chore: initial public snapshot for github upload
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@@ -0,0 +1,272 @@
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package service
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"log/slog"
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"regexp"
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"strings"
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"time"
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"github.com/Wei-Shaw/sub2api/internal/pkg/antigravity"
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)
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const (
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forbiddenTypeValidation = "validation"
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forbiddenTypeViolation = "violation"
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forbiddenTypeForbidden = "forbidden"
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// 机器可读的错误码
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errorCodeForbidden = "forbidden"
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errorCodeUnauthenticated = "unauthenticated"
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errorCodeRateLimited = "rate_limited"
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errorCodeNetworkError = "network_error"
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)
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// AntigravityQuotaFetcher 从 Antigravity API 获取额度
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type AntigravityQuotaFetcher struct {
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proxyRepo ProxyRepository
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}
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// NewAntigravityQuotaFetcher 创建 AntigravityQuotaFetcher
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func NewAntigravityQuotaFetcher(proxyRepo ProxyRepository) *AntigravityQuotaFetcher {
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return &AntigravityQuotaFetcher{proxyRepo: proxyRepo}
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}
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// CanFetch 检查是否可以获取此账户的额度
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func (f *AntigravityQuotaFetcher) CanFetch(account *Account) bool {
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if account.Platform != PlatformAntigravity {
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return false
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}
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accessToken := account.GetCredential("access_token")
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return accessToken != ""
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}
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// FetchQuota 获取 Antigravity 账户额度信息
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func (f *AntigravityQuotaFetcher) FetchQuota(ctx context.Context, account *Account, proxyURL string) (*QuotaResult, error) {
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accessToken := account.GetCredential("access_token")
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projectID := account.GetCredential("project_id")
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client, err := antigravity.NewClient(proxyURL)
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if err != nil {
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return nil, fmt.Errorf("create antigravity client failed: %w", err)
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}
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// 调用 API 获取配额
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modelsResp, modelsRaw, err := client.FetchAvailableModels(ctx, accessToken, projectID)
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if err != nil {
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// 403 Forbidden: 不报错，返回 is_forbidden 标记
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var forbiddenErr *antigravity.ForbiddenError
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if errors.As(err, &forbiddenErr) {
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now := time.Now()
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fbType := classifyForbiddenType(forbiddenErr.Body)
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return &QuotaResult{
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UsageInfo: &UsageInfo{
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UpdatedAt: &now,
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IsForbidden: true,
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ForbiddenReason: forbiddenErr.Body,
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ForbiddenType: fbType,
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ValidationURL: extractValidationURL(forbiddenErr.Body),
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NeedsVerify: fbType == forbiddenTypeValidation,
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IsBanned: fbType == forbiddenTypeViolation,
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ErrorCode: errorCodeForbidden,
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},
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}, nil
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}
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return nil, err
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}
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// 调用 LoadCodeAssist 获取订阅等级和 AI Credits 余额（非关键路径，失败不影响主流程）
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tierRaw, tierNormalized, loadResp := f.fetchSubscriptionTier(ctx, client, accessToken)
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// 转换为 UsageInfo
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usageInfo := f.buildUsageInfo(modelsResp, tierRaw, tierNormalized, loadResp)
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return &QuotaResult{
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UsageInfo: usageInfo,
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Raw: modelsRaw,
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}, nil
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}
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// fetchSubscriptionTier 获取账号订阅等级，失败返回空字符串。
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// 同时返回 LoadCodeAssistResponse，以便提取 AI Credits 余额。
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func (f *AntigravityQuotaFetcher) fetchSubscriptionTier(ctx context.Context, client *antigravity.Client, accessToken string) (raw, normalized string, loadResp *antigravity.LoadCodeAssistResponse) {
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loadResp, _, err := client.LoadCodeAssist(ctx, accessToken)
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if err != nil {
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slog.Warn("failed to fetch subscription tier", "error", err)
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return "", "", nil
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}
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if loadResp == nil {
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return "", "", nil
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}
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raw = loadResp.GetTier() // 已有方法：paidTier > currentTier
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normalized = normalizeTier(raw)
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return raw, normalized, loadResp
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}
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// normalizeTier 将原始 tier 字符串归一化为 FREE/PRO/ULTRA/UNKNOWN
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func normalizeTier(raw string) string {
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if raw == "" {
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return ""
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}
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lower := strings.ToLower(raw)
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switch {
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case strings.Contains(lower, "ultra"):
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return "ULTRA"
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case strings.Contains(lower, "pro"):
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return "PRO"
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case strings.Contains(lower, "free"):
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return "FREE"
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default:
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return "UNKNOWN"
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}
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}
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// buildUsageInfo 将 API 响应转换为 UsageInfo。
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func (f *AntigravityQuotaFetcher) buildUsageInfo(modelsResp *antigravity.FetchAvailableModelsResponse, tierRaw, tierNormalized string, loadResp *antigravity.LoadCodeAssistResponse) *UsageInfo {
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now := time.Now()
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info := &UsageInfo{
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UpdatedAt: &now,
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AntigravityQuota: make(map[string]*AntigravityModelQuota),
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AntigravityQuotaDetails: make(map[string]*AntigravityModelDetail),
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SubscriptionTier: tierNormalized,
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SubscriptionTierRaw: tierRaw,
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}
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// 遍历所有模型，填充 AntigravityQuota 和 AntigravityQuotaDetails
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for modelName, modelInfo := range modelsResp.Models {
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if modelInfo.QuotaInfo == nil {
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continue
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}
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// remainingFraction 是剩余比例 (0.0-1.0)，转换为使用率百分比
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utilization := int((1.0 - modelInfo.QuotaInfo.RemainingFraction) * 100)
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info.AntigravityQuota[modelName] = &AntigravityModelQuota{
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Utilization: utilization,
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ResetTime: modelInfo.QuotaInfo.ResetTime,
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}
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// 填充模型详细能力信息
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detail := &AntigravityModelDetail{
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DisplayName: modelInfo.DisplayName,
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SupportsImages: modelInfo.SupportsImages,
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SupportsThinking: modelInfo.SupportsThinking,
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ThinkingBudget: modelInfo.ThinkingBudget,
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Recommended: modelInfo.Recommended,
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MaxTokens: modelInfo.MaxTokens,
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MaxOutputTokens: modelInfo.MaxOutputTokens,
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SupportedMimeTypes: modelInfo.SupportedMimeTypes,
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}
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info.AntigravityQuotaDetails[modelName] = detail
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}
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// 废弃模型转发规则
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if len(modelsResp.DeprecatedModelIDs) > 0 {
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info.ModelForwardingRules = make(map[string]string, len(modelsResp.DeprecatedModelIDs))
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for oldID, deprecated := range modelsResp.DeprecatedModelIDs {
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info.ModelForwardingRules[oldID] = deprecated.NewModelID
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}
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}
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// 同时设置 FiveHour 用于兼容展示（取主要模型）
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priorityModels := []string{"claude-sonnet-4-20250514", "claude-sonnet-4", "gemini-2.5-pro"}
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for _, modelName := range priorityModels {
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if modelInfo, ok := modelsResp.Models[modelName]; ok && modelInfo.QuotaInfo != nil {
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utilization := (1.0 - modelInfo.QuotaInfo.RemainingFraction) * 100
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progress := &UsageProgress{
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Utilization: utilization,
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}
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if modelInfo.QuotaInfo.ResetTime != "" {
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if resetTime, err := time.Parse(time.RFC3339, modelInfo.QuotaInfo.ResetTime); err == nil {
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progress.ResetsAt = &resetTime
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progress.RemainingSeconds = int(time.Until(resetTime).Seconds())
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}
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}
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info.FiveHour = progress
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break
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}
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}
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if loadResp != nil {
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for _, credit := range loadResp.GetAvailableCredits() {
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info.AICredits = append(info.AICredits, AICredit{
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CreditType: credit.CreditType,
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Amount: credit.GetAmount(),
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MinimumBalance: credit.GetMinimumAmount(),
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})
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}
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}
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return info
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}
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// GetProxyURL 获取账户的代理 URL
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func (f *AntigravityQuotaFetcher) GetProxyURL(ctx context.Context, account *Account) string {
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if account.ProxyID == nil || f.proxyRepo == nil {
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return ""
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}
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proxy, err := f.proxyRepo.GetByID(ctx, *account.ProxyID)
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if err != nil || proxy == nil {
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return ""
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}
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return proxy.URL()
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}
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// classifyForbiddenType 根据 403 响应体判断禁止类型
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func classifyForbiddenType(body string) string {
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lower := strings.ToLower(body)
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switch {
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case strings.Contains(lower, "validation_required") ||
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strings.Contains(lower, "verify your account") ||
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strings.Contains(lower, "validation_url"):
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return forbiddenTypeValidation
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case strings.Contains(lower, "terms of service") ||
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strings.Contains(lower, "violation"):
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return forbiddenTypeViolation
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default:
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return forbiddenTypeForbidden
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}
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}
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// urlPattern 用于从 403 响应体中提取 URL（降级方案）
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var urlPattern = regexp.MustCompile(`https://[^\s"'\\]+`)
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// extractValidationURL 从 403 响应 JSON 中提取验证/申诉链接
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func extractValidationURL(body string) string {
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// 1. 尝试结构化 JSON 提取: /error/details[*]/metadata/validation_url 或 appeal_url
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var parsed struct {
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Error struct {
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Details []struct {
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Metadata map[string]string `json:"metadata"`
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} `json:"details"`
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} `json:"error"`
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}
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if json.Unmarshal([]byte(body), &parsed) == nil {
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for _, detail := range parsed.Error.Details {
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if u := detail.Metadata["validation_url"]; u != "" {
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return u
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}
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if u := detail.Metadata["appeal_url"]; u != "" {
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return u
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}
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}
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}
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// 2. 降级：正则匹配 URL
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lower := strings.ToLower(body)
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if !strings.Contains(lower, "validation") &&
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!strings.Contains(lower, "verify") &&
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!strings.Contains(lower, "appeal") {
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return ""
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}
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// 先解码常见转义再匹配
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normalized := strings.ReplaceAll(body, `\u0026`, "&")
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if m := urlPattern.FindString(normalized); m != "" {
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return m
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}
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return ""
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}
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