const HexUtil = require('./HexUtil'); class Logger { constructor() { this.debugEnabled = false; } debug(...args) { if (!this.debugEnabled) return; this._print(...args); } _print(...args) { try { const strings = this._convertArgsToStrings(...args); if (strings.length) { console.log(...strings); } } catch(e) { console.log("Error while logging: " + e); } } _convertArgsToStrings(...args) { const out = []; for (const arg of args) { if (arg instanceof Error) { out.push(arg.stack); } else if (arg instanceof Buffer) { out.push(HexUtil.debugDump(arg)); } else if (typeof arg == 'function') { const result = arg.call(undefined, (...args) => this._print(...args)); if (result !== undefined) out.push(...this._convertArgsToStrings(result)); } else { out.push(arg); } } return out; } } module.exports = Logger;