62 lines
2.3 KiB
TypeScript
62 lines
2.3 KiB
TypeScript
/**
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* A1 阶段的占位引擎：把用户输入回显成一条助手消息，用来打通 HTTP / SSE 链路。
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*
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* 它刻意不做任何「理解」，也不调用 Provider——避免把假能力写进真实链路。
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* A3.1 定义正式 AgentRuntime、A3.2 写 FakeRuntime 之后，本文件整体替换。
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*/
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import type { EventBus } from './events.js';
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export interface EchoRunInput {
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sessionId: string;
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runId: string;
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messageId: string;
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text: string;
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bus: EventBus;
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signal: AbortSignal;
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}
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export interface EchoRunResult {
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text: string;
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finishReason: 'stop' | 'cancelled';
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}
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const CHUNK_SIZE = 6;
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const CHUNK_DELAY_MS = 25;
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const sleep = (ms: number): Promise<void> => new Promise((resolve) => setTimeout(resolve, ms));
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export async function runEcho(input: EchoRunInput): Promise<EchoRunResult> {
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const { bus, signal, sessionId, runId, messageId } = input;
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const replyMessageId = `${messageId}-reply`;
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const reply = `（A1 占位引擎）收到：${input.text}`;
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let emitted = '';
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bus.publish({ sessionId, runId, type: 'run.state', data: { state: 'running' } });
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for (let index = 0; index < reply.length; index += CHUNK_SIZE) {
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if (signal.aborted) return finish(true);
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const piece = reply.slice(index, index + CHUNK_SIZE);
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emitted += piece;
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bus.publish({ sessionId, runId, type: 'message.delta', data: { messageId: replyMessageId, text: piece } });
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await sleep(CHUNK_DELAY_MS);
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}
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if (signal.aborted) return finish(true);
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bus.publish({ sessionId, runId, type: 'message.completed', data: { messageId: replyMessageId, finishReason: 'stop' } });
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bus.publish({ sessionId, runId, type: 'run.state', data: { state: 'idle' } });
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return { text: emitted, finishReason: 'stop' };
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function finish(cancelled: boolean): EchoRunResult {
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// 取消路径：cancelling → 一条带 cancelled 结束原因的消息 → 回到 idle。
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// 'cancelled' 这个运行状态当前不使用（A3.1 定稿再确认语义）。
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bus.publish({ sessionId, runId, type: 'run.state', data: { state: 'cancelling' } });
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bus.publish({
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sessionId,
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runId,
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type: 'message.completed',
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data: { messageId: replyMessageId, finishReason: cancelled ? 'cancelled' : 'stop' },
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});
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bus.publish({ sessionId, runId, type: 'run.state', data: { state: 'idle' } });
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return { text: emitted, finishReason: 'cancelled' };
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}
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} |