feat: backend i18n

common/gin.go

@@ -218,6 +218,39 @@ func ApiSuccess(c *gin.Context, data any) {
 	})
 }
 
+// ApiErrorI18n returns a translated error message based on the user's language preference
+// key is the i18n message key, args is optional template data
+func ApiErrorI18n(c *gin.Context, key string, args ...map[string]any) {
+	msg := TranslateMessage(c, key, args...)
+	c.JSON(http.StatusOK, gin.H{
+		"success": false,
+		"message": msg,
+	})
+}
+
+// ApiSuccessI18n returns a translated success message based on the user's language preference
+func ApiSuccessI18n(c *gin.Context, key string, data any, args ...map[string]any) {
+	msg := TranslateMessage(c, key, args...)
+	c.JSON(http.StatusOK, gin.H{
+		"success": true,
+		"message": msg,
+		"data":    data,
+	})
+}
+
+// TranslateMessage is a helper function that calls i18n.T
+// This function is defined here to avoid circular imports
+// The actual implementation will be set during init
+var TranslateMessage func(c *gin.Context, key string, args ...map[string]any) string
+
+func init() {
+	// Default implementation that returns the key as-is
+	// This will be replaced by i18n.T during i18n initialization
+	TranslateMessage = func(c *gin.Context, key string, args ...map[string]any) string {
+		return key
+	}
+}
+
 func ParseMultipartFormReusable(c *gin.Context) (*multipart.Form, error) {
 	requestBody, err := GetRequestBody(c)
 	if err != nil {

constant/context_key.go

@@ -62,4 +62,7 @@ const (
 	// ContextKeyAdminRejectReason stores an admin-only reject/block reason extracted from upstream responses.
 	// It is not returned to end users, but can be persisted into consume/error logs for debugging.
 	ContextKeyAdminRejectReason ContextKey = "admin_reject_reason"
+
+	// ContextKeyLanguage stores the user's language preference for i18n
+	ContextKeyLanguage ContextKey = "language"
 )

controller/redemption.go

@@ -1,12 +1,12 @@
 package controller
 
 import (
-	"errors"
 	"net/http"
 	"strconv"
 	"unicode/utf8"
 
 	"github.com/QuantumNous/new-api/common"
+	"github.com/QuantumNous/new-api/i18n"
 	"github.com/QuantumNous/new-api/model"
 
 	"github.com/gin-gonic/gin"
@@ -66,28 +66,19 @@ func AddRedemption(c *gin.Context) {
 		return
 	}
 	if utf8.RuneCountInString(redemption.Name) == 0 || utf8.RuneCountInString(redemption.Name) > 20 {
-		c.JSON(http.StatusOK, gin.H{
-			"success": false,
-			"message": "兑换码名称长度必须在1-20之间",
-		})
+		common.ApiErrorI18n(c, i18n.MsgRedemptionNameLength)
 		return
 	}
 	if redemption.Count <= 0 {
-		c.JSON(http.StatusOK, gin.H{
-			"success": false,
-			"message": "兑换码个数必须大于0",
-		})
+		common.ApiErrorI18n(c, i18n.MsgRedemptionCountPositive)
 		return
 	}
 	if redemption.Count > 100 {
-		c.JSON(http.StatusOK, gin.H{
-			"success": false,
-			"message": "一次兑换码批量生成的个数不能大于 100",
-		})
+		common.ApiErrorI18n(c, i18n.MsgRedemptionCountMax)
 		return
 	}
-	if err := validateExpiredTime(redemption.ExpiredTime); err != nil {
-		c.JSON(http.StatusOK, gin.H{"success": false, "message": err.Error()})
+	if valid, msg := validateExpiredTime(c, redemption.ExpiredTime); !valid {
+		c.JSON(http.StatusOK, gin.H{"success": false, "message": msg})
 		return
 	}
 	var keys []string
@@ -106,7 +97,7 @@ func AddRedemption(c *gin.Context) {
 			common.SysError("failed to insert redemption: " + err.Error())
 			c.JSON(http.StatusOK, gin.H{
 				"success": false,
-				"message": "创建兑换码失败，请稍后重试",
+				"message": i18n.T(c, i18n.MsgRedemptionCreateFailed),
 				"data":    keys,
 			})
 			return
@@ -149,8 +140,8 @@ func UpdateRedemption(c *gin.Context) {
 		return
 	}
 	if statusOnly == "" {
-		if err := validateExpiredTime(redemption.ExpiredTime); err != nil {
-			c.JSON(http.StatusOK, gin.H{"success": false, "message": err.Error()})
+		if valid, msg := validateExpiredTime(c, redemption.ExpiredTime); !valid {
+			c.JSON(http.StatusOK, gin.H{"success": false, "message": msg})
 			return
 		}
 		// If you add more fields, please also update redemption.Update()
@@ -188,9 +179,9 @@ func DeleteInvalidRedemption(c *gin.Context) {
 	return
 }
 
-func validateExpiredTime(expired int64) error {
+func validateExpiredTime(c *gin.Context, expired int64) (bool, string) {
 	if expired != 0 && expired < common.GetTimestamp() {
-		return errors.New("过期时间不能早于当前时间")
+		return false, i18n.T(c, i18n.MsgRedemptionExpireTimeInvalid)
 	}
-	return nil
+	return true, ""
 }

controller/token.go

@@ -1,12 +1,12 @@
 package controller
 
 import (
-	"fmt"
 	"net/http"
 	"strconv"
 	"strings"
 
 	"github.com/QuantumNous/new-api/common"
+	"github.com/QuantumNous/new-api/i18n"
 	"github.com/QuantumNous/new-api/model"
 
 	"github.com/gin-gonic/gin"
@@ -108,10 +108,7 @@ func GetTokenUsage(c *gin.Context) {
 	token, err := model.GetTokenByKey(strings.TrimPrefix(tokenKey, "sk-"), false)
 	if err != nil {
 		common.SysError("failed to get token by key: " + err.Error())
-		c.JSON(http.StatusOK, gin.H{
-			"success": false,
-			"message": "获取令牌信息失败，请稍后重试",
-		})
+		common.ApiErrorI18n(c, i18n.MsgTokenGetInfoFailed)
 		return
 	}
 
@@ -145,36 +142,24 @@ func AddToken(c *gin.Context) {
 		return
 	}
 	if len(token.Name) > 50 {
-		c.JSON(http.StatusOK, gin.H{
-			"success": false,
-			"message": "令牌名称过长",
-		})
+		common.ApiErrorI18n(c, i18n.MsgTokenNameTooLong)
 		return
 	}
 	// 非无限额度时，检查额度值是否超出有效范围
 	if !token.UnlimitedQuota {
 		if token.RemainQuota < 0 {
-			c.JSON(http.StatusOK, gin.H{
-				"success": false,
-				"message": "额度值不能为负数",
-			})
+			common.ApiErrorI18n(c, i18n.MsgTokenQuotaNegative)
 			return
 		}
 		maxQuotaValue := int((1000000000 * common.QuotaPerUnit))
 		if token.RemainQuota > maxQuotaValue {
-			c.JSON(http.StatusOK, gin.H{
-				"success": false,
-				"message": fmt.Sprintf("额度值超出有效范围，最大值为 %d", maxQuotaValue),
-			})
+			common.ApiErrorI18n(c, i18n.MsgTokenQuotaExceedMax, map[string]any{"Max": maxQuotaValue})
 			return
 		}
 	}
 	key, err := common.GenerateKey()
 	if err != nil {
-		c.JSON(http.StatusOK, gin.H{
-			"success": false,
-			"message": "生成令牌失败",
-		})
+		common.ApiErrorI18n(c, i18n.MsgTokenGenerateFailed)
 		common.SysLog("failed to generate token key: " + err.Error())
 		return
 	}
@@ -230,26 +215,17 @@ func UpdateToken(c *gin.Context) {
 		return
 	}
 	if len(token.Name) > 50 {
-		c.JSON(http.StatusOK, gin.H{
-			"success": false,
-			"message": "令牌名称过长",
-		})
+		common.ApiErrorI18n(c, i18n.MsgTokenNameTooLong)
 		return
 	}
 	if !token.UnlimitedQuota {
 		if token.RemainQuota < 0 {
-			c.JSON(http.StatusOK, gin.H{
-				"success": false,
-				"message": "额度值不能为负数",
-			})
+			common.ApiErrorI18n(c, i18n.MsgTokenQuotaNegative)
 			return
 		}
 		maxQuotaValue := int((1000000000 * common.QuotaPerUnit))
 		if token.RemainQuota > maxQuotaValue {
-			c.JSON(http.StatusOK, gin.H{
-				"success": false,
-				"message": fmt.Sprintf("额度值超出有效范围，最大值为 %d", maxQuotaValue),
-			})
+			common.ApiErrorI18n(c, i18n.MsgTokenQuotaExceedMax, map[string]any{"Max": maxQuotaValue})
 			return
 		}
 	}
@@ -260,17 +236,11 @@ func UpdateToken(c *gin.Context) {
 	}
 	if token.Status == common.TokenStatusEnabled {
 		if cleanToken.Status == common.TokenStatusExpired && cleanToken.ExpiredTime <= common.GetTimestamp() && cleanToken.ExpiredTime != -1 {
-			c.JSON(http.StatusOK, gin.H{
-				"success": false,
-				"message": "令牌已过期，无法启用，请先修改令牌过期时间，或者设置为永不过期",
-			})
+			common.ApiErrorI18n(c, i18n.MsgTokenExpiredCannotEnable)
 			return
 		}
 		if cleanToken.Status == common.TokenStatusExhausted && cleanToken.RemainQuota <= 0 && !cleanToken.UnlimitedQuota {
-			c.JSON(http.StatusOK, gin.H{
-				"success": false,
-				"message": "令牌可用额度已用尽，无法启用，请先修改令牌剩余额度，或者设置为无限额度",
-			})
+			common.ApiErrorI18n(c, i18n.MsgTokenExhaustedCannotEable)
 			return
 		}
 	}
@@ -307,10 +277,7 @@ type TokenBatch struct {
 func DeleteTokenBatch(c *gin.Context) {
 	tokenBatch := TokenBatch{}
 	if err := c.ShouldBindJSON(&tokenBatch); err != nil || len(tokenBatch.Ids) == 0 {
-		c.JSON(http.StatusOK, gin.H{
-			"success": false,
-			"message": "参数错误",
-		})
+		common.ApiErrorI18n(c, i18n.MsgInvalidParams)
 		return
 	}
 	userId := c.GetInt("id")