Moved the code from src to the root.

setting/entity.go

@@ -0,0 +1,7 @@
+package setting
+
+type Setting struct {
+	ID    uint   `gorm:"primary_key"`
+	Code  string `gorm:"type:varchar(100);uniqueIndex;not null"`
+	Value string `gorm:"type:text"`
+}

setting/repository.go

@@ -0,0 +1,55 @@
+package setting
+
+import (
+	"errors"
+	"gorm.io/gorm"
+)
+
+type RepositoryContract interface {
+	Create(setting Setting) (Setting, error)
+	CreateOrUpdate(code string, value string) (Setting, error)
+	GetValue(code string) (value string, err error)
+}
+
+type Repository struct {
+	db *gorm.DB
+}
+
+func NewRepository(db *gorm.DB) *Repository {
+	return &Repository{db}
+}
+
+func (r Repository) GetValue(code string) (value string, err error) {
+	var setting Setting
+	err = r.db.Where("code = ?", code).First(&setting).Error
+	if err != nil {
+		return "", err
+	}
+	return setting.Value, err
+}
+
+func (r Repository) Create(setting Setting) (Setting, error) {
+	err := r.db.Create(&setting).Error
+	if err != nil {
+		return setting, err
+	}
+	return setting, err
+}
+
+func (r Repository) CreateOrUpdate(code string, value string) (Setting, error) {
+	var setting Setting
+	err := r.db.Where("code = ?", code).First(&setting).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) == true {
+			setting = Setting{Code: code, Value: value}
+			return r.Create(setting)
+		} else {
+			return setting, err
+		}
+	}
+	err = r.db.Model(&setting).UpdateColumn("value", value).Error
+	if err != nil {
+		return setting, err
+	}
+	return setting, err
+}