chore: initial public snapshot for github upload

llm-gateway-competitors/sub2api-tar/backend/internal/service/antigravity_token_refresher.go

@@ -0,0 +1,90 @@
+package service
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strings"
+	"time"
+)
+
+const (
+	// antigravityRefreshWindow Antigravity token 提前刷新窗口：15分钟
+	// Google OAuth token 有效期55分钟，提前15分钟刷新
+	antigravityRefreshWindow = 15 * time.Minute
+)
+
+// AntigravityTokenRefresher 实现 TokenRefresher 接口
+type AntigravityTokenRefresher struct {
+	antigravityOAuthService *AntigravityOAuthService
+}
+
+func NewAntigravityTokenRefresher(antigravityOAuthService *AntigravityOAuthService) *AntigravityTokenRefresher {
+	return &AntigravityTokenRefresher{
+		antigravityOAuthService: antigravityOAuthService,
+	}
+}
+
+// CacheKey 返回用于分布式锁的缓存键
+func (r *AntigravityTokenRefresher) CacheKey(account *Account) string {
+	return AntigravityTokenCacheKey(account)
+}
+
+// CanRefresh 检查是否可以刷新此账户
+func (r *AntigravityTokenRefresher) CanRefresh(account *Account) bool {
+	return account.Platform == PlatformAntigravity && account.Type == AccountTypeOAuth
+}
+
+// NeedsRefresh 检查账户是否需要刷新
+// Antigravity 使用固定的15分钟刷新窗口，忽略全局配置
+func (r *AntigravityTokenRefresher) NeedsRefresh(account *Account, _ time.Duration) bool {
+	if !r.CanRefresh(account) {
+		return false
+	}
+	expiresAt := account.GetCredentialAsTime("expires_at")
+	if expiresAt == nil {
+		return false
+	}
+	timeUntilExpiry := time.Until(*expiresAt)
+	needsRefresh := timeUntilExpiry < antigravityRefreshWindow
+	if needsRefresh {
+		fmt.Printf("[AntigravityTokenRefresher] Account %d needs refresh: expires_at=%s, time_until_expiry=%v, window=%v\n",
+			account.ID, expiresAt.Format("2006-01-02 15:04:05"), timeUntilExpiry, antigravityRefreshWindow)
+	}
+	return needsRefresh
+}
+
+// Refresh 执行 token 刷新
+func (r *AntigravityTokenRefresher) Refresh(ctx context.Context, account *Account) (map[string]any, error) {
+	tokenInfo, err := r.antigravityOAuthService.RefreshAccountToken(ctx, account)
+	if err != nil {
+		return nil, err
+	}
+
+	newCredentials := r.antigravityOAuthService.BuildAccountCredentials(tokenInfo)
+	// 合并旧的 credentials，保留新 credentials 中不存在的字段
+	newCredentials = MergeCredentials(account.Credentials, newCredentials)
+
+	// 特殊处理 project_id：如果新值为空但旧值非空，保留旧值
+	// 这确保了即使 LoadCodeAssist 失败，project_id 也不会丢失
+	if newProjectID, _ := newCredentials["project_id"].(string); newProjectID == "" {
+		if oldProjectID := strings.TrimSpace(account.GetCredential("project_id")); oldProjectID != "" {
+			newCredentials["project_id"] = oldProjectID
+		}
+	}
+
+	// 如果 project_id 获取失败，只记录警告，不返回错误
+	// LoadCodeAssist 失败可能是临时网络问题，应该允许重试而不是立即标记为不可重试错误
+	// Token 刷新本身是成功的（access_token 和 refresh_token 已更新）
+	if tokenInfo.ProjectIDMissing {
+		if tokenInfo.ProjectID != "" {
+			// 有旧的 project_id，本次获取失败，保留旧值
+			log.Printf("[AntigravityTokenRefresher] Account %d: LoadCodeAssist 临时失败，保留旧 project_id", account.ID)
+		} else {
+			// 从未获取过 project_id，本次也失败，但不返回错误以允许下次重试
+			log.Printf("[AntigravityTokenRefresher] Account %d: LoadCodeAssist 失败，project_id 缺失，但 token 已更新，将在下次刷新时重试", account.ID)
+		}
+	}
+
+	return newCredentials, nil
+}