/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * Mark Spencer <markster@digium.com>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief App to transmit a URL
 *
 * \author Mark Spencer <markster@digium.com>
 * 
 * \ingroup applications
 */
 
#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision$")

#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/app.h"
#include "asterisk/channel.h"

/*** DOCUMENTATION
	<application name="SendURL" language="en_US">
		<synopsis>
			Send a URL.
		</synopsis>
		<syntax>
			<parameter name="URL" required="true" />
			<parameter name="option">
				<optionlist>
					<option name="w">
						<para>Execution will wait for an acknowledgement that the
						URL has been loaded before continuing.</para>
					</option>
				</optionlist>
			</parameter>
		</syntax>
		<description>
			<para>Requests client go to <replaceable>URL</replaceable> (IAX2) or sends the
			URL to the client (other channels).</para>
			<para>Result is returned in the <variable>SENDURLSTATUS</variable> channel variable:</para>
			<variablelist>
				<variable name="SENDURLSTATUS">
					<value name="SUCCESS">
						URL successfully sent to client.
					</value>
					<value name="FAILURE">
						Failed to send URL.
					</value>
					<value name="NOLOAD">
						Client failed to load URL (wait enabled).
					</value>
					<value name="UNSUPPORTED">
						Channel does not support URL transport.
					</value>
				</variable>
			</variablelist>
			<para>SendURL continues normally if the URL was sent correctly or if the channel
			does not support HTML transport.  Otherwise, the channel is hung up.</para>
		</description>
		<see-also>
			<ref type="application">SendImage</ref>
			<ref type="application">SendText</ref>
		</see-also>
	</application>
 ***/

static char *app = "SendURL";

enum {
	OPTION_WAIT = (1 << 0),
} option_flags;

AST_APP_OPTIONS(app_opts,{
	AST_APP_OPTION('w', OPTION_WAIT),
});

static int sendurl_exec(struct ast_channel *chan, void *data)
{
	int res = 0;
	char *tmp;
	struct ast_frame *f;
	char *status = "FAILURE";
	char *opts[0];
	struct ast_flags flags;
	AST_DECLARE_APP_ARGS(args,
		AST_APP_ARG(url);
		AST_APP_ARG(options);
	);
	
	if (ast_strlen_zero(data)) {
		ast_log(LOG_WARNING, "SendURL requires an argument (URL)\n");
		pbx_builtin_setvar_helper(chan, "SENDURLSTATUS", status);
		return -1;
	}

	tmp = ast_strdupa(data);

	AST_STANDARD_APP_ARGS(args, tmp);
	if (args.argc == 2)
		ast_app_parse_options(app_opts, &flags, opts, args.options);
	
	if (!ast_channel_supports_html(chan)) {
		/* Does not support transport */
		pbx_builtin_setvar_helper(chan, "SENDURLSTATUS", "UNSUPPORTED");
		return 0;
	}
	res = ast_channel_sendurl(chan, args.url);
	if (res == -1) {
		pbx_builtin_setvar_helper(chan, "SENDURLSTATUS", "FAILURE");
		return res;
	}
	status = "SUCCESS";
	if (ast_test_flag(&flags, OPTION_WAIT)) {
		for(;;) {
			/* Wait for an event */
			res = ast_waitfor(chan, -1);
			if (res < 0) 
				break;
			f = ast_read(chan);
			if (!f) {
				res = -1;
				status = "FAILURE";
				break;
			}
			if (f->frametype == AST_FRAME_HTML) {
				switch(f->subclass) {
				case AST_HTML_LDCOMPLETE:
					res = 0;
					ast_frfree(f);
					status = "NOLOAD";
					goto out;
					break;
				case AST_HTML_NOSUPPORT:
					/* Does not support transport */
					status = "UNSUPPORTED";
					res = 0;
					ast_frfree(f);
					goto out;
					break;
				default:
					ast_log(LOG_WARNING, "Don't know what to do with HTML subclass %d\n", f->subclass);
				};
			}
			ast_frfree(f);
		}
	} 
out:	
	pbx_builtin_setvar_helper(chan, "SENDURLSTATUS", status);
	return res;
}

static int unload_module(void)
{
	return ast_unregister_application(app);
}

static int load_module(void)
{
	return ast_register_application_xml(app, sendurl_exec);
}

AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Send URL Applications");