/*

 * help.c       -- Help command

 *

 * Copyright (C) 2006-2008 Mikael Berthe <mikael@lilotux.net>

 *

 * 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 <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

#include <glib.h>

#include "settings.h"

#include "logprint.h"

#include "utils.h"

#include "screen.h"

#define DEFAULT_LANG "en"

//  get_lang()

// Return the language code string (a 2-letters string).

static const char *get_lang(void) {

  static const char *lang_str = DEFAULT_LANG;

#ifdef DATA_DIR

  static char lang[3];

  const char *opt_l;

  opt_l = settings_opt_get("lang");

  if (opt_l && strlen(opt_l) == 2 && isalpha(opt_l[0]) && isalpha(opt_l[1])) {

    strncpy(lang, opt_l, sizeof(lang));

    mc_strtolower(lang);

    lang_str = lang;

  }

#endif /* DATA_DIR */

  return lang_str;

}

//  help_process(string)

// Display help about the "string" command.

// If string is null, display general help.

// Return 0 in case of success.

int help_process(char *string)

{

#ifndef DATA_DIR

  scr_LogPrint(LPRINT_NORMAL, "Help isn't available.");

  return -1;

#else

  const char *lang;

  FILE *fp;

  char *helpfiles_dir, *filename;

  char *data;

  const int datasize = 4096;

  int linecount = 0;

  char *p;

  // Check string is ok

  for (p = string; p && *p; p++) {

    if (!isalnum(*p) && *p != '_' && *p != '-') {

      scr_LogPrint(LPRINT_NORMAL, "Cannot find help (invalid keyword).");

      return 1;

    }

  }

  // Look for help file

  lang = get_lang();

  helpfiles_dir = g_strdup_printf("%s/mcabber/help", DATA_DIR);

  if (string && *string) {

    p = g_strdup(string);

    mc_strtolower(p);

    filename = g_strdup_printf("%s/%s/hlp_%s.txt", helpfiles_dir, lang, p);

    g_free(p);

  } else

    filename = g_strdup_printf("%s/%s/hlp.txt", helpfiles_dir, lang);

  fp = fopen(filename, "r");

  g_free(filename);

  g_free(helpfiles_dir);

  if (!fp) {

    scr_LogPrint(LPRINT_NORMAL, "No help found.");

    return -1;

  }

  data = g_new(char, datasize);

  while (!feof(fp)) {

    if (fgets(data, datasize, fp) == NULL) break;

    // Strip trailing newline

    for (p = data; *p; p++) ;

    if (p > data)

      p--;

    if (*p == '\n' || *p == '\r')

      *p = '\0';

    // Displaty the help line

    scr_LogPrint(LPRINT_NORMAL, "%s", data);

    linecount++;

  }

  fclose(fp);

  g_free(data);

  if (linecount) {

    scr_setmsgflag_if_needed(SPECIAL_BUFFER_STATUS_ID, TRUE);

    update_roster = TRUE;

  }

  return 0;

#endif /* DATA_DIR */

}

/* vim: set expandtab cindent cinoptions=>2\:2(0:  For Vim users... */