []
for (peerId, messageIds) in messagesIdsGroupedByPeerId(referencedIds) {
if let peer = transaction.getPeer(peerId) ?? peers[peerId] {
var signal: Signal<Api.messages.Messages, MTRpcError>?
if peerId.namespace == Namespaces.Peer.CloudUser || peerId.namespace == Namespaces.Peer.CloudGroup {
// Api.functions.messages.getMessages
signal = source.request(Api.functions.messages.getMessages(id: messageIds.map({ Api.InputMessage.inputMessageID(id: $0.id) })))
} else if peerId.namespace == Namespaces.Peer.CloudChannel {
if let inputChannel = apiInputChannel(peer) {
// Api.functions.channels.getMessages
signal = source.request(Api.functions.channels.getMessages(channel: inputChannel, id: messageIds.map({ Api.InputMessage.inputMessageID(id: $0.id) })))
}
}
if let signal = signal {
signals.append(signal
|> map { result in
switch result {
case let .messages(messages, chats, users):
return (messages, chats, users)
case let .messagesSlice(_, _, _, messages, chats, users):
return (messages, chats, users)
case let .channelMessages(_, _, _, messages, chats, users):
return (messages, chats, users)
case .messagesNotModified:
return ([], [], [])
}
}
|> `catch` { _ in
return Signal<([Api.Message], [Api.Chat], [Api.User]), NoError>.single(([], [], []))
})
}
}
}
let fetchMessages = combineLatest(signals)
return fetchMessages
|> mapToSignal { results -> Signal<Never, NoError> in
var additionalPeers: [Peer] = []
var additionalMessages: [StoreMessage] = []
for (messages, chats, users) in results {
if !messages.isEmpty {
for message in messages {
if let message = StoreMessage(apiMessage: message) {
additionalMessages.append(message)
}
}
}
for chat in chats {
if let peer = parseTelegramGroupOrChannel(chat: chat) {
additionalPeers.append(peer)
}
}
for user in users {
additionalPeers.append(TelegramUser(user: user))
}
}
return postbox.transaction { transaction -> Void in
f(transaction, additionalPeers, additionalMessages)
}
|> ignoreValues
}
}
}
|> switchToLatest
}