/*

 * commands.c     -- user commands handling

 * 

 * 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 <string.h>

#include "commands.h"

#include "jabglue.h"

#include "roster.h"

#include "screen.h"

#include "compl.h"

#include "hooks.h"

#include "hbuf.h"

#include "utf8.h"

#include "utils.h"

#include "settings.h"

// Commands callbacks

static void do_roster(char *arg);

static void do_status(char *arg);

static void do_add(char *arg);

static void do_del(char *arg);

static void do_group(char *arg);

static void do_say(char *arg);

static void do_msay(char *arg);

static void do_buffer(char *arg);

static void do_clear(char *arg);

static void do_info(char *arg);

static void do_rename(char *arg);

static void do_move(char *arg);

static void do_set(char *arg);

static void do_alias(char *arg);

static void do_bind(char *arg);

static void do_connect(char *arg);

static void do_disconnect(char *arg);

// Global variable for the commands list

static GSList *Commands;

//  cmd_add()

// Adds a command to the commands list and to the CMD completion list

void cmd_add(const char *name, const char *help,

        guint flags_row1, guint flags_row2, void (*f)())

{

  cmd *n_cmd = g_new0(cmd, 1);

  strncpy(n_cmd->name, name, 32-1);

  n_cmd->help = help;

  n_cmd->completion_flags[0] = flags_row1;

  n_cmd->completion_flags[1] = flags_row2;

  n_cmd->func = f;

  Commands = g_slist_append(Commands, n_cmd);

  // Add to completion CMD category

  compl_add_category_word(COMPL_CMD, name);

}

//  cmd_init()

// ...

void cmd_init(void)

{

  cmd_add("add", "Add a jabber user", COMPL_JID, 0, &do_add);

  cmd_add("alias", "Add an alias", 0, 0, &do_alias);

  cmd_add("bind", "Add an key binding", 0, 0, &do_bind);

  cmd_add("buffer", "Manipulate current buddy's buffer (chat window)",

          COMPL_BUFFER, 0, &do_buffer);

  cmd_add("clear", "Clear the dialog window", 0, 0, &do_clear);

  cmd_add("connect", "Connect to the server", 0, 0, &do_connect);

  cmd_add("del", "Delete the current buddy", 0, 0, &do_del);

  cmd_add("disconnect", "Disconnect from server", 0, 0, &do_disconnect);

  cmd_add("group", "Change group display settings", COMPL_GROUP, 0, &do_group);

  //cmd_add("help", "Display some help", COMPL_CMD, 0, NULL);

  cmd_add("info", "Show basic infos on current buddy", 0, 0, &do_info);

  cmd_add("move", "Move the current buddy to another group", COMPL_GROUPNAME,

          0, &do_move);

  cmd_add("msay", "Send a multi-lines message to the selected buddy",

          COMPL_MULTILINE, 0, &do_msay);

  //cmd_add("nick");

  cmd_add("quit", "Exit the software", 0, 0, NULL);

  cmd_add("rename", "Rename the current buddy", 0, 0, &do_rename);

  //cmd_add("request_auth");

  cmd_add("roster", "Manipulate the roster/buddylist", COMPL_ROSTER, 0,

          &do_roster);

  cmd_add("say", "Say something to the selected buddy", 0, 0, &do_say);

  //cmd_add("search");

  //cmd_add("send_auth");

  cmd_add("set", "Set/query an option value", 0, 0, &do_set);

  cmd_add("status", "Show or set your status", COMPL_STATUS, 0, &do_status);

  // Status category

  compl_add_category_word(COMPL_STATUS, "online");

  compl_add_category_word(COMPL_STATUS, "avail");

  compl_add_category_word(COMPL_STATUS, "invisible");

  compl_add_category_word(COMPL_STATUS, "free");

  compl_add_category_word(COMPL_STATUS, "dnd");

  compl_add_category_word(COMPL_STATUS, "notavail");

  compl_add_category_word(COMPL_STATUS, "away");

  // Roster category

  compl_add_category_word(COMPL_ROSTER, "bottom");

  compl_add_category_word(COMPL_ROSTER, "top");

  compl_add_category_word(COMPL_ROSTER, "hide_offline");

  compl_add_category_word(COMPL_ROSTER, "show_offline");

  compl_add_category_word(COMPL_ROSTER, "toggle_offline");

  compl_add_category_word(COMPL_ROSTER, "alternate");

  compl_add_category_word(COMPL_ROSTER, "search");

  compl_add_category_word(COMPL_ROSTER, "unread_first");

  compl_add_category_word(COMPL_ROSTER, "unread_next");

  // Roster category

  compl_add_category_word(COMPL_BUFFER, "bottom");

  compl_add_category_word(COMPL_BUFFER, "clear");

  compl_add_category_word(COMPL_BUFFER, "top");

  // Group category

  compl_add_category_word(COMPL_GROUP, "fold");

  compl_add_category_word(COMPL_GROUP, "unfold");

  compl_add_category_word(COMPL_GROUP, "toggle");

  // Multi-line (msay) category

  compl_add_category_word(COMPL_MULTILINE, "abort");

  compl_add_category_word(COMPL_MULTILINE, "begin");

  compl_add_category_word(COMPL_MULTILINE, "send");

  compl_add_category_word(COMPL_MULTILINE, "verbatim");

}

//  expandalias(line)

// If there is one, expand the alias in line and returns a new allocated line

// If no alias is found, returns line

// Note : if the returned pointer is different from line, the caller should

//        g_free() the pointer after use

char *expandalias(char *line)

{

  const char *p1, *p2;

  char *word;

  const gchar *value;

  char *newline = line;

  // Ignore leading '/'

  for (p1 = line ; *p1 == '/' ; p1++)

    ;

  // Locate the end of the word

  for (p2 = p1 ; *p2 && (*p2 != ' ') ; p2++)

    ;

  // Extract the word

  word = g_strndup(p1, p2-p1);

  // Look for an alias in the list

  value = settings_get(SETTINGS_TYPE_ALIAS, (const char*)word);

  if (value) {

    // There is an alias to expand

    newline = g_new(char, strlen(value)+strlen(p2)+2);

    *newline = '/';

    strcpy(newline+1, value);

    strcat(newline, p2);

  }

  g_free(word);

  return newline;

}

//  cmd_get

// Finds command in the command list structure.

// Returns a pointer to the cmd entry, or NULL if command not found.

cmd *cmd_get(const char *command)

{

  const char *p1, *p2;

  char *com;

  GSList *sl_com;

  // Ignore leading '/'

  for (p1 = command ; *p1 == '/' ; p1++)

    ;

  // Locate the end of the command

  for (p2 = p1 ; *p2 && (*p2 != ' ') ; p2++)

    ;

  // Copy the clean command

  com = g_strndup(p1, p2-p1);

  // Look for command in the list

  for (sl_com=Commands; sl_com; sl_com = g_slist_next(sl_com)) {

    if (!strcasecmp(com, ((cmd*)sl_com->data)->name))

      break;

  }

  g_free(com);

  if (sl_com)       // Command has been found.

    return (cmd*)sl_com->data;

  return NULL;

}

//  send_message(msg)

// Write the message in the buddy's window and send the message on

// the network.

void send_message(const char *msg)

{

  const char *jid;

  if (!current_buddy) {

    scr_LogPrint("No buddy currently selected.");

    return;

  }

  jid = CURRENT_JID;

  if (!jid) {

    scr_LogPrint("No buddy currently selected.");

    return;

  }

  // local part (UI, logging, etc.)

  hk_message_out(jid, 0, msg);

  // Network part

  jb_send_msg(jid, msg);

}

//  process_command(line)

// Process a command line.

// Return 255 if this is the /quit command, and 0 for the other commands.

int process_command(char *line)

{

  char *p;

  char *xpline;

  cmd *curcmd;

  // Remove trailing spaces:

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

    ;

  for (p-- ; p>line && (*p == ' ') ; p--)

    *p = 0;

  // We do alias expansion here

  if (scr_get_multimode() != 2)

    xpline = expandalias(line);

  else

    xpline = line; // No expansion in verbatim multi-line mode

  // Command "quit"?

  if ((!strncasecmp(xpline, "/quit", 5)) && (scr_get_multimode() != 2) )

    if (!xpline[5] || xpline[5] == ' ')

      return 255;

  // If verbatim multi-line mode, we check if another /msay command is typed

  if ((scr_get_multimode() == 2) && (strncasecmp(xpline, "/msay ", 6))) {

    // It isn't an /msay command

    scr_append_multiline(xpline);

    return 0;

  }

  // Commands handling

  curcmd = cmd_get(xpline);

  if (!curcmd) {

    scr_LogPrint("Unrecognized command, sorry.");

    if (xpline != line) g_free(xpline);

    return 0;

  }

  if (!curcmd->func) {

    scr_LogPrint("Not yet implemented, sorry.");

    if (xpline != line) g_free(xpline);

    return 0;

  }

  // Lets go to the command parameters

  for (p = xpline+1; *p && (*p != ' ') ; p++)

    ;

  // Skip spaces

  while (*p && (*p == ' '))

    p++;

  // Call command-specific function

  (*curcmd->func)(p);

  if (xpline != line) g_free(xpline);

  return 0;

}

//  process_line(line)

// Process a command/message line.

// If this isn't a command, this is a message and it is sent to the

// currently selected buddy.

// Return 255 if the line is the /quit command, or 0.

int process_line(char *line)

{

  if (!*line) { // User only pressed enter

    if (scr_get_multimode()) {

      scr_append_multiline("");

      return 0;

    }

    if (current_buddy) {

      scr_set_chatmode(TRUE);

      buddy_setflags(BUDDATA(current_buddy), ROSTER_FLAG_LOCK, TRUE);

      scr_ShowBuddyWindow();

    }

    return 0;

  }

  if (*line != '/') {

    // This isn't a command

    if (scr_get_multimode())

      scr_append_multiline(line);

    else

      do_say(line);

    return 0;

  }

  /* It is (probably) a command -- except for verbatim multi-line mode */

  return process_command(line);

}

/* Commands callback functions */

static void do_roster(char *arg)

{

  if (!strcasecmp(arg, "top")) {

    scr_RosterTop();

    update_roster = TRUE;

  } else if (!strcasecmp(arg, "bottom")) {

    scr_RosterBottom();

    update_roster = TRUE;

  } else if (!strcasecmp(arg, "hide_offline")) {

    buddylist_set_hide_offline_buddies(TRUE);

    if (current_buddy)

      buddylist_build();

    update_roster = TRUE;

  } else if (!strcasecmp(arg, "show_offline")) {

    buddylist_set_hide_offline_buddies(FALSE);

    buddylist_build();

    update_roster = TRUE;

  } else if (!strcasecmp(arg, "toggle_offline")) {

    buddylist_set_hide_offline_buddies(-1);

    buddylist_build();

    update_roster = TRUE;

  } else if (!strcasecmp(arg, "unread_first")) {

    scr_RosterUnreadMessage(0);

  } else if (!strcasecmp(arg, "unread_next")) {

    scr_RosterUnreadMessage(1);

  } else if (!strcasecmp(arg, "alternate")) {

    scr_RosterJumpAlternate();

  } else if (!strncasecmp(arg, "search", 6)) {

    char *string = arg+6;

    if (*string && (*string != ' ')) {

      scr_LogPrint("Unrecognized parameter!");

      return;

    }

    while (*string == ' ')

      string++;

    if (!*string) {

      scr_LogPrint("What name or jid are you looking for?");

      return;

    }

    scr_RosterSearch(string);

    update_roster = TRUE;

  } else

    scr_LogPrint("Unrecognized parameter!");

}

static void do_status(char *arg)

{

  enum imstatus st;

  int len;

  char *msg;

  if (!arg || (*arg == 0)) {

    scr_LogPrint("Your status is: %c", imstatus2char[jb_getstatus()]);

    return;

  }