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feat(streaming): include function_call #856

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feat(streaming): include function_call #856

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27 changes: 21 additions & 6 deletions apps/gateway/src/chat/tools/transform-streaming-to-openai.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -259,10 +259,27 @@ export function transformStreamingToOpenai(
};
} else if (data.candidates?.[0]?.finishReason) {
const finishReason = data.candidates[0].finishReason;
const parts = data.candidates[0].content?.parts || [];
// Check if there are function calls in this response
const hasFunctionCalls = data.candidates?.[0]?.content?.parts?.some(
(part: any) => part.functionCall,
);
const hasFunctionCalls = parts.some((part: any) => part.functionCall);

const delta: any = {
role: "assistant",
};

// If there are function calls, include the function_call object in delta
if (hasFunctionCalls) {
const firstFunctionCall = parts.find(
(part: any) => part.functionCall,
)?.functionCall;
if (firstFunctionCall) {
delta.function_call = {
name: firstFunctionCall.name,
arguments: JSON.stringify(firstFunctionCall.args || {}),
};
}
}

transformedData = {
id: data.responseId || `chatcmpl-${Date.now()}`,
object: "chat.completion.chunk",
Expand All @@ -271,9 +288,7 @@ export function transformStreamingToOpenai(
choices: [
{
index: data.candidates[0].index || 0,
delta: {
role: "assistant",
},
delta,
finish_reason:
finishReason === "STOP"
? hasFunctionCalls
Expand Down