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import Defaults
import Foundation
import Integration
import DependencyInjection
protocol ChatListViewModelType {
var myId: Data { get }
var username: String { get }
var editState: EditStateHandler { get }
var searchQueryRelay: CurrentValueSubject<String, Never> { get }
var chatsRelay: CurrentValueSubject<[GenericChatInfo], Never> { get }
var isOnline: AnyPublisher<Bool, Never> { get }
var badgeCount: AnyPublisher<Int, Never> { get }
func delete(indexPaths: [IndexPath]?)
}
final class ChatListViewModel: ChatListViewModelType {
@Dependency private var session: SessionType
@KeyObject(.username, defaultValue: "") var myUsername: String
let editState = EditStateHandler()
let chatsRelay = CurrentValueSubject<[GenericChatInfo], Never>([])
let searchQueryRelay = CurrentValueSubject<String, Never>("")
private var cancellables = Set<AnyCancellable>()
var hud: AnyPublisher<HUDStatus, Never> { hudRelay.eraseToAnyPublisher() }
private let hudRelay = CurrentValueSubject<HUDStatus, Never>(.none)
var badgeCount: AnyPublisher<Int, Never> {
Publishers.CombineLatest(
session.contacts(.received),
session.groups(.pending)
).map { $0.0.count + $0.1.count }
.eraseToAnyPublisher()
}
var isOnline: AnyPublisher<Bool, Never> { session.isOnline }
var myId: Data { session.myId }
var username: String { myUsername }
init() {
let searchStream = searchQueryRelay
.removeDuplicates()
.debounce(for: .milliseconds(100), scheduler: DispatchQueue.main)
.eraseToAnyPublisher()
Publishers.CombineLatest3(
session.singleChats(.all),
session.groupChats(.accepted),
searchStream
).map { data -> [GenericChatInfo] in
let singles = data.0
let groupies = data.1
let searched = data.2
var generics = [GenericChatInfo]()
for single in singles {
generics.append(
GenericChatInfo(
contact: single.contact,
groupInfo: nil,
latestE2EMessage: single.lastMessage
)
)
}
for group in groupies {
generics.append(
GenericChatInfo(
contact: nil,
groupInfo: group,
latestE2EMessage: nil
)
)
}
if !searched.isEmpty {
generics = generics.filter { filtering in
if let contact = filtering.contact {
let username = contact.username.lowercased().contains(searched.lowercased())
let nickname = contact.nickname?.lowercased().contains(searched.lowercased()) ?? false
let lastMessage = filtering.latestE2EMessage?.payload.text.lowercased().contains(searched.lowercased()) ?? false
return username || nickname || lastMessage
} else {
if let group = filtering.groupInfo?.group {
let name = group.name.lowercased().contains(searched.lowercased())
let last = filtering.groupInfo?.lastMessage?.payload.text.lowercased().contains(searched.lowercased()) ?? false
return name || last
}
}
return false
}
}
#warning("TODO: Use enum to differentiate chats")
return generics.sorted { infoA, infoB in
if let singleA = infoA.latestE2EMessage {
if let singleB = infoB.latestE2EMessage {
/// aSingle bSingle
return singleA.timestamp > singleB.timestamp
} else {
/// aSingle bGroup
let groupB = infoB.groupInfo!
if let lastGM = groupB.lastMessage {
/// aSingle bGroup w/ message
return singleA.timestamp > lastGM.timestamp
} else {
/// aSingle bGroup w/out message
return true
}
}
} else {
let groupA = infoA.groupInfo!
if let lastGM = groupA.lastMessage {
/// aGroup w/ message
if let singleB = infoB.latestE2EMessage {
/// aGroup w/ message bSingle
return lastGM.timestamp > singleB.timestamp
} else {
let groupB = infoB.groupInfo!
/// aGroup w/ message bGroup
if let lastGM2 = groupB.lastMessage {
return lastGM.timestamp > lastGM2.timestamp
} else {
return true
}
}
} else {
/// aGroup w/out message b?
return false
}
}
}
}.sink { [unowned self] in chatsRelay.send($0) }
.store(in: &cancellables)
}
func isGroup(indexPath: IndexPath) -> Bool {
chatsRelay.value[indexPath.row].contact == nil
}
func deleteAndLeaveGroupFrom(indexPath: IndexPath) {
guard let group = chatsRelay.value[indexPath.row].groupInfo?.group else {
fatalError("Tried to delete a group from an index path that is not one")
}
do {
try session.leave(group: group)
hudRelay.send(.none)
} catch {
hudRelay.send(.error(.init(with: error)))
}
}
func delete(indexPaths: [IndexPath]?) {
guard let selectedIndexPaths = indexPaths else {
let contacts = chatsRelay.value.compactMap { $0.contact }
let groups = chatsRelay.value.compactMap { $0.groupInfo?.group }
groups.forEach(session.deleteAll(from:))
contacts.forEach(session.deleteAll(from:))
return
}
let contacts = selectedIndexPaths.compactMap { chatsRelay.value[$0.row].contact }
let groups = selectedIndexPaths.compactMap { chatsRelay.value[$0.row].groupInfo?.group }
groups.forEach(session.deleteAll(from:))
contacts.forEach(session.deleteAll(from:))
}
}