493 lines
25 KiB
JavaScript
493 lines
25 KiB
JavaScript
"use strict";
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var _ChatCompletionStream_instances, _ChatCompletionStream_params, _ChatCompletionStream_choiceEventStates, _ChatCompletionStream_currentChatCompletionSnapshot, _ChatCompletionStream_beginRequest, _ChatCompletionStream_getChoiceEventState, _ChatCompletionStream_addChunk, _ChatCompletionStream_emitToolCallDoneEvent, _ChatCompletionStream_emitContentDoneEvents, _ChatCompletionStream_endRequest, _ChatCompletionStream_getAutoParseableResponseFormat, _ChatCompletionStream_accumulateChatCompletion;
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ChatCompletionStream = void 0;
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const tslib_1 = require("../internal/tslib.js");
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const parser_1 = require("../_vendor/partial-json-parser/parser.js");
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const error_1 = require("../error.js");
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const parser_2 = require("../lib/parser.js");
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const streaming_1 = require("../streaming.js");
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const AbstractChatCompletionRunner_1 = require("./AbstractChatCompletionRunner.js");
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class ChatCompletionStream extends AbstractChatCompletionRunner_1.AbstractChatCompletionRunner {
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constructor(params) {
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super();
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_ChatCompletionStream_instances.add(this);
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_ChatCompletionStream_params.set(this, void 0);
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_ChatCompletionStream_choiceEventStates.set(this, void 0);
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_ChatCompletionStream_currentChatCompletionSnapshot.set(this, void 0);
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tslib_1.__classPrivateFieldSet(this, _ChatCompletionStream_params, params, "f");
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tslib_1.__classPrivateFieldSet(this, _ChatCompletionStream_choiceEventStates, [], "f");
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}
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get currentChatCompletionSnapshot() {
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return tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_currentChatCompletionSnapshot, "f");
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}
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/**
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* Intended for use on the frontend, consuming a stream produced with
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* `.toReadableStream()` on the backend.
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*
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* Note that messages sent to the model do not appear in `.on('message')`
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* in this context.
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*/
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static fromReadableStream(stream) {
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const runner = new ChatCompletionStream(null);
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runner._run(() => runner._fromReadableStream(stream));
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return runner;
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}
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static createChatCompletion(client, params, options) {
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const runner = new ChatCompletionStream(params);
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runner._run(() => runner._runChatCompletion(client, { ...params, stream: true }, { ...options, headers: { ...options?.headers, 'X-Stainless-Helper-Method': 'stream' } }));
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return runner;
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}
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async _createChatCompletion(client, params, options) {
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super._createChatCompletion;
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const signal = options?.signal;
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if (signal) {
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if (signal.aborted)
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this.controller.abort();
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signal.addEventListener('abort', () => this.controller.abort());
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}
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tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_beginRequest).call(this);
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const stream = await client.chat.completions.create({ ...params, stream: true }, { ...options, signal: this.controller.signal });
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this._connected();
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for await (const chunk of stream) {
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tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_addChunk).call(this, chunk);
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}
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if (stream.controller.signal?.aborted) {
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throw new error_1.APIUserAbortError();
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}
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return this._addChatCompletion(tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_endRequest).call(this));
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}
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async _fromReadableStream(readableStream, options) {
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const signal = options?.signal;
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if (signal) {
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if (signal.aborted)
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this.controller.abort();
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signal.addEventListener('abort', () => this.controller.abort());
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}
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tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_beginRequest).call(this);
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this._connected();
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const stream = streaming_1.Stream.fromReadableStream(readableStream, this.controller);
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let chatId;
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for await (const chunk of stream) {
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if (chatId && chatId !== chunk.id) {
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// A new request has been made.
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this._addChatCompletion(tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_endRequest).call(this));
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}
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tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_addChunk).call(this, chunk);
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chatId = chunk.id;
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}
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if (stream.controller.signal?.aborted) {
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throw new error_1.APIUserAbortError();
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}
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return this._addChatCompletion(tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_endRequest).call(this));
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}
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[(_ChatCompletionStream_params = new WeakMap(), _ChatCompletionStream_choiceEventStates = new WeakMap(), _ChatCompletionStream_currentChatCompletionSnapshot = new WeakMap(), _ChatCompletionStream_instances = new WeakSet(), _ChatCompletionStream_beginRequest = function _ChatCompletionStream_beginRequest() {
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if (this.ended)
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return;
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tslib_1.__classPrivateFieldSet(this, _ChatCompletionStream_currentChatCompletionSnapshot, undefined, "f");
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}, _ChatCompletionStream_getChoiceEventState = function _ChatCompletionStream_getChoiceEventState(choice) {
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let state = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_choiceEventStates, "f")[choice.index];
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if (state) {
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return state;
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}
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state = {
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content_done: false,
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refusal_done: false,
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logprobs_content_done: false,
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logprobs_refusal_done: false,
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done_tool_calls: new Set(),
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current_tool_call_index: null,
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};
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tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_choiceEventStates, "f")[choice.index] = state;
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return state;
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}, _ChatCompletionStream_addChunk = function _ChatCompletionStream_addChunk(chunk) {
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if (this.ended)
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return;
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const completion = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_accumulateChatCompletion).call(this, chunk);
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this._emit('chunk', chunk, completion);
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for (const choice of chunk.choices) {
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const choiceSnapshot = completion.choices[choice.index];
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if (choice.delta.content != null &&
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choiceSnapshot.message?.role === 'assistant' &&
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choiceSnapshot.message?.content) {
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this._emit('content', choice.delta.content, choiceSnapshot.message.content);
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this._emit('content.delta', {
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delta: choice.delta.content,
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snapshot: choiceSnapshot.message.content,
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parsed: choiceSnapshot.message.parsed,
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});
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}
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if (choice.delta.refusal != null &&
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choiceSnapshot.message?.role === 'assistant' &&
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choiceSnapshot.message?.refusal) {
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this._emit('refusal.delta', {
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delta: choice.delta.refusal,
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snapshot: choiceSnapshot.message.refusal,
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});
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}
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if (choice.logprobs?.content != null && choiceSnapshot.message?.role === 'assistant') {
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this._emit('logprobs.content.delta', {
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content: choice.logprobs?.content,
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snapshot: choiceSnapshot.logprobs?.content ?? [],
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});
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}
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if (choice.logprobs?.refusal != null && choiceSnapshot.message?.role === 'assistant') {
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this._emit('logprobs.refusal.delta', {
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refusal: choice.logprobs?.refusal,
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snapshot: choiceSnapshot.logprobs?.refusal ?? [],
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});
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}
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const state = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getChoiceEventState).call(this, choiceSnapshot);
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if (choiceSnapshot.finish_reason) {
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tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_emitContentDoneEvents).call(this, choiceSnapshot);
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if (state.current_tool_call_index != null) {
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tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_emitToolCallDoneEvent).call(this, choiceSnapshot, state.current_tool_call_index);
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}
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}
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for (const toolCall of choice.delta.tool_calls ?? []) {
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if (state.current_tool_call_index !== toolCall.index) {
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tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_emitContentDoneEvents).call(this, choiceSnapshot);
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// new tool call started, the previous one is done
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if (state.current_tool_call_index != null) {
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tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_emitToolCallDoneEvent).call(this, choiceSnapshot, state.current_tool_call_index);
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}
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}
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state.current_tool_call_index = toolCall.index;
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}
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for (const toolCallDelta of choice.delta.tool_calls ?? []) {
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const toolCallSnapshot = choiceSnapshot.message.tool_calls?.[toolCallDelta.index];
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if (!toolCallSnapshot?.type) {
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continue;
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}
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if (toolCallSnapshot?.type === 'function') {
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this._emit('tool_calls.function.arguments.delta', {
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name: toolCallSnapshot.function?.name,
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index: toolCallDelta.index,
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arguments: toolCallSnapshot.function.arguments,
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parsed_arguments: toolCallSnapshot.function.parsed_arguments,
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arguments_delta: toolCallDelta.function?.arguments ?? '',
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});
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}
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else {
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assertNever(toolCallSnapshot?.type);
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}
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}
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}
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}, _ChatCompletionStream_emitToolCallDoneEvent = function _ChatCompletionStream_emitToolCallDoneEvent(choiceSnapshot, toolCallIndex) {
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const state = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getChoiceEventState).call(this, choiceSnapshot);
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if (state.done_tool_calls.has(toolCallIndex)) {
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// we've already fired the done event
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return;
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}
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const toolCallSnapshot = choiceSnapshot.message.tool_calls?.[toolCallIndex];
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if (!toolCallSnapshot) {
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throw new Error('no tool call snapshot');
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}
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if (!toolCallSnapshot.type) {
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throw new Error('tool call snapshot missing `type`');
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}
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if (toolCallSnapshot.type === 'function') {
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const inputTool = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_params, "f")?.tools?.find((tool) => (0, parser_2.isChatCompletionFunctionTool)(tool) && tool.function.name === toolCallSnapshot.function.name); // TS doesn't narrow based on isChatCompletionTool
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this._emit('tool_calls.function.arguments.done', {
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name: toolCallSnapshot.function.name,
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index: toolCallIndex,
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arguments: toolCallSnapshot.function.arguments,
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parsed_arguments: (0, parser_2.isAutoParsableTool)(inputTool) ? inputTool.$parseRaw(toolCallSnapshot.function.arguments)
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: inputTool?.function.strict ? JSON.parse(toolCallSnapshot.function.arguments)
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: null,
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});
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}
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else {
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assertNever(toolCallSnapshot.type);
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}
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}, _ChatCompletionStream_emitContentDoneEvents = function _ChatCompletionStream_emitContentDoneEvents(choiceSnapshot) {
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const state = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getChoiceEventState).call(this, choiceSnapshot);
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if (choiceSnapshot.message.content && !state.content_done) {
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state.content_done = true;
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const responseFormat = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getAutoParseableResponseFormat).call(this);
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this._emit('content.done', {
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content: choiceSnapshot.message.content,
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parsed: responseFormat ? responseFormat.$parseRaw(choiceSnapshot.message.content) : null,
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});
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}
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if (choiceSnapshot.message.refusal && !state.refusal_done) {
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state.refusal_done = true;
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this._emit('refusal.done', { refusal: choiceSnapshot.message.refusal });
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}
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if (choiceSnapshot.logprobs?.content && !state.logprobs_content_done) {
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state.logprobs_content_done = true;
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this._emit('logprobs.content.done', { content: choiceSnapshot.logprobs.content });
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}
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if (choiceSnapshot.logprobs?.refusal && !state.logprobs_refusal_done) {
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state.logprobs_refusal_done = true;
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this._emit('logprobs.refusal.done', { refusal: choiceSnapshot.logprobs.refusal });
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}
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}, _ChatCompletionStream_endRequest = function _ChatCompletionStream_endRequest() {
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if (this.ended) {
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throw new error_1.OpenAIError(`stream has ended, this shouldn't happen`);
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}
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const snapshot = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_currentChatCompletionSnapshot, "f");
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if (!snapshot) {
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throw new error_1.OpenAIError(`request ended without sending any chunks`);
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}
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tslib_1.__classPrivateFieldSet(this, _ChatCompletionStream_currentChatCompletionSnapshot, undefined, "f");
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tslib_1.__classPrivateFieldSet(this, _ChatCompletionStream_choiceEventStates, [], "f");
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return finalizeChatCompletion(snapshot, tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_params, "f"));
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}, _ChatCompletionStream_getAutoParseableResponseFormat = function _ChatCompletionStream_getAutoParseableResponseFormat() {
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const responseFormat = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_params, "f")?.response_format;
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if ((0, parser_2.isAutoParsableResponseFormat)(responseFormat)) {
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return responseFormat;
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}
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return null;
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}, _ChatCompletionStream_accumulateChatCompletion = function _ChatCompletionStream_accumulateChatCompletion(chunk) {
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var _a, _b, _c, _d;
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let snapshot = tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_currentChatCompletionSnapshot, "f");
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const { choices, ...rest } = chunk;
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if (!snapshot) {
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snapshot = tslib_1.__classPrivateFieldSet(this, _ChatCompletionStream_currentChatCompletionSnapshot, {
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...rest,
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choices: [],
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}, "f");
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}
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else {
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Object.assign(snapshot, rest);
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}
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for (const { delta, finish_reason, index, logprobs = null, ...other } of chunk.choices) {
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let choice = snapshot.choices[index];
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if (!choice) {
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choice = snapshot.choices[index] = { finish_reason, index, message: {}, logprobs, ...other };
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}
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if (logprobs) {
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if (!choice.logprobs) {
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choice.logprobs = Object.assign({}, logprobs);
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}
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else {
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const { content, refusal, ...rest } = logprobs;
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assertIsEmpty(rest);
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Object.assign(choice.logprobs, rest);
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if (content) {
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(_a = choice.logprobs).content ?? (_a.content = []);
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choice.logprobs.content.push(...content);
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}
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if (refusal) {
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(_b = choice.logprobs).refusal ?? (_b.refusal = []);
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choice.logprobs.refusal.push(...refusal);
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}
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}
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}
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if (finish_reason) {
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choice.finish_reason = finish_reason;
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if (tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_params, "f") && (0, parser_2.hasAutoParseableInput)(tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_params, "f"))) {
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if (finish_reason === 'length') {
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throw new error_1.LengthFinishReasonError();
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}
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if (finish_reason === 'content_filter') {
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throw new error_1.ContentFilterFinishReasonError();
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}
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}
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}
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Object.assign(choice, other);
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if (!delta)
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continue; // Shouldn't happen; just in case.
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const { content, refusal, function_call, role, tool_calls, ...rest } = delta;
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assertIsEmpty(rest);
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Object.assign(choice.message, rest);
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if (refusal) {
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choice.message.refusal = (choice.message.refusal || '') + refusal;
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}
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if (role)
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choice.message.role = role;
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if (function_call) {
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if (!choice.message.function_call) {
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choice.message.function_call = function_call;
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}
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else {
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if (function_call.name)
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choice.message.function_call.name = function_call.name;
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if (function_call.arguments) {
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(_c = choice.message.function_call).arguments ?? (_c.arguments = '');
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choice.message.function_call.arguments += function_call.arguments;
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}
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}
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}
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if (content) {
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choice.message.content = (choice.message.content || '') + content;
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if (!choice.message.refusal && tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getAutoParseableResponseFormat).call(this)) {
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choice.message.parsed = (0, parser_1.partialParse)(choice.message.content);
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}
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}
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if (tool_calls) {
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if (!choice.message.tool_calls)
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choice.message.tool_calls = [];
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for (const { index, id, type, function: fn, ...rest } of tool_calls) {
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const tool_call = ((_d = choice.message.tool_calls)[index] ?? (_d[index] = {}));
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Object.assign(tool_call, rest);
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if (id)
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tool_call.id = id;
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if (type)
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tool_call.type = type;
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if (fn)
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tool_call.function ?? (tool_call.function = { name: fn.name ?? '', arguments: '' });
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if (fn?.name)
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tool_call.function.name = fn.name;
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if (fn?.arguments) {
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tool_call.function.arguments += fn.arguments;
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if ((0, parser_2.shouldParseToolCall)(tslib_1.__classPrivateFieldGet(this, _ChatCompletionStream_params, "f"), tool_call)) {
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tool_call.function.parsed_arguments = (0, parser_1.partialParse)(tool_call.function.arguments);
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}
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}
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}
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}
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}
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return snapshot;
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}, Symbol.asyncIterator)]() {
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const pushQueue = [];
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const readQueue = [];
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let done = false;
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this.on('chunk', (chunk) => {
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const reader = readQueue.shift();
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if (reader) {
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reader.resolve(chunk);
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}
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else {
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pushQueue.push(chunk);
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}
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});
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this.on('end', () => {
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done = true;
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for (const reader of readQueue) {
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reader.resolve(undefined);
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}
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readQueue.length = 0;
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});
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this.on('abort', (err) => {
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done = true;
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for (const reader of readQueue) {
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reader.reject(err);
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}
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readQueue.length = 0;
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});
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this.on('error', (err) => {
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done = true;
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for (const reader of readQueue) {
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reader.reject(err);
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}
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readQueue.length = 0;
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});
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return {
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next: async () => {
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if (!pushQueue.length) {
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if (done) {
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return { value: undefined, done: true };
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}
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return new Promise((resolve, reject) => readQueue.push({ resolve, reject })).then((chunk) => (chunk ? { value: chunk, done: false } : { value: undefined, done: true }));
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}
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const chunk = pushQueue.shift();
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return { value: chunk, done: false };
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},
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return: async () => {
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this.abort();
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return { value: undefined, done: true };
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},
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};
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}
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toReadableStream() {
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const stream = new streaming_1.Stream(this[Symbol.asyncIterator].bind(this), this.controller);
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return stream.toReadableStream();
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}
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}
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exports.ChatCompletionStream = ChatCompletionStream;
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function finalizeChatCompletion(snapshot, params) {
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const { id, choices, created, model, system_fingerprint, ...rest } = snapshot;
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const completion = {
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...rest,
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id,
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choices: choices.map(({ message, finish_reason, index, logprobs, ...choiceRest }) => {
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if (!finish_reason) {
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throw new error_1.OpenAIError(`missing finish_reason for choice ${index}`);
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}
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const { content = null, function_call, tool_calls, ...messageRest } = message;
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const role = message.role; // this is what we expect; in theory it could be different which would make our types a slight lie but would be fine.
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if (!role) {
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throw new error_1.OpenAIError(`missing role for choice ${index}`);
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}
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if (function_call) {
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const { arguments: args, name } = function_call;
|
|
if (args == null) {
|
|
throw new error_1.OpenAIError(`missing function_call.arguments for choice ${index}`);
|
|
}
|
|
if (!name) {
|
|
throw new error_1.OpenAIError(`missing function_call.name for choice ${index}`);
|
|
}
|
|
return {
|
|
...choiceRest,
|
|
message: {
|
|
content,
|
|
function_call: { arguments: args, name },
|
|
role,
|
|
refusal: message.refusal ?? null,
|
|
},
|
|
finish_reason,
|
|
index,
|
|
logprobs,
|
|
};
|
|
}
|
|
if (tool_calls) {
|
|
return {
|
|
...choiceRest,
|
|
index,
|
|
finish_reason,
|
|
logprobs,
|
|
message: {
|
|
...messageRest,
|
|
role,
|
|
content,
|
|
refusal: message.refusal ?? null,
|
|
tool_calls: tool_calls.map((tool_call, i) => {
|
|
const { function: fn, type, id, ...toolRest } = tool_call;
|
|
const { arguments: args, name, ...fnRest } = fn || {};
|
|
if (id == null) {
|
|
throw new error_1.OpenAIError(`missing choices[${index}].tool_calls[${i}].id\n${str(snapshot)}`);
|
|
}
|
|
if (type == null) {
|
|
throw new error_1.OpenAIError(`missing choices[${index}].tool_calls[${i}].type\n${str(snapshot)}`);
|
|
}
|
|
if (name == null) {
|
|
throw new error_1.OpenAIError(`missing choices[${index}].tool_calls[${i}].function.name\n${str(snapshot)}`);
|
|
}
|
|
if (args == null) {
|
|
throw new error_1.OpenAIError(`missing choices[${index}].tool_calls[${i}].function.arguments\n${str(snapshot)}`);
|
|
}
|
|
return { ...toolRest, id, type, function: { ...fnRest, name, arguments: args } };
|
|
}),
|
|
},
|
|
};
|
|
}
|
|
return {
|
|
...choiceRest,
|
|
message: { ...messageRest, content, role, refusal: message.refusal ?? null },
|
|
finish_reason,
|
|
index,
|
|
logprobs,
|
|
};
|
|
}),
|
|
created,
|
|
model,
|
|
object: 'chat.completion',
|
|
...(system_fingerprint ? { system_fingerprint } : {}),
|
|
};
|
|
return (0, parser_2.maybeParseChatCompletion)(completion, params);
|
|
}
|
|
function str(x) {
|
|
return JSON.stringify(x);
|
|
}
|
|
/**
|
|
* Ensures the given argument is an empty object, useful for
|
|
* asserting that all known properties on an object have been
|
|
* destructured.
|
|
*/
|
|
function assertIsEmpty(obj) {
|
|
return;
|
|
}
|
|
function assertNever(_x) { }
|
|
//# sourceMappingURL=ChatCompletionStream.js.map
|