feat: init project

api/user_setting.go

@@ -0,0 +1,70 @@
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type UserSettingKey string
+
+const (
+	// UserSettingLocaleKey is the key type for user locale.
+	UserSettingLocaleKey UserSettingKey = "locale"
+)
+
+// String returns the string format of UserSettingKey type.
+func (key UserSettingKey) String() string {
+	switch key {
+	case UserSettingLocaleKey:
+		return "locale"
+	}
+	return ""
+}
+
+var (
+	UserSettingLocaleValue = []string{"en", "zh"}
+)
+
+type UserSetting struct {
+	UserID int
+	Key    UserSettingKey `json:"key"`
+	// Value is a JSON string with basic value
+	Value string `json:"value"`
+}
+
+type UserSettingUpsert struct {
+	UserID int
+	Key    UserSettingKey `json:"key"`
+	Value  string         `json:"value"`
+}
+
+func (upsert UserSettingUpsert) Validate() error {
+	if upsert.Key == UserSettingLocaleKey {
+		localeValue := "en"
+		err := json.Unmarshal([]byte(upsert.Value), &localeValue)
+		if err != nil {
+			return fmt.Errorf("failed to unmarshal user setting locale value")
+		}
+
+		invalid := true
+		for _, value := range UserSettingLocaleValue {
+			if localeValue == value {
+				invalid = false
+				break
+			}
+		}
+		if invalid {
+			return fmt.Errorf("invalid user setting locale value")
+		}
+	} else {
+		return fmt.Errorf("invalid user setting key")
+	}
+
+	return nil
+}
+
+type UserSettingFind struct {
+	UserID int
+
+	Key *UserSettingKey `json:"key"`
+}