Logging

Overview

The utils package provides logging utilities with environment awareness, automatically switching between development and production logging modes.

API Reference

IsDev() bool

Checks if the application is running in development environment (when env environment variable equals "dev").

if utils.IsDev() {
    fmt.Println("Running in development mode")
}

LogMessage(message string)

Logs a message. Uses fmt.Println in development mode and log.Println in production mode.

utils.LogMessage("Application started")

DevLogError(errMsg string)

Logs an error message in development mode with timestamp and red color.

utils.DevLogError("Failed to connect to database")
// Output: [Dev Logs] - 2024-01-01 12:00:00: Failed to connect to database

DevLogInfo(infoMsg string)

Logs an info message in development mode with timestamp and bright blue color.

utils.DevLogInfo("Processing request")

DevLogSuccess(successMsg string)

Logs a success message in development mode with timestamp and green color.

utils.DevLogSuccess("User logged in successfully")

Example

package main

import (
	"github.com/leoheung/go-patterns/utils"
)

func main() {
	// Check environment
	if utils.IsDev() {
		utils.LogMessage("Running in development mode")
	}

	// Log messages based on environment
	utils.LogMessage("Application started")

	// Development-only colored logs
	utils.DevLogError("This is an error")
	utils.DevLogInfo("This is info")
	utils.DevLogSuccess("This is success")
}

Notes

• Set env=dev environment variable to enable development mode
• Development logs are colored and include timestamps
• Production logs use standard library log package