feat: 固定创建真实采购任务 (#112)

admin/repository/client.go

@@ -22,6 +22,18 @@ func ClientPurchaseMode(q Execer, clientID string) (string, error) {
 	return ParseClientPurchaseMode(raw.String), nil
 }
 
+// ClientSeenAfter 判断客户端是否在指定 UTC 时间之后上报过活动。
+func ClientSeenAfter(q Execer, clientID, cutoff string) (bool, error) {
+	var online bool
+	if err := q.QueryRow(
+		`SELECT EXISTS(SELECT 1 FROM clients WHERE client_id = ? AND last_seen_at >= ?)`,
+		clientID, cutoff,
+	).Scan(&online); err != nil {
+		return false, fmt.Errorf("检查客户端 %s 在线状态失败: %w", clientID, err)
+	}
+	return online, nil
+}
+
 // ParseClientPurchaseMode 把登记能力转成安全的固定值，供列表和创建校验共用。
 func ParseClientPurchaseMode(raw string) string {
 	var capabilities struct {