wehub-resource-sync
53 lines
1.5 KiB
TypeScript
53 lines
1.5 KiB
TypeScript
const LOG_LEVELS = { debug: 0, info: 1, warn: 2, error: 3 } as const;
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type LogLevel = keyof typeof LOG_LEVELS;
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function getMinLevel(): LogLevel {
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const env = (process.env.LOG_LEVEL ?? 'info').toLowerCase();
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return env in LOG_LEVELS ? (env as LogLevel) : 'info';
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}
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function isJsonFormat(): boolean {
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return process.env.LOG_FORMAT === 'json';
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}
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function formatLine(level: LogLevel, tag: string, args: unknown[]): string {
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const timestamp = new Date().toISOString();
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const upperLevel = level.toUpperCase();
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const msg = args
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.map((a) =>
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a instanceof Error ? (a.stack ?? a.message) : typeof a === 'string' ? a : JSON.stringify(a),
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)
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.join(' ');
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if (isJsonFormat()) {
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return JSON.stringify({ timestamp, level: upperLevel, tag, message: msg });
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}
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return `[${timestamp}] [${upperLevel}] [${tag}] ${msg}`;
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}
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export function createLogger(tag: string) {
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const emit = (level: LogLevel, args: unknown[]) => {
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if (LOG_LEVELS[level] < LOG_LEVELS[getMinLevel()]) return;
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const line = formatLine(level, tag, args);
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// Console output
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const fn =
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level === 'debug'
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? console.debug
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: level === 'warn'
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? console.warn
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: level === 'error'
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? console.error
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: console.log;
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fn(line);
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};
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return {
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debug: (...args: unknown[]) => emit('debug', args),
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info: (...args: unknown[]) => emit('info', args),
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warn: (...args: unknown[]) => emit('warn', args),
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error: (...args: unknown[]) => emit('error', args),
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};
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}
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