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/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
    Copyright (c) 1997-2006, Destroyer Studios LLC.

     AUTHOR:       John DiCamillo


     OVERVIEW
     ========
     Network Server Pump for HTTP Server
*/


#ifndef HttpServer_h
#define HttpServer_h

#include "NetServer.h"

// +-------------------------------------------------------------------+

class HttpParam;
class HttpRequest;
class HttpResponse;

// +-------------------------------------------------------------------+

class HttpServer : public NetServer
{
public:
    static const char* TYPENAME() { return "HttpServer"; }

    HttpServer(WORD port, int poolsize=1);
    virtual ~HttpServer();

    int operator == (const HttpServer& l) const { return addr == l.addr; }

    virtual Text      ProcessRequest(Text request, const NetAddr& addr);
    virtual Text      DefaultResponse();
    virtual Text      ErrorResponse();

    virtual bool      DoGet(HttpRequest& request,  HttpResponse& response);
    virtual bool      DoPost(HttpRequest& request, HttpResponse& response);
    virtual bool      DoHead(HttpRequest& request, HttpResponse& response);

    virtual Text      GetServerName();
    virtual void      SetServerName(const char* name);

protected:
    Text              http_server_name;
};

// +-------------------------------------------------------------------+

class HttpParam
{
public:
    static const char* TYPENAME() { return "HttpParam"; }

    HttpParam(const char* n, const char* v) : name(n), value(v) { }

    int operator == (const HttpParam& p) const { return name == p.name; }

    Text  name;
    Text  value;
};

// +-------------------------------------------------------------------+

class HttpRequest
{
public:
    static const char* TYPENAME() { return "HttpRequest"; }

    enum METHOD {
        HTTP_OPTIONS,
        HTTP_GET,
        HTTP_HEAD,
        HTTP_POST,
        HTTP_PUT,
        HTTP_DELETE,
        HTTP_TRACE,
        HTTP_CONNECT
    };

    HttpRequest(const char* request=0);
    ~HttpRequest();

    operator Text();

    void              ParseRequest(Text request);
    void              ParseCookie(const char* param);

    int               Method()       const { return method;        }
    Text              URI()          const { return uri;           }
    Text              Content()      const { return content;       }
    Text              RequestLine()  const { return request_line;  }

    List<HttpParam>&  GetQuery()           { return query;         }
    List<HttpParam>&  GetHeaders()         { return headers;       }
    List<HttpParam>&  GetCookies()         { return cookies;       }

    NetAddr           GetClientAddr()            const { return client_addr; }
    void              SetClientAddr(const NetAddr& a)  { client_addr = a;    }

    Text              GetParam(const char* name);

    Text              GetHeader(const char* name);
    void              SetHeader(const char* name, const char* value);
    void              AddHeader(const char* name, const char* value);
    Text              GetCookie(const char* name);
    void              SetCookie(const char* name, const char* value);
    void              AddCookie(const char* name, const char* value);

    Text              DecodeParam(const char* value);
    static Text       EncodeParam(const char* value);

private:
    int               method;
    Text              uri;
    Text              content;
    Text              request_line;
    NetAddr           client_addr;

    List<HttpParam>   query;
    List<HttpParam>   headers;
    List<HttpParam>   cookies;
};

// +-------------------------------------------------------------------+

class HttpResponse
{
public:
    static const char* TYPENAME() { return "HttpResponse"; }

    enum STATUS {
        SC_CONTINUE             = 100,
        SC_SWITCHING_PROTOCOLS  = 101,

        SC_OK                   = 200,
        SC_CREATED              = 201,
        SC_ACCEPTED             = 202,
        SC_NON_AUTHORITATIVE    = 203,
        SC_NO_CONTENT           = 204,
        SC_RESET_CONTENT        = 205,
        SC_PARTIAL_CONTENT      = 206,

        SC_MULTIPLE_CHOICES     = 300,
        SC_MOVED_PERMANENTLY    = 301,
        SC_FOUND                = 302,
        SC_SEE_OTHER            = 303,
        SC_NOT_MODIFIED         = 304,
        SC_USE_PROXY            = 305,
        SC_TEMPORARY_REDIRECT   = 307,

        SC_BAD_REQUEST          = 400,
        SC_UNAUTHORIZED         = 401,
        SC_PAYMENT_REQUIRED     = 402,
        SC_FORBIDDEN            = 403,
        SC_NOT_FOUND            = 404,
        SC_METHOD_NOT_ALLOWED   = 405,
        SC_NOT_ACCEPTABLE       = 406,
        SC_PROXY_AUTH_REQ       = 407,
        SC_REQUEST_TIME_OUT     = 408,
        SC_CONFLICT             = 409,
        SC_GONE                 = 410,
        SC_LENGTH_REQUIRED      = 411,

        SC_SERVER_ERROR         = 500,
        SC_NOT_IMPLEMENTED      = 501,
        SC_BAD_GATEWAY          = 502,
        SC_SERVICE_UNAVAILABLE  = 503,
        SC_GATEWAY_TIMEOUT      = 504,
        SC_VERSION_NOT_SUPPORTED= 505
    };


    HttpResponse(int status=500, const char* content=0);
    HttpResponse(const char* response);
    ~HttpResponse();

    operator Text();

    void              ParseResponse(Text request);
    void              ParseCookie(const char* param);

    int               Status()       const { return status;  }
    void              SetStatus(int s)     { status = s;     }

    Text              Content()      const { return content; }
    void              SetContent(Text t)   { content = t;    }
    void              AddContent(Text t)   { content += t;   }

    List<HttpParam>&  GetHeaders()         { return headers; }
    List<HttpParam>&  GetCookies()         { return cookies; }

    Text              GetHeader(const char* name);
    void              SetHeader(const char* name, const char* value);
    void              AddHeader(const char* name, const char* value);
    Text              GetCookie(const char* name);
    void              SetCookie(const char* name, const char* value);
    void              AddCookie(const char* name, const char* value);

    void              SendRedirect(const char* url);

private:
    int               status;
    Text              content;

    List<HttpParam>   headers;
    List<HttpParam>   cookies;
};


#endif  // HttpServer_h