ravendb/dist/esm/ext/stream-json/utils/Utf8Stream.js

RavenDB client for Node.js

import { Transform } from "node:stream";
import { StringDecoder } from "node:string_decoder";
export class Utf8Stream extends Transform {
    _buffer;
    _stringDecoder;
    constructor(options) {
        super(Object.assign({}, options, { writableObjectMode: false }));
        this._buffer = '';
    }
    _transform(chunk, encoding, callback) {
        if (typeof chunk == 'string') {
            this._transform = this._transformString;
        }
        else {
            this._stringDecoder = new StringDecoder();
            this._transform = this._transformBuffer;
        }
        this._transform(chunk, encoding, callback);
    }
    _transformBuffer(chunk, _, callback) {
        this._buffer += this._stringDecoder.write(chunk);
        this._processBuffer(callback);
    }
    _transformString(chunk, _, callback) {
        this._buffer += chunk.toString();
        this._processBuffer(callback);
    }
    _processBuffer(callback) {
        if (this._buffer) {
            this.push(this._buffer, 'utf8');
            this._buffer = '';
        }
        callback(null);
    }
    _flushInput() {
        // meant to be called from _flush()
        if (this._stringDecoder) {
            this._buffer += this._stringDecoder.end();
        }
    }
    _flush(callback) {
        this._flushInput();
        this._processBuffer(callback);
    }
}
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