/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "xchat.h"
#include "xchatc.h"
#include "cfgfiles.h"
#include "fe.h"
#include "tree.h"
#include "url.h"
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif

void *url_tree = NULL;
GTree *url_btree = NULL;


static int
url_free (char *url, void *data)
{
	free (url);
	return TRUE;
}

void
url_clear (void)
{
	tree_foreach (url_tree, (tree_traverse_func *)url_free, NULL);
	tree_destroy (url_tree);
	url_tree = NULL;
	g_tree_destroy (url_btree);
	url_btree = NULL;
}

static int
url_save_cb (char *url, FILE *fd)
{
	fprintf (fd, "%s\n", url);
	return TRUE;
}

void
url_save_tree (const char *fname, const char *mode, gboolean fullpath)
{
	FILE *fd;

	if (fullpath)
		fd = xchat_fopen_file (fname, mode, XOF_FULLPATH);
	else
		fd = xchat_fopen_file (fname, mode, 0);
	if (fd == NULL)
		return;

	tree_foreach (url_tree, (tree_traverse_func *)url_save_cb, fd);
	fclose (fd);
}

static void
url_save_node (char* url)
{
	FILE *fd;

	/* open <config>/url.log in append mode */
	fd = xchat_fopen_file ("url.log", "a", 0);
	if (fd == NULL)
	{
		return;
	}

	fprintf (fd, "%s\n", url);
	fclose (fd);	
}

static int
url_find (char *urltext)
{
	return (g_tree_lookup_extended (url_btree, urltext, NULL, NULL));
}

static void
url_add (char *urltext, int len)
{
	char *data;
	int size;

	/* we don't need any URLs if we have neither URL grabbing nor URL logging enabled */
	if (!prefs.url_grabber && !prefs.url_logging)
	{
		return;
	}

	data = malloc (len + 1);
	if (!data)
	{
		return;
	}
	memcpy (data, urltext, len);
	data[len] = 0;

	if (data[len - 1] == '.')	/* chop trailing dot */
	{
		len--;
		data[len] = 0;
	}
	/* chop trailing ) but only if there's no counterpart */
	if (data[len - 1] == ')' && strchr (data, '(') == NULL)
	{
		data[len - 1] = 0;
	}

	if (prefs.url_logging)
	{
		url_save_node (data);
	}

	/* the URL is saved already, only continue if we need the URL grabber too */
	if (!prefs.url_grabber)
	{
		free (data);
		return;
	}

	if (!url_tree)
	{
		url_tree = tree_new ((tree_cmp_func *)strcasecmp, NULL);
		url_btree = g_tree_new ((GCompareFunc)strcasecmp);
	}

	if (url_find (data))
	{
		free (data);
		return;
	}

	size = tree_size (url_tree);
	/* 0 is unlimited */
	if (prefs.url_grabber_limit > 0 && size >= prefs.url_grabber_limit)
	{
		/* the loop is necessary to handle having the limit lowered while
		   xchat is running */
		size -= prefs.url_grabber_limit;
		for(; size > 0; size--)
		{
			char *pos;

			pos = tree_remove_at_pos (url_tree, 0);
			g_tree_remove (url_btree, pos);
			free (pos);
		}
	}

	tree_append (url_tree, data);
	g_tree_insert (url_btree, data, GINT_TO_POINTER (tree_size (url_tree) - 1));
	fe_url_add (data);
}

/* check if a word is clickable. This is called on mouse motion events, so
   keep it FAST! This new version was found to be almost 3x faster than
   2.4.4 release. */

int
url_check_word (char *word, int len)
{
#define D(x) (x), ((sizeof (x)) - 1)
	static const struct {
		const char *s;
		int len;
	}
	prefix[] = {
		{ D("irc.") },
		{ D("ftp.") },
		{ D("www.") },
		{ D("irc://") },
		{ D("ftp://") },
		{ D("http://") },
		{ D("https://") },
		{ D("file://") },
		{ D("rtsp://") },
		{ D("ut2004://") },
	},
	suffix[] = {
		{ D(".org") },
		{ D(".net") },
		{ D(".com") },
		{ D(".edu") },
		{ D(".html") },
		{ D(".info") },
		{ D(".name") },
		/* Some extra common suffixes.
		foo.blah/baz.php etc should work now, rather than
		needing  http:// at the beginning. */
		{ D(".php") },
		{ D(".htm") },
		{ D(".aero") },
		{ D(".asia") },
		{ D(".biz") },
		{ D(".cat") },
		{ D(".coop") },
		{ D(".int") },
		{ D(".jobs") },
		{ D(".mobi") },
		{ D(".museum") },
		{ D(".pro") },
		{ D(".tel") },
		{ D(".travel") },
		{ D(".xxx") },
		{ D(".asp") },
		{ D(".aspx") },
		{ D(".shtml") },
		{ D(".xml") },
	};
#undef D
	const char *at, *dot;
	int i, dots;

	/* this is pretty much the same as in logmask_is_fullpath() except with length checks and .\ for portable mode */
#ifdef WIN32
	if ((len > 1 && word[0] == '\\') ||
		(len > 2<style>pre { line-height: 125%; }
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span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
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.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
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.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { co