Gemini - refactor PromptFeedback JSON format handling and add new Google Gemini examples.

Author: peterbanda

google-gemini-client/src/main/scala/io/cequence/openaiscala/gemini/JsonFormats.scala

@@ -358,7 +358,19 @@ trait JsonFormats {
 
   implicit lazy val topCandidatesFormat: Format[TopCandidates] = Json.format[TopCandidates]
 
-  implicit val promptFeedbackFormat: Format[PromptFeedback] = Json.format[PromptFeedback]
+  implicit val promptFeedbackReads: Reads[PromptFeedback] = (
+    (__ \ "blockReason").readNullable[BlockReason] and
+      (__ \ "safetyRatings").readWithDefault[Seq[SafetyRating]](Nil)
+  )(PromptFeedback.apply _)
+
+  implicit val promptFeedbackWrites: Writes[PromptFeedback] = (
+    (__ \ "blockReason").writeNullable[BlockReason] and
+      (__ \ "safetyRatings").write[Seq[SafetyRating]]
+  )(unlift(PromptFeedback.unapply))
+
+  implicit val promptFeedbackFormat: Format[PromptFeedback] =
+    Format(promptFeedbackReads, promptFeedbackWrites)
+
   implicit val generateContentResponseFormat: Format[GenerateContentResponse] =
     Json.using[Json.WithDefaultValues].format[GenerateContentResponse]
 

openai-examples/src/main/scala/io/cequence/openaiscala/examples/anthropic/AnthropicBedrockCreateChatCompletionWithOpenAIAdapter.scala

@@ -20,7 +20,7 @@ object AnthropicBedrockCreateChatCompletionWithOpenAIAdapter
 
   private val modelId =
     // using 'us.' prefix because of the cross-region inference (enabled only in the us)
-    "us." + NonOpenAIModelId.bedrock_claude_3_5_haiku_20241022_v1_0
+    "us." + NonOpenAIModelId.bedrock_claude_sonnet_4_20250514_v1_0
 
   override protected def run: Future[_] =
     service

openai-examples/src/main/scala/io/cequence/openaiscala/examples/googlegemini/GoogleGeminiCreateChatCompletionImageWithOpenAIAdapter.scala

@@ -0,0 +1,46 @@
+package io.cequence.openaiscala.examples.googlegemini
+
+import io.cequence.openaiscala.domain._
+import io.cequence.openaiscala.domain.settings.CreateChatCompletionSettings
+import io.cequence.openaiscala.examples.ExampleBase
+import io.cequence.openaiscala.gemini.service.GeminiServiceFactory
+import io.cequence.openaiscala.service.OpenAIChatCompletionService
+
+import scala.concurrent.Future
+import io.cequence.openaiscala.examples.BufferedImageHelper
+
+/**
+ * Requires `GOOGLE_API_KEY` environment variable to be set.
+ */
+object GoogleGeminiCreateChatCompletionImageWithOpenAIAdapter
+    extends ExampleBase[OpenAIChatCompletionService]
+    with BufferedImageHelper {
+
+  override val service: OpenAIChatCompletionService = GeminiServiceFactory.asOpenAI()
+
+  // provide a local jpeg here
+  private lazy val localImagePath = sys.env("EXAMPLE_IMAGE_PATH")
+  private val imageSource = imageBase64Source(new java.io.File(localImagePath))
+
+  val messages: Seq[BaseMessage] = Seq(
+    SystemMessage("You are a helpful assistant."),
+    UserSeqMessage(
+      Seq(
+        TextContent("What is in this picture?"),
+        ImageURLContent(s"data:image/jpeg;base64,${imageSource}")
+      )
+    )
+  )
+
+  private val modelId = NonOpenAIModelId.gemini_2_5_pro
+
+  override protected def run: Future[_] =
+    service
+      .createChatCompletion(
+        messages = messages,
+        settings = CreateChatCompletionSettings(
+          model = modelId
+        )
+      )
+      .map(printMessageContent)
+}

openai-examples/src/main/scala/io/cequence/openaiscala/examples/googlegemini/GoogleGeminiGenerateContentCached.scala

@@ -32,7 +32,7 @@ object GoogleGeminiGenerateContentCached extends ExampleBase[GeminiService] {
     finally source.close()
   }
 
-  private val model = NonOpenAIModelId.gemini_2_5_flash_preview_04_17
+  private val model = NonOpenAIModelId.gemini_2_5_flash
 
   private val knowledgeTextContent: Content =
     Content.textPart(

openai-examples/src/main/scala/io/cequence/openaiscala/examples/googlegemini/GoogleGeminiGenerateContentCachedWithOpenAIAdapter.scala

@@ -33,7 +33,7 @@ object GoogleGeminiGenerateContentCachedWithOpenAIAdapter
     finally source.close()
   }
 
-  private val model = NonOpenAIModelId.gemini_1_5_flash_002
+  private val model = NonOpenAIModelId.gemini_2_0_flash_lite
 
   private val systemMessage = SystemMessage(systemPrompt + "\n" + knowledgeContent)