Add SwiftUI iOS app shell

apps/ios/TeleTuiIOS/Sources/TeleTuiIOSCore/ViewModels.swift

@@ -0,0 +1,203 @@
+import Foundation
+import Combine
+
+@MainActor
+public final class SessionStore: ObservableObject {
+    @Published public private(set) var account: Account
+    @Published public private(set) var authState: AuthState = .waitTdlibParameters
+    @Published public private(set) var networkState: NetworkState = .ready
+    @Published public private(set) var errorMessage: String?
+
+    public let bridge: SessionBridge
+
+    public init(account: Account, bridge: SessionBridge) {
+        self.account = account
+        self.bridge = bridge
+    }
+
+    public func refreshAuthState() async {
+        do {
+            authState = try await bridge.authState()
+            errorMessage = nil
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+
+    public func apply(events: [SessionEvent]) {
+        for event in events {
+            if case let .authChanged(state) = event {
+                authState = state
+            }
+        }
+    }
+}
+
+@MainActor
+public final class AuthViewModel: ObservableObject {
+    @Published public var phone = ""
+    @Published public var code = ""
+    @Published public var password = ""
+    @Published public private(set) var isLoading = false
+    @Published public private(set) var errorMessage: String?
+
+    private let store: SessionStore
+
+    public init(store: SessionStore) {
+        self.store = store
+    }
+
+    public func submitCurrentStep() async {
+        isLoading = true
+        defer { isLoading = false }
+
+        do {
+            switch store.authState {
+            case .waitPhoneNumber:
+                try await store.bridge.sendPhoneNumber(phone)
+            case .waitCode:
+                try await store.bridge.sendCode(code)
+            case .waitPassword:
+                try await store.bridge.sendPassword(password)
+            default:
+                break
+            }
+            let events = try await store.bridge.pollEvents()
+            store.apply(events: events)
+            errorMessage = nil
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+}
+
+@MainActor
+public final class ChatListViewModel: ObservableObject {
+    @Published public private(set) var folders: [Folder] = []
+    @Published public private(set) var chats: [ChatSummary] = []
+    @Published public var selectedFolderId: Int32?
+    @Published public var searchText = ""
+    @Published public private(set) var isLoading = false
+    @Published public private(set) var errorMessage: String?
+
+    private let bridge: SessionBridge
+
+    public init(bridge: SessionBridge) {
+        self.bridge = bridge
+    }
+
+    public var filteredChats: [ChatSummary] {
+        guard !searchText.isEmpty else {
+            return chats
+        }
+        return chats.filter { chat in
+            chat.title.localizedCaseInsensitiveContains(searchText)
+                || (chat.username?.localizedCaseInsensitiveContains(searchText) ?? false)
+        }
+    }
+
+    public func load() async {
+        isLoading = true
+        defer { isLoading = false }
+
+        do {
+            folders = try await bridge.loadFolders()
+            chats = try await bridge.loadChats(folderId: selectedFolderId)
+            errorMessage = nil
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+}
+
+@MainActor
+public final class ChatViewModel: ObservableObject {
+    @Published public private(set) var chat: ChatSummary
+    @Published public private(set) var messages: [Message] = []
+    @Published public var composeText: String
+    @Published public var replyTo: Message?
+    @Published public private(set) var isLoading = false
+    @Published public private(set) var errorMessage: String?
+
+    private let bridge: SessionBridge
+
+    public init(chat: ChatSummary, bridge: SessionBridge) {
+        self.chat = chat
+        self.bridge = bridge
+        self.composeText = chat.draft?.text ?? ""
+    }
+
+    public func load() async {
+        isLoading = true
+        defer { isLoading = false }
+
+        do {
+            messages = try await bridge.loadHistory(chatId: chat.id)
+            errorMessage = nil
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+
+    public func send() async {
+        let text = composeText.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !text.isEmpty else {
+            return
+        }
+
+        do {
+            let sent = try await bridge.sendMessage(
+                chatId: chat.id,
+                text: text,
+                replyToMessageId: replyTo?.id
+            )
+            messages.append(sent)
+            composeText = ""
+            replyTo = nil
+            errorMessage = nil
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+}
+
+@MainActor
+public final class ProfileViewModel: ObservableObject {
+    @Published public private(set) var profile: Profile?
+    @Published public private(set) var isLoading = false
+    @Published public private(set) var errorMessage: String?
+
+    private let bridge: SessionBridge
+
+    public init(bridge: SessionBridge) {
+        self.bridge = bridge
+    }
+
+    public func load(chatId: Int64) async {
+        isLoading = true
+        defer { isLoading = false }
+
+        do {
+            profile = try await bridge.openProfile(chatId: chatId)
+            errorMessage = nil
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+}
+
+@MainActor
+public final class MediaViewModel: ObservableObject {
+    @Published public private(set) var activePhotoPath: String?
+    @Published public private(set) var activeVoicePath: String?
+
+    public init() {}
+
+    public func showPhoto(path: String) {
+        activePhotoPath = path
+    }
+
+    public func showVoice(path: String) {
+        activeVoicePath = path
+    }
+}