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feat(translator): add usage metadata mapping for Gemini responses

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- Implemented mapping for input, output, and total token usage in Gemini OpenAI response processing.
- Ensured compatibility with existing response structure even when specific token details are unavailable.
This commit is contained in:
Luis Pater
2025-09-27 00:23:09 +08:00
parent 92c8cd7c72
commit 6524d3a51e
1 changed files with 19 additions and 0 deletions
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19
internal/translator/gemini/openai/responses/gemini_openai-responses_response.go
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@@ -414,6 +414,25 @@ func ConvertGeminiResponseToOpenAIResponses(_ context.Context, modelName string,
completed, _ = sjson.Set(completed, "response.output", outputs) completed, _ = sjson.Set(completed, "response.output", outputs)
} }
// usage mapping
if um := root.Get("usageMetadata"); um.Exists() {
// input tokens = prompt + thoughts
input := um.Get("promptTokenCount").Int() + um.Get("thoughtsTokenCount").Int()
completed, _ = sjson.Set(completed, "response.usage.input_tokens", input)
// cached_tokens not provided by Gemini; default to 0 for structure compatibility
completed, _ = sjson.Set(completed, "response.usage.input_tokens_details.cached_tokens", 0)
// output tokens
if v := um.Get("candidatesTokenCount"); v.Exists() {
completed, _ = sjson.Set(completed, "response.usage.output_tokens", v.Int())
}
if v := um.Get("thoughtsTokenCount"); v.Exists() {
completed, _ = sjson.Set(completed, "response.usage.output_tokens_details.reasoning_tokens", v.Int())
}
if v := um.Get("totalTokenCount"); v.Exists() {
completed, _ = sjson.Set(completed, "response.usage.total_tokens", v.Int())
}
}
out = append(out, emitEvent("response.completed", completed)) out = append(out, emitEvent("response.completed", completed))
} }