Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/internal/service/antigravity_subscription_service.go

@@ -0,0 +1,42 @@
+package service
+
+import (
+	"strings"
+
+	"github.com/Wei-Shaw/sub2api/internal/pkg/antigravity"
+)
+
+const antigravitySubscriptionAbnormal = "abnormal"
+
+// AntigravitySubscriptionResult 表示订阅检测后的规范化结果。
+type AntigravitySubscriptionResult struct {
+	PlanType           string
+	SubscriptionStatus string
+	SubscriptionError  string
+}
+
+// NormalizeAntigravitySubscription 从 LoadCodeAssistResponse 提取 plan_type + 异常状态。
+// 使用 GetTier()（返回 tier ID）+ TierIDToPlanType 映射。
+func NormalizeAntigravitySubscription(resp *antigravity.LoadCodeAssistResponse) AntigravitySubscriptionResult {
+	if resp == nil {
+		return AntigravitySubscriptionResult{PlanType: "Free"}
+	}
+	tierID := resp.GetTier()
+	planType := antigravity.TierIDToPlanType(tierID)
+	if len(resp.IneligibleTiers) > 0 {
+		if planType == "" || planType == "Free" {
+			planType = "Abnormal"
+		}
+		result := AntigravitySubscriptionResult{
+			PlanType:           planType,
+			SubscriptionStatus: antigravitySubscriptionAbnormal,
+		}
+		if resp.IneligibleTiers[0] != nil {
+			result.SubscriptionError = strings.TrimSpace(resp.IneligibleTiers[0].ReasonMessage)
+		}
+		return result
+	}
+	return AntigravitySubscriptionResult{
+		PlanType: planType,
+	}
+}