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/*
 * Copyright (C) 2007-2014 Tim Mayberry <mojofunk@gmail.com>
 * Copyright (C) 2008-2015 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2009-2011 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2009 David Robillard <d@drobilla.net>
 * Copyright (C) 2013-2014 John Emmas <john@creativepost.co.uk>
 * Copyright (C) 2014-2019 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2017 Ben Loftis <ben@harrisonconsoles.com>
 * Copyright (C) 2017 Johannes Mueller <github@johannes-mueller.org>
 *
 * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <algorithm>
#include <cstring>

#include <glibmm.h>

#include "pbd/file_utils.h"
#include "pbd/stl_delete.h"
#include "pbd/xml++.h"

#include "ardour/template_utils.h"
#include "ardour/directory_names.h"
#include "ardour/filesystem_paths.h"
#include "ardour/filename_extensions.h"
#include "ardour/search_paths.h"
#include "ardour/io.h"

#include "pbd/i18n.h"

using namespace std;
using namespace PBD;

namespace ARDOUR {

std::string
user_template_directory ()
{
	return Glib::build_filename (user_config_directory(), templates_dir_name);
}

std::string
user_route_template_directory ()
{
	return Glib::build_filename (user_config_directory(), route_templates_dir_name);
}

static bool
template_filter (const string &str, void* /*arg*/)
{
	if (!Glib::file_test (str, Glib::FILE_TEST_IS_DIR)) {
		return false;
	}

	return true;
}

static bool
route_template_filter (const string &str, void* /*arg*/)
{
	if (str.find (template_suffix) == str.length() - strlen (template_suffix)) {
		return true;
	}

	return false;
}

string
session_template_dir_to_file (string const & dir)
{
	return Glib::build_filename (dir, Glib::path_get_basename(dir) + template_suffix);
}


void
find_session_templates (vector<TemplateInfo>& template_names, bool read_xml)
{
	vector<string> templates;

	find_paths_matching_filter (templates, template_search_path(), template_filter, 0, true, true);

	if (templates.empty()) {
		cerr << "Found nothing along " << template_search_path().to_string() << endl;
		return;
	}

	for (vector<string>::iterator i = templates.begin(); i != templates.end(); ++i) {
		string file = session_template_dir_to_file (*i);

		TemplateInfo rti;
		rti.name = Glib::path_get_basename (*i);
		rti.path = *i;

		if (read_xml) {

			XMLTree tree;
			if (!tree.read (file.c_str())) {
				cerr << "Failed to parse Route-template XML file: " << file << endl;
				continue;
			}

			XMLNode* root = tree.root();
			
			rti.modified_with = _("(unknown)");
			try {
				XMLNode *pv = root->child("ProgramVersion");
				string modified_with;
				if (pv != 0) {
					pv->get_property (X_("modified-with"), modified_with);
				}
				rti.modified_with = modified_with;
			} catch (XMLException &e) {}

			rti.description = _("No Description");
			try {
				XMLNode *desc = root->child("description");
				if (desc != 0) {
					rti.description = desc->attribute_value();
				}
			} catch (XMLException &e) {}
		}

		template_names.push_back (rti);
	}
	std::sort(template_names.begin(), template_names.end());
}

struct TemplateInfoSorter {
	bool operator () (TemplateInfo const& a, TemplateInfo const& b) {
		return a.name < b.name;
	}
};

void
find_route_templates (vector<TemplateInfo>& template_names)
{
	vector<string> templates;

	find_files_matching_filter (templates, route_template_search_path(), route_template_filter, 0, false, true);

	if (templates.empty()) {
		return;
	}

	for (vector<string>::iterator i = templates.begin(); i != templates.end(); ++i) {
		string fullpath = *i;

		XMLTree tree;

		if (!tree.read (fullpath.c_str())) {
			cerr << "Failed to parse Route-template XML file: " << fullpath << endl;
			continue;
		}

		XMLNode* root = tree.root();

		TemplateInfo rti;

		rti.modified_with = _("(unknown)");
		try {
			XMLNode *pv = root->child("ProgramVersion");
			string modified_with;
			if (pv != 0) {
				pv->get_property (X_("modified-with"), modified_with);
			}
			rti.modified_with = modified_with;
		} catch (XMLException &e) {}

		rti.description = _("No Description");
		try {
			XMLNode *desc = root->child("description");
			if (desc != 0) {
				rti.description = desc->attribute_value();
			}
		} catch (XMLException &e) {}

		rti.name = IO::name_from_state (*root->children().front());
		rti.path = fullpath;

		template_names.push_back (rti);
	}

	std::sort (template_names.begin(), template_names.end (), TemplateInfoSorter ());
}

}