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refactor(NODE-4144): remove all symbol properties #4351

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Dec 11, 2024
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15 changes: 6 additions & 9 deletions src/bulk/common.ts
Original file line number Diff line number Diff line change
Expand Up @@ -30,9 +30,6 @@ import {
} from '../utils';
import { WriteConcern } from '../write_concern';

/** @internal */
const kServerError = Symbol('serverError');

/** @public */
export const BatchType = Object.freeze({
INSERT: 1,
Expand Down Expand Up @@ -315,29 +312,29 @@ export interface WriteConcernErrorData {
*/
export class WriteConcernError {
/** @internal */
[kServerError]: WriteConcernErrorData;
private serverError: WriteConcernErrorData;

constructor(error: WriteConcernErrorData) {
this[kServerError] = error;
this.serverError = error;
}

/** Write concern error code. */
get code(): number | undefined {
return this[kServerError].code;
return this.serverError.code;
}

/** Write concern error message. */
get errmsg(): string | undefined {
return this[kServerError].errmsg;
return this.serverError.errmsg;
}

/** Write concern error info. */
get errInfo(): Document | undefined {
return this[kServerError].errInfo;
return this.serverError.errInfo;
}

toJSON(): WriteConcernErrorData {
return this[kServerError];
return this.serverError;
}

toString(): string {
Expand Down
58 changes: 23 additions & 35 deletions src/change_stream.ts
Original file line number Diff line number Diff line change
Expand Up @@ -24,13 +24,6 @@ import type { ServerSessionId } from './sessions';
import { CSOTTimeoutContext, type TimeoutContext } from './timeout';
import { filterOptions, getTopology, type MongoDBNamespace, squashError } from './utils';

/** @internal */
const kCursorStream = Symbol('cursorStream');
/** @internal */
const kClosed = Symbol('closed');
/** @internal */
const kMode = Symbol('mode');

const CHANGE_STREAM_OPTIONS = [
'resumeAfter',
'startAfter',
Expand Down Expand Up @@ -584,14 +577,14 @@ export class ChangeStream<
namespace: MongoDBNamespace;
type: symbol;
/** @internal */
cursor: ChangeStreamCursor<TSchema, TChange>;
private cursor: ChangeStreamCursor<TSchema, TChange>;
streamOptions?: CursorStreamOptions;
/** @internal */
[kCursorStream]?: Readable & AsyncIterable<TChange>;
private cursorStream?: Readable & AsyncIterable<TChange>;
/** @internal */
[kClosed]: boolean;
private isClosed: boolean;
/** @internal */
[kMode]: false | 'iterator' | 'emitter';
private mode: false | 'iterator' | 'emitter';

/** @event */
static readonly RESPONSE = RESPONSE;
Expand Down Expand Up @@ -668,8 +661,8 @@ export class ChangeStream<
// Create contained Change Stream cursor
this.cursor = this._createChangeStreamCursor(options);

this[kClosed] = false;
this[kMode] = false;
this.isClosed = false;
this.mode = false;

// Listen for any `change` listeners being added to ChangeStream
this.on('newListener', eventName => {
Expand All @@ -680,7 +673,7 @@ export class ChangeStream<

this.on('removeListener', eventName => {
if (eventName === 'change' && this.listenerCount('change') === 0 && this.cursor) {
this[kCursorStream]?.removeAllListeners('data');
this.cursorStream?.removeAllListeners('data');
}
});

Expand All @@ -692,11 +685,6 @@ export class ChangeStream<
}
}

/** @internal */
get cursorStream(): (Readable & AsyncIterable<TChange>) | undefined {
return this[kCursorStream];
}

/** The cached resume token that is used to resume after the most recently returned change. */
get resumeToken(): ResumeToken {
return this.cursor?.resumeToken;
Expand Down Expand Up @@ -806,7 +794,7 @@ export class ChangeStream<
}

async *[Symbol.asyncIterator](): AsyncGenerator<TChange, void, void> {
if (this.closed) {
if (this.isClosed) {
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return;
}

Expand All @@ -826,8 +814,8 @@ export class ChangeStream<
}

/** Is the cursor closed */
get closed(): boolean {
return this[kClosed] || this.cursor.closed;
public get closed(): boolean {
return this.isClosed || this.cursor.closed;
}

/**
Expand All @@ -836,7 +824,7 @@ export class ChangeStream<
async close(): Promise<void> {
this.timeoutContext?.clear();
this.timeoutContext = undefined;
this[kClosed] = true;
this.isClosed = true;

const cursor = this.cursor;
try {
Expand All @@ -855,7 +843,7 @@ export class ChangeStream<
* @throws MongoChangeStreamError if the underlying cursor or the change stream is closed
*/
stream(options?: CursorStreamOptions): Readable & AsyncIterable<TChange> {
if (this.closed) {
if (this.isClosed) {
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throw new MongoChangeStreamError(CHANGESTREAM_CLOSED_ERROR);
}

Expand All @@ -865,24 +853,24 @@ export class ChangeStream<

/** @internal */
private _setIsEmitter(): void {
if (this[kMode] === 'iterator') {
if (this.mode === 'iterator') {
// TODO(NODE-3485): Replace with MongoChangeStreamModeError
throw new MongoAPIError(
'ChangeStream cannot be used as an EventEmitter after being used as an iterator'
);
}
this[kMode] = 'emitter';
this.mode = 'emitter';
}

/** @internal */
private _setIsIterator(): void {
if (this[kMode] === 'emitter') {
if (this.mode === 'emitter') {
// TODO(NODE-3485): Replace with MongoChangeStreamModeError
throw new MongoAPIError(
'ChangeStream cannot be used as an iterator after being used as an EventEmitter'
);
}
this[kMode] = 'iterator';
this.mode = 'iterator';
}

/**
Expand Down Expand Up @@ -947,8 +935,8 @@ export class ChangeStream<
/** @internal */
private _streamEvents(cursor: ChangeStreamCursor<TSchema, TChange>): void {
this._setIsEmitter();
const stream = this[kCursorStream] ?? cursor.stream();
this[kCursorStream] = stream;
const stream = this.cursorStream ?? cursor.stream();
this.cursorStream = stream;
stream.on('data', change => {
try {
const processedChange = this._processChange(change);
Expand All @@ -963,18 +951,18 @@ export class ChangeStream<

/** @internal */
private _endStream(): void {
const cursorStream = this[kCursorStream];
const cursorStream = this.cursorStream;
if (cursorStream) {
['data', 'close', 'end', 'error'].forEach(event => cursorStream.removeAllListeners(event));
cursorStream.destroy();
}

this[kCursorStream] = undefined;
this.cursorStream = undefined;
}

/** @internal */
private _processChange(change: TChange | null): TChange {
if (this[kClosed]) {
if (this.isClosed) {
// TODO(NODE-3485): Replace with MongoChangeStreamClosedError
throw new MongoAPIError(CHANGESTREAM_CLOSED_ERROR);
}
Expand Down Expand Up @@ -1002,7 +990,7 @@ export class ChangeStream<
/** @internal */
private _processErrorStreamMode(changeStreamError: AnyError, cursorInitialized: boolean) {
// If the change stream has been closed explicitly, do not process error.
if (this[kClosed]) return;
if (this.isClosed) return;

if (
cursorInitialized &&
Expand Down Expand Up @@ -1034,7 +1022,7 @@ export class ChangeStream<

/** @internal */
private async _processErrorIteratorMode(changeStreamError: AnyError, cursorInitialized: boolean) {
if (this[kClosed]) {
if (this.isClosed) {
// TODO(NODE-3485): Replace with MongoChangeStreamClosedError
throw new MongoAPIError(CHANGESTREAM_CLOSED_ERROR);
}
Expand Down
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