handler.go

func EditProfileFn(c *gin.Context) {
	currentUser := models.User{}
	session := sessions.Default(c)
	u := session.Get("user")
	if u != nil {
		currentUser = u.(models.User)
	}
	dbc, exist := c.Get("db")
	if !exist {
		c.HTML(http.StatusOK, "index", gin.H{
			"title": "Hi! GoBlog.",
			"error": "We've got an internal error, please try later.",
		})
		return
	}
	if c.Request.Method == http.MethodGet { // Edit profile form
		c.HTML(http.StatusOK, "edit_profile", gin.H{
			"title": "Hi! GoBlog.",
			"user":  currentUser,
		})
	} else if c.Request.Method == http.MethodPost { // Process profile form
		var profileForm models.EditProfile
		if err := c.ShouldBind(&profileForm); err == nil {
			db := dbc.(*gorm.DB)
			var errors string
			var user models.User
			db.Where("username = ?", profileForm.Username).First(&user)
			if db.NewRecord(user) { // If true no user found
				currentUser.Username = profileForm.Username
				currentUser.AboutMe = profileForm.AboutMe
				db.Save(&currentUser)
				session.Set("user", currentUser)
				session.Save()
			} else {
				errors = "User name in use, plase choose another one."
			}
			posts := [...]struct {
				Author *models.User
				Body   string
			}{
				{&currentUser, "Test post #1"},
				{&currentUser, "Test post #2"},
			}
			c.HTML(http.StatusOK, "profile", gin.H{
				"title":        "Hi! GoBlog.",
				"user":         &currentUser,
				"current_user": &currentUser,
				"posts":        posts,
				"error":        errors,
			})
		} else {
			c.HTML(http.StatusOK, "edit_profile", gin.H{
				"title": "Hi! GoBlog.",
				"error": "Required fields are not provided correctly.",
			})
			return
		}
	}
}