knex/lib/logger.js

/* eslint no-console:0 */

const color = require('colorette');
const { isFunction, isNil } = require('lodash');

function log(message, userFn, colorFn) {
  if (!isNil(userFn) && !isFunction(userFn)) {
    throw new TypeError('Extensions to knex logger must be functions!');
  }

  if (isFunction(userFn)) {
    userFn(message);
    return;
  }

  console.log(colorFn ? colorFn(message) : message);
}

class Logger {
  constructor(config) {
    const { log: { debug, warn, error, deprecate } = {} } = config;

    this._debug = debug;
    this._warn = warn;
    this._error = error;
    this._deprecate = deprecate;
  }

  debug(message) {
    log(message, this._debug);
  }

  warn(message) {
    log(message, this._warn, color.yellow);
  }

  error(message) {
    log(message, this._error, color.red);
  }

  deprecate(method, alternative) {
    const message = `${method} is deprecated, please use ${alternative}`;

    log(message, this._deprecate, color.yellow);
  }
}

module.exports = Logger;