first commit

backend/internal/service/antigravity_token_refresher.go

@@ -0,0 +1,65 @@
+package service
+
+import (
+	"context"
+	"fmt"
+	"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,
+	}
+}
+
+// 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)
+	for k, v := range account.Credentials {
+		if _, exists := newCredentials[k]; !exists {
+			newCredentials[k] = v
+		}
+	}
+
+	return newCredentials, nil
+}