import { appendFileSync, writeFileSync } from 'fs';
import { format } from 'util';
import { EOL } from 'os';
export interface Logger {
log(message: string, ...args: any[]): void;
}
export class ConsoleLogger implements Logger {
log(message: string, ...args: any[]): void {
console.log('**', message, ...args);
}
}
export class FileLogger implements Logger {
constructor(private path: string) {
writeFileSync(path, '');
}
log(message: string, ...args: any[]): void {
const date = new Date().toISOString();
appendFileSync(this.path, `[${date}] ${format(message, ...args)}${EOL}`);
}
}
export class MultiLogger implements Logger {
constructor(private loggers: Logger[]) { }
log(message: string, ...args: any[]): void {
for (const logger of this.loggers) {
logger.log(message, ...args);
}
}
}
export async function measureAndLog<T>(promiseFactory: () => Promise<T>, name: string, logger: Logger): Promise<T> {
const now = Date.now();
logger.log(`Starting operation '${name}'...`);
let res: T | undefined = undefined;
let e: unknown;
try {
res = await promiseFactory();
} catch (error) {
e = error;
}
if (e) {
logger.log(`Finished operation '${name}' with error ${e} after ${Date.now() - now}ms`);
throw e;
}
logger.log(`Finished operation '${name}' successfully after ${Date.now() - now}ms`);
return res as unknown as T;
}
