feat: able to display quota in dollar

controller/billing.go

@@ -2,6 +2,7 @@ package controller
 
 import (
 	"github.com/gin-gonic/gin"
+	"one-api/common"
 	"one-api/model"
 )
 
@@ -18,23 +19,38 @@ func GetSubscription(c *gin.Context) {
 		})
 		return
 	}
+	amount := float64(quota)
+	if common.DisplayInCurrencyEnabled {
+		amount /= common.QuotaPerUnit
+	}
 	subscription := OpenAISubscriptionResponse{
 		Object:             "billing_subscription",
 		HasPaymentMethod:   true,
-		SoftLimitUSD:       float64(quota),
-		HardLimitUSD:       float64(quota),
-		SystemHardLimitUSD: float64(quota),
+		SoftLimitUSD:       amount,
+		HardLimitUSD:       amount,
+		SystemHardLimitUSD: amount,
 	}
 	c.JSON(200, subscription)
 	return
 }
 
 func GetUsage(c *gin.Context) {
-	//userId := c.GetInt("id")
-	// TODO: get usage from database
+	userId := c.GetInt("id")
+	quota, err := model.GetUserUsedQuota(userId)
+	if err != nil {
+		openAIError := OpenAIError{
+			Message: err.Error(),
+			Type:    "one_api_error",
+		}
+		c.JSON(200, gin.H{
+			"error": openAIError,
+		})
+		return
+	}
+	amount := float64(quota)
 	usage := OpenAIUsageResponse{
 		Object:     "list",
-		TotalUsage: 0,
+		TotalUsage: amount,
 	}
 	c.JSON(200, usage)
 	return