2a09d1a4
 liuqimichale
添加宜春 天水 宣化
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const LEVELS = [
'debug',
'info',
'warn',
'error',
'silent'
];
const LEVEL_TO_CONSOLE_METHOD = new Map([
['debug', 'log'],
['info', 'log'],
['warn', 'log']
]);
class Logger {
static levels = LEVELS;
static defaultLevel = 'info';
constructor(level = Logger.defaultLevel) {
this.activeLevels = new Set();
this.setLogLevel(level);
}
setLogLevel(level) {
const levelIndex = LEVELS.indexOf(level);
if (levelIndex === -1) throw new Error(`Invalid log level "${level}". Use one of these: ${LEVELS.join(', ')}`);
this.activeLevels.clear();
for (const [i, level] of LEVELS.entries()) {
if (i >= levelIndex) this.activeLevels.add(level);
}
}
_log(level, ...args) {
console[LEVEL_TO_CONSOLE_METHOD.get(level) || level](...args);
}
};
LEVELS.forEach(level => {
if (level === 'silent') return;
Logger.prototype[level] = function (...args) {
if (this.activeLevels.has(level)) this._log(level, ...args);
};
});
module.exports = Logger;
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