misc review fixes

Author: paulb777

FirebaseAI/Sources/AILog.swift

@@ -17,6 +17,7 @@ import os.log
 
 internal import FirebaseCoreExtension
 
+@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 enum AILog {
   /// Log message codes for the Firebase AI SDK
   ///

FirebaseAI/Sources/GenerateContentRequest.swift

@@ -60,6 +60,15 @@ extension GenerateContentRequest: Encodable {
   }
 }
 
+@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+extension GenerateContentRequest {
+  enum APIMethod: String {
+    case generateContent
+    case streamGenerateContent
+    case countTokens
+  }
+}
+
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GenerateContentRequest: GenerativeAIRequest {
   typealias Response = GenerateContentResponse

FirebaseAI/Sources/TemplateGenerateContentRequest.swift

@@ -49,9 +49,11 @@ extension TemplateGenerateContentRequest: GenerativeAIRequest {
     if case let .vertexAI(_, location) = apiConfig.service {
       urlString += "/locations/\(location)"
     }
-    urlString += "/templates/\(template):templateGenerateContent"
+
     if stream {
-      urlString += "?alt=sse"
+      urlString += "/templates/\(template):templateStreamGenerateContent?alt=sse"
+    } else {
+      urlString += "/templates/\(template):templateGenerateContent"
     }
     guard let url = URL(string: urlString) else {
       throw AILog.makeInternalError(message: "Malformed URL: \(urlString)", code: .malformedURL)

FirebaseAI/Sources/TemplateGenerateImagesRequest.swift

@@ -14,6 +14,10 @@
 
 import Foundation
 
+enum ImageAPIMethod: String {
+  case generateImages = "templatePredict"
+}
+
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 class TemplateGenerateImagesRequest: @unchecked Sendable, GenerativeAIRequest {
   typealias Response = ImagenGenerationResponse<ImagenInlineImage>