741 lines
23 KiB
TypeScript
741 lines
23 KiB
TypeScript
/**
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* @license
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* Copyright 2025 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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import { useState, useRef, useCallback, useEffect, useMemo } from 'react';
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import { useInput } from 'ink';
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import {
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Config,
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GeminiClient,
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GeminiEventType as ServerGeminiEventType,
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ServerGeminiStreamEvent as GeminiEvent,
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ServerGeminiContentEvent as ContentEvent,
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ServerGeminiErrorEvent as ErrorEvent,
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ServerGeminiChatCompressedEvent,
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getErrorMessage,
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isNodeError,
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MessageSenderType,
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ToolCallRequestInfo,
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logUserPrompt,
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GitService,
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EditorType,
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ThoughtSummary,
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isAuthError,
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} from '@gemini-cli/core';
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import { type Part, type PartListUnion } from '@google/genai';
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import {
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StreamingState,
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HistoryItem,
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HistoryItemWithoutId,
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HistoryItemToolGroup,
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MessageType,
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ToolCallStatus,
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} from '../types.js';
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import { isAtCommand } from '../utils/commandUtils.js';
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import { parseAndFormatApiError } from '../utils/errorParsing.js';
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import { useShellCommandProcessor } from './shellCommandProcessor.js';
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import { handleAtCommand } from './atCommandProcessor.js';
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import { findLastSafeSplitPoint } from '../utils/markdownUtilities.js';
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import { useStateAndRef } from './useStateAndRef.js';
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import { UseHistoryManagerReturn } from './useHistoryManager.js';
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import { useLogger } from './useLogger.js';
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import { promises as fs } from 'fs';
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import path from 'path';
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import {
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useReactToolScheduler,
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mapToDisplay as mapTrackedToolCallsToDisplay,
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TrackedToolCall,
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TrackedCompletedToolCall,
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TrackedCancelledToolCall,
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} from './useReactToolScheduler.js';
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import { useSessionStats } from '../contexts/SessionContext.js';
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export function mergePartListUnions(list: PartListUnion[]): PartListUnion {
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const resultParts: PartListUnion = [];
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for (const item of list) {
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if (Array.isArray(item)) {
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resultParts.push(...item);
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} else {
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resultParts.push(item);
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}
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}
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return resultParts;
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}
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enum StreamProcessingStatus {
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Completed,
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UserCancelled,
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Error,
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}
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/**
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* Manages the Gemini stream, including user input, command processing,
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* API interaction, and tool call lifecycle.
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*/
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export const useGeminiStream = (
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geminiClient: GeminiClient,
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history: HistoryItem[],
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addItem: UseHistoryManagerReturn['addItem'],
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setShowHelp: React.Dispatch<React.SetStateAction<boolean>>,
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config: Config,
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onDebugMessage: (message: string) => void,
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handleSlashCommand: (
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cmd: PartListUnion,
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) => Promise<
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import('./slashCommandProcessor.js').SlashCommandActionReturn | boolean
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>,
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shellModeActive: boolean,
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getPreferredEditor: () => EditorType | undefined,
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onAuthError: () => void,
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) => {
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const [initError, setInitError] = useState<string | null>(null);
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const abortControllerRef = useRef<AbortController | null>(null);
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const [isResponding, setIsResponding] = useState<boolean>(false);
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const [thought, setThought] = useState<ThoughtSummary | null>(null);
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const [pendingHistoryItemRef, setPendingHistoryItem] =
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useStateAndRef<HistoryItemWithoutId | null>(null);
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const logger = useLogger();
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const { startNewTurn, addUsage } = useSessionStats();
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const gitService = useMemo(() => {
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if (!config.getProjectRoot()) {
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return;
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}
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return new GitService(config.getProjectRoot());
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}, [config]);
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const [toolCalls, scheduleToolCalls, markToolsAsSubmitted] =
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useReactToolScheduler(
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(completedToolCallsFromScheduler) => {
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// This onComplete is called when ALL scheduled tools for a given batch are done.
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if (completedToolCallsFromScheduler.length > 0) {
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// Add the final state of these tools to the history for display.
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// The new useEffect will handle submitting their responses.
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addItem(
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mapTrackedToolCallsToDisplay(
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completedToolCallsFromScheduler as TrackedToolCall[],
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),
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Date.now(),
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);
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}
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},
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config,
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setPendingHistoryItem,
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getPreferredEditor,
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);
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const pendingToolCallGroupDisplay = useMemo(
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() =>
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toolCalls.length ? mapTrackedToolCallsToDisplay(toolCalls) : undefined,
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[toolCalls],
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);
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const onExec = useCallback(async (done: Promise<void>) => {
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setIsResponding(true);
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await done;
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setIsResponding(false);
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}, []);
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const { handleShellCommand } = useShellCommandProcessor(
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addItem,
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setPendingHistoryItem,
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onExec,
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onDebugMessage,
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config,
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geminiClient,
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);
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const streamingState = useMemo(() => {
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if (toolCalls.some((tc) => tc.status === 'awaiting_approval')) {
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return StreamingState.WaitingForConfirmation;
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}
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if (
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isResponding ||
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toolCalls.some(
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(tc) =>
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tc.status === 'executing' ||
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tc.status === 'scheduled' ||
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tc.status === 'validating',
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)
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) {
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return StreamingState.Responding;
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}
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return StreamingState.Idle;
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}, [isResponding, toolCalls]);
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useEffect(() => {
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if (streamingState === StreamingState.Idle) {
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abortControllerRef.current = null;
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}
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}, [streamingState]);
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useInput((_input, key) => {
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if (streamingState !== StreamingState.Idle && key.escape) {
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abortControllerRef.current?.abort();
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}
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});
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const prepareQueryForGemini = useCallback(
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async (
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query: PartListUnion,
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userMessageTimestamp: number,
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abortSignal: AbortSignal,
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): Promise<{
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queryToSend: PartListUnion | null;
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shouldProceed: boolean;
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}> => {
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if (typeof query === 'string' && query.trim().length === 0) {
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return { queryToSend: null, shouldProceed: false };
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}
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let localQueryToSendToGemini: PartListUnion | null = null;
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if (typeof query === 'string') {
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const trimmedQuery = query.trim();
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logUserPrompt(config, {
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prompt: trimmedQuery,
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prompt_length: trimmedQuery.length,
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});
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onDebugMessage(`User query: '${trimmedQuery}'`);
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await logger?.logMessage(MessageSenderType.USER, trimmedQuery);
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// Handle UI-only commands first
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const slashCommandResult = await handleSlashCommand(trimmedQuery);
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if (typeof slashCommandResult === 'boolean' && slashCommandResult) {
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// Command was handled, and it doesn't require a tool call from here
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return { queryToSend: null, shouldProceed: false };
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} else if (
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typeof slashCommandResult === 'object' &&
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slashCommandResult.shouldScheduleTool
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) {
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// Slash command wants to schedule a tool call (e.g., /memory add)
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const { toolName, toolArgs } = slashCommandResult;
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if (toolName && toolArgs) {
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const toolCallRequest: ToolCallRequestInfo = {
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callId: `${toolName}-${Date.now()}-${Math.random().toString(16).slice(2)}`,
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name: toolName,
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args: toolArgs,
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};
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scheduleToolCalls([toolCallRequest], abortSignal);
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}
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return { queryToSend: null, shouldProceed: false }; // Handled by scheduling the tool
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}
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if (shellModeActive && handleShellCommand(trimmedQuery, abortSignal)) {
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return { queryToSend: null, shouldProceed: false };
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}
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// Handle @-commands (which might involve tool calls)
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if (isAtCommand(trimmedQuery)) {
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const atCommandResult = await handleAtCommand({
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query: trimmedQuery,
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config,
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addItem,
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onDebugMessage,
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messageId: userMessageTimestamp,
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signal: abortSignal,
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});
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if (!atCommandResult.shouldProceed) {
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return { queryToSend: null, shouldProceed: false };
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}
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localQueryToSendToGemini = atCommandResult.processedQuery;
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} else {
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// Normal query for Gemini
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addItem(
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{ type: MessageType.USER, text: trimmedQuery },
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userMessageTimestamp,
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);
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localQueryToSendToGemini = trimmedQuery;
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}
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} else {
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// It's a function response (PartListUnion that isn't a string)
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localQueryToSendToGemini = query;
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}
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if (localQueryToSendToGemini === null) {
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onDebugMessage(
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'Query processing resulted in null, not sending to Gemini.',
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);
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return { queryToSend: null, shouldProceed: false };
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}
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return { queryToSend: localQueryToSendToGemini, shouldProceed: true };
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},
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[
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config,
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addItem,
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onDebugMessage,
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handleShellCommand,
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handleSlashCommand,
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logger,
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shellModeActive,
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scheduleToolCalls,
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],
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);
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// --- Stream Event Handlers ---
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const handleContentEvent = useCallback(
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(
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eventValue: ContentEvent['value'],
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currentGeminiMessageBuffer: string,
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userMessageTimestamp: number,
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): string => {
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let newGeminiMessageBuffer = currentGeminiMessageBuffer + eventValue;
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if (
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pendingHistoryItemRef.current?.type !== 'gemini' &&
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pendingHistoryItemRef.current?.type !== 'gemini_content'
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) {
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if (pendingHistoryItemRef.current) {
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addItem(pendingHistoryItemRef.current, userMessageTimestamp);
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}
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setPendingHistoryItem({ type: 'gemini', text: '' });
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newGeminiMessageBuffer = eventValue;
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}
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// Split large messages for better rendering performance. Ideally,
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// we should maximize the amount of output sent to <Static />.
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const splitPoint = findLastSafeSplitPoint(newGeminiMessageBuffer);
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if (splitPoint === newGeminiMessageBuffer.length) {
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// Update the existing message with accumulated content
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setPendingHistoryItem((item) => ({
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type: item?.type as 'gemini' | 'gemini_content',
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text: newGeminiMessageBuffer,
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}));
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} else {
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// This indicates that we need to split up this Gemini Message.
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// Splitting a message is primarily a performance consideration. There is a
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// <Static> component at the root of App.tsx which takes care of rendering
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// content statically or dynamically. Everything but the last message is
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// treated as static in order to prevent re-rendering an entire message history
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// multiple times per-second (as streaming occurs). Prior to this change you'd
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// see heavy flickering of the terminal. This ensures that larger messages get
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// broken up so that there are more "statically" rendered.
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const beforeText = newGeminiMessageBuffer.substring(0, splitPoint);
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const afterText = newGeminiMessageBuffer.substring(splitPoint);
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addItem(
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{
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type: pendingHistoryItemRef.current?.type as
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| 'gemini'
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| 'gemini_content',
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text: beforeText,
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},
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userMessageTimestamp,
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);
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setPendingHistoryItem({ type: 'gemini_content', text: afterText });
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newGeminiMessageBuffer = afterText;
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}
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return newGeminiMessageBuffer;
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},
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[addItem, pendingHistoryItemRef, setPendingHistoryItem],
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);
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const handleUserCancelledEvent = useCallback(
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(userMessageTimestamp: number) => {
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if (pendingHistoryItemRef.current) {
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if (pendingHistoryItemRef.current.type === 'tool_group') {
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const updatedTools = pendingHistoryItemRef.current.tools.map(
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(tool) =>
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tool.status === ToolCallStatus.Pending ||
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tool.status === ToolCallStatus.Confirming ||
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tool.status === ToolCallStatus.Executing
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? { ...tool, status: ToolCallStatus.Canceled }
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: tool,
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);
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const pendingItem: HistoryItemToolGroup = {
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...pendingHistoryItemRef.current,
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tools: updatedTools,
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};
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addItem(pendingItem, userMessageTimestamp);
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} else {
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addItem(pendingHistoryItemRef.current, userMessageTimestamp);
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}
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setPendingHistoryItem(null);
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}
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addItem(
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{ type: MessageType.INFO, text: 'User cancelled the request.' },
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userMessageTimestamp,
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);
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setIsResponding(false);
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},
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[addItem, pendingHistoryItemRef, setPendingHistoryItem],
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);
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const handleErrorEvent = useCallback(
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(eventValue: ErrorEvent['value'], userMessageTimestamp: number) => {
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if (pendingHistoryItemRef.current) {
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addItem(pendingHistoryItemRef.current, userMessageTimestamp);
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setPendingHistoryItem(null);
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}
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addItem(
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{ type: MessageType.ERROR, text: `[API Error: ${eventValue.message}]` },
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userMessageTimestamp,
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);
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},
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[addItem, pendingHistoryItemRef, setPendingHistoryItem],
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);
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const handleChatCompressionEvent = useCallback(
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(eventValue: ServerGeminiChatCompressedEvent['value']) =>
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addItem(
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{
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type: 'info',
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text:
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`IMPORTANT: This conversation approached the input token limit for ${config.getModel()}. ` +
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`A compressed context will be sent for future messages (compressed from: ` +
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`${eventValue?.originalTokenCount ?? 'unknown'} to ` +
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`${eventValue?.newTokenCount ?? 'unknown'} tokens).`,
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},
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Date.now(),
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),
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[addItem, config],
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);
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const processGeminiStreamEvents = useCallback(
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async (
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stream: AsyncIterable<GeminiEvent>,
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userMessageTimestamp: number,
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signal: AbortSignal,
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): Promise<StreamProcessingStatus> => {
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let geminiMessageBuffer = '';
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const toolCallRequests: ToolCallRequestInfo[] = [];
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for await (const event of stream) {
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switch (event.type) {
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case ServerGeminiEventType.Thought:
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setThought(event.value);
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break;
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case ServerGeminiEventType.Content:
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geminiMessageBuffer = handleContentEvent(
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event.value,
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geminiMessageBuffer,
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userMessageTimestamp,
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);
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break;
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case ServerGeminiEventType.ToolCallRequest:
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toolCallRequests.push(event.value);
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break;
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case ServerGeminiEventType.UserCancelled:
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handleUserCancelledEvent(userMessageTimestamp);
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break;
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case ServerGeminiEventType.Error:
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handleErrorEvent(event.value, userMessageTimestamp);
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break;
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case ServerGeminiEventType.ChatCompressed:
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handleChatCompressionEvent(event.value);
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break;
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case ServerGeminiEventType.UsageMetadata:
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addUsage(event.value);
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break;
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case ServerGeminiEventType.ToolCallConfirmation:
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case ServerGeminiEventType.ToolCallResponse:
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// do nothing
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break;
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default: {
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// enforces exhaustive switch-case
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const unreachable: never = event;
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return unreachable;
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}
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}
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}
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if (toolCallRequests.length > 0) {
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scheduleToolCalls(toolCallRequests, signal);
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}
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return StreamProcessingStatus.Completed;
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},
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[
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handleContentEvent,
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handleUserCancelledEvent,
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handleErrorEvent,
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scheduleToolCalls,
|
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handleChatCompressionEvent,
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addUsage,
|
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],
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);
|
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const submitQuery = useCallback(
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async (query: PartListUnion, options?: { isContinuation: boolean }) => {
|
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if (
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streamingState === StreamingState.Responding ||
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streamingState === StreamingState.WaitingForConfirmation
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)
|
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return;
|
|
|
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const userMessageTimestamp = Date.now();
|
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setShowHelp(false);
|
|
|
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abortControllerRef.current = new AbortController();
|
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const abortSignal = abortControllerRef.current.signal;
|
|
|
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const { queryToSend, shouldProceed } = await prepareQueryForGemini(
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query,
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userMessageTimestamp,
|
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abortSignal,
|
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);
|
|
|
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if (!shouldProceed || queryToSend === null) {
|
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return;
|
|
}
|
|
|
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if (!options?.isContinuation) {
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startNewTurn();
|
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}
|
|
|
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setIsResponding(true);
|
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setInitError(null);
|
|
|
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try {
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const stream = geminiClient.sendMessageStream(queryToSend, abortSignal);
|
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const processingStatus = await processGeminiStreamEvents(
|
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stream,
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userMessageTimestamp,
|
|
abortSignal,
|
|
);
|
|
|
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if (processingStatus === StreamProcessingStatus.UserCancelled) {
|
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return;
|
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}
|
|
|
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if (pendingHistoryItemRef.current) {
|
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addItem(pendingHistoryItemRef.current, userMessageTimestamp);
|
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setPendingHistoryItem(null);
|
|
}
|
|
} catch (error: unknown) {
|
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if (isAuthError(error)) {
|
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onAuthError();
|
|
} else if (!isNodeError(error) || error.name !== 'AbortError') {
|
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addItem(
|
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{
|
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type: MessageType.ERROR,
|
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text: parseAndFormatApiError(
|
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getErrorMessage(error) || 'Unknown error',
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),
|
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},
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userMessageTimestamp,
|
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);
|
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}
|
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} finally {
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setIsResponding(false);
|
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}
|
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},
|
|
[
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streamingState,
|
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setShowHelp,
|
|
prepareQueryForGemini,
|
|
processGeminiStreamEvents,
|
|
pendingHistoryItemRef,
|
|
addItem,
|
|
setPendingHistoryItem,
|
|
setInitError,
|
|
geminiClient,
|
|
startNewTurn,
|
|
onAuthError,
|
|
],
|
|
);
|
|
|
|
/**
|
|
* Automatically submits responses for completed tool calls.
|
|
* This effect runs when `toolCalls` or `isResponding` changes.
|
|
* It ensures that tool responses are sent back to Gemini only when
|
|
* all processing for a given set of tools is finished and Gemini
|
|
* is not already generating a response.
|
|
*/
|
|
useEffect(() => {
|
|
if (isResponding) {
|
|
return;
|
|
}
|
|
|
|
const completedAndReadyToSubmitTools = toolCalls.filter(
|
|
(
|
|
tc: TrackedToolCall,
|
|
): tc is TrackedCompletedToolCall | TrackedCancelledToolCall => {
|
|
const isTerminalState =
|
|
tc.status === 'success' ||
|
|
tc.status === 'error' ||
|
|
tc.status === 'cancelled';
|
|
|
|
if (isTerminalState) {
|
|
const completedOrCancelledCall = tc as
|
|
| TrackedCompletedToolCall
|
|
| TrackedCancelledToolCall;
|
|
return (
|
|
!completedOrCancelledCall.responseSubmittedToGemini &&
|
|
completedOrCancelledCall.response?.responseParts !== undefined
|
|
);
|
|
}
|
|
return false;
|
|
},
|
|
);
|
|
|
|
if (
|
|
completedAndReadyToSubmitTools.length > 0 &&
|
|
completedAndReadyToSubmitTools.length === toolCalls.length
|
|
) {
|
|
// If all the tools were cancelled, don't submit a response to Gemini.
|
|
const allToolsCancelled = completedAndReadyToSubmitTools.every(
|
|
(tc) => tc.status === 'cancelled',
|
|
);
|
|
|
|
if (allToolsCancelled) {
|
|
if (geminiClient) {
|
|
// We need to manually add the function responses to the history
|
|
// so the model knows the tools were cancelled.
|
|
const responsesToAdd = completedAndReadyToSubmitTools.flatMap(
|
|
(toolCall) => toolCall.response.responseParts,
|
|
);
|
|
for (const response of responsesToAdd) {
|
|
let parts: Part[];
|
|
if (Array.isArray(response)) {
|
|
parts = response;
|
|
} else if (typeof response === 'string') {
|
|
parts = [{ text: response }];
|
|
} else {
|
|
parts = [response];
|
|
}
|
|
geminiClient.addHistory({
|
|
role: 'user',
|
|
parts,
|
|
});
|
|
}
|
|
}
|
|
|
|
const callIdsToMarkAsSubmitted = completedAndReadyToSubmitTools.map(
|
|
(toolCall) => toolCall.request.callId,
|
|
);
|
|
markToolsAsSubmitted(callIdsToMarkAsSubmitted);
|
|
return;
|
|
}
|
|
|
|
const responsesToSend: PartListUnion[] =
|
|
completedAndReadyToSubmitTools.map(
|
|
(toolCall) => toolCall.response.responseParts,
|
|
);
|
|
const callIdsToMarkAsSubmitted = completedAndReadyToSubmitTools.map(
|
|
(toolCall) => toolCall.request.callId,
|
|
);
|
|
|
|
markToolsAsSubmitted(callIdsToMarkAsSubmitted);
|
|
submitQuery(mergePartListUnions(responsesToSend), {
|
|
isContinuation: true,
|
|
});
|
|
}
|
|
}, [
|
|
toolCalls,
|
|
isResponding,
|
|
submitQuery,
|
|
markToolsAsSubmitted,
|
|
addItem,
|
|
geminiClient,
|
|
]);
|
|
|
|
const pendingHistoryItems = [
|
|
pendingHistoryItemRef.current,
|
|
pendingToolCallGroupDisplay,
|
|
].filter((i) => i !== undefined && i !== null);
|
|
|
|
useEffect(() => {
|
|
const saveRestorableToolCalls = async () => {
|
|
if (!config.getCheckpointEnabled()) {
|
|
return;
|
|
}
|
|
const restorableToolCalls = toolCalls.filter(
|
|
(toolCall) =>
|
|
(toolCall.request.name === 'replace' ||
|
|
toolCall.request.name === 'write_file') &&
|
|
toolCall.status === 'awaiting_approval',
|
|
);
|
|
|
|
if (restorableToolCalls.length > 0) {
|
|
const checkpointDir = config.getGeminiDir()
|
|
? path.join(config.getGeminiDir(), 'checkpoints')
|
|
: undefined;
|
|
|
|
if (!checkpointDir) {
|
|
return;
|
|
}
|
|
|
|
try {
|
|
await fs.mkdir(checkpointDir, { recursive: true });
|
|
} catch (error) {
|
|
if (!isNodeError(error) || error.code !== 'EEXIST') {
|
|
onDebugMessage(
|
|
`Failed to create checkpoint directory: ${getErrorMessage(error)}`,
|
|
);
|
|
return;
|
|
}
|
|
}
|
|
|
|
for (const toolCall of restorableToolCalls) {
|
|
const filePath = toolCall.request.args['file_path'] as string;
|
|
if (!filePath) {
|
|
onDebugMessage(
|
|
`Skipping restorable tool call due to missing file_path: ${toolCall.request.name}`,
|
|
);
|
|
continue;
|
|
}
|
|
|
|
try {
|
|
let commitHash = await gitService?.createFileSnapshot(
|
|
`Snapshot for ${toolCall.request.name}`,
|
|
);
|
|
|
|
if (!commitHash) {
|
|
commitHash = await gitService?.getCurrentCommitHash();
|
|
}
|
|
|
|
if (!commitHash) {
|
|
onDebugMessage(
|
|
`Failed to create snapshot for ${filePath}. Skipping restorable tool call.`,
|
|
);
|
|
continue;
|
|
}
|
|
|
|
const timestamp = new Date()
|
|
.toISOString()
|
|
.replace(/:/g, '-')
|
|
.replace(/\./g, '_');
|
|
const toolName = toolCall.request.name;
|
|
const fileName = path.basename(filePath);
|
|
const toolCallWithSnapshotFileName = `${timestamp}-${fileName}-${toolName}.json`;
|
|
const clientHistory = await geminiClient?.getHistory();
|
|
const toolCallWithSnapshotFilePath = path.join(
|
|
checkpointDir,
|
|
toolCallWithSnapshotFileName,
|
|
);
|
|
|
|
await fs.writeFile(
|
|
toolCallWithSnapshotFilePath,
|
|
JSON.stringify(
|
|
{
|
|
history,
|
|
clientHistory,
|
|
toolCall: {
|
|
name: toolCall.request.name,
|
|
args: toolCall.request.args,
|
|
},
|
|
commitHash,
|
|
filePath,
|
|
},
|
|
null,
|
|
2,
|
|
),
|
|
);
|
|
} catch (error) {
|
|
onDebugMessage(
|
|
`Failed to write restorable tool call file: ${getErrorMessage(
|
|
error,
|
|
)}`,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
saveRestorableToolCalls();
|
|
}, [toolCalls, config, onDebugMessage, gitService, history, geminiClient]);
|
|
|
|
return {
|
|
streamingState,
|
|
submitQuery,
|
|
initError,
|
|
pendingHistoryItems,
|
|
thought,
|
|
};
|
|
};
|