np-express-winston-logger/dist/transports.js

A TypeScript logger for Express using Winston and Elasticsearch

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.createElasticsearchTransport = exports.createConsoleTransport = void 0;
const winston_1 = require("winston");
const winston_elasticsearch_1 = require("winston-elasticsearch");
const log_level_1 = require("./types/log-level");
const createConsoleTransport = (minLevel) => {
    const consoleFormat = winston_1.format.combine(winston_1.format.colorize(), winston_1.format.timestamp({ format: () => new Date().toISOString() }), winston_1.format.errors({ stack: true }), winston_1.format.printf((log) => {
        const { level, message, timestamp, service, stack } = log;
        const splat = log[Symbol.for("splat")] || [];
        const metaString = splat.length
            ? ` ${JSON.stringify(splat[0], null, 2)}`
            : "";
        const stackString = `${stack ? `\n${stack}` : ""} `;
        const reqId = log?.requestId ? `[reqId=${log.requestId}]` : "";
        return `${timestamp} [${level}] ${service}: ${reqId} ${message}: ${stackString} ${metaString}`;
    }));
    return new winston_1.transports.Console({
        handleExceptions: true,
        level: minLevel,
        format: consoleFormat,
    });
};
exports.createConsoleTransport = createConsoleTransport;
const createElasticsearchTransport = ({ url, minLevel, serviceName, }) => {
    const esTransfer = (log) => {
        const { level, message, timestamp, service, stack } = log;
        const meta = log[Symbol.for("splat")]?.[0] || log?.meta;
        return {
            timestamp,
            message,
            stack,
            meta,
            level: level || log_level_1.LogLevel.INFO,
            service: service || serviceName,
        };
    };
    return new winston_elasticsearch_1.ElasticsearchTransport({
        level: minLevel,
        clientOpts: { node: url },
        indexPrefix: `${serviceName}-logs`,
        transformer: esTransfer,
    });
};
exports.createElasticsearchTransport = createElasticsearchTransport;
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