构建自定义记录器:所有类型的自定义Swift字符串插值

import Foundation

enum LogLevel: String {
    case debug = "DEBUG"
    case info = "INFO"
    case warning = "WARNING"
    case error = "ERROR"
}

struct Logger {
    static var logLevel: LogLevel = .debug
    
    static func log(_ level: LogLevel, _ message: String) {
        if level.rawValue >= logLevel.rawValue {
            let timestamp = DateFormatter.localizedString(from: Date(), dateStyle: .short, timeStyle: .medium)
            let logMessage = "[\(timestamp)] [\(level.rawValue)]: \(message)"
            print(logMessage)
        }
    }
}

extension Logger {
    static func debug(_ message: String) {
        log(.debug, message)
    }
    
    static func info(_ message: String) {
        log(.info, message)
    }
    
    static func warning(_ message: String) {
        log(.warning, message)
    }
    
    static func error(_ message: String) {
        log(.error, message)
    }
}

Logger.logLevel = .debug

Logger.debug("This is a debug message.")
Logger.info("This is an info message.")
Logger.warning("This is a warning message.")
Logger.error("This is an error message.")