File: cupshelper.cxx

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/*
 *   XPP - The X Printing Panel
 *   --------------------------
 *
 *   cupsHelper - This class was originally written by Michael Goffioul
 *   (e-mail: gofioul@emic.ucl.ac.be) for QTCUPS, another excellent
 *   printing frontend for CUPS. This version has the same functions,
 *   but is more general and it is not dependent on QT.
 *
 *   Thank you for your great work, Michael!
 *
 *   See the header file (cupshelper.h) for an overview of the fields and
 *   methods.
 *
 *   Copyright 2000 by Till Kamppeter and Michael Goffioul
 *
 *   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 of the
 *   License, 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; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 *   02111-1307  USA
 *
 */

#include "config.h"
#include "cupshelper.h"
#include "passworddialog.h"

#include <stdlib.h>
#include <stdio.h>
#include <cups/language.h>

//*******************************************************
//* CUPS library callback function for getting password *
//*******************************************************

const char* cupsGetPasswordCB(const char* prompt)
{
	return CupsHelper::cupsGetPassword(prompt);
}

const char* cupsUseCachedPasswordCB(const char* prompt)
{
	return CupsHelper::cupsUseCachedPassword(prompt);
}

//**************************************************************************

char	CupsHelper::host_[256] = "";
int	CupsHelper::port_ = -1;
char    CupsHelper::login_[256] = "";
char    CupsHelper::password_[256] = "";

CupsHelper::CupsHelper(){}
CupsHelper::~CupsHelper(){}

const char* CupsHelper::host(){
  return host_;
}

int CupsHelper::port(){
  return port_;
}

void CupsHelper::setHostInfo(const char *host, int port){
  strcpy(host_,host);
  cupsSetServer(host_);
  port_ = port;
  ippSetPort(port_);
}

void CupsHelper::setLoginInfo(const char *usr, const char *pwd){
  strcpy(login_,usr);
  cupsSetUser(login_);
  strcpy(password_,pwd);
}

const char* CupsHelper::login(){
  return login_;
}

const char* CupsHelper::password(){
  return password_;
}

ipp_t* CupsHelper::newIppRequest(){
  ipp_t	*request = ippNew();
  request->request.op.request_id = 1;
  cups_lang_t	*lang = cupsLangDefault();
  ippAddString(request,IPP_TAG_OPERATION,IPP_TAG_CHARSET,"attributes-charset",NULL,cupsLangEncoding(lang));
  ippAddString(request,IPP_TAG_OPERATION,IPP_TAG_LANGUAGE,"attributes-natural-language",NULL,lang->language);
  return request;
}

ipp_t* CupsHelper::processRequest(ipp_t *req, const char *res){
  http_t	*HTTP = httpConnect(host_,port_);
  if (!HTTP) {
    ippDelete(req);
    return 0;
  }
  ipp_t	*answer = cupsDoRequest(HTTP,req,res);
  httpClose(HTTP);
  if (!answer)
    return 0;
  if (answer->state == IPP_ERROR || answer->state == IPP_IDLE) {
    ippDelete(answer);
    return 0;
  }
  return answer;
}

bool CupsHelper::checkHost(){
  http_t	*HTTP = httpConnect(host_,port_);
  if (!HTTP) return false;
  httpClose(HTTP);
  return true;
}

const char* CupsHelper::cupsGetPassword(const char* prompt){
  char login[256];
  const char *passwd;
  strcpy(login,login_);
  // open a dialog to ask for password
  passwd = passworddialog(prompt,login,password());
  if (passwd) {
    setLoginInfo(login,passwd);
    return passwd;
  } else {
    setLoginInfo(login,"");
    return NULL;
  }
}

const char* CupsHelper::cupsUseCachedPassword(const char* prompt){
  return password_;
}

void CupsHelper::askForPassword(){
  cupsSetPasswordCB(cupsGetPasswordCB);
}

void CupsHelper::useCachedPassword(){
  cupsSetPasswordCB(cupsUseCachedPasswordCB);
}

void CupsHelper::setup(){
  if (strcmp(host_,"") == 0) strcpy(host_,cupsServer());
  if (host_[0] == '/') strcpy(host_,"localhost");
  if (strcmp(login_,"") == 0) strcpy(login_,cupsUser());
  if (port_ < 0) port_ = ippPort();
  askForPassword();
}

int CupsHelper::printerType(const char *name){
  ipp_t	  *request = newIppRequest();
  char      str[256];
  int	  value(-1);
  
  request->request.op.operation_id = IPP_GET_PRINTER_ATTRIBUTES;
  sprintf(str,"ipp://%s:%d/printers/%s",host(),port(),name);
  ippAddString(request,IPP_TAG_OPERATION,IPP_TAG_URI,"printer-uri",NULL,str);
  //sprintf(str,"/printers/%s",name);
  sprintf(str,"/printers/");
  request = processRequest(request,str);
  if (request && request->curtag == IPP_TAG_PRINTER) {
    ipp_attribute_t	*attr = ippFindAttribute(request,"printer-type",IPP_TAG_ENUM);
    if (attr) value = attr->values[0].integer;
  }
  ippDelete(request);
  return value;
}