<?php

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *	http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// -- Config ------------------------------------

define('PAGES_DIR', "src/site/pages/");
define('RESOURCES_DIR', "src/site/resources/");
define('TEMPLATES_DIR', "src/site/templates/");
define('TARGET_DIR', "target/site/");
define('POM_PATH', "pom.xml");

// -- Init twig ---------------------------------

require 'Twig/Autoloader.php';
Twig_Autoloader::register();
$loader = new Twig_Loader_Filesystem(array(TEMPLATES_DIR, PAGES_DIR));
$twig = new Twig_Environment($loader);

// -- Work --------------------------------------

// Fetch data from pom.xml
$params = parsePOM();

// Create target dir if needed
if (!file_exists(TARGET_DIR)) {
	echo "Creating target directory\n";
	mkdir(TARGET_DIR, 0777, true);
}

// Render pages
$files = scandir(PAGES_DIR);
foreach($files as $file) 
{
	if (preg_match('/.twig$/', $file)) 
	{
		$filename = str_replace('.twig', '.html', $file);
		$target = TARGET_DIR . $filename;
		echo "Rendering template: $file\n";
		
		$template = $twig->loadTemplate($file);
		$page = $template->render($params);
		file_put_contents($target, $page);
	}
}

// Copy resources
copyDir(RESOURCES_DIR, TARGET_DIR);

echo "Done.\n";


// -- Helpers -----------------------------------

/** Extracts information from pom.xml required for rendering the site. */
function parsePOM()
{
	$project = simplexml_load_file(POM_PATH);
	return array(
		'project' => array(
			'name' => (string) $project->name,
			'url' => (string) $project->url,
			'inceptionYear' => (string) $project->inceptionYear,
		)
	);
}

/** Recursively copies directory contents. */
function copyDir($source, $target)
{
	$source = trim($source, '/');
	$target = trim($target, '/');
	
	$files = scandir($source);
	foreach($files as $file)
	{
		if ($file == '.' || $file == '..') continue;
		
		// Skip hidden files such as .svn
		if ($file[0] == '.') continue;
		
		if (is_dir("$source/$file")) 
		{
			if (!is_dir("$target/$file")) 
			{
				mkdir("$target/$file");
			}
			copyDir("$source/$file", "$target/$file");
		}
		else
		{
			echo "Copying resource: $target/$file\n";
			copy("$source/$file", "$target/$file");
		}
	}
}