Renamed controllers package to routes.

routes/login.go

@@ -0,0 +1,85 @@
+package routes
+
+import (
+	"fmt"
+
+	"goweb/auth"
+	"goweb/controller"
+	"goweb/ent"
+	"goweb/ent/user"
+	"goweb/msg"
+
+	"github.com/labstack/echo/v4"
+)
+
+type (
+	Login struct {
+		controller.Controller
+		form LoginForm
+	}
+
+	LoginForm struct {
+		Username string `form:"username" validate:"required"`
+		Password string `form:"password" validate:"required"`
+	}
+)
+
+func (l *Login) Get(c echo.Context) error {
+	p := controller.NewPage(c)
+	p.Layout = "auth"
+	p.Name = "login"
+	p.Title = "Log in"
+	p.Data = l.form
+	return l.RenderPage(c, p)
+}
+
+func (l *Login) Post(c echo.Context) error {
+	fail := func(message string, err error) error {
+		c.Logger().Errorf("%s: %v", message, err)
+		msg.Danger(c, "An error occurred. Please try again.")
+		return l.Get(c)
+	}
+
+	// Parse the form values
+	if err := c.Bind(&l.form); err != nil {
+		return fail("unable to parse login form", err)
+	}
+
+	// Validate the form
+	if err := c.Validate(l.form); err != nil {
+		msg.Danger(c, "All fields are required.")
+		return l.Get(c)
+	}
+
+	// Attempt to load the user
+	u, err := l.Container.ORM.User.
+		Query().
+		Where(user.Username(l.form.Username)).
+		First(c.Request().Context())
+
+	if err != nil {
+		switch err.(type) {
+		case *ent.NotFoundError:
+			msg.Danger(c, "Invalid credentials. Please try again.")
+			return l.Get(c)
+		default:
+			return fail("error querying user during login", err)
+		}
+	}
+
+	// Check if the password is correct
+	err = auth.CheckPassword(l.form.Password, u.Password)
+	if err != nil {
+		msg.Danger(c, "Invalid credentials. Please try again.")
+		return l.Get(c)
+	}
+
+	// Log the user in
+	err = auth.Login(c, u.ID)
+	if err != nil {
+		return fail("unable to log in user", err)
+	}
+
+	msg.Success(c, fmt.Sprintf("Welcome back, %s. You are now logged in.", u.Username))
+	return l.Redirect(c, "home")
+}