migrate from github

internal/repository/user_repo/get_by_email.go

@@ -0,0 +1,37 @@
+package user_repo
+
+import (
+	"github.com/XingfenD/yoresee_doc/internal/model"
+	"gorm.io/gorm"
+)
+
+type UserGetByEmailOperation struct {
+	repo  *UserRepository
+	email string
+	tx    *gorm.DB
+}
+
+func (r *UserRepository) GetByEmail(email string) *UserGetByEmailOperation {
+	return &UserGetByEmailOperation{
+		repo:  r,
+		email: email,
+	}
+}
+
+func (op *UserGetByEmailOperation) WithTx(tx *gorm.DB) *UserGetByEmailOperation {
+	op.tx = tx
+	return op
+}
+
+func (op *UserGetByEmailOperation) Exec() (*model.User, error) {
+	var user model.User
+	var err error
+
+	if op.tx != nil {
+		err = op.tx.Where("email = ?", op.email).First(&user).Error
+	} else {
+		err = op.repo.db.Where("email = ?", op.email).First(&user).Error
+	}
+
+	return &user, err
+}