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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { GenerateContentResponse, Part, FunctionCall } from '@google/genai';
export function getResponseText(
response: GenerateContentResponse,
): string | undefined {
const parts = response.candidates?.[0]?.content?.parts;
if (!parts) {
return undefined;
}
const textSegments = parts
.map((part) => part.text)
.filter((text): text is string => typeof text === 'string');
if (textSegments.length === 0) {
return undefined;
}
return textSegments.join('');
}
export function getResponseTextFromParts(parts: Part[]): string | undefined {
if (!parts) {
return undefined;
}
const textSegments = parts
.map((part) => part.text)
.filter((text): text is string => typeof text === 'string');
if (textSegments.length === 0) {
return undefined;
}
return textSegments.join('');
}
export function getFunctionCalls(
response: GenerateContentResponse,
): FunctionCall[] | undefined {
const parts = response.candidates?.[0]?.content?.parts;
if (!parts) {
return undefined;
}
const functionCallParts = parts
.filter((part) => !!part.functionCall)
.map((part) => part.functionCall as FunctionCall);
return functionCallParts.length > 0 ? functionCallParts : undefined;
}
export function getFunctionCallsFromParts(
parts: Part[],
): FunctionCall[] | undefined {
if (!parts) {
return undefined;
}
const functionCallParts = parts
.filter((part) => !!part.functionCall)
.map((part) => part.functionCall as FunctionCall);
return functionCallParts.length > 0 ? functionCallParts : undefined;
}
export function getFunctionCallsAsJson(
response: GenerateContentResponse,
): string | undefined {
const functionCalls = getFunctionCalls(response);
if (!functionCalls) {
return undefined;
}
return JSON.stringify(functionCalls, null, 2);
}
export function getFunctionCallsFromPartsAsJson(
parts: Part[],
): string | undefined {
const functionCalls = getFunctionCallsFromParts(parts);
if (!functionCalls) {
return undefined;
}
return JSON.stringify(functionCalls, null, 2);
}
export function getStructuredResponse(
response: GenerateContentResponse,
): string | undefined {
const textContent = getResponseText(response);
const functionCallsJson = getFunctionCallsAsJson(response);
if (textContent && functionCallsJson) {
return `${textContent}\n${functionCallsJson}`;
}
if (textContent) {
return textContent;
}
if (functionCallsJson) {
return functionCallsJson;
}
return undefined;
}
export function getStructuredResponseFromParts(
parts: Part[],
): string | undefined {
const textContent = getResponseTextFromParts(parts);
const functionCallsJson = getFunctionCallsFromPartsAsJson(parts);
if (textContent && functionCallsJson) {
return `${textContent}\n${functionCallsJson}`;
}
if (textContent) {
return textContent;
}
if (functionCallsJson) {
return functionCallsJson;
}
return undefined;
}
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