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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | 2x 2x 2x 2x 24x 24x 24x 22x 15x 15x 15x 15x 15x 6x 24x 19x 5x 5x 1x 4x 6x 1x 5x 5x | /* eslint-disable no-console */
/*
* console.js: Transport for outputting to the console.
*
* (C) 2010 Charlie Robbins
* MIT LICENCE
*/
'use strict';
const os = require('os');
const { LEVEL, MESSAGE } = require('triple-beam');
const TransportStream = require('winston-transport');
/**
* Transport for outputting to the console.
* @type {Console}
* @extends {TransportStream}
*/
module.exports = class Console extends TransportStream {
/**
* Constructor function for the Console transport object responsible for
* persisting log messages and metadata to a terminal or TTY.
* @param {!Object} [options={}] - Options for this instance.
*/
constructor(options = {}) {
super(options);
// Expose the name of this Transport on the prototype
this.name = 'console';
this.stderrLevels = this._stringArrayToSet(options.stderrLevels);
this.eol = options.eol || os.EOL;
}
/**
* Core logging method exposed to Winston.
* @param {Object} info - TODO: add param description.
* @param {Function} callback - TODO: add param description.
* @returns {undefined}
*/
log(info, callback) {
setImmediate(() => this.emit('logged', info));
// Remark: what if there is no raw...?
Iif (this.stderrLevels[info[LEVEL]]) {
if (console._stderr) {
// Node.js maps `process.stderr` to `console._stderr`.
console._stderr.write(`${info[MESSAGE]}${this.eol}`);
} else {
// console.error adds a newline
console.error(info[MESSAGE]);
}
if (callback) {
callback(); // eslint-disable-line callback-return
}
return;
}
Eif (console._stdout) {
// Node.js maps `process.stdout` to `console._stdout`.
console._stdout.write(`${info[MESSAGE]}${this.eol}`);
} else {
// console.log adds a newline.
console.log(info[MESSAGE]);
}
if (callback) {
callback(); // eslint-disable-line callback-return
}
}
/**
* Returns a Set-like object with strArray's elements as keys (each with the
* value true).
* @param {Array} strArray - Array of Set-elements as strings.
* @param {?string} [errMsg] - Custom error message thrown on invalid input.
* @returns {Object} - TODO: add return description.
* @private
*/
_stringArrayToSet(strArray, errMsg) {
if (!strArray)
return {};
errMsg = errMsg || 'Cannot make set from type other than Array of string elements';
if (!Array.isArray(strArray)) {
throw new Error(errMsg);
}
return strArray.reduce((set, el) => {
if (typeof el !== 'string') {
throw new Error(errMsg);
}
set[el] = true;
return set;
}, {});
}
};
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