104 lines
2.5 KiB
JavaScript
104 lines
2.5 KiB
JavaScript
|
const conversion = require("./conversion");
|
||
|
|
|
||
|
|
class Logger {
|
||
|
|
/** Logger
|
||
|
|
*
|
||
|
|
* @param {{
|
||
|
|
* output: NodeJS.WritableStream,
|
||
|
|
* template: string,
|
||
|
|
* argsPlaceholder: string,
|
||
|
|
* historySize: number,
|
||
|
|
* defaultLevel: string
|
||
|
|
* }} options
|
||
|
|
*/
|
||
|
|
constructor(options = {})
|
||
|
|
{
|
||
|
|
this.output = options.output || process.stdout;
|
||
|
|
this.template = options.template || "[{level} {timestamp}] {message}";
|
||
|
|
this.levelsColors = { // no same colors
|
||
|
|
debug: "\x1b[32m",
|
||
|
|
info: "\x1b[36m",
|
||
|
|
warn: "\x1b[33m",
|
||
|
|
error: "\x1b[31m",
|
||
|
|
fatal: "\x1b[35m"
|
||
|
|
};
|
||
|
|
this.dict = options.dict || null;
|
||
|
|
this.argsPlaceholder = options.argsPlaceholder || "{}";
|
||
|
|
this.defaultLevel = options.defaultLevel || "info";
|
||
|
|
this.history = [];
|
||
|
|
this.historySize = options.historySize || 100;
|
||
|
|
this.onHistoryFull = options.onHistoryFull || function() {
|
||
|
|
// TODO: implement
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/** log
|
||
|
|
*
|
||
|
|
* @param {string} message
|
||
|
|
* @param {any} ...args
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
log (message, ...args)
|
||
|
|
{
|
||
|
|
this.alog(this.defaultLevel, message, ...args);
|
||
|
|
}
|
||
|
|
|
||
|
|
/** alog
|
||
|
|
*
|
||
|
|
* @param {string} level
|
||
|
|
* @param {string} message
|
||
|
|
* @param {any} ...args
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
alog(level, message, ...args)
|
||
|
|
{
|
||
|
|
//replace placeholders with args
|
||
|
|
let msg = this.template;
|
||
|
|
|
||
|
|
msg = msg.replace(/\{timestamp\}/g, new Date().toISOString());
|
||
|
|
msg = msg.replace(/\{level\}/g, level.charAt(0).toUpperCase());
|
||
|
|
msg = msg.replace(/\{message\}/g, message);
|
||
|
|
|
||
|
|
//replace placeholders with args
|
||
|
|
let argPlaceholder = this.argsPlaceholder;
|
||
|
|
let regex = new RegExp(argPlaceholder, "g");
|
||
|
|
let stringArgCount = (regex.exec(msg) || []).length;
|
||
|
|
args.forEach((v, i, a) => {
|
||
|
|
if (Buffer.isBuffer(v))
|
||
|
|
{
|
||
|
|
v = conversion.properHex(v).str;
|
||
|
|
}
|
||
|
|
if (typeof v === 'object')
|
||
|
|
{
|
||
|
|
v = JSON.stringify(v);
|
||
|
|
}
|
||
|
|
|
||
|
|
msg = msg.replace(argPlaceholder, v);
|
||
|
|
});
|
||
|
|
if (stringArgCount < args.length)
|
||
|
|
msg += ` (${args.length - stringArgCount} args overflow.)`;
|
||
|
|
else if (stringArgCount > args.length)
|
||
|
|
msg += ` (${stringArgCount - args.length} args missing.)`;
|
||
|
|
|
||
|
|
//replace dictionary keys
|
||
|
|
if (this.dict)
|
||
|
|
msg = dictionaryConversion(msg, this.dict);
|
||
|
|
|
||
|
|
// add color
|
||
|
|
msg = this.levelsColors[level] + msg + "\x1b[0m";
|
||
|
|
|
||
|
|
//log
|
||
|
|
this.output.write(msg + "\n");
|
||
|
|
|
||
|
|
//save to history
|
||
|
|
this.history.push({
|
||
|
|
level: level,
|
||
|
|
message: message,
|
||
|
|
args: args
|
||
|
|
});
|
||
|
|
if (this.history.length >= this.historySize)
|
||
|
|
this.onHistoryFull();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = Logger;
|