/****************************************************************************
 * NCSA Mosaic for the X Window System                                      *
 * Software Development Group                                               *
 * National Center for Supercomputing Applications                          *
 * University of Illinois at Urbana-Champaign                               *
 * 605 E. Springfield, Champaign IL 61820                                   *
 * mosaic@ncsa.uiuc.edu                                                     *
 *                                                                          *
 * Copyright (C) 1993, Board of Trustees of the University of Illinois      *
 *                                                                          *
 * NCSA Mosaic software, both binary and source (hereafter, Software) is    *
 * copyrighted by The Board of Trustees of the University of Illinois       *
 * (UI), and ownership remains with the UI.                                 *
 *                                                                          *
 * The UI grants you (hereafter, Licensee) a license to use the Software    *
 * for academic, research and internal business purposes only, without a    *
 * fee.  Licensee may distribute the binary and source code (if released)   *
 * to third parties provided that the copyright notice and this statement   *
 * appears on all copies and that no charge is associated with such         *
 * copies.                                                                  *
 *                                                                          *
 * Licensee may make derivative works.  However, if Licensee distributes    *
 * any derivative work based on or derived from the Software, then          *
 * Licensee will (1) notify NCSA regarding its distribution of the          *
 * derivative work, and (2) clearly notify users that such derivative       *
 * work is a modified version and not the original NCSA Mosaic              *
 * distributed by the UI.                                                   *
 *                                                                          *
 * Any Licensee wishing to make commercial use of the Software should       *
 * contact the UI, c/o NCSA, to negotiate an appropriate license for such   *
 * commercial use.  Commercial use includes (1) integration of all or       *
 * part of the source code into a product for sale or license by or on      *
 * behalf of Licensee to third parties, or (2) distribution of the binary   *
 * code or source code to third parties that need it to utilize a           *
 * commercial product sold or licensed by or on behalf of Licensee.         *
 *                                                                          *
 * UI MAKES NO REPRESENTATIONS ABOUT THE SUITABILITY OF THIS SOFTWARE FOR   *
 * ANY PURPOSE.  IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED          *
 * WARRANTY.  THE UI SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY THE    *
 * USERS OF THIS SOFTWARE.                                                  *
 *                                                                          *
 * By using or copying this Software, Licensee agrees to abide by the       *
 * copyright law and all other applicable laws of the U.S. including, but   *
 * not limited to, export control laws, and the terms of this license.      *
 * UI shall have the right to terminate this license immediately by         *
 * written notice upon Licensee's breach of, or non-compliance with, any    *
 * of its terms.  Licensee may be held legally responsible for any          *
 * copyright infringement that is caused or encouraged by Licensee's        *
 * failure to abide by the terms of this license.                           *
 *                                                                          *
 * Comments and questions are welcome and can be sent to                    *
 * mosaic-x@ncsa.uiuc.edu.                                                  *
 ****************************************************************************/

/* Interface for mailto: URLs, stolen from techsupport.c */
#include "../config.h"
#include "mosaic.h"
#include "gui.h"
#include <stdio.h>

#include "../libnut/url-utils.h"
#include "libnut/system.h"

#ifndef DISABLE_TRACE
extern int srcTrace;
#endif

extern int do_post;
extern char *post_content_type;
extern char *post_data;
extern char pre_title[80];

extern mo_window *current_win;
mo_status mo_post_mailto_form_win (char *to_address, char *subject);
mo_status mo_send_mailto_message (char *text, char *to, char *subj, 
				  char *content_type, char *url);
void do_mailto_post(mo_window *win, char *to, char *from, char *subject, 
		    char *body);

/* ----------------------- mo_post_mailto_window ------------------------ */
static XmxCallback (include_fsb_cb)
{
  char *fname, efname[MO_LINE_LENGTH];
  FILE *fp;
  char line[MO_LINE_LENGTH], *status;

  mo_window *win = mo_fetch_window_by_id (XmxExtractUniqid ((int)client_data));

  if (!win)
    return;

  XtUnmanageChild (win->mail_fsb_win);
  fname = (char *)malloc (128 * sizeof (char));
  
  XmStringGetLtoR (((XmFileSelectionBoxCallbackStruct *)call_data)->value,
                   XmSTRING_DEFAULT_CHARSET,
                   &fname);


  pathEval (efname, fname);

  fp = fopen (efname, "r");
  if (!fp)
    {
        char *buf, *final, tmpbuf[80];
	int final_len;

        buf=my_strerror(errno);
        if (!buf || !*buf || !strcmp(buf,"Error 0")) {
                sprintf(tmpbuf,"Unknown Error");
                buf=tmpbuf;
	}

        final_len=30+((!efname || !*efname?3:strlen(efname))+13)+15+(strlen(buf)+13);
        final=(char *)calloc(final_len,sizeof(char));

        strcpy(final,"\nUnable to Open File:\n");
        sprintf(final+strlen(final),"   %s\n",(!efname || !*efname?" ":efname));
        sprintf(final+strlen(final),"\nOpen Error:\n");
        sprintf(final+strlen(final),"   %s\n",buf);

	XmxMakeErrorDialog (win->mailto_win, 
                          final, 
                          "Open Error");
	XtManageChild (Xmx_w);

	if (final) {
		free(final);
		final=NULL;
	}
      return;
    }
  
  while (1)
    {
      long pos;
      status = fgets (line, MO_LINE_LENGTH, fp);
      if (!status || !(*line))
	break;
      
      XmTextInsert (win->mailto_text,
                    pos = XmTextGetInsertionPosition (win->mailto_text),
                    line);
      /* move insertion position to past this line to avoid inserting the
         lines in reverse order */
      XmTextSetInsertionPosition (win->mailto_text, pos + strlen(line));
    }

  return;
}

static XmxCallback (mailto_win_cb)
{
  mo_window *win = mo_fetch_window_by_id (XmxExtractUniqid ((int)client_data));
  char *msg, *subj, *to;
  long pos;
  
  
  switch (XmxExtractToken ((int)client_data))
    {
    case 0:  /* send */
      XtUnmanageChild (win->mailto_win);
      
      msg = XmxTextGetString (win->mailto_text);
      if (!msg)
        return;
      if (msg[0] == '\0')
        return;

      
      to = XmxTextGetString (win->mailto_tofield);
      subj = XmxTextGetString (win->mailto_subfield);

      mo_send_mailto_message (msg, to, subj, "text/plain", 
			      win->current_node->url);
      free (msg);
      free (to);
      free (subj);

      break;
    case 1:   /* dismiss */
      XtUnmanageChild (win->mailto_win); 
      /* Do nothing. */
      break;
    case 2:   /* help */
      mo_open_another_window
        (win, 
         mo_assemble_help_url ("help-on-mailto.html"),
         NULL, NULL);
      break;
      
    case 3:    /* insert file */
	if (!win->mail_fsb_win) {
	    win->mail_fsb_win = XmxMakeFileSBDialog
		(win->mailto_win,
		 "NCSA Mosaic: Include File In Mail Message",
		 "Name of file to include:",
		 include_fsb_cb, 0);
	} else {
	    XmFileSelectionDoSearch (win->mail_fsb_win, NULL);
	}
	
	XmxManageRemanage (win->mail_fsb_win);
	break;
    case 4:
        if(win->current_node->url){
            XmTextInsert (win->mailto_text,
                          pos = XmTextGetInsertionPosition (win->mailto_text),
                          win->current_node->url);
                /* move insertion position to past this line
                   to avoid inserting the lines in reverse order */
            XmTextSetInsertionPosition (win->mailto_text,
                                        pos + strlen(win->current_node->url));
        }
        break;
    }

  return;
}

static XmxCallback (mailto_form_win_cb)
{
  mo_window *win = mo_fetch_window_by_id (XmxExtractUniqid ((int)client_data));
  char *subj, *to, *namestr;
  
  switch (XmxExtractToken ((int)client_data))
    {
    case 0:  /* send */
      XtUnmanageChild (win->mailto_form_win);
      
      to = XmxTextGetString (win->mailto_form_tofield);
      subj = XmxTextGetString (win->mailto_form_subfield);
      namestr = XmxTextGetString(win->mailto_form_fromfield);

      do_mailto_post(win,to,namestr,subj,win->post_data);

      free (namestr);
      free (to);
      free (subj);
      if (win->post_data) {
	free (win->post_data);
	win->post_data=NULL;
      }

      break;
    case 1:   /* dismiss */
      XtUnmanageChild (win->mailto_form_win); 
      /* Do nothing. */
      if (win->post_data) {
	free (win->post_data);
	win->post_data=NULL;
      }

      break;
    case 2:   /* help */
      mo_open_another_window
        (win, 
         mo_assemble_help_url ("help-on-mailto-form.html"),
         NULL, NULL);
      break;
    }

  return;
}

mo_status mo_post_mailto_win (char *to_address, char *subject)
{
  mo_window *win = current_win;
  FILE *fp;
  long pos;
  char namestr[1024],tmp[1024];

  if (do_post) {
	if (!subject || !*subject) {
		char str[BUFSIZ];

		sprintf(str,"Form Result(s) Posted from %s",pre_title);

		return(mo_post_mailto_form_win(to_address,str));
	}
	else {
		return(mo_post_mailto_form_win(to_address,subject));
	}
  }

  if (!win->mailto_win)
    {
      Widget dialog_frame;
      Widget dialog_sep, buttons_form;
      Widget mailto_form;
      Widget tolabel, sublabel, fromlabel;
      
      /* Create it for the first time. */
      XmxSetUniqid (win->id);
      win->mailto_win = XmxMakeFormDialog 
        (win->base, "NCSA Mosaic: Mail To Author");
      dialog_frame = XmxMakeFrame (win->mailto_win, XmxShadowOut);
      
      /* Constraints for base. */
      XmxSetConstraints 
        (dialog_frame, XmATTACH_FORM, XmATTACH_FORM, 
         XmATTACH_FORM, XmATTACH_FORM, NULL, NULL, NULL, NULL);
      
      /* Main form. */
      mailto_form = XmxMakeForm (dialog_frame);
      
      XmxSetArg (XmNscrolledWindowMarginWidth, 10);
      XmxSetArg (XmNscrolledWindowMarginHeight, 10);
      XmxSetArg (XmNcursorPositionVisible, True);
      XmxSetArg (XmNeditable, True);
      XmxSetArg (XmNeditMode, XmMULTI_LINE_EDIT);
      XmxSetArg (XmNrows, 15);
      XmxSetArg (XmNcolumns, 80);
      /* XmxSetArg (XmNwordWrap, True); */
      /* XmxSetArg (XmNscrollHorizontal, False); */
      win->mailto_text = XmxMakeScrolledText (mailto_form);
      
      dialog_sep = XmxMakeHorizontalSeparator (mailto_form);

      /* create from, to, and subject widgets */
      fromlabel = XmxMakeLabel(mailto_form, "From:");
      XmxSetArg (XmNeditable, False); /* for now, at least */
      win->mailto_fromfield = XmxMakeTextField(mailto_form);

      tolabel = XmxMakeLabel(mailto_form, "To:");
      win->mailto_tofield = XmxMakeTextField(mailto_form);

      sublabel = XmxMakeLabel(mailto_form, "Subject:");
      win->mailto_subfield = XmxMakeTextField(mailto_form);

      /* constraints for FROM */
      XmxSetOffsets(fromlabel, 14, 10, 10, 10);
      XmxSetConstraints
	(fromlabel, XmATTACH_FORM, XmATTACH_NONE, XmATTACH_FORM, 
	 XmATTACH_NONE, NULL, NULL, NULL, NULL);
      XmxSetOffsets(win->mailto_fromfield, 10, 10, 10, 10);
      XmxSetConstraints
	(win->mailto_fromfield, XmATTACH_FORM, XmATTACH_NONE, XmATTACH_WIDGET,
	 XmATTACH_FORM, NULL, NULL, fromlabel, NULL);

      /* constraints for TO */
      XmxSetOffsets(tolabel, 14, 10, 10, 10);
      XmxSetConstraints
	(tolabel, XmATTACH_WIDGET, XmATTACH_NONE, XmATTACH_FORM, XmATTACH_NONE,
	 win->mailto_fromfield, NULL, NULL, NULL);
      XmxSetOffsets(win->mailto_tofield, 10, 10, 10, 10);
      XmxSetConstraints
	(win->mailto_tofield, XmATTACH_WIDGET, XmATTACH_NONE, XmATTACH_WIDGET, 
	 XmATTACH_FORM, win->mailto_fromfield, NULL, tolabel, NULL);

      /* constraints for SUBJECT */
      XmxSetOffsets(sublabel, 14, 10, 10, 10);
      XmxSetConstraints
	(sublabel, XmATTACH_WIDGET, XmATTACH_NONE, XmATTACH_FORM, 
	 XmATTACH_NONE, win->mailto_tofield, NULL, NULL, NULL);
      XmxSetOffsets(win->mailto_subfield, 10, 10, 10, 10);
      XmxSetConstraints
	(win->mailto_subfield, XmATTACH_WIDGET, XmATTACH_NONE, 
	 XmATTACH_WIDGET, XmATTACH_FORM, win->mailto_tofield, NULL, 
	 sublabel, NULL);

      /* create buttons */
      buttons_form = XmxMakeFormAndFiveButtons
        (mailto_form, mailto_win_cb,
         "Send", "Insert File", "Insert URL", "Dismiss", "Help...",
         0, 3, 4, 1, 2);

      XmxSetOffsets (XtParent (win->mailto_text), 3, 0, 3, 3);
      XmxSetConstraints
        (XtParent (win->mailto_text), XmATTACH_WIDGET, XmATTACH_WIDGET, 
         XmATTACH_FORM, XmATTACH_FORM,
         win->mailto_subfield, dialog_sep, NULL, NULL);

      XmxSetArg (XmNtopOffset, 10);
      XmxSetConstraints 
        (dialog_sep, XmATTACH_NONE, XmATTACH_WIDGET, XmATTACH_FORM, 
         XmATTACH_FORM,
         NULL, buttons_form, NULL, NULL);
      XmxSetConstraints 
        (buttons_form, XmATTACH_NONE, XmATTACH_FORM, XmATTACH_FORM, 
	 XmATTACH_FORM, NULL, NULL, NULL, NULL);
    }

  /* fill in text fields */

  sprintf(namestr, "%s <%s>", get_pref_string(eDEFAULT_AUTHOR_NAME),
          get_pref_string(eDEFAULT_AUTHOR_EMAIL));
  
  XmxTextSetString (win->mailto_fromfield, namestr);
  XmxTextSetString (win->mailto_tofield, to_address);
  if (!subject || !*subject) {
	char str[BUFSIZ];

	sprintf(str,"Mail from %s",pre_title);
  	XmTextFieldSetString(win->mailto_subfield,str);
  }
  else {
  	XmTextFieldSetString(win->mailto_subfield,subject);
  }

  XmxTextSetString (win->mailto_text, "");
  
      /* tack signature on the end if it exists - code from Martin Hamilton */
  if (get_pref_string(eSIGNATURE)) {
      XmxTextSetString (win->mailto_text, "\n\n");
          /* leave a gap... */
      XmTextSetInsertionPosition (win->mailto_text, 2);
      if ((fp = fopen(get_pref_string(eSIGNATURE), "r")) != NULL) {
          while(fgets(tmp, sizeof(tmp) - 1, fp)) {
              XmTextInsert(win->mailto_text,
                           pos = XmTextGetInsertionPosition (win->mailto_text),
                           tmp);
              XmTextSetInsertionPosition (win->mailto_text, pos + strlen(tmp));
          }
          fclose(fp);
      } else {
          XmxTextSetString (win->mailto_text, "");
      }
      
  }
  XmTextSetInsertionPosition (win->mailto_text, 0);
      
  XmxManageRemanage (win->mailto_win);

  return mo_succeed;
}


void eatSpace(char *s) {

char *p,*p0;

	for (p=s; *s; s++) {
		if (isspace(*s)) {
			*s=' '; /*Get rid of anything like TAB*/
			p=(++s);
			while (*s && isspace(*s)) s++;
			if (!*s) {
				*p='\0';

				return;
			}
			if (s>p) {
				for (p0=p;*s;s++,p++) *p=(*s);
				*p='\0';
				s=p0;
			}
		}
	}

	return;
}


char *makeReadable(char *str, int condense) {

char *buf=NULL,*name=NULL,*val=NULL;
char *b=NULL;

	b=strdup(str);

	/*decode the encoded info (str) into name-value pairs*/
	buf=(char *)calloc((strlen(b)*3),sizeof(char));
	if (!buf) {
		return(NULL);
	}
	sprintf(buf,"\n");
	for(; (b && *b) ;) {
		val = makeword(b,'&');
		plustospace(val);
		unescape_url(val);
		name = makeword(val,'=');
		if (condense) { /*take out all "multiple isspace()"*/
			eatSpace(val);
		}
		sprintf(buf,"%sNAME=[%s]\nVALUE=[%s]\n\n",(buf && *buf?buf:"\n"),(name && *name?name:"(NULL)"),(val && *val?val:"(NULL)"));
		if (val) {
			free(val);
			val=NULL;
		}
		if (name) {
			free(name);
			name=NULL;
		}
	}

	free(b);

	return(buf);
}


mo_status mo_post_mailto_form_win (char *to_address, char *subject)
{
  mo_window *win = current_win;
  FILE *fp;
  long pos;
  char namestr[1024],tmp[1024],*buf=NULL;

  if (!do_post) {
	return(mo_fail);
  }

  if (!win->mailto_form_win)
    {
      Widget dialog_frame;
      Widget dialog_sep, buttons_form;
      Widget mailto_form_form;
      Widget tolabel, sublabel, fromlabel;
      
      /* Create it for the first time. */
      XmxSetUniqid (win->id);
      win->mailto_form_win = XmxMakeFormDialog 
        (win->base, "NCSA Mosaic: Mail Form Results To Author");
      dialog_frame = XmxMakeFrame (win->mailto_form_win, XmxShadowOut);
      
      /* Constraints for base. */
      XmxSetConstraints 
        (dialog_frame, XmATTACH_FORM, XmATTACH_FORM, 
         XmATTACH_FORM, XmATTACH_FORM, NULL, NULL, NULL, NULL);
      
      /* Main form. */
      mailto_form_form = XmxMakeForm (dialog_frame);
      
      XmxSetArg (XmNscrolledWindowMarginWidth, 10);
      XmxSetArg (XmNscrolledWindowMarginHeight, 10);
      XmxSetArg (XmNcursorPositionVisible, True);
      XmxSetArg (XmNeditable, False);
      XmxSetArg (XmNeditMode, XmMULTI_LINE_EDIT);
      XmxSetArg (XmNrows, 15);
      XmxSetArg (XmNcolumns, 80);
      XmxSetArg (XmNwordWrap, True);
      XmxSetArg (XmNscrollHorizontal, False);
      win->mailto_form_text = XmxMakeScrolledText (mailto_form_form);
      
      dialog_sep = XmxMakeHorizontalSeparator (mailto_form_form);

      /* create from, to, and subject widgets */
      fromlabel = XmxMakeLabel(mailto_form_form, "From:");
      XmxSetArg (XmNeditable, False);
      win->mailto_form_fromfield = XmxMakeTextField(mailto_form_form);

      tolabel = XmxMakeLabel(mailto_form_form, "To:");
      XmxSetArg (XmNeditable, False);
      win->mailto_form_tofield = XmxMakeTextField(mailto_form_form);

      sublabel = XmxMakeLabel(mailto_form_form, "Subject:");
      XmxSetArg (XmNeditable, False);
      win->mailto_form_subfield = XmxMakeTextField(mailto_form_form);

      /* constraints for FROM */
      XmxSetOffsets(fromlabel, 14, 10, 10, 10);
      XmxSetConstraints
	(fromlabel, XmATTACH_FORM, XmATTACH_NONE, XmATTACH_FORM, 
	 XmATTACH_NONE, NULL, NULL, NULL, NULL);
      XmxSetOffsets(win->mailto_form_fromfield, 10, 10, 10, 10);
      XmxSetConstraints
	(win->mailto_form_fromfield, XmATTACH_FORM, XmATTACH_NONE, XmATTACH_WIDGET,
	 XmATTACH_FORM, NULL, NULL, fromlabel, NULL);

      /* constraints for TO */
      XmxSetOffsets(tolabel, 14, 10, 10, 10);
      XmxSetConstraints
	(tolabel, XmATTACH_WIDGET, XmATTACH_NONE, XmATTACH_FORM, XmATTACH_NONE,
	 win->mailto_form_fromfield, NULL, NULL, NULL);
      XmxSetOffsets(win->mailto_form_tofield, 10, 10, 10, 10);
      XmxSetConstraints
	(win->mailto_form_tofield, XmATTACH_WIDGET, XmATTACH_NONE, XmATTACH_WIDGET, 
	 XmATTACH_FORM, win->mailto_form_fromfield, NULL, tolabel, NULL);

      /* constraints for SUBJECT */
      XmxSetOffsets(sublabel, 14, 10, 10, 10);
      XmxSetConstraints
	(sublabel, XmATTACH_WIDGET, XmATTACH_NONE, XmATTACH_FORM, 
	 XmATTACH_NONE, win->mailto_form_tofield, NULL, NULL, NULL);
      XmxSetOffsets(win->mailto_form_subfield, 10, 10, 10, 10);
      XmxSetConstraints
	(win->mailto_form_subfield, XmATTACH_WIDGET, XmATTACH_NONE, 
	 XmATTACH_WIDGET, XmATTACH_FORM, win->mailto_form_tofield, NULL, 
	 sublabel, NULL);

      /* create buttons */
      buttons_form = XmxMakeFormAndThreeButtons
        (mailto_form_form, mailto_form_win_cb,
         "Send", "Dismiss", "Help...",
         0, 1, 2);

      XmxSetOffsets (XtParent (win->mailto_form_text), 3, 0, 3, 3);
      XmxSetConstraints
        (XtParent (win->mailto_form_text), XmATTACH_WIDGET, XmATTACH_WIDGET, 
         XmATTACH_FORM, XmATTACH_FORM,
         win->mailto_form_subfield, dialog_sep, NULL, NULL);

      XmxSetArg (XmNtopOffset, 10);
      XmxSetConstraints 
        (dialog_sep, XmATTACH_NONE, XmATTACH_WIDGET, XmATTACH_FORM, 
         XmATTACH_FORM,
         NULL, buttons_form, NULL, NULL);
      XmxSetConstraints 
        (buttons_form, XmATTACH_NONE, XmATTACH_FORM, XmATTACH_FORM, 
	 XmATTACH_FORM, NULL, NULL, NULL, NULL);
    }

  /* fill in text fields */

  sprintf(namestr, "%s <%s>", get_pref_string(eDEFAULT_AUTHOR_NAME),
          get_pref_string(eDEFAULT_AUTHOR_EMAIL));
  
  XmxTextSetString (win->mailto_form_fromfield, namestr);
  XmxTextSetString (win->mailto_form_tofield, to_address);
  if (subject != NULL)
  	XmTextFieldSetString(win->mailto_form_subfield,subject);
  else
  	XmTextFieldSetString(win->mailto_form_subfield,"");

  win->post_data=strdup(post_data);

  buf=makeReadable(post_data,1);
  XmTextSetString (win->mailto_form_text, buf);
  if (buf) {
	free(buf);
  }

  XmTextSetInsertionPosition (win->mailto_form_text, 0);

  XmxManageRemanage (win->mailto_form_win);

  return mo_succeed;
}


/* SWP -- 11.15.95 -- ACTION=mailto support for Forms */
void do_mailto_post(mo_window *win, char *to, char *from, char *subject, char *body) {

	if (!win || !win->current_node || !win->current_node->url ||
	    !*(win->current_node->url) || !to || !*to || !from || !*from ||
	    !body || !*body || !subject || !*subject) {
		return;
	}

	if (!strcmp(post_content_type,"text/plain")) {

		char *buf=NULL;

		buf=makeReadable(body,0);

#ifndef DISABLE_TRACE
		if (srcTrace) {
			fprintf(stderr,"To: [%s]\nFrom: [%s]\nSubj: [%s]\nBody: [%s]\n",to,from,subject,buf);
		}
#endif

		mo_send_mailto_message(buf, to, subject, post_content_type, 
				       win->current_node->url);

		if (buf) {
			free(buf);
		}
	}
	else {
#ifndef DISABLE_TRACE
		if (srcTrace) {
			fprintf(stderr,"To: [%s]\nFrom: [%s]\nSubj: [%s]\nBody: [%s]\n",to,from,subject,body);
		}
#endif

		mo_send_mailto_message(body, to, subject, post_content_type, 
				       win->current_node->url);
	}

	return;
}


/* ------------------------------------------------------------------------ */
/* these are not currently used.  We just use the functions in techsupport.c */
/* ------------------------------------------------------------------------ */

static FILE *_fp = NULL;

FILE *mo_start_sending_mailto_message (char *to, char *subj, 
                                     char *content_type, char *url)
{
  char cmd[2048];
/*  char *tmp;*/

  if (!to)
    return NULL;
  
  if (get_pref_string(eMAIL_FILTER_COMMAND))
    {
      sprintf (cmd, "%s | %s", get_pref_string(eMAIL_FILTER_COMMAND), 
               get_pref_string(eSENDMAIL_COMMAND));
    }
  else
    {
      sprintf (cmd, "%s", get_pref_string(eSENDMAIL_COMMAND));
    }

  if ((_fp = popen (cmd, "w")) == NULL)
    return NULL;

  fprintf (_fp, "To: %s\n", to);
  fprintf (_fp, "Subject: %s\n", subj);
  fprintf (_fp, "Content-Type: %s\n", content_type);
  fprintf (_fp, "Mime-Version: 1.0\n");
  fprintf (_fp, "X-Mailer: NCSA Mosaic %s on %s\n", 
           MO_VERSION_STRING, MO_MACHINE_TYPE);
  if (url)
    fprintf (_fp, "X-URL: %s\n", url);

  fprintf (_fp, "\n");
  
  /* Stick in BASE tag as appropriate. */
  if (url && content_type && 
      strcmp (content_type, "text/x-html") == 0)
    fprintf (_fp, "<base href=\"%s\">\n", url);

  return _fp;
}

mo_status mo_finish_sending_mailto_message (void)
{
  if (_fp)
    pclose (_fp);

  _fp = NULL;

  return mo_succeed;
}

/* ------------------------------------------------------------------------ */

mo_status mo_send_mailto_message (char *text, char *to, char *subj, 
                                char *content_type, char *url)
{
  FILE *fp;

  fp = mo_start_sending_mailto_message (to, subj, content_type, url);
  if (!fp)
    return mo_fail;
  
  fputs (text, fp);

  mo_finish_sending_mailto_message ();

  return mo_succeed;
}