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| 1 | +import Setapp |
| 2 | +import SetappAI |
| 3 | +import SwiftUI |
| 4 | +import Combine |
| 5 | + |
| 6 | +// MARK: - Message Model |
| 7 | + |
| 8 | +struct ChatMessage: Identifiable, Equatable, Codable { |
| 9 | + let id: String |
| 10 | + let role: SetappAIAPI.Responses.Role |
| 11 | + let content: String |
| 12 | + let timestamp: Date |
| 13 | + |
| 14 | + init(id: String = UUID().uuidString, role: SetappAIAPI.Responses.Role, content: String, timestamp: Date = Date()) { |
| 15 | + self.id = id |
| 16 | + self.role = role |
| 17 | + self.content = content |
| 18 | + self.timestamp = timestamp |
| 19 | + } |
| 20 | +} |
| 21 | + |
| 22 | +// MARK: - Conversation State |
| 23 | + |
| 24 | +struct ConversationState: Codable { |
| 25 | + var lastResponseId: String? |
| 26 | + var selectedModelId: String? |
| 27 | + |
| 28 | + init(lastResponseId: String? = nil, selectedModelId: String? = nil) { |
| 29 | + self.lastResponseId = lastResponseId |
| 30 | + self.selectedModelId = selectedModelId |
| 31 | + } |
| 32 | +} |
| 33 | + |
| 34 | +// MARK: - View Model |
| 35 | + |
| 36 | +@Observable |
| 37 | +@MainActor |
| 38 | +class AIViewModel { |
| 39 | +#if os(iOS) |
| 40 | + var isActivated: Bool = false |
| 41 | +#endif |
| 42 | + |
| 43 | + // Models |
| 44 | + var availableModels: [SetappAIAPI.Model] = [] |
| 45 | + var isLoadingModels = false |
| 46 | + var modelsError: Error? |
| 47 | + |
| 48 | + // Conversation state |
| 49 | + var state = ConversationState() |
| 50 | + var messages: [ChatMessage] = [] |
| 51 | + var prompt: String = "" |
| 52 | + var isStreaming = false |
| 53 | + var streamingError: Error? |
| 54 | + |
| 55 | + private var streamingTask: Task<Void, Never>? |
| 56 | + private var subscriptionCancellable: AnyCancellable? |
| 57 | + private var currentStreamingContent: String = "" |
| 58 | + |
| 59 | + private static let conversationStateKey = "AIViewModel.conversationState" |
| 60 | + |
| 61 | + init() { |
| 62 | +#if os(iOS) |
| 63 | + subscriptionCancellable = SetappManager.shared.publisher(for: \.subscription) |
| 64 | + .sink { [weak self] subscription in |
| 65 | + self?.isActivated = subscription?.isActive ?? false |
| 66 | + } |
| 67 | +#endif |
| 68 | + |
| 69 | + self.loadConversationState() |
| 70 | + } |
| 71 | + |
| 72 | + var selectedModel: SetappAIAPI.Model? { |
| 73 | + availableModels.first { $0.id == state.selectedModelId } |
| 74 | + } |
| 75 | + |
| 76 | + var canSendMessage: Bool { |
| 77 | + !isStreaming && !prompt.isEmpty && selectedModel != nil |
| 78 | + } |
| 79 | + |
| 80 | + // MARK: - Models API |
| 81 | + |
| 82 | + func loadModels() { |
| 83 | + isLoadingModels = true |
| 84 | + modelsError = nil |
| 85 | + |
| 86 | + Task { |
| 87 | + do { |
| 88 | + let models = try await SetappManager.shared.ai.models.list() |
| 89 | + self.availableModels = models |
| 90 | + |
| 91 | + // Auto-select first model if none selected |
| 92 | + if self.state.selectedModelId == nil, let firstModel = models.first { |
| 93 | + self.state.selectedModelId = firstModel.id |
| 94 | + self.saveConversationState() |
| 95 | + } |
| 96 | + |
| 97 | + self.isLoadingModels = false |
| 98 | + } catch { |
| 99 | + self.modelsError = error |
| 100 | + self.isLoadingModels = false |
| 101 | + } |
| 102 | + } |
| 103 | + } |
| 104 | + |
| 105 | + // MARK: - Conversation Management |
| 106 | + |
| 107 | + func clearConversation() { |
| 108 | + state = ConversationState(selectedModelId: state.selectedModelId) |
| 109 | + prompt = "" |
| 110 | + streamingError = nil |
| 111 | + messages = [] |
| 112 | + saveConversationState() |
| 113 | + } |
| 114 | + |
| 115 | + // MARK: - Persistence |
| 116 | + |
| 117 | + private func saveConversationState() { |
| 118 | + if let encoded = try? JSONEncoder().encode(state) { |
| 119 | + UserDefaults.standard.set(encoded, forKey: Self.conversationStateKey) |
| 120 | + } |
| 121 | + } |
| 122 | + |
| 123 | + private func loadConversationState() { |
| 124 | + guard let data = UserDefaults.standard.data(forKey: Self.conversationStateKey), |
| 125 | + let decoded = try? JSONDecoder().decode(ConversationState.self, from: data) else { |
| 126 | + return |
| 127 | + } |
| 128 | + state = decoded |
| 129 | + } |
| 130 | + |
| 131 | + // MARK: - Streaming API |
| 132 | + |
| 133 | + func sendMessage() { |
| 134 | + guard let model = selectedModel, !prompt.isEmpty else { return } |
| 135 | + |
| 136 | + // Cancel any existing stream |
| 137 | + cancelStreaming() |
| 138 | + |
| 139 | + // Add user message |
| 140 | + let userMessage = ChatMessage(role: .user, content: prompt) |
| 141 | + messages.append(userMessage) |
| 142 | + |
| 143 | + // Clear prompt |
| 144 | + let messageContent = prompt |
| 145 | + prompt = "" |
| 146 | + |
| 147 | + isStreaming = true |
| 148 | + streamingError = nil |
| 149 | + currentStreamingContent = "" |
| 150 | + |
| 151 | + streamingTask = Task { |
| 152 | + do { |
| 153 | + let stream = try await SetappManager.shared.ai.responses.createStream( |
| 154 | + model: model, |
| 155 | + input: [.message(messageContent)], |
| 156 | + previousResponseID: self.state.lastResponseId, // Use for keeping conversation context |
| 157 | + include: [.messageOutputTextLogprobs], |
| 158 | + store: true, |
| 159 | + temperature: 0.5, |
| 160 | + streamOptions: .init(includeObfuscation: false) |
| 161 | + ) |
| 162 | + |
| 163 | + let assistantMessageId = UUID().uuidString |
| 164 | + let assistantMessage = ChatMessage(id: assistantMessageId, role: .assistant, content: "") |
| 165 | + self.messages.append(assistantMessage) |
| 166 | + |
| 167 | + // Process streaming events |
| 168 | + for try await event in stream { |
| 169 | + guard !Task.isCancelled else { |
| 170 | + self.updateLastMessage(content: self.currentStreamingContent + "\n\n⚠️ Stream cancelled") |
| 171 | + break |
| 172 | + } |
| 173 | + |
| 174 | + // Handle text deltas |
| 175 | + if case let .response(.outputText(.delta(delta))) = event { |
| 176 | + self.currentStreamingContent += delta.delta |
| 177 | + self.updateLastMessage(content: self.currentStreamingContent) |
| 178 | + } |
| 179 | + |
| 180 | + if case let .response(.responseLifecycle(.completed(lifecycleEvent))) = event { |
| 181 | + state.lastResponseId = lifecycleEvent.response.id |
| 182 | + } |
| 183 | + } |
| 184 | + |
| 185 | + if !Task.isCancelled { |
| 186 | + // Finalize message |
| 187 | + self.updateLastMessage(content: self.currentStreamingContent) |
| 188 | + } |
| 189 | + |
| 190 | + self.currentStreamingContent = "" |
| 191 | + self.isStreaming = false |
| 192 | + self.saveConversationState() |
| 193 | + |
| 194 | + } catch is CancellationError { |
| 195 | + self.updateLastMessage(content: self.currentStreamingContent + "\n\n⚠️ Stream cancelled") |
| 196 | + self.currentStreamingContent = "" |
| 197 | + self.isStreaming = false |
| 198 | + self.saveConversationState() |
| 199 | + } catch { |
| 200 | + self.streamingError = error |
| 201 | + self.updateLastMessage(content: self.currentStreamingContent + "\n\n❌ Error: \(error.localizedDescription)") |
| 202 | + self.currentStreamingContent = "" |
| 203 | + self.isStreaming = false |
| 204 | + self.saveConversationState() |
| 205 | + } |
| 206 | + } |
| 207 | + } |
| 208 | + |
| 209 | + func cancelStreaming() { |
| 210 | + streamingTask?.cancel() |
| 211 | + streamingTask = nil |
| 212 | + } |
| 213 | + |
| 214 | + private func updateLastMessage(content: String) { |
| 215 | + guard let lastIndex = messages.indices.last else { return } |
| 216 | + let lastMessage = messages[lastIndex] |
| 217 | + messages[lastIndex] = ChatMessage( |
| 218 | + id: lastMessage.id, |
| 219 | + role: lastMessage.role, |
| 220 | + content: content, |
| 221 | + timestamp: lastMessage.timestamp |
| 222 | + ) |
| 223 | + } |
| 224 | +} |
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