cui-server/dist/services/json-lines-parser.js

Web UI Agent Platform based on Claude Code

import { Transform } from 'stream';
/**
 * Parses newline-delimited JSON (JSONL) stream
 */
export class JsonLinesParser extends Transform {
    buffer = '';
    constructor() {
        super({ objectMode: true });
    }
    _transform(chunk, encoding, callback) {
        // Append new data to buffer
        this.buffer += chunk.toString();
        // Split by newlines but keep last incomplete line in buffer
        const lines = this.buffer.split('\n');
        this.buffer = lines.pop() || '';
        // Parse each complete line
        for (const line of lines) {
            if (line.trim()) {
                try {
                    const parsed = JSON.parse(line);
                    this.push(parsed);
                }
                catch (_error) {
                    this.emit('error', new Error(`Invalid JSON: ${line}`));
                }
            }
        }
        callback();
    }
    _flush(callback) {
        // Process any remaining data when stream ends
        if (this.buffer.trim()) {
            try {
                const parsed = JSON.parse(this.buffer);
                this.push(parsed);
            }
            catch (_error) {
                this.emit('error', new Error(`Invalid JSON: ${this.buffer}`));
            }
        }
        callback();
    }
    /**
     * Reset the parser state
     */
    reset() {
        this.buffer = '';
    }
    /**
     * Get current buffer content (for debugging)
     */
    getBuffer() {
        return this.buffer;
    }
}
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