Support for password resets

users/handler/login.go

@@ -0,0 +1,54 @@
+package handler
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+	"github.com/micro/micro/v3/service/errors"
+	"github.com/micro/micro/v3/service/logger"
+	pb "github.com/micro/services/users/proto"
+	"gorm.io/gorm"
+)
+
+// Login using email and password returns the users profile and a token
+func (u *Users) Login(ctx context.Context, req *pb.LoginRequest, rsp *pb.LoginResponse) error {
+	// validate the request
+	if len(req.Email) == 0 {
+		return ErrMissingEmail
+	}
+	if len(req.Password) == 0 {
+		return ErrInvalidPassword
+	}
+
+	return u.DB.Transaction(func(tx *gorm.DB) error {
+		// lookup the user
+		var user User
+		if err := tx.Where(&User{Email: req.Email}).First(&user).Error; err == gorm.ErrRecordNotFound {
+			return ErrNotFound
+		} else if err != nil {
+			logger.Errorf("Error reading from the database: %v", err)
+			return errors.InternalServerError("DATABASE_ERROR", "Error connecting to the database")
+		}
+
+		// compare the passwords
+		if !passwordsMatch(user.Password, req.Password) {
+			return ErrIncorrectPassword
+		}
+
+		// generate a token for the user
+		token := Token{
+			UserID:    user.ID,
+			Key:       uuid.New().String(),
+			ExpiresAt: u.Time().Add(tokenTTL),
+		}
+		if err := tx.Create(&token).Error; err != nil {
+			logger.Errorf("Error writing to the database: %v", err)
+			return errors.InternalServerError("DATABASE_ERROR", "Error connecting to the database")
+		}
+
+		// serialize the response
+		rsp.Token = token.Key
+		rsp.User = user.Serialize()
+		return nil
+	})
+}