server_protocol.h

/*
    Copyright (c) 2014 by Elvis Angelaccio

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.
*/

#ifndef SERVER_PROTOCOL_H
#define SERVER_PROTOCOL_H

#include <string>
#include <vector>
#include <map>

#include "protocol.h"
#include "../entity/DataItem.h"
#include "../entity/SetDescriptor.h"

namespace net
{

    class RequestMessage
    {
    public:
        RequestMessage();
        RequestMessage(Command cmd);

        Command getCommand();
        void setDssName(const std::string& name);
        std::string getDssName() const;

        friend std::ostream& operator<<(std::ostream& os, const RequestMessage& msg);

    protected:

        Command command;
        std::string dssName;
    };



    class InsertRequest : public RequestMessage
    {
    public:
        InsertRequest();
            
        void setSdSize(int s);
        const std::map<std::string, std::string>& getSdFields() const;
        const std::vector<entity::DataItem>& getDataItems() const;
        void addSetDescriptorField(const std::string& key, const std::string& value);
        void addDataItem(const entity::DataItem& dataItem);
        void addItemOriginalSize(const std::string& itemName, size_t s);

        friend std::ostream& operator<<(std::ostream& os, const InsertRequest& msg);

    private:
        
        int sdSize;                                             
        std::map<std::string, std::string> setDescriptorFields;     
        std::vector<entity::DataItem> dataItems;                    
    };


    class DataSetRequest : public RequestMessage
    {
    public:
        DataSetRequest(Command cmd);

        void setSequenceNumber(int sn);
        int getSequenceNumber() const;

        friend std::ostream& operator<<(std::ostream& os, const DataSetRequest& msg);

    private:

        int sequenceNumber;
    };

    class SearchRequest : public RequestMessage
    {

    public:

        SearchRequest();

        void setSdQuerySize(int s);
        void addSdQueryField(const std::string& key, const std::string& value);
        const std::map<std::string, std::string>& getQueryFields() const;

        friend std::ostream& operator<<(std::ostream& os, const SearchRequest& msg);

    private:

        int sdQuerySize;
        std::map<std::string, std::string> sdQueryFields;

    };
    

    class ProtocolHandler
    {

    public:
        
        RequestMessage *parseRequest(const std::string& request);
        
        /* Create response messages to GET and SEARCH request messaes. */
        std::string createGetResponse(int sequenceNumber, const std::map<std::string, std::string>& sdFields, const std::map<std::string, std::string>& dataItems);
        std::string createSearchResponse(const std::vector<entity::SetDescriptor>& descriptorList);

    private:
        
        /* Convenience functions for the parseRequest() main function. */
        InsertRequest *parseInsertRequest(std::istringstream& parser);
        DataSetRequest *parseDataSetRequest(std::istringstream& parser, Command cmd);
        SearchRequest *parseSearchRequest(std::istringstream& parser);
    };

    std::string commandString(Command cmd);
}

#endif