migrate from github

internal/repository/user_repo/mget_by_id.go

@@ -0,0 +1,51 @@
+package user_repo
+
+import (
+	"github.com/XingfenD/yoresee_doc/internal/model"
+	"gorm.io/gorm"
+)
+
+type MGetUserByIDOperation struct {
+	repo    *UserRepository
+	userIDs []int64
+	tx      *gorm.DB
+}
+
+func (r *UserRepository) MGetUserByID(userIDs []int64) *MGetUserByIDOperation {
+	return &MGetUserByIDOperation{
+		repo:    r,
+		userIDs: userIDs,
+	}
+}
+
+func (op *MGetUserByIDOperation) WithTx(tx *gorm.DB) *MGetUserByIDOperation {
+	op.tx = tx
+	return op
+}
+
+func (op *MGetUserByIDOperation) Exec() (map[int64]*model.User, error) {
+	if op.tx == nil {
+		op.tx = op.repo.db
+	}
+	result := make(map[int64]*model.User)
+
+	if len(op.userIDs) == 0 {
+		return result, nil
+	}
+
+	var users []model.User
+	var err error
+
+	err = op.tx.Where("id IN ?", op.userIDs).Find(&users).Error
+
+	if err != nil {
+		return nil, err
+	}
+
+	for _, user := range users {
+		userCopy := user
+		result[user.ID] = &userCopy
+	}
+
+	return result, nil
+}