/*

 * settings.c   -- Configuration stuff

 * 

 * Copyright (C) 2005 Mikael Berthe <bmikael@lists.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 <strings.h>

#include <stdlib.h>

#include <ctype.h>

#include "settings.h"

static GSList *option;

static GSList *alias;

static GSList *binding;

typedef struct {

  gchar *name;

  gchar *value;

} T_setting;

inline GSList **get_list_ptr(guint type)

{

  if      (type == SETTINGS_TYPE_OPTION)  return &option;

  else if (type == SETTINGS_TYPE_ALIAS)   return &alias;

  else if (type == SETTINGS_TYPE_BINDING) return &binding;

  return NULL;

}

// Return a pointer to the node with the requested key, or NULL if none found

GSList *settings_find(GSList *list, const gchar *key)

{

  GSList *ptr;

  if (!list) return NULL;

  for (ptr = list ; ptr; ptr = g_slist_next(ptr))

    if (!strcasecmp(key, ((T_setting*)ptr->data)->name))

      break;

  return ptr;

}

/* -- */

//  parse_assigment(assignment, pkey, pval)

// Read assignment and split it to key, value

//

// If this is an assignment, the function will return TRUE and

// set *pkey and *pval (*pval is set to NULL if value field is empty).

//

// If this isn't a assignment (no = char), the function will set *pval

// to NULL and return FALSE.

//

// The called should g_free() *pkey and *pval (if not NULL) after use.

guint parse_assigment(gchar *assignment, const gchar **pkey, const gchar **pval)

{

  char *key, *val, *t;

  *pkey = *pval = NULL;

  key = assignment;

  // Remove leading spaces in option name

  while ((!isalnum(*key)) && (*key != '=') && *key) {

    //if (!isblank(*key))

    //  scr_LogPrint("Error in setting parsing!\n");

    key++;

  }

  if (!*key) return FALSE; // Empty assignment

  if (*key == '=') {

    //scr_LogPrint("Cannot parse setting!\n");

    return FALSE;

  }

  // Ok, key points to the option name

  for (val = key+1 ; *val && (*val != '=') ; val++)

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

      // Key should only have alnum chars...

      //scr_LogPrint("Error in setting parsing!\n");

      return FALSE;

    }

  // Remove trailing spaces in option name:

  for (t = val-1 ; t > key && isblank(*t) ; t--)

    ;

  *pkey = g_strndup(key, t+1-key);

  if (!*val) return FALSE; // Not an assignment

  // Remove leading and trailing spaces in option value:

  for (val++; *val && isblank(*val) ; val++) ;

  for (t = val ; *t ; t++) ;

  for (t-- ; t >= val && isblank(*t) ; t--) ;

  *pval = g_strndup(val, t+1-val);

  return TRUE;

}

void settings_set(guint type, const gchar *key, const gchar *value)

{

  GSList **plist;

  GSList *sptr;

  T_setting *setting;

  plist = get_list_ptr(type);

  if (!plist) return;

  sptr = settings_find(*plist, key);

  if (sptr) {

    // The setting has been found.  We will update it or delete it.

    setting = (T_setting*)sptr->data;

    if (setting->value)

      g_free(setting->value);

    if (!value) {

      // Let's remove the setting

      g_free(setting->name);

      *plist = g_slist_delete_link(*plist, sptr);

    } else {

      // Let's update the setting

      setting->value = g_strdup(value);

    }

  } else if (value) {

    setting = g_new(T_setting, 1);

    setting->name  = g_strdup(key);

    setting->value = g_strdup(value);

    *plist = g_slist_append(*plist, setting);

  }

}

void settings_del(guint type, const gchar *key)

{

  settings_set(type, key, NULL);

}

const gchar *settings_get(guint type, const gchar *key)

{

  GSList **plist;

  GSList *sptr;

  T_setting *setting;

  plist = get_list_ptr(type);

  sptr = settings_find(*plist, key);

  if (!sptr) return NULL;

  setting = (T_setting*)sptr->data;

  return setting->value;

}

int settings_get_int(guint type, const gchar *key)

{

  const gchar *setval = settings_get(type, key);

  if (setval) return atoi(setval);

  return 0;

}