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/* X-Chat
 * Copyright (C) 1998 Peter Zelezny.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>

#ifndef WIN32
#include <unistd.h>
#endif

#include "fe-gtk.h"

#include <gtk/gtkhbox.h>
#include <gtk/gtkvbox.h>
#include <gtk/gtkhbbox.h>
#include <gtk/gtkstock.h>
#include <gtk/gtkliststore.h>
#include <gtk/gtkmessagedialog.h>
#include <gtk/gtktreeview.h>
#include <gtk/gtktreeselection.h>
#include <gtk/gtktogglebutton.h>
#include <gtk/gtkcheckbutton.h>
#include <gtk/gtktable.h>
#include <glib.h>

#include "../common/hexchat.h"
#include "../common/fe.h"
#include "../common/modes.h"
#include "../common/outbound.h"
#include "../common/hexchatc.h"
#include "gtkutil.h"
#include "maingui.h"
#include "banlist.h"

/*
 * These supports_* routines set capable, readable, writable bits */
static void supports_bans (banlist_info *, int);
static void supports_exempt (banlist_info *, int);
static void supports_invite (banlist_info *, int);
static void supports_quiet (banlist_info *, int);

static mode_info modes[MODE_CT] = {
	{
		N_("Bans"),
		N_("Ban"),
		'b',
		RPL_BANLIST,
		RPL_ENDOFBANLIST,
		1<<MODE_BAN,
		supports_bans
	}
	,{
		N_("Exempts"),
		N_("Exempt"),
		'e',
		RPL_EXCEPTLIST,
		RPL_ENDOFEXCEPTLIST,
		1<<MODE_EXEMPT,
		supports_exempt
	}
	,{
		N_("Invites"),
		N_("Invite"),
		'I',
		RPL_INVITELIST,
		RPL_ENDOFINVITELIST,
		1<<MODE_INVITE,
		supports_invite
	}
	,{
		N_("Quiets"),
		N_("Quiet"),
		'q',
		RPL_QUIETLIST,
		RPL_ENDOFQUIETLIST,
		1<<MODE_QUIET,
		supports_quiet
	}
};

/* model for the banlist tree */
enum
{
	TYPE_COLUMN,
	MASK_COLUMN,
	FROM_COLUMN,
	DATE_COLUMN,
	N_COLUMNS
};

static GtkTreeView *
get_view (struct session *sess)
{
	return GTK_TREE_VIEW (sess->res->banlist->treeview);
}

static GtkListStore *
get_store (struct session *sess)
{
	return GTK_LIST_STORE (gtk_tree_view_get_model (get_view (sess)));
}

static void
supports_bans (banlist_info *banl, int i)
{
	int bit = 1<<i;

	banl->capable |= bit;
	banl->readable |= bit;
	banl->writeable |= bit;
	return;
}

static void
supports_exempt (banlist_info *banl, int i)
{
	server *serv = banl->sess->server;
	char *cm = serv->chanmodes;
	int bit = 1<<i;

	if (serv->have_except)
		goto yes;

	if (!cm)
		return;

	while (*cm)
	{
		if (*cm == ',')
			break;
		if (*cm == 'e')
			goto yes;
		cm++;
	}
	return;

yes:
	banl->capable |= bit;
	banl->writeable |= bit;
}

static void
supports_invite (banlist_info *banl, int i)
{
	server *serv = banl->sess->server;
	char *cm = serv->chanmodes;
	int bit = 1<<i;

	if (serv->have_invite)
		goto yes;

	if (!cm)
		return;

	while (*cm)
	{
		if (*cm == ',')
			break;
		if (*cm == 'I')
			goto yes;
		cm++;
	}
	return;

yes:
	banl->capable |= bit;
	banl->writeable |= bit;
}

static void
supports_quiet (banlist_info *banl, int i)
{
	server *serv = banl->sess->server;
	char *cm = serv->chanmodes;
	int bit = 1<<i;

	if (!cm)
		return;

	while (*cm)
	{
		if (*cm == ',')
			break;
		if (*cm == modes[i].letter)
			goto yes;
		cm++;
	}
	return;

yes:
	banl->capable |= bit;
	banl->readable |= bit;
	banl->writeable |= bit;
}

/* fe_add_ban_list() and fe_ban_list_end() return TRUE if consumed, FALSE otherwise */
gboolean
fe_add_ban_list (struct session *sess, char *mask, char *who, char *when, int rplcode)
{
	banlist_info *banl = sess->res->banlist;
	int i;
	GtkListStore *store;
	GtkTreeIter iter;

	if (!banl)
		return FALSE;

	for (i = 0; i < MODE_CT; i++)
		if (modes[i].code == rplcode)
			break;
	if (i == MODE_CT)
	{
		/* printf ("Unexpected value in fe_add_ban_list:  %d\n", rplcode); */
		return FALSE;
	}
	if (banl->pending & 1<<i)
	{
		store = get_store (sess);
		gtk_list_store_append (store, &iter);

		gtk_list_store_set (store, &iter, TYPE_COLUMN, _(modes[i].type), MASK_COLUMN, mask,
						FROM_COLUMN, who, DATE_COLUMN, when, -1);

		banl->line_ct++;
		return TRUE;
	}
	else return FALSE;
}

/* Sensitize checkboxes and buttons as appropriate for the moment  */
static void
banlist_sensitize (banlist_info *banl)
{
	int checkable, i;

	/* CHECKBOXES -- */
	checkable = banl->sess->me->op? banl->writeable: banl->readable;
	for (i = 0; i < MODE_CT; i++)
	{
		if (banl->checkboxes[i] == NULL)
			continue;
		if ((checkable & 1<<i) == 0)
		/* Checkbox is not checkable.  Grey it and uncheck it. */
		{
			gtk_widget_set_sensitive (banl->checkboxes[i], FALSE);
			gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (banl->checkboxes[i]), FALSE);
		}
		else
		/* Checkbox is checkable.  Be sure it's sensitive. */
		{
			gtk_widget_set_sensitive (banl->checkboxes[i], TRUE);
		}
	}

	/* BUTTONS --- */
	if (banl->sess->me->op == 0 || banl->line_ct == 0)
	{
		/* If user is not op or list is empty, buttons should be all greyed */
		gtk_widget_set_sensitive (banl->but_clear, FALSE);
		gtk_widget_set_sensitive (banl->but_crop, FALSE);
		gtk_widget_set_sensitive (banl->but_remove, FALSE);
	}
	else
	{
		/* If no lines are selected, only the CLEAR button should be sensitive */
		if (banl->select_ct == 0)
		{
			gtk_widget_set_sensitive (banl->but_clear, TRUE);
			gtk_widget_set_sensitive (banl->but_crop, FALSE);
			gtk_widget_set_sensitive (banl->but_remove, FALSE);
		}
		/* If any lines are selected, only the REMOVE and CROP buttons should be sensitive */
		else
		{
			gtk_widget_set_sensitive (banl->but_clear, FALSE);
			gtk_widget_set_sensitive (banl->but_crop, TRUE);
			gtk_widget_set_sensitive (banl->but_remove, TRUE);
		}
	}

	/* Set "Refresh" sensitvity */
	gtk_widget_set_sensitive (banl->but_refresh, banl->pending? FALSE: banl->checked? TRUE: FALSE);
}
/* fe_ban_list_end() returns TRUE if consumed, FALSE otherwise */
gboolean
fe_ban_list_end (struct session *sess, int rplcode)
{
	banlist_info *banl = sess->res->banlist;
	int i;

	if (!banl)
		return FALSE;

	for (i = 0; i < MODE_CT; i++)
		if (modes[i].endcode == rplcode)
			break;
	if (i == MODE_CT)
	{
		/* printf ("Unexpected rplcode value in fe_ban_list_end:  %d\n", rplcode); */
		return FALSE;
	}
	if (banl->pending & modes[i].bit)
	{
		banl->pending &= ~modes[i].bit;
		if (!banl->pending)
		{
			gtk_widget_set_sensitive (banl->but_refresh, TRUE);
			banlist_sensitize (banl);
		}
		return TRUE;
	}
	else return FALSE;
}

static void
banlist_select_changed (GtkWidget *item, banlist_info *banl)
{
	GList *list;

	if (banl->line_ct == 0)
		banl->select_ct = 0;
	else
	{
		list = gtk_tree_selection_get_selected_rows (GTK_TREE_SELECTION (item), NULL);
		banl->select_ct = list? 1: 0;
		g_list_foreach (list, (GFunc) gtk_tree_path_free, NULL);
		g_list_free (list);
	}
	banlist_sensitize (banl);
}

/**
 *  * Performs the actual refresh operations.
 *  */
static void
banlist_do_refresh (banlist_info *banl)
{
	session *sess = banl->sess;
	char tbuf[256];
	int i;
	char *tbufp;

	banlist_sensitize (banl);

	if (sess->server->connected)
	{
		GtkListStore *store;

		g_snprintf (tbuf, sizeof tbuf, DISPLAY_NAME": Ban List (%s, %s)",
						sess->channel, sess->server->servername);
		mg_set_title (banl->window, tbuf);

		store = get_store (sess);
		gtk_list_store_clear (store);
		banl->line_ct = 0;
		banl->pending = banl->checked;
		if (banl->pending)
		{
			tbufp = tbuf + g_snprintf (tbuf, sizeof tbuf, "quote mode %s +", sess->channel);
			for (i = 0; i < MODE_CT; i++)
				if (banl->pending & 1<<i)
				{
					*tbufp++ = modes[i].letter;
				}
			*tbufp = 0;
			handle_command (sess, tbuf, FALSE);
		}
	}
	else
	{
		fe_message (_("Not connected."), FE_MSG_ERROR);
	}
}

static void
banlist_refresh (GtkWidget * wid, banlist_info *banl)
{
	/* JG NOTE: Didn't see actual use of wid here, so just forwarding
	   *          * this to chanlist_do_refresh because I use it without any widget
	   *          * param in chanlist_build_gui_list when the user presses enter
	   *          * or apply for the first time if the list has not yet been
	   *          * received.
	   *          */
	banlist_do_refresh (banl);
}

static int
banlist_unban_inner (gpointer none, banlist_info *banl, int mode_num)
{
	session *sess = banl->sess;
	GtkTreeModel *model;
	GtkTreeSelection *sel;
	GtkTreeIter iter;
	char tbuf[2048];
	char **masks, *mask, *type;
	int num_sel, i;


	/* grab the list of selected items */
	model = GTK_TREE_MODEL (get_store (sess));
	sel = gtk_tree_view_get_selection (get_view (sess));

	if (!gtk_tree_model_get_iter_first (model, &iter))
		return 0;

	masks = g_malloc (sizeof (char *) * banl->line_ct);
	num_sel = 0;
	do
	{
		if (gtk_tree_selection_iter_is_selected (sel, &iter))
		{
			/* Get the mask part of this selected line */
			gtk_tree_model_get (model, &iter, TYPE_COLUMN, &type, MASK_COLUMN, &mask, -1);

			/* If it's the wrong type of mask, just continue */
			if (strcmp (_(modes[mode_num].type), type) != 0)
				continue;

			/* Otherwise add it to our array of mask pointers */
			masks[num_sel++] = g_strdup (mask);
			g_free (mask);
			g_free (type);
		}
	}
	while (gtk_tree_model_iter_next (model, &iter));

	/* and send to server */
	if (num_sel)
		send_channel_modes (sess, tbuf, masks, 0, num_sel, '-', modes[mode_num].letter, 0);

	/* now free everything */
	for (i=0; i < num_sel; i++)
		g_free (masks[i]);
	g_free (masks);

	return num_sel;
}

static void
banlist_unban (GtkWidget * wid, banlist_info *banl)
{
	int i, num = 0;

	for (i = 0; i < MODE_CT; i++)
		num += banlist_unban_inner (wid, banl, i);

	/* This really should not occur with the redesign */
	if (num < 1)
	{
		fe_message (_("You must select some bans."), FE_MSG_ERROR);
		return;
	}

	banlist_do_refresh (banl);
}

static void
banlist_clear_cb (GtkDialog *dialog, gint response, gpointer data)
{
	banlist_info *banl = data;
	GtkTreeSelection *sel;

	gtk_widget_destroy (GTK_WIDGET (dialog));

	if (response == GTK_RESPONSE_OK)
	{
		sel = gtk_tree_view_get_selection (get_view (banl->sess));
		gtk_tree_selection_select_all (sel);
		banlist_unban (NULL, banl);
	}
}

static void
banlist_clear (GtkWidget * wid, banlist_info *banl)
{
	GtkWidget *dialog;

	dialog = gtk_message_dialog_new (NULL, 0,
								GTK_MESSAGE_QUESTION, GTK_BUTTONS_OK_CANCEL,
					_("Are you sure you want to remove all listed items in %s?"), banl->sess->channel);

	g_signal_connect (G_OBJECT (dialog), "response",
							G_CALLBACK (banlist_clear_cb), banl);
	gtk_window_set_position (GTK_WINDOW (dialog), GTK_WIN_POS_MOUSE);
	gtk_widget_show (dialog);
}

static void
banlist_add_selected_cb (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data)
{
	GSList **lp = data;
	GSList *list = NULL;
	GtkTreeIter *copy;

	if (!lp) return;
	list = *lp;
	copy = g_malloc (sizeof (GtkTreeIter));
	g_return_if_fail (copy != NULL);
	*copy = *iter;

	list = g_slist_append (list, copy);
	*(GSList **)data = list;
}

static void
banlist_crop (GtkWidget * wid, banlist_info *banl)
{
	session *sess = banl->sess;
	GtkTreeSelection *select;
	GSList *list = NULL, *node;
	int num_sel;

	/* remember which bans are selected */
	select = gtk_tree_view_get_selection (get_view (sess));
	/* gtk_tree_selected_get_selected_rows() isn't present in gtk 2.0.x */
	gtk_tree_selection_selected_foreach (select, banlist_add_selected_cb,
	                                     &list);

	num_sel = g_slist_length (list);
	/* select all, then unselect those that we remembered */
	if (num_sel)
	{
		gtk_tree_selection_select_all (select);

		for (node = list; node; node = node->next)
			gtk_tree_selection_unselect_iter (select, node->data);

		g_slist_foreach (list, (GFunc)g_free, NULL);
		g_slist_free (list);

		banlist_unban (NULL, banl);
	} else
		fe_message (_("You must select some bans."), FE_MSG_ERROR);
}

static void
banlist_toggle (GtkWidget *item, gpointer data)
{
	banlist_info *banl = data;
	int i, bit = 0;

	for (i = 0; i < MODE_CT; i++)
		if (banl->checkboxes[i] == item)
		{
			bit = 1<<i;
			break;
		}

	if (bit)		/* Should be gassert() */
	{
		banl->checked &= ~bit;
		banl->checked |= (GTK_TOGGLE_BUTTON (item)->active)? bit: 0;
		banlist_do_refresh (banl);
	}
}

/* NOTICE:  The official strptime() is not available on all platforms so
 * I've implemented a special version here.  The official version is
 * vastly more general than this:  it uses locales for weekday and month
 * names and its second arg is a format character-string.  This special
 * version depends on the format returned by ctime(3) whose manpage
 * says it returns:
 *     "a null-terminated string of the form "Wed Jun 30 21:49:08 1993\n"
 *
 * If the real strpftime() comes available, use this format string:
 *		#define DATE_FORMAT "%a %b %d %T %Y"
 */
static void
strptime (char *ti, struct tm *tm)
{
	/* Expect something like "Sat Mar 16 21:24:27 2013" */
	static char *mon[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
								  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL };
	int M = -1, d = -1, h = -1, m = -1, s = -1, y = -1;

	if (*ti == 0)
	{
		memset (tm, 0, sizeof *tm);
		return;
	}
	/* No need to supply tm->tm_wday; mktime() doesn't read it */
	ti += 4;
	while ((mon[++M]))
		if (strncmp (ti, mon[M], 3) == 0)
			break;
	ti += 4;

	d = strtol (ti, &ti, 10);
	h = strtol (++ti, &ti, 10);
	m = strtol (++ti, &ti, 10);
	s = strtol (++ti, &ti, 10);
	y = strtol (++ti, NULL, 10) - 1900;

	tm->tm_sec = s;
	tm->tm_min = m;
	tm->tm_hour = h;
	tm->tm_mday = d;
	tm->tm_mon = M;
	tm->tm_year = y;
}

gint
banlist_date_sort (GtkTreeModel *model, GtkTreeIter *a, GtkTreeIter *b, gpointer user_data)
{
	struct tm tm1, tm2;
	time_t t1, t2;
	char *time1, *time2;

	gtk_tree_model_get(model, a, DATE_COLUMN, &time1, -1);
	gtk_tree_model_get(model, b, DATE_COLUMN, &time2, -1);
	strptime (time1, &tm1);
	strptime (time2, &tm2);
	t1 = mktime (&tm1);
	t2 = mktime (&tm2);

	if (t1 < t2) return 1;
	if (t1 == t2) return 0;
	return -1;
}

static GtkWidget *
banlist_treeview_new (GtkWidget *box, banlist_info *banl)
{
	GtkListStore *store;
	GtkWidget *view;
	GtkTreeSelection *select;
	GtkTreeViewColumn *col;
	GtkTreeSortable *sortable;

	store = gtk_list_store_new (N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING,
										 G_TYPE_STRING, G_TYPE_STRING);
	g_return_val_if_fail (store != NULL, NULL);

	sortable = GTK_TREE_SORTABLE (store);
	gtk_tree_sortable_set_sort_func (sortable, DATE_COLUMN, banlist_date_sort, GINT_TO_POINTER (DATE_COLUMN), NULL);

	view = gtkutil_treeview_new (box, GTK_TREE_MODEL (store), NULL,
										  TYPE_COLUMN, _("Type"),
										  MASK_COLUMN, _("Mask"),
										  FROM_COLUMN, _("From"),
										  DATE_COLUMN, _("Date"), -1);

	col = gtk_tree_view_get_column (GTK_TREE_VIEW (view), MASK_COLUMN);
	gtk_tree_view_column_set_alignment (col, 0.5);
	gtk_tree_view_column_set_min_width (col, 100);
	gtk_tree_view_column_set_sort_column_id (col, MASK_COLUMN);
	gtk_tree_view_column_set_sizing (col, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
	gtk_tree_view_column_set_resizable (col, TRUE);

	col = gtk_tree_view_get_column (GTK_TREE_VIEW (view), TYPE_COLUMN);
	gtk_tree_view_column_set_alignment (col, 0.5);
	gtk_tree_view_column_set_sort_column_id (col, TYPE_COLUMN);

	col = gtk_tree_view_get_column (GTK_TREE_VIEW (view), FROM_COLUMN);
	gtk_tree_view_column_set_alignment (col, 0.5);
	gtk_tree_view_column_set_sort_column_id (col, FROM_COLUMN);
	gtk_tree_view_column_set_sizing (col, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
	gtk_tree_view_column_set_resizable (col, TRUE);

	col = gtk_tree_view_get_column (GTK_TREE_VIEW (view), DATE_COLUMN);
	gtk_tree_view_column_set_alignment (col, 0.5);
	gtk_tree_view_column_set_sort_column_id (col, DATE_COLUMN);
	gtk_tree_view_column_set_sizing (col, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
	gtk_tree_view_column_set_resizable (col, TRUE);

	select = gtk_tree_view_get_selection (GTK_TREE_VIEW (view));
	g_signal_connect (G_OBJECT (select), "changed", G_CALLBACK (banlist_select_changed), banl);
	gtk_tree_selection_set_mode (select, GTK_SELECTION_MULTIPLE);

	gtk_widget_show (view);
	return view;
}

static void
banlist_closegui (GtkWidget *wid, banlist_info *banl)
{
	session *sess = banl->sess;

	if (sess->res->banlist == banl)
	{
		g_free (banl);
		sess->res->banlist = NULL;
	}
}

void
banlist_opengui (struct session *sess)
{
	banlist_info *banl;
	int i;
	GtkWidget *table, *vbox, *bbox;
	char tbuf[256];

	if (sess->type != SESS_CHANNEL)
	{
		fe_message (_("You can only open the Ban List window while in a channel tab."), FE_MSG_ERROR);
		return;
	}

	if (!sess->res->banlist)
	{
		sess->res->banlist = g_malloc0 (sizeof (banlist_info));
		if (!sess->res->banlist)
		{
			fe_message (_("Banlist initialization failed."), FE_MSG_ERROR);
			return;
		}
	}
	banl = sess->res->banlist;
	if (banl->window)
	{
		mg_bring_tofront (banl->window);
		return;
	}

	/* New banlist for this session -- Initialize it */
	banl->sess = sess;
	/* For each mode set its bit in capable/readable/writeable */
	for (i = 0; i < MODE_CT; i++)
		modes[i].tester (banl, i);
	/* Force on the checkmark in the "Bans" box */
	banl->checked = 1<<MODE_BAN;

	g_snprintf (tbuf, sizeof tbuf, _(DISPLAY_NAME": Ban List (%s)"),
					sess->server->servername);

	banl->window = mg_create_generic_tab ("BanList", tbuf, FALSE,
					TRUE, banlist_closegui, banl, 550, 200, &vbox, sess->server);
	gtkutil_destroy_on_esc (banl->window);

	gtk_container_set_border_width (GTK_CONTAINER (banl->window), 3);
	gtk_box_set_spacing (GTK_BOX (vbox), 3);

	/* create banlist view */
	banl->treeview = banlist_treeview_new (vbox, banl);

	table = gtk_table_new (1, MODE_CT, FALSE);
	gtk_table_set_col_spacings (GTK_TABLE (table), 16);
	gtk_box_pack_start (GTK_BOX (vbox), table, 0, 0, 0);

	for (i = 0; i < MODE_CT; i++)
	{
		if (!(banl->capable & 1<<i))
			continue;
		banl->checkboxes[i] = gtk_check_button_new_with_label (_(modes[i].name));
		gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (banl->checkboxes[i]), (banl->checked & 1<<i? TRUE: FALSE));
		g_signal_connect (G_OBJECT (banl->checkboxes[i]), "toggled",
								G_CALLBACK (banlist_toggle), banl);
		gtk_table_attach (GTK_TABLE (table), banl->checkboxes[i], i+1, i+2, 0, 1, GTK_FILL, GTK_FILL, 0, 0);
	}

	bbox = gtk_hbutton_box_new ();
	gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), GTK_BUTTONBOX_SPREAD);
	gtk_container_set_border_width (GTK_CONTAINER (bbox), 5);
	gtk_box_pack_end (GTK_BOX (vbox), bbox, 0, 0, 0);
	gtk_widget_show (bbox);

	banl->but_remove = gtkutil_button (bbox, GTK_STOCK_REMOVE, 0, banlist_unban, banl,
	                _("Remove"));
	banl->but_crop = gtkutil_button (bbox, GTK_STOCK_REMOVE, 0, banlist_crop, banl,
	                _("Crop"));
	banl->but_clear = gtkutil_button (bbox, GTK_STOCK_CLEAR, 0, banlist_clear, banl,
	                _("Clear"));

	banl->but_refresh = gtkutil_button (bbox, GTK_STOCK_REFRESH, 0, banlist_refresh, banl, _("Refresh"));

	banlist_do_refresh (banl);

	gtk_widget_show_all (banl->window);
}