/opt/canhelp/node_modules/openai/lib
Edit: /opt/canhelp/node_modules/openai/lib/ChatCompletionStream.mjs (25240B)
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;
import { __classPrivateFieldGet, __classPrivateFieldSet } from "../internal/tslib.mjs";
import { partialParse } from "../_vendor/partial-json-parser/parser.mjs";
import { APIUserAbortError, ContentFilterFinishReasonError, LengthFinishReasonError, OpenAIError, } from "../error.mjs";
import { hasAutoParseableInput, isAutoParsableResponseFormat, isAutoParsableTool, isChatCompletionFunctionTool, maybeParseChatCompletion, shouldParseToolCall, } from "../lib/parser.mjs";
import { Stream } from "../streaming.mjs";
import { AbstractChatCompletionRunner, } from "./AbstractChatCompletionRunner.mjs";
export class ChatCompletionStream extends AbstractChatCompletionRunner {
constructor(params) {
super();
_ChatCompletionStream_instances.add(this);
_ChatCompletionStream_params.set(this, void 0);
_ChatCompletionStream_choiceEventStates.set(this, void 0);
_ChatCompletionStream_currentChatCompletionSnapshot.set(this, void 0);
__classPrivateFieldSet(this, _ChatCompletionStream_params, params, "f");
__classPrivateFieldSet(this, _ChatCompletionStream_choiceEventStates, [], "f");
}
get currentChatCompletionSnapshot() {
return __classPrivateFieldGet(this, _ChatCompletionStream_currentChatCompletionSnapshot, "f");
}
/**
* Intended for use on the frontend, consuming a stream produced with
* `.toReadableStream()` on the backend.
*
* Note that messages sent to the model do not appear in `.on('message')`
* in this context.
*/
static fromReadableStream(stream) {
const runner = new ChatCompletionStream(null);
runner._run(() => runner._fromReadableStream(stream));
return runner;
}
static createChatCompletion(client, params, options) {
const runner = new ChatCompletionStream(params);
runner._run(() => runner._runChatCompletion(client, { ...params, stream: true }, { ...options, headers: { ...options?.headers, 'X-Stainless-Helper-Method': 'stream' } }));
return runner;
}
async _createChatCompletion(client, params, options) {
super._createChatCompletion;
const signal = options?.signal;
if (signal) {
if (signal.aborted)
this.controller.abort();
signal.addEventListener('abort', () => this.controller.abort());
}
__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_beginRequest).call(this);
const stream = await client.chat.completions.create({ ...params, stream: true }, { ...options, signal: this.controller.signal });
this._connected();
for await (const chunk of stream) {
__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_addChunk).call(this, chunk);
}
if (stream.controller.signal?.aborted) {
throw new APIUserAbortError();
}
return this._addChatCompletion(__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_endRequest).call(this));
}
async _fromReadableStream(readableStream, options) {
const signal = options?.signal;
if (signal) {
if (signal.aborted)
this.controller.abort();
signal.addEventListener('abort', () => this.controller.abort());
}
__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_beginRequest).call(this);
this._connected();
const stream = Stream.fromReadableStream(readableStream, this.controller);
let chatId;
for await (const chunk of stream) {
if (chatId && chatId !== chunk.id) {
// A new request has been made.
this._addChatCompletion(__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_endRequest).call(this));
}
__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_addChunk).call(this, chunk);
chatId = chunk.id;
}
if (stream.controller.signal?.aborted) {
throw new APIUserAbortError();
}
return this._addChatCompletion(__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_endRequest).call(this));
}
[(_ChatCompletionStream_params = new WeakMap(), _ChatCompletionStream_choiceEventStates = new WeakMap(), _ChatCompletionStream_currentChatCompletionSnapshot = new WeakMap(), _ChatCompletionStream_instances = new WeakSet(), _ChatCompletionStream_beginRequest = function _ChatCompletionStream_beginRequest() {
if (this.ended)
return;
__classPrivateFieldSet(this, _ChatCompletionStream_currentChatCompletionSnapshot, undefined, "f");
}, _ChatCompletionStream_getChoiceEventState = function _ChatCompletionStream_getChoiceEventState(choice) {
let state = __classPrivateFieldGet(this, _ChatCompletionStream_choiceEventStates, "f")[choice.index];
if (state) {
return state;
}
state = {
content_done: false,
refusal_done: false,
logprobs_content_done: false,
logprobs_refusal_done: false,
done_tool_calls: new Set(),
current_tool_call_index: null,
};
__classPrivateFieldGet(this, _ChatCompletionStream_choiceEventStates, "f")[choice.index] = state;
return state;
}, _ChatCompletionStream_addChunk = function _ChatCompletionStream_addChunk(chunk) {
if (this.ended)
return;
const completion = __classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_accumulateChatCompletion).call(this, chunk);
this._emit('chunk', chunk, completion);
for (const choice of chunk.choices) {
const choiceSnapshot = completion.choices[choice.index];
if (choice.delta.content != null &&
choiceSnapshot.message?.role === 'assistant' &&
choiceSnapshot.message?.content) {
this._emit('content', choice.delta.content, choiceSnapshot.message.content);
this._emit('content.delta', {
delta: choice.delta.content,
snapshot: choiceSnapshot.message.content,
parsed: choiceSnapshot.message.parsed,
});
}
if (choice.delta.refusal != null &&
choiceSnapshot.message?.role === 'assistant' &&
choiceSnapshot.message?.refusal) {
this._emit('refusal.delta', {
delta: choice.delta.refusal,
snapshot: choiceSnapshot.message.refusal,
});
}
if (choice.logprobs?.content != null && choiceSnapshot.message?.role === 'assistant') {
this._emit('logprobs.content.delta', {
content: choice.logprobs?.content,
snapshot: choiceSnapshot.logprobs?.content ?? [],
});
}
if (choice.logprobs?.refusal != null && choiceSnapshot.message?.role === 'assistant') {
this._emit('logprobs.refusal.delta', {
refusal: choice.logprobs?.refusal,
snapshot: choiceSnapshot.logprobs?.refusal ?? [],
});
}
const state = __classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getChoiceEventState).call(this, choiceSnapshot);
if (choiceSnapshot.finish_reason) {
__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_emitContentDoneEvents).call(this, choiceSnapshot);
if (state.current_tool_call_index != null) {
__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_emitToolCallDoneEvent).call(this, choiceSnapshot, state.current_tool_call_index);
}
}
for (const toolCall of choice.delta.tool_calls ?? []) {
if (state.current_tool_call_index !== toolCall.index) {
__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_emitContentDoneEvents).call(this, choiceSnapshot);
// new tool call started, the previous one is done
if (state.current_tool_call_index != null) {
__classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_emitToolCallDoneEvent).call(this, choiceSnapshot, state.current_tool_call_index);
}
}
state.current_tool_call_index = toolCall.index;
}
for (const toolCallDelta of choice.delta.tool_calls ?? []) {
const toolCallSnapshot = choiceSnapshot.message.tool_calls?.[toolCallDelta.index];
if (!toolCallSnapshot?.type) {
continue;
}
if (toolCallSnapshot?.type === 'function') {
this._emit('tool_calls.function.arguments.delta', {
name: toolCallSnapshot.function?.name,
index: toolCallDelta.index,
arguments: toolCallSnapshot.function.arguments,
parsed_arguments: toolCallSnapshot.function.parsed_arguments,
arguments_delta: toolCallDelta.function?.arguments ?? '',
});
}
else {
assertNever(toolCallSnapshot?.type);
}
}
}
}, _ChatCompletionStream_emitToolCallDoneEvent = function _ChatCompletionStream_emitToolCallDoneEvent(choiceSnapshot, toolCallIndex) {
const state = __classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getChoiceEventState).call(this, choiceSnapshot);
if (state.done_tool_calls.has(toolCallIndex)) {
// we've already fired the done event
return;
}
const toolCallSnapshot = choiceSnapshot.message.tool_calls?.[toolCallIndex];
if (!toolCallSnapshot) {
throw new Error('no tool call snapshot');
}
if (!toolCallSnapshot.type) {
throw new Error('tool call snapshot missing `type`');
}
if (toolCallSnapshot.type === 'function') {
const inputTool = __classPrivateFieldGet(this, _ChatCompletionStream_params, "f")?.tools?.find((tool) => isChatCompletionFunctionTool(tool) && tool.function.name === toolCallSnapshot.function.name); // TS doesn't narrow based on isChatCompletionTool
this._emit('tool_calls.function.arguments.done', {
name: toolCallSnapshot.function.name,
index: toolCallIndex,
arguments: toolCallSnapshot.function.arguments,
parsed_arguments: isAutoParsableTool(inputTool) ? inputTool.$parseRaw(toolCallSnapshot.function.arguments)
: inputTool?.function.strict ? JSON.parse(toolCallSnapshot.function.arguments)
: null,
});
}
else {
assertNever(toolCallSnapshot.type);
}
}, _ChatCompletionStream_emitContentDoneEvents = function _ChatCompletionStream_emitContentDoneEvents(choiceSnapshot) {
const state = __classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getChoiceEventState).call(this, choiceSnapshot);
if (choiceSnapshot.message.content && !state.content_done) {
state.content_done = true;
const responseFormat = __classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getAutoParseableResponseFormat).call(this);
this._emit('content.done', {
content: choiceSnapshot.message.content,
parsed: responseFormat ? responseFormat.$parseRaw(choiceSnapshot.message.content) : null,
});
}
if (choiceSnapshot.message.refusal && !state.refusal_done) {
state.refusal_done = true;
this._emit('refusal.done', { refusal: choiceSnapshot.message.refusal });
}
if (choiceSnapshot.logprobs?.content && !state.logprobs_content_done) {
state.logprobs_content_done = true;
this._emit('logprobs.content.done', { content: choiceSnapshot.logprobs.content });
}
if (choiceSnapshot.logprobs?.refusal && !state.logprobs_refusal_done) {
state.logprobs_refusal_done = true;
this._emit('logprobs.refusal.done', { refusal: choiceSnapshot.logprobs.refusal });
}
}, _ChatCompletionStream_endRequest = function _ChatCompletionStream_endRequest() {
if (this.ended) {
throw new OpenAIError(`stream has ended, this shouldn't happen`);
}
const snapshot = __classPrivateFieldGet(this, _ChatCompletionStream_currentChatCompletionSnapshot, "f");
if (!snapshot) {
throw new OpenAIError(`request ended without sending any chunks`);
}
__classPrivateFieldSet(this, _ChatCompletionStream_currentChatCompletionSnapshot, undefined, "f");
__classPrivateFieldSet(this, _ChatCompletionStream_choiceEventStates, [], "f");
return finalizeChatCompletion(snapshot, __classPrivateFieldGet(this, _ChatCompletionStream_params, "f"));
}, _ChatCompletionStream_getAutoParseableResponseFormat = function _ChatCompletionStream_getAutoParseableResponseFormat() {
const responseFormat = __classPrivateFieldGet(this, _ChatCompletionStream_params, "f")?.response_format;
if (isAutoParsableResponseFormat(responseFormat)) {
return responseFormat;
}
return null;
}, _ChatCompletionStream_accumulateChatCompletion = function _ChatCompletionStream_accumulateChatCompletion(chunk) {
var _a, _b, _c, _d;
let snapshot = __classPrivateFieldGet(this, _ChatCompletionStream_currentChatCompletionSnapshot, "f");
const { choices, ...rest } = chunk;
if (!snapshot) {
snapshot = __classPrivateFieldSet(this, _ChatCompletionStream_currentChatCompletionSnapshot, {
...rest,
choices: [],
}, "f");
}
else {
Object.assign(snapshot, rest);
}
for (const { delta, finish_reason, index, logprobs = null, ...other } of chunk.choices) {
let choice = snapshot.choices[index];
if (!choice) {
choice = snapshot.choices[index] = { finish_reason, index, message: {}, logprobs, ...other };
}
if (logprobs) {
if (!choice.logprobs) {
choice.logprobs = Object.assign({}, logprobs);
}
else {
const { content, refusal, ...rest } = logprobs;
assertIsEmpty(rest);
Object.assign(choice.logprobs, rest);
if (content) {
(_a = choice.logprobs).content ?? (_a.content = []);
choice.logprobs.content.push(...content);
}
if (refusal) {
(_b = choice.logprobs).refusal ?? (_b.refusal = []);
choice.logprobs.refusal.push(...refusal);
}
}
}
if (finish_reason) {
choice.finish_reason = finish_reason;
if (__classPrivateFieldGet(this, _ChatCompletionStream_params, "f") && hasAutoParseableInput(__classPrivateFieldGet(this, _ChatCompletionStream_params, "f"))) {
if (finish_reason === 'length') {
throw new LengthFinishReasonError();
}
if (finish_reason === 'content_filter') {
throw new ContentFilterFinishReasonError();
}
}
}
Object.assign(choice, other);
if (!delta)
continue; // Shouldn't happen; just in case.
const { content, refusal, function_call, role, tool_calls, ...rest } = delta;
assertIsEmpty(rest);
Object.assign(choice.message, rest);
if (refusal) {
choice.message.refusal = (choice.message.refusal || '') + refusal;
}
if (role)
choice.message.role = role;
if (function_call) {
if (!choice.message.function_call) {
choice.message.function_call = function_call;
}
else {
if (function_call.name)
choice.message.function_call.name = function_call.name;
if (function_call.arguments) {
(_c = choice.message.function_call).arguments ?? (_c.arguments = '');
choice.message.function_call.arguments += function_call.arguments;
}
}
}
if (content) {
choice.message.content = (choice.message.content || '') + content;
if (!choice.message.refusal && __classPrivateFieldGet(this, _ChatCompletionStream_instances, "m", _ChatCompletionStream_getAutoParseableResponseFormat).call(this)) {
choice.message.parsed = partialParse(choice.message.content);
}
}
if (tool_calls) {
if (!choice.message.tool_calls)
choice.message.tool_calls = [];
for (const { index, id, type, function: fn, ...rest } of tool_calls) {
const tool_call = ((_d = choice.message.tool_calls)[index] ?? (_d[index] = {}));
Object.assign(tool_call, rest);
if (id)
tool_call.id = id;
if (type)
tool_call.type = type;
if (fn)
tool_call.function ?? (tool_call.function = { name: fn.name ?? '', arguments: '' });
if (fn?.name)
tool_call.function.name = fn.name;
if (fn?.arguments) {
tool_call.function.arguments += fn.arguments;
if (shouldParseToolCall(__classPrivateFieldGet(this, _ChatCompletionStream_params, "f"), tool_call)) {
tool_call.function.parsed_arguments = partialParse(tool_call.function.arguments);
}
}
}
}
}
return snapshot;
}, Symbol.asyncIterator)]() {
const pushQueue = [];
const readQueue = [];
let done = false;
this.on('chunk', (chunk) => {
const reader = readQueue.shift();
if (reader) {
reader.resolve(chunk);
}
else {
pushQueue.push(chunk);
}
});
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((chunk) => (chunk ? { value: chunk, done: false } : { value: undefined, done: true }));
}
const chunk = pushQueue.shift();
return { value: chunk, done: false };
},
return: async () => {
this.abort();
return { value: undefined, done: true };
},
};
}
toReadableStream() {
const stream = new Stream(this[Symbol.asyncIterator].bind(this), this.controller);
return stream.toReadableStream();
}
}
function finalizeChatCompletion(snapshot, params) {
const { id, choices, created, model, system_fingerprint, ...rest } = snapshot;
const completion = {
...rest,
id,
choices: choices.map(({ message, finish_reason, index, logprobs, ...choiceRest }) => {
if (!finish_reason) {
throw new OpenAIError(`missing finish_reason for choice ${index}`);
}
const { content = null, function_call, tool_calls, ...messageRest } = message;
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.
if (!role) {
throw new OpenAIError(`missing role for choice ${index}`);
}
if (function_call) {
const { arguments: args, name } = function_call;
if (args == null) {
throw new OpenAIError(`missing function_call.arguments for choice ${index}`);
}
if (!name) {
throw new OpenAIError(`missing function_call.name for choice ${index}`);
}
return {
...choiceRest,
message: {
content,
function_call: { arguments: args, name },
role,
refusal: message.refusal ?? null,
},
finish_reason,
index,
logprobs,
};
}
if (tool_calls) {
return {
...choiceRest,
index,
finish_reason,
logprobs,
message: {
...messageRest,
role,
content,
refusal: message.refusal ?? null,
tool_calls: tool_calls.map((tool_call, i) => {
const { function: fn, type, id, ...toolRest } = tool_call;
const { arguments: args, name, ...fnRest } = fn || {};
if (id == null) {
throw new OpenAIError(`missing choices[${index}].tool_calls[${i}].id\n${str(snapshot)}`);
}
if (type == null) {
throw new OpenAIError(`missing choices[${index}].tool_calls[${i}].type\n${str(snapshot)}`);
}
if (name == null) {
throw new OpenAIError(`missing choices[${index}].tool_calls[${i}].function.name\n${str(snapshot)}`);
}
if (args == null) {
throw new 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 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.mjs.map