Daniel Volz
51 lines
1.2 KiB
TypeScript
51 lines
1.2 KiB
TypeScript
/**
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* Simple startup logger that respects LOG_LEVEL environment variable.
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* Used for code that runs before Fastify is initialized (db/client.ts, migrations).
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* Once Fastify is running, use app.log instead.
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*/
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const LOG_LEVELS: Record<string, number> = {
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silent: 60,
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fatal: 60,
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error: 50,
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warn: 40,
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info: 30,
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debug: 20,
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trace: 10,
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};
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function getLevel(): number {
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const envLevel = (process.env.LOG_LEVEL || "info").toLowerCase();
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return LOG_LEVELS[envLevel] ?? LOG_LEVELS.info;
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}
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function shouldLog(level: string): boolean {
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return LOG_LEVELS[level] >= getLevel();
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}
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function ts(): string {
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return new Date().toISOString();
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}
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export const log = {
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debug(msg: string): void {
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if (shouldLog("debug")) console.log(`[${ts()}] [DEBUG] ${msg}`);
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},
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info(msg: string): void {
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if (shouldLog("info")) console.log(`[${ts()}] [INFO] ${msg}`);
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},
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warn(msg: string): void {
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if (shouldLog("warn")) console.warn(`[${ts()}] [WARN] ${msg}`);
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},
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error(msg: string): void {
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if (shouldLog("error")) console.error(`[${ts()}] [ERROR] ${msg}`);
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},
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};
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/** Logger interface for services that receive a logger from the caller */
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export type ServiceLogger = {
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info: (msg: string) => void;
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debug: (msg: string) => void;
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error: (msg: string) => void;
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};
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