refactor: migrate group ratio and user usable groups logic to new setting package

- Replaced references to common.GroupRatio and common.UserUsableGroups with corresponding functions from the new setting package across multiple controllers and services.
- Introduced new setting functions for managing group ratios and user usable groups, enhancing code organization and maintainability.
- Updated related functions to ensure consistent behavior with the new setting package integration.

setting/group_ratio.go

@@ -0,0 +1,62 @@
+package setting
+
+import (
+	"encoding/json"
+	"errors"
+	"one-api/common"
+)
+
+var groupRatio = map[string]float64{
+	"default": 1,
+	"vip":     1,
+	"svip":    1,
+}
+
+func GetGroupRatioCopy() map[string]float64 {
+	groupRatioCopy := make(map[string]float64)
+	for k, v := range groupRatio {
+		groupRatioCopy[k] = v
+	}
+	return groupRatioCopy
+}
+
+func ContainsGroupRatio(name string) bool {
+	_, ok := groupRatio[name]
+	return ok
+}
+
+func GroupRatio2JSONString() string {
+	jsonBytes, err := json.Marshal(groupRatio)
+	if err != nil {
+		common.SysError("error marshalling model ratio: " + err.Error())
+	}
+	return string(jsonBytes)
+}
+
+func UpdateGroupRatioByJSONString(jsonStr string) error {
+	groupRatio = make(map[string]float64)
+	return json.Unmarshal([]byte(jsonStr), &groupRatio)
+}
+
+func GetGroupRatio(name string) float64 {
+	ratio, ok := groupRatio[name]
+	if !ok {
+		common.SysError("group ratio not found: " + name)
+		return 1
+	}
+	return ratio
+}
+
+func CheckGroupRatio(jsonStr string) error {
+	checkGroupRatio := make(map[string]float64)
+	err := json.Unmarshal([]byte(jsonStr), &checkGroupRatio)
+	if err != nil {
+		return err
+	}
+	for name, ratio := range checkGroupRatio {
+		if ratio < 0 {
+			return errors.New("group ratio must be not less than 0: " + name)
+		}
+	}
+	return nil
+}

setting/user_usable_group.go

@@ -0,0 +1,47 @@
+package setting
+
+import (
+	"encoding/json"
+	"one-api/common"
+)
+
+var UserUsableGroups = map[string]string{
+	"default": "默认分组",
+	"vip":     "vip分组",
+}
+
+func UserUsableGroups2JSONString() string {
+	jsonBytes, err := json.Marshal(UserUsableGroups)
+	if err != nil {
+		common.SysError("error marshalling user groups: " + err.Error())
+	}
+	return string(jsonBytes)
+}
+
+func UpdateUserUsableGroupsByJSONString(jsonStr string) error {
+	UserUsableGroups = make(map[string]string)
+	return json.Unmarshal([]byte(jsonStr), &UserUsableGroups)
+}
+
+func GetUserUsableGroups(userGroup string) map[string]string {
+	if userGroup == "" {
+		// 如果userGroup为空，返回UserUsableGroups
+		return UserUsableGroups
+	}
+	// 如果userGroup不在UserUsableGroups中，返回UserUsableGroups + userGroup
+	if _, ok := UserUsableGroups[userGroup]; !ok {
+		appendUserUsableGroups := make(map[string]string)
+		for k, v := range UserUsableGroups {
+			appendUserUsableGroups[k] = v
+		}
+		appendUserUsableGroups[userGroup] = "用户分组"
+		return appendUserUsableGroups
+	}
+	// 如果userGroup在UserUsableGroups中，返回UserUsableGroups
+	return UserUsableGroups
+}
+
+func GroupInUserUsableGroups(groupName string) bool {
+	_, ok := UserUsableGroups[groupName]
+	return ok
+}