text: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   *
   */
  
  #pragma once
  
  #include <vector>
  #include <string>
  #include <event2/buffer.h>
  
  #include "status.h"
  
  class Server;
  
  namespace Redis {
  
  using CommandTokens = std::vector<std::string>;
  
  class Connection;
  
  class Request {
   public:
    explicit Request(Server *svr) : svr_(svr) {}
    // Not copyable
    Request(const Request &) = delete;
    Request &operator=(const Request &) = delete;
  
    // Parse the redis requests (bulk string array format)
    Status Tokenize(evbuffer *input);
  
    const std::vector<CommandTokens> &GetCommands() { return commands_; }
    void ClearCommands() { commands_.clear(); }
  
   private:
    // internal states related to parsing
  
    enum ParserState { ArrayLen, BulkLen, BulkData };
    ParserState state_ = ArrayLen;
    size_t multi_bulk_len_ = 0;
    size_t bulk_len_ = 0;
    CommandTokens tokens_;
    std::vector<CommandTokens> commands_;
  
    Server *svr_;
  };
  
  }  // namespace Redis
  