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Viewing file:     ResponseStream.js (10.83 KB)      -rw-r--r--

"use strict";
var _ResponseStream_instances, _ResponseStream_params, _ResponseStream_currentResponseSnapshot, _ResponseStream_finalResponse, _ResponseStream_beginRequest, _ResponseStream_addEvent, _ResponseStream_endRequest, _ResponseStream_accumulateResponse;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ResponseStream = void 0;
const tslib_1 = require("../../internal/tslib.js");
const error_1 = require("../../error.js");
const EventStream_1 = require("../EventStream.js");
const ResponsesParser_1 = require("../ResponsesParser.js");
class ResponseStream extends EventStream_1.EventStream {
    constructor(params) {
        super();
        _ResponseStream_instances.add(this);
        _ResponseStream_params.set(this, void 0);
        _ResponseStream_currentResponseSnapshot.set(this, void 0);
        _ResponseStream_finalResponse.set(this, void 0);
        tslib_1.__classPrivateFieldSet(this, _ResponseStream_params, params, "f");
    }
    static createResponse(client, params, options) {
        const runner = new ResponseStream(params);
        runner._run(() => runner._createOrRetrieveResponse(client, params, {
            ...options,
            headers: { ...options?.headers, 'X-Stainless-Helper-Method': 'stream' },
        }));
        return runner;
    }
    async _createOrRetrieveResponse(client, params, options) {
        const signal = options?.signal;
        if (signal) {
            if (signal.aborted)
                this.controller.abort();
            signal.addEventListener('abort', () => this.controller.abort());
        }
        tslib_1.__classPrivateFieldGet(this, _ResponseStream_instances, "m", _ResponseStream_beginRequest).call(this);
        let stream;
        let starting_after = null;
        if ('response_id' in params) {
            stream = await client.responses.retrieve(params.response_id, { stream: true }, { ...options, signal: this.controller.signal, stream: true });
            starting_after = params.starting_after ?? null;
        }
        else {
            stream = await client.responses.create({ ...params, stream: true }, { ...options, signal: this.controller.signal });
        }
        this._connected();
        for await (const event of stream) {
            tslib_1.__classPrivateFieldGet(this, _ResponseStream_instances, "m", _ResponseStream_addEvent).call(this, event, starting_after);
        }
        if (stream.controller.signal?.aborted) {
            throw new error_1.APIUserAbortError();
        }
        return tslib_1.__classPrivateFieldGet(this, _ResponseStream_instances, "m", _ResponseStream_endRequest).call(this);
    }
    [(_ResponseStream_params = new WeakMap(), _ResponseStream_currentResponseSnapshot = new WeakMap(), _ResponseStream_finalResponse = new WeakMap(), _ResponseStream_instances = new WeakSet(), _ResponseStream_beginRequest = function _ResponseStream_beginRequest() {
        if (this.ended)
            return;
        tslib_1.__classPrivateFieldSet(this, _ResponseStream_currentResponseSnapshot, undefined, "f");
    }, _ResponseStream_addEvent = function _ResponseStream_addEvent(event, starting_after) {
        if (this.ended)
            return;
        const maybeEmit = (name, event) => {
            if (starting_after == null || event.sequence_number > starting_after) {
                this._emit(name, event);
            }
        };
        const response = tslib_1.__classPrivateFieldGet(this, _ResponseStream_instances, "m", _ResponseStream_accumulateResponse).call(this, event);
        maybeEmit('event', event);
        switch (event.type) {
            case 'response.output_text.delta': {
                const output = response.output[event.output_index];
                if (!output) {
                    throw new error_1.OpenAIError(`missing output at index ${event.output_index}`);
                }
                if (output.type === 'message') {
                    const content = output.content[event.content_index];
                    if (!content) {
                        throw new error_1.OpenAIError(`missing content at index ${event.content_index}`);
                    }
                    if (content.type !== 'output_text') {
                        throw new error_1.OpenAIError(`expected content to be 'output_text', got ${content.type}`);
                    }
                    maybeEmit('response.output_text.delta', {
                        ...event,
                        snapshot: content.text,
                    });
                }
                break;
            }
            case 'response.function_call_arguments.delta': {
                const output = response.output[event.output_index];
                if (!output) {
                    throw new error_1.OpenAIError(`missing output at index ${event.output_index}`);
                }
                if (output.type === 'function_call') {
                    maybeEmit('response.function_call_arguments.delta', {
                        ...event,
                        snapshot: output.arguments,
                    });
                }
                break;
            }
            default:
                maybeEmit(event.type, event);
                break;
        }
    }, _ResponseStream_endRequest = function _ResponseStream_endRequest() {
        if (this.ended) {
            throw new error_1.OpenAIError(`stream has ended, this shouldn't happen`);
        }
        const snapshot = tslib_1.__classPrivateFieldGet(this, _ResponseStream_currentResponseSnapshot, "f");
        if (!snapshot) {
            throw new error_1.OpenAIError(`request ended without sending any events`);
        }
        tslib_1.__classPrivateFieldSet(this, _ResponseStream_currentResponseSnapshot, undefined, "f");
        const parsedResponse = finalizeResponse(snapshot, tslib_1.__classPrivateFieldGet(this, _ResponseStream_params, "f"));
        tslib_1.__classPrivateFieldSet(this, _ResponseStream_finalResponse, parsedResponse, "f");
        return parsedResponse;
    }, _ResponseStream_accumulateResponse = function _ResponseStream_accumulateResponse(event) {
        let snapshot = tslib_1.__classPrivateFieldGet(this, _ResponseStream_currentResponseSnapshot, "f");
        if (!snapshot) {
            if (event.type !== 'response.created') {
                throw new error_1.OpenAIError(`When snapshot hasn't been set yet, expected 'response.created' event, got ${event.type}`);
            }
            snapshot = tslib_1.__classPrivateFieldSet(this, _ResponseStream_currentResponseSnapshot, event.response, "f");
            return snapshot;
        }
        switch (event.type) {
            case 'response.output_item.added': {
                snapshot.output.push(event.item);
                break;
            }
            case 'response.content_part.added': {
                const output = snapshot.output[event.output_index];
                if (!output) {
                    throw new error_1.OpenAIError(`missing output at index ${event.output_index}`);
                }
                if (output.type === 'message') {
                    output.content.push(event.part);
                }
                break;
            }
            case 'response.output_text.delta': {
                const output = snapshot.output[event.output_index];
                if (!output) {
                    throw new error_1.OpenAIError(`missing output at index ${event.output_index}`);
                }
                if (output.type === 'message') {
                    const content = output.content[event.content_index];
                    if (!content) {
                        throw new error_1.OpenAIError(`missing content at index ${event.content_index}`);
                    }
                    if (content.type !== 'output_text') {
                        throw new error_1.OpenAIError(`expected content to be 'output_text', got ${content.type}`);
                    }
                    content.text += event.delta;
                }
                break;
            }
            case 'response.function_call_arguments.delta': {
                const output = snapshot.output[event.output_index];
                if (!output) {
                    throw new error_1.OpenAIError(`missing output at index ${event.output_index}`);
                }
                if (output.type === 'function_call') {
                    output.arguments += event.delta;
                }
                break;
            }
            case 'response.completed': {
                tslib_1.__classPrivateFieldSet(this, _ResponseStream_currentResponseSnapshot, event.response, "f");
                break;
            }
        }
        return snapshot;
    }, Symbol.asyncIterator)]() {
        const pushQueue = [];
        const readQueue = [];
        let done = false;
        this.on('event', (event) => {
            const reader = readQueue.shift();
            if (reader) {
                reader.resolve(event);
            }
            else {
                pushQueue.push(event);
            }
        });
        this.on('end', () => {
            done = true;
            for (const reader of readQueue) {
                reader.resolve(undefined);
            }
            readQueue.length = 0;
        });
        this.on('abort', (err) => {
            done = true;
            for (const reader of readQueue) {
                reader.reject(err);
            }
            readQueue.length = 0;
        });
        this.on('error', (err) => {
            done = true;
            for (const reader of readQueue) {
                reader.reject(err);
            }
            readQueue.length = 0;
        });
        return {
            next: async () => {
                if (!pushQueue.length) {
                    if (done) {
                        return { value: undefined, done: true };
                    }
                    return new Promise((resolve, reject) => readQueue.push({ resolve, reject })).then((event) => (event ? { value: event, done: false } : { value: undefined, done: true }));
                }
                const event = pushQueue.shift();
                return { value: event, done: false };
            },
            return: async () => {
                this.abort();
                return { value: undefined, done: true };
            },
        };
    }
    /**
     * @returns a promise that resolves with the final Response, or rejects
     * if an error occurred or the stream ended prematurely without producing a REsponse.
     */
    async finalResponse() {
        await this.done();
        const response = tslib_1.__classPrivateFieldGet(this, _ResponseStream_finalResponse, "f");
        if (!response)
            throw new error_1.OpenAIError('stream ended without producing a ChatCompletion');
        return response;
    }
}
exports.ResponseStream = ResponseStream;
function finalizeResponse(snapshot, params) {
    return (0, ResponsesParser_1.maybeParseResponse)(snapshot, params);
}
//# sourceMappingURL=ResponseStream.js.map