/*
 * uHTTPD (Micro HTTP server) cookie functions
 *
 * Copyright 2009 Francesco Saverio Giudice <info / at / fsgiudice.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file LICENSE.txt.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA (or visit https://www.gnu.org/licenses/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

#include "hbclass.ch"

MEMVAR _COOKIE

FUNCTION uhttpd_CookieNew( cDomain, cPath, nExpireDays, nExpireSecs )
   RETURN uhttpd_Cookie():New( cDomain, cPath, nExpireDays, nExpireSecs )

CLASS uhttpd_Cookie

   // Data for cookies
   VAR aCookies           INIT {}  // Using an array to mantain order
   VAR cDomain
   VAR cPath              INIT "/"
   VAR cExpire
   VAR lSecure            INIT .F.
   VAR lHttpOnly
   VAR nExpireDays        INIT 0
   VAR nExpireSecs        INIT 7200       // 1 hour  - TODO set environment constant
   VAR lCookiesSent       INIT .F.

   METHOD SetCookie( cCookieName, xValue, cDomain, cPath, cExpires, lSecure, lHttpOnly )
   METHOD DeleteCookie( cCookieName, cDomain, cPath, lSecure )
   METHOD DeleteAllCookies( cDomain, cPath, lSecure )
   METHOD GetCookie( cCookieName )
   METHOD IsCookie( cCookieName )  INLINE ::GetCookie( cCookieName ) != NIL
   METHOD IsCookies()      INLINE ! Empty( ::aaCookieToSet )
   METHOD SetCookieDefaults( cDomain, cPath, nExpireDays, nExpireSecs )

ENDCLASS

// ------------------------------

METHOD SetCookieDefaults( cDomain, cPath, nExpireDays, nExpireSecs ) CLASS uhttpd_Cookie

   IF cDomain != NIL
      ::cDomain := cDomain
   ENDIF
   IF cPath != NIL
      ::cPath := cPath
   ENDIF
   IF nExpireDays != NIL
      ::nExpireDays := nExpireDays
   ENDIF
   IF nExpireSecs != NIL
      ::nExpireSecs := nExpireSecs
   ENDIF

   RETURN NIL

METHOD SetCookie( cCookieName, xValue, cDomain, cPath, cExpires, lSecure, lHttpOnly ) CLASS uhttpd_Cookie

   LOCAL cStr, nPos, nCookies

   __defaultNIL( @cDomain, ::cDomain )
   __defaultNIL( @cPath, ::cPath )
   __defaultNIL( @lHttpOnly, .F. )

   IF cExpires == NIL
      cExpires := uhttpd_DateToGMT( Date(), Time(), ::nExpireDays, ::nExpireSecs )
   ENDIF

   ::lHttpOnly := lHttpOnly

   IF xValue != NIL
      // Search if a cookie already exists
      // case sensitive
      IF ( nPos := AScan( ::aCookies, {| e | e[ 1 ] == cCookieName } ) ) > 0
         ::aCookies[ nPos ][ 2 ] := uhttpd_UrlEncode( hb_CStr( xValue ) )
      ELSE
         AAdd( ::aCookies, { cCookieName, uhttpd_UrlEncode( hb_CStr( xValue ) ) } )
      ENDIF
   ELSE
      IF ( nPos := AScan( ::aCookies, {| e | e[ 1 ] == cCookieName } ) ) > 0
         hb_ADel( ::aCookies, nPos, .T. )
      ENDIF
   ENDIF

   // Rebuild cookie string as per RFC2616 (comma separated list)
   cStr     := ""
   nCookies := Len( ::aCookies )
   AEval( ::aCookies, {| e, i | cStr += e[ 1 ] + "=" + e[ 2 ] + iif( i < nCookies, ",", "" ) } )

   // cStr := cCookieName + "=" + uhttpd_UrlEncode( hb_CStr( xValue ) )

   IF cDomain != NIL
      cStr += "; domain=" + cDomain
   ENDIF
   IF cPath != NIL
      cStr += "; path=" + cPath
   ENDIF
   IF cExpires != NIL
      cStr += "; expires=" + cExpires
   ENDIF
   IF HB_ISLOGICAL( lSecure ) .AND. lSecure
      cStr += "; secure"
   ENDIF

   // Send the header
   // uhttpd_SetHeader( "Set-Cookie", cStr, .F. )
   uhttpd_SetHeader( "Set-Cookie", cStr )

   RETURN NIL

METHOD DeleteCookie( cCookieName, cDomain, cPath, lSecure ) CLASS uhttpd_Cookie

   LOCAL cExpires := uhttpd_DateToGMT( Date() - 1 ) // Setting date in the past delete cookie

   ::SetCookie( cCookieName, "", cDomain, cPath, cExpires, lSecure )

   RETURN NIL

METHOD DeleteAllCookies( cDomain, cPath, lSecure ) CLASS uhttpd_Cookie

   LOCAL cCookieName

   FOR EACH cCookieName IN _COOKIE:Keys
      // ::DeleteCookie( SubStr( cCookieName, 2 ), cDomain, cPath, lSecure )
      ::DeleteCookie( cCookieName, cDomain, cPath, lSecure )
   NEXT

   RETURN NIL

METHOD GetCookie( cCookieName ) CLASS uhttpd_Cookie

   LOCAL cHeader, cRet
   LOCAL nPos := 1

   DO WHILE .T.
      IF ( cHeader := uhttpd_GetHeader( "Set-Cookie", @nPos ) ) != NIL
         IF cHeader == cCookieName
            cRet := cHeader
            EXIT
         ELSE
            nPos++
         ENDIF
      ELSE
         EXIT
      ENDIF
   ENDDO

   RETURN cRet