#include <a_samp>
#include <a_http>

#if ( !defined MAILER_MAX_MAIL_SIZE )
    #define MAILER_MAX_MAIL_SIZE  (1024)
#endif

#if ( !defined MAILER_URL )
    #error Please define MAILER_URL before including the mailer include.
#endif

stock SendMail( const szReceiver[ ], const szSenderMail[ ], const szSenderName[ ], const szSubject[ ], const szMessage[ ] )
{
    new
        szBuffer[ MAILER_MAX_MAIL_SIZE ] = "t=",
        iPos    = strlen( szBuffer ),
        iLength = strlen( szReceiver )
    ;

    memcpy( szBuffer, szReceiver, iPos * 4, ( iLength + 1 ) * 4 );

    StringURLEncode( szBuffer[ iPos ], 1024 - iPos );

    strcat( szBuffer, "&f=" );

    iPos    = strlen( szBuffer );
    iLength = strlen( szSenderName );

    memcpy( szBuffer, szSenderName, iPos * 4, ( iLength + 1 ) * 4 );

    StringURLEncode( szBuffer[ iPos ], 1024 - iPos );

    strcat( szBuffer, "&n=" );

    iPos    = strlen( szBuffer );
    iLength = strlen( szSenderMail );

    memcpy( szBuffer, szSenderMail, iPos * 4, ( iLength + 1 ) * 4 );

    StringURLEncode( szBuffer[ iPos ], 1024 - iPos );

    strcat( szBuffer, "&s=" );

    iPos    = strlen( szBuffer );
    iLength = strlen( szSubject );

    memcpy( szBuffer, szSubject, iPos * 4, ( iLength + 1 ) * 4 );

    StringURLEncode( szBuffer[ iPos ], 1024 - iPos );

    strcat( szBuffer, "&m=" );

    iPos    = strlen( szBuffer );
    iLength = strlen( szMessage );

    memcpy( szBuffer, szMessage, iPos * 4, ( iLength + 1 ) * 4 );

    StringURLEncode( szBuffer[ iPos ], 1024 - iPos );

    HTTP( 0xD00D, HTTP_POST, MAILER_URL, szBuffer, "OnMailScriptResponse" );
}

forward OnMailScriptResponse( iIndex, iResponseCode, const szData[ ] );
public  OnMailScriptResponse( iIndex, iResponseCode, const szData[ ] )
{
    if ( szData[ 0 ] )
        printf( "Mailer script says: %s", szData );
}

stock StringURLEncode( szString[ ], iSize = sizeof( szString ) )
{
    for ( new i = 0, l = strlen( szString ); i < l; i++ )
    {
        switch ( szString[ i ] )
        {
            case '!', '(', ')', '\'', '*',
                 '0' .. '9',
                 'A' .. 'Z',
                 'a' .. 'z':
            {
                continue;
            }

            case ' ':
            {
                szString[ i ] = '+';

                continue;
            }
        }

        new
            s_szHex[ 8 ]
        ;

        if ( i + 3 >= iSize )
        {
            szString[ i ] = EOS;

            break;
        }

        if ( l + 3 >= iSize )
            szString[ iSize - 3 ] = EOS;

        format( s_szHex, sizeof( s_szHex ), "%02h", szString[ i ] );

        szString[ i ] = '%';

        strins( szString, s_szHex, i + 1, iSize );

        l += 2;
        i += 2;

        if ( l > iSize - 1 )
            l = iSize - 1;
    }
}