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| 1 | +import ChatService |
| 2 | +import ComposableArchitecture |
| 3 | +import Foundation |
| 4 | +import OpenAIService |
| 5 | +import Preferences |
| 6 | + |
| 7 | +public struct ChatMessage: Equatable { |
| 8 | + public enum Role { |
| 9 | + case user |
| 10 | + case assistant |
| 11 | + case function |
| 12 | + case ignored |
| 13 | + } |
| 14 | + |
| 15 | + public var id: String |
| 16 | + public var role: Role |
| 17 | + public var text: String |
| 18 | + |
| 19 | + public init(id: String, role: Role, text: String) { |
| 20 | + self.id = id |
| 21 | + self.role = role |
| 22 | + self.text = text |
| 23 | + } |
| 24 | +} |
| 25 | + |
| 26 | +struct Chat: ReducerProtocol { |
| 27 | + public typealias MessageID = String |
| 28 | + |
| 29 | + struct State: Equatable { |
| 30 | + var title: String = "Chat" |
| 31 | + @BindingState var typedMessage = "" |
| 32 | + var history: [ChatMessage] = [] |
| 33 | + @BindingState var isReceivingMessage = false |
| 34 | + var chatMenu = ChatMenu.State() |
| 35 | + } |
| 36 | + |
| 37 | + enum Action: Equatable, BindableAction { |
| 38 | + case binding(BindingAction<State>) |
| 39 | + |
| 40 | + case appear |
| 41 | + case sendButtonTapped |
| 42 | + case returnButtonTapped |
| 43 | + case stopRespondingButtonTapped |
| 44 | + case clearButtonTap |
| 45 | + case deleteMessageButtonTapped(MessageID) |
| 46 | + case resendMessageButtonTapped(MessageID) |
| 47 | + case setAsExtraPromptButtonTapped(MessageID) |
| 48 | + |
| 49 | + case observeChatService |
| 50 | + case observeHistoryChange |
| 51 | + case observeIsReceivingMessageChange |
| 52 | + case observeSystemPromptChange |
| 53 | + case observeExtraSystemPromptChange |
| 54 | + |
| 55 | + case historyChanged |
| 56 | + case isReceivingMessageChanged |
| 57 | + case systemPromptChanged |
| 58 | + case extraSystemPromptChanged |
| 59 | + |
| 60 | + case chatMenu(ChatMenu.Action) |
| 61 | + } |
| 62 | + |
| 63 | + let service: ChatService |
| 64 | + let id = UUID() |
| 65 | + |
| 66 | + enum CancelID: Hashable { |
| 67 | + case observeHistoryChange(UUID) |
| 68 | + case observeIsReceivingMessageChange(UUID) |
| 69 | + case observeSystemPromptChange(UUID) |
| 70 | + case observeExtraSystemPromptChange(UUID) |
| 71 | + } |
| 72 | + |
| 73 | + var body: some ReducerProtocol<State, Action> { |
| 74 | + BindingReducer() |
| 75 | + |
| 76 | + Scope(state: \.chatMenu, action: /Action.chatMenu) { |
| 77 | + ChatMenu(service: service) |
| 78 | + } |
| 79 | + |
| 80 | + Reduce { state, action in |
| 81 | + switch action { |
| 82 | + case .appear: |
| 83 | + return .run { send in |
| 84 | + await send(.observeChatService) |
| 85 | + await send(.historyChanged) |
| 86 | + await send(.isReceivingMessageChanged) |
| 87 | + await send(.systemPromptChanged) |
| 88 | + await send(.extraSystemPromptChanged) |
| 89 | + } |
| 90 | + |
| 91 | + case .sendButtonTapped: |
| 92 | + guard !state.typedMessage.isEmpty else { return .none } |
| 93 | + let message = state.typedMessage |
| 94 | + state.typedMessage = "" |
| 95 | + return .run { _ in |
| 96 | + try await service.send(content: message) |
| 97 | + } |
| 98 | + |
| 99 | + case .returnButtonTapped: |
| 100 | + state.typedMessage += "\n" |
| 101 | + return .none |
| 102 | + |
| 103 | + case .stopRespondingButtonTapped: |
| 104 | + return .run { _ in |
| 105 | + await service.stopReceivingMessage() |
| 106 | + } |
| 107 | + |
| 108 | + case .clearButtonTap: |
| 109 | + return .run { _ in |
| 110 | + await service.clearHistory() |
| 111 | + } |
| 112 | + |
| 113 | + case let .deleteMessageButtonTapped(id): |
| 114 | + return .run { _ in |
| 115 | + await service.deleteMessage(id: id) |
| 116 | + } |
| 117 | + |
| 118 | + case let .resendMessageButtonTapped(id): |
| 119 | + return .run { _ in |
| 120 | + try await service.resendMessage(id: id) |
| 121 | + } |
| 122 | + |
| 123 | + case let .setAsExtraPromptButtonTapped(id): |
| 124 | + return .run { _ in |
| 125 | + await service.setMessageAsExtraPrompt(id: id) |
| 126 | + } |
| 127 | + |
| 128 | + case .observeChatService: |
| 129 | + return .run { send in |
| 130 | + await send(.observeHistoryChange) |
| 131 | + await send(.observeIsReceivingMessageChange) |
| 132 | + await send(.observeSystemPromptChange) |
| 133 | + await send(.observeExtraSystemPromptChange) |
| 134 | + } |
| 135 | + |
| 136 | + case .observeHistoryChange: |
| 137 | + return .run { send in |
| 138 | + let stream = AsyncStream<Void> { continuation in |
| 139 | + let cancellable = service.$chatHistory.sink { _ in |
| 140 | + continuation.yield() |
| 141 | + } |
| 142 | + continuation.onTermination = { _ in |
| 143 | + cancellable.cancel() |
| 144 | + } |
| 145 | + } |
| 146 | + for await _ in stream { |
| 147 | + await send(.historyChanged) |
| 148 | + } |
| 149 | + }.cancellable(id: CancelID.observeHistoryChange(id), cancelInFlight: true) |
| 150 | + |
| 151 | + case .observeIsReceivingMessageChange: |
| 152 | + return .run { send in |
| 153 | + let stream = AsyncStream<Void> { continuation in |
| 154 | + let cancellable = service.$isReceivingMessage |
| 155 | + .sink { _ in |
| 156 | + continuation.yield() |
| 157 | + } |
| 158 | + continuation.onTermination = { _ in |
| 159 | + cancellable.cancel() |
| 160 | + } |
| 161 | + } |
| 162 | + for await _ in stream { |
| 163 | + await send(.isReceivingMessageChanged) |
| 164 | + } |
| 165 | + }.cancellable( |
| 166 | + id: CancelID.observeIsReceivingMessageChange(id), |
| 167 | + cancelInFlight: true |
| 168 | + ) |
| 169 | + |
| 170 | + case .observeSystemPromptChange: |
| 171 | + return .run { send in |
| 172 | + let stream = AsyncStream<Void> { continuation in |
| 173 | + let cancellable = service.$systemPrompt.sink { _ in |
| 174 | + continuation.yield() |
| 175 | + } |
| 176 | + continuation.onTermination = { _ in |
| 177 | + cancellable.cancel() |
| 178 | + } |
| 179 | + } |
| 180 | + for await _ in stream { |
| 181 | + await send(.systemPromptChanged) |
| 182 | + } |
| 183 | + }.cancellable(id: CancelID.observeSystemPromptChange(id), cancelInFlight: true) |
| 184 | + |
| 185 | + case .observeExtraSystemPromptChange: |
| 186 | + return .run { send in |
| 187 | + let stream = AsyncStream<Void> { continuation in |
| 188 | + let cancellable = service.$extraSystemPrompt |
| 189 | + .sink { _ in |
| 190 | + continuation.yield() |
| 191 | + } |
| 192 | + continuation.onTermination = { _ in |
| 193 | + cancellable.cancel() |
| 194 | + } |
| 195 | + } |
| 196 | + for await _ in stream { |
| 197 | + await send(.extraSystemPromptChanged) |
| 198 | + } |
| 199 | + }.cancellable(id: CancelID.observeExtraSystemPromptChange(id), cancelInFlight: true) |
| 200 | + |
| 201 | + case .historyChanged: |
| 202 | + state.history = service.chatHistory.map { message in |
| 203 | + .init( |
| 204 | + id: message.id, |
| 205 | + role: { |
| 206 | + switch message.role { |
| 207 | + case .system: return .ignored |
| 208 | + case .user: return .user |
| 209 | + case .assistant: |
| 210 | + if let text = message.summary ?? message.content, |
| 211 | + !text.isEmpty |
| 212 | + { |
| 213 | + return .assistant |
| 214 | + } |
| 215 | + return .ignored |
| 216 | + case .function: return .function |
| 217 | + } |
| 218 | + }(), |
| 219 | + text: message.summary ?? message.content ?? "" |
| 220 | + ) |
| 221 | + } |
| 222 | + |
| 223 | + state.title = { |
| 224 | + let defaultTitle = "Chat" |
| 225 | + guard let lastMessageText = state.history |
| 226 | + .filter({ $0.role == .assistant || $0.role == .user }) |
| 227 | + .last? |
| 228 | + .text else { return defaultTitle } |
| 229 | + if lastMessageText.isEmpty { return defaultTitle } |
| 230 | + let trimmed = lastMessageText |
| 231 | + .trimmingCharacters(in: .punctuationCharacters) |
| 232 | + .trimmingCharacters(in: .whitespacesAndNewlines) |
| 233 | + if trimmed.starts(with: "```") { |
| 234 | + return "Code Block" |
| 235 | + } else { |
| 236 | + return trimmed |
| 237 | + } |
| 238 | + }() |
| 239 | + return .none |
| 240 | + |
| 241 | + case .isReceivingMessageChanged: |
| 242 | + state.isReceivingMessage = service.isReceivingMessage |
| 243 | + return .none |
| 244 | + |
| 245 | + case .systemPromptChanged: |
| 246 | + state.chatMenu.systemPrompt = service.systemPrompt |
| 247 | + return .none |
| 248 | + |
| 249 | + case .extraSystemPromptChanged: |
| 250 | + state.chatMenu.extraSystemPrompt = service.extraSystemPrompt |
| 251 | + return .none |
| 252 | + |
| 253 | + case .binding: |
| 254 | + return .none |
| 255 | + |
| 256 | + case .chatMenu: |
| 257 | + return .none |
| 258 | + } |
| 259 | + } |
| 260 | + } |
| 261 | +} |
| 262 | + |
| 263 | +struct ChatMenu: ReducerProtocol { |
| 264 | + struct State: Equatable { |
| 265 | + var systemPrompt: String = "" |
| 266 | + var extraSystemPrompt: String = "" |
| 267 | + var temperatureOverride: Double? = nil |
| 268 | + var chatModelIdOverride: String? = nil |
| 269 | + } |
| 270 | + |
| 271 | + enum Action: Equatable { |
| 272 | + case appear |
| 273 | + case resetPromptButtonTapped |
| 274 | + case temperatureOverrideSelected(Double?) |
| 275 | + case chatModelIdOverrideSelected(String?) |
| 276 | + case customCommandButtonTapped(CustomCommand) |
| 277 | + } |
| 278 | + |
| 279 | + let service: ChatService |
| 280 | + |
| 281 | + var body: some ReducerProtocol<State, Action> { |
| 282 | + Reduce { state, action in |
| 283 | + switch action { |
| 284 | + case .appear: |
| 285 | + state.temperatureOverride = service.configuration.overriding.temperature |
| 286 | + state.chatModelIdOverride = service.configuration.overriding.modelId |
| 287 | + return .none |
| 288 | + |
| 289 | + case .resetPromptButtonTapped: |
| 290 | + return .run { _ in |
| 291 | + await service.resetPrompt() |
| 292 | + } |
| 293 | + case let .temperatureOverrideSelected(temperature): |
| 294 | + state.temperatureOverride = temperature |
| 295 | + return .run { _ in |
| 296 | + service.configuration.overriding.temperature = temperature |
| 297 | + } |
| 298 | + case let .chatModelIdOverrideSelected(chatModelId): |
| 299 | + state.chatModelIdOverride = chatModelId |
| 300 | + return .run { _ in |
| 301 | + service.configuration.overriding.modelId = chatModelId |
| 302 | + } |
| 303 | + case let .customCommandButtonTapped(command): |
| 304 | + return .run { _ in |
| 305 | + try await service.handleCustomCommand(command) |
| 306 | + } |
| 307 | + } |
| 308 | + } |
| 309 | + } |
| 310 | +} |
| 311 | + |
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