initial commit

SousChefAI/Services/VisionService.swift

@@ -0,0 +1,60 @@
+//
+//  VisionService.swift
+//  SousChefAI
+//
+//  Protocol-based vision service for ingredient detection
+//  Allows swapping between different AI providers
+//
+
+import Foundation
+@preconcurrency import CoreVideo
+
+/// Protocol for vision-based ingredient detection services
+protocol VisionService: Sendable {
+    /// Detects ingredients from a stream of video frames
+    /// - Parameter stream: Async stream of pixel buffers from camera
+    /// - Returns: Array of detected ingredients with confidence scores
+    func detectIngredients(from stream: AsyncStream<CVPixelBuffer>) async throws -> [Ingredient]
+    
+    /// Detects ingredients from a single image
+    /// - Parameter pixelBuffer: Single frame to analyze
+    /// - Returns: Array of detected ingredients with confidence scores
+    func detectIngredients(from pixelBuffer: CVPixelBuffer) async throws -> [Ingredient]
+    
+    /// Analyzes cooking progress for a given step
+    /// - Parameters:
+    ///   - stream: Video stream of current cooking
+    ///   - step: The cooking step to monitor
+    /// - Returns: Progress update and completion detection
+    func analyzeCookingProgress(from stream: AsyncStream<CVPixelBuffer>, for step: String) async throws -> CookingProgress
+}
+
+/// Represents cooking progress analysis
+struct CookingProgress: Sendable {
+    let isComplete: Bool
+    let confidence: Double
+    let feedback: String
+}
+
+enum VisionServiceError: Error, LocalizedError {
+    case connectionFailed
+    case invalidResponse
+    case apiKeyMissing
+    case networkError(Error)
+    case decodingError(Error)
+    
+    var errorDescription: String? {
+        switch self {
+        case .connectionFailed:
+            return "Failed to connect to vision service"
+        case .invalidResponse:
+            return "Received invalid response from vision service"
+        case .apiKeyMissing:
+            return "Vision service API key not configured"
+        case .networkError(let error):
+            return "Network error: \(error.localizedDescription)"
+        case .decodingError(let error):
+            return "Failed to decode response: \(error.localizedDescription)"
+        }
+    }
+}