<?php

// Change this to your timezone
date_default_timezone_set('Asia/Jakarta');

use \Michelf\MarkdownExtra;
use \Suin\RSSWriter\Feed;
use \Suin\RSSWriter\Channel;
use \Suin\RSSWriter\Item;

// Get blog post path. Unsorted. Mostly used on widget.
function get_post_unsorted() {

    static $_unsorted = array();

    if (empty($_unsorted)) {

        $url = 'cache/index/index-unsorted.txt';
        if(! file_exists($url)) {
            rebuilt_cache('all');
        }
        $_unsorted = unserialize(file_get_contents($url));
    }
    return $_unsorted;
}

// Get blog post with more info about the path. Sorted by filename.
function get_post_sorted() {

    static $_sorted = array();

    if (empty($_sorted)) {
        $url = 'cache/index/index-sorted.txt';
        if(! file_exists($url)) {
            rebuilt_cache('all');
        }
        $_sorted = unserialize(file_get_contents($url));
    }
    return $_sorted;
}

// Get static page path. Unsorted. 
function get_static_pages() {

    static $_page = array();

    if (empty($_page)) {
        $url = 'cache/index/index-page.txt';
        if(! file_exists($url)) {
            rebuilt_cache('all');
        }
        $_page = unserialize(file_get_contents($url));
    }
    return $_page;
}

// Get static page path. Unsorted. 
function get_static_sub_pages($static = null) {

    static $_sub_page = array();

    if (empty($_sub_page)) {
        $url = 'cache/index/index-sub-page.txt';
        if(! file_exists($url)) {
            rebuilt_cache('all');
        }
        $_sub_page = unserialize(file_get_contents($url));
    }
    if($static != null)
    {
        $stringLen = strlen($static);
        return array_filter($_sub_page, function($sub_page)use($static,$stringLen){
            $x = explode("/",$sub_page);
            if($x[count($x)-2] == $static)
            {
                return true;
            }
            return false;
        });
    }
    return $_sub_page;
}

// Get author bio path. Unsorted. 
function get_author_names() {

    static $_author = array();

    if (empty($_author)) {
        $url = 'cache/index/index-author.txt';
        if(! file_exists($url)) {
            rebuilt_cache('all');
        }
        $_author = unserialize(file_get_contents($url));
    }

    return $_author;
}

// Get backup file. 
function get_zip_files() {

    static $_zip = array();

    if (empty($_zip)) {

        // Get the names of all the
        // zip files.

        $_zip = glob('backup/*.zip');
    }

    return $_zip;
}

// usort function. Sort by filename.
function sortfile($a, $b) {
    return $a['filename'] == $b['filename'] ? 0 : ( $a['filename'] < $b['filename'] ) ? 1 : -1;
}

// usort function. Sort by date.
function sortdate($a, $b) {
    return $a->date == $b->date ? 0 : ( $a->date < $b->date ) ? 1 : -1;
}

// Rebuilt cache index
function rebuilt_cache($type) {

    $dir = 'cache/index';
    $posts_cache_sorted = array();
    $posts_cache_unsorted = array();
    $page_cache = array();
    $author_cache = array();

    if (is_dir($dir) === false) {
        mkdir($dir, 0777, true);
    }

    if ($type === 'posts') {
        $posts_cache_unsorted = glob('content/*/blog/*.md', GLOB_NOSORT);
        $string = serialize($posts_cache_unsorted);
        file_put_contents('cache/index/index-unsorted.txt', print_r($string, true));

        $tmp = array();
        $tmp = glob('content/*/blog/*.md', GLOB_NOSORT);

        if (is_array($tmp)) {
            foreach ($tmp as $file) {
                $posts_cache_sorted[] = pathinfo($file);
            }
        }
        usort($posts_cache_sorted, "sortfile");
        $string = serialize($posts_cache_sorted);
        file_put_contents('cache/index/index-sorted.txt', print_r($string, true));
    } elseif ($type === 'page') {

        $page_cache = glob('content/static/*.md', GLOB_NOSORT);
        $string = serialize($page_cache);
        file_put_contents('cache/index/index-page.txt', print_r($string, true));
    } elseif ($type === 'subpage') {

        $page_cache = glob('content/static/*/*.md', GLOB_NOSORT);
        $string = serialize($page_cache);
        file_put_contents('cache/index/index-sub-page.txt', print_r($string, true));
    } elseif ($type === 'author') {

        $author_cache = glob('content/*/author.md', GLOB_NOSORT);
        $string = serialize($author_cache);
        file_put_contents('cache/index/index-author.txt', print_r($string, true));
    } elseif ($type === 'all') {
        rebuilt_cache('posts');
        rebuilt_cache('page');
        rebuilt_cache('subpage');
        rebuilt_cache('author');
    }
}

// Return blog posts. 
function get_posts($posts, $page = 1, $perpage = 0) {

    if (empty($posts)) {
        $posts = get_post_sorted();
    }

    $tmp = array();

    // Extract a specific page with results
    $posts = array_slice($posts, ($page - 1) * $perpage, $perpage);

    foreach ($posts as $index => $v) {

        $post = new stdClass;

        $filepath = $v['dirname'] . '/' . $v['basename'];

        // Extract the date
        $arr = explode('_', $filepath);

        // Replaced string
        $replaced = substr($arr[0], 0, strrpos($arr[0], '/')) . '/';

        // Author string
        $str = explode('/', $replaced);
        $author = $str[count($str) - 3];

        // The post author + author url
        $post->author = $author;
        $post->authorurl = site_url() . 'author/' . $author;

        $dt = str_replace($replaced, '', $arr[0]);
        $t = str_replace('-', '', $dt);
        $time = new DateTime($t);
        $timestamp = $time->format("Y-m-d H:i:s");

        // The post date
        $post->date = strtotime($timestamp);

        // The archive per day
        $post->archive = site_url() . 'archive/' . date('Y-m', $post->date);

        // The post URL
        $post->url = site_url() . date('Y/m', $post->date) . '/' . str_replace('.md', '', $arr[2]);

        $tag = array();
        $url = array();
        $bc = array();

        $t = explode(',', $arr[1]);
        foreach ($t as $tt) {
            $tag[] = array($tt, site_url() . 'tag/' . $tt);
        }

        foreach ($tag as $a) {
            $url[] = '<span><a href="' . $a[1] . '">' . $a[0] . '</a></span>';
            $bc[] = '<span typeof="v:Breadcrumb"><a property="v:title" rel="v:url" href="' . $a[1] . '">' . $a[0] . '</a></span>';
        }

        $post->tag = implode(', ', $url);

        $post->tagb = implode(' » ', $bc);

        $post->file = $filepath;

        // Get the contents and convert it to HTML
        $content = MarkdownExtra::defaultTransform(file_get_contents($filepath));

        // Extract the title and body
        $arr = explode('t-->', $content);
        if (isset($arr[1])) {
            $title = str_replace('<!--t', '', $arr[0]);
            $title = rtrim(ltrim($title, ' '), ' ');
            $post->title = $title;
            $post->body = $arr[1];
        } else {
            $post->title = 'Untitled: ' . date('l jS \of F Y', $post->date);
            $post->body = $arr[0];
        }

        $post->views = get_views($post->file);

        $tmp[] = $post;
    }

    return $tmp;
}

// Find post by year, month and name, previous, and next.
function find_post($year, $month, $name) {

    $posts = get_post_sorted();

    foreach ($posts as $index => $v) {
        $url = $v['basename'];
        if (strpos($url, "$year-$month") !== false && strpos($url, $name . '.md') !== false) {

            // Use the get_posts method to return
            // a properly parsed object

            $ar = get_posts($posts, $index + 1, 1);
            $nx = get_posts($posts, $index, 1);
            $pr = get_posts($posts, $index + 2, 1);

            if ($index == 0) {
                if (isset($pr[0])) {
                    return array(
                        'current' => $ar[0],
                        'prev' => $pr[0]
                    );
                } else {
                    return array(
                        'current' => $ar[0],
                        'prev' => null
                    );
                }
            } elseif (count($posts) == $index + 1) {
                return array(
                    'current' => $ar[0],
                    'next' => $nx[0]
                );
            } else {
                return array(
                    'current' => $ar[0],
                    'next' => $nx[0],
                    'prev' => $pr[0]
                );
            }
        }
    }
}

// Return tag page.
function get_tag($tag, $page, $perpage, $random) {

    $posts = get_post_sorted();

    if ($random === true) {
        shuffle($posts);
    }

    $tmp = array();

    foreach ($posts as $index => $v) {
        $url = $v['filename'];
        $str = explode('_', $url);
        $mtag = explode(',', $str[1]);
        $etag = explode(',', $tag);
        foreach ($mtag as $t) {
            foreach ($etag as $e) {
                $e = trim($e);
                if ($t === $e) {
                    $tmp[] = $v;
                }
            }
        }
    }

    if (empty($tmp)) {
        not_found();
    }

    $tmp = array_unique($tmp, SORT_REGULAR);

    return $tmp = get_posts($tmp, $page, $perpage);
}

// Return archive page.
function get_archive($req, $page, $perpage) {

    $posts = get_post_sorted();

    $tmp = array();

    foreach ($posts as $index => $v) {
        $url = $v['filename'];
        $str = explode('_', $url);
        if (strpos($str[0], "$req") !== false) {
            $tmp[] = $v;
        }
    }

    if (empty($tmp)) {
        not_found();
    }

    return $tmp = get_posts($tmp, $page, $perpage);
}

// Return posts list on profile.
function get_profile($profile, $page, $perpage) {

    $posts = get_post_sorted();

    $tmp = array();

    foreach ($posts as $index => $v) {
        $url = $v['dirname'];
        $str = explode('/', $url);
        $author = $str[count($str) - 2];
        if ($profile === $author) {
            $tmp[] = $v;
        }
    }

    if (empty($tmp)) {
        return;
    }

    return $tmp = get_posts($tmp, $page, $perpage);
}

// Return author bio.
function get_bio($author) {

    $names = get_author_names();

    $username = 'config/users/' . $author . '.ini';

    $tmp = array();

    if (!empty($names)) {

        foreach ($names as $index => $v) {
            $post = new stdClass;

            // Replaced string
            $replaced = substr($v, 0, strrpos($v, '/')) . '/';

            // Author string
            $str = explode('/', $replaced);
            $profile = $str[count($str) - 2];

            if ($author === $profile) {
                // Profile URL
                $url = str_replace($replaced, '', $v);
                $post->url = site_url() . 'author/' . $profile;

                // Get the contents and convert it to HTML
                $content = MarkdownExtra::defaultTransform(file_get_contents($v));

                // Extract the title and body
                $arr = explode('t-->', $content);
                if (isset($arr[1])) {
                    $title = str_replace('<!--t', '', $arr[0]);
                    $title = rtrim(ltrim($title, ' '), ' ');
                    $post->title = $title;
                    $post->body = $arr[1];
                } else {
                    $post->title = $author;
                    $post->body = $arr[0];
                }

                $tmp[] = $post;
            }
        }
    }

    if (!empty($tmp) || file_exists($username)) {
        return $tmp;
    } else {
        not_found();
    }
}

function default_profile($author) {

    $tmp = array();
    $profile = new stdClass;

    $profile->title = $author;
    $profile->body = '<p>Just another HTMLy user.</p>';

    return $tmp[] = $profile;
}

// Return static page.
function get_static_post($static) {

    $posts = get_static_pages();

    $tmp = array();

    if (!empty($posts)) {

        foreach ($posts as $index => $v) {
            if (strpos($v, $static . '.md') !== false) {

                $post = new stdClass;

                // Replaced string
                $replaced = substr($v, 0, strrpos($v, '/')) . '/';

                // The static page URL
                $url = str_replace($replaced, '', $v);
                $post->url = site_url() . str_replace('.md', '', $url);

                $post->file = $v;

                // Get the contents and convert it to HTML
                $content = MarkdownExtra::defaultTransform(file_get_contents($v));

                // Extract the title and body
                $arr = explode('t-->', $content);
                if (isset($arr[1])) {
                    $title = str_replace('<!--t', '', $arr[0]);
                    $title = rtrim(ltrim($title, ' '), ' ');
                    $post->title = $title;
                    $post->body = $arr[1];
                } else {
                    $post->title = $static;
                    $post->body = $arr[0];
                }
                
                $post->views = get_views($post->file);

                $tmp[] = $post;
            }
        }
    }

    return $tmp;
}
// Return static page.
function get_static_sub_post($static,$sub_static) {

    $posts = get_static_sub_pages($static);
    
    $tmp = array();

    if (!empty($posts)) {

        foreach ($posts as $index => $v) {
            if (strpos($v, $sub_static . '.md') !== false) {

                $post = new stdClass;

                // Replaced string
                $replaced = substr($v, 0, strrpos($v, '/')) . '/';

                // The static page URL
                $url = str_replace($replaced, '', $v);
                $post->url = site_url() . $static . "/" . str_replace('.md', '', $url);

                $post->file = $v;

                // Get the contents and convert it to HTML
                $content = MarkdownExtra::defaultTransform(file_get_contents($v));

                // Extract the title and body
                $arr = explode('t-->', $content);
                if (isset($arr[1])) {
                    $title = str_replace('<!--t', '', $arr[0]);
                    $title = rtrim(ltrim($title, ' '), ' ');
                    $post->title = $title;
                    $post->body = $arr[1];
                } else {
                    $post->title = $sub_static;
                    $post->body = $arr[0];
                }
                
                $post->views = get_views($post->file);

                $tmp[] = $post;
            }
        }
    }

    return $tmp;
}

// Return search page.
function get_keyword($keyword, $page, $perpage) {

    $posts = get_post_sorted();

    $tmp = array();

    $words = explode(' ', $keyword);

    foreach ($posts as $index => $v) {
        $arr = explode('_', $v['filename']);
        $filter = $arr[1] . ' ' . $arr[2];
        foreach ($words as $word) {
            if (stripos($filter, $word) !== false) {
                $tmp[] = $v;
            }
        }
    }

    if (empty($tmp)) {
        // a non-existing page
        render('404-search', null, false);
        die;
    }

    return $tmp = get_posts($tmp, $page, $perpage);
}

// Get related posts base on post tag.
function get_related($tag) {
    $perpage = config('related.count');
    $posts = get_tag(strip_tags($tag), 1, $perpage + 1, true);
    $tmp = array();
    $req = urldecode($_SERVER['REQUEST_URI']);

    foreach ($posts as $post) {
        $url = $post->url;
        if (strpos($url, $req) === false) {
            $tmp[] = $post;
        }
    }

    $total = count($tmp);

    if ($total >= 1) {

        $i = 1;
        echo '<div class="related"><h4>Related posts</h4><ul>';
        foreach ($tmp as $post) {
            echo '<li><a href="' . $post->url . '">' . $post->title . '</a></li>';
            if ($i++ >= $perpage)
                break;
        }
        echo '</ul></div>';
    }
}

// Return post count. Matching $var and $str provided.
function get_count($var, $str) {

    $posts = get_post_sorted();

    $tmp = array();

    foreach ($posts as $index => $v) {
        $url = $v[$str];
        if (strpos($url, "$var") !== false) {
            $tmp[] = $v;
        }
    }

    return count($tmp);
}

// Return seaarch result count
function keyword_count($keyword) {

    $posts = get_post_sorted();

    $tmp = array();

    $words = explode(' ', $keyword);

    foreach ($posts as $index => $v) {
        $arr = explode('_', $v['filename']);
        $filter = $arr[1] . ' ' . $arr[2];
        foreach ($words as $word) {
            if (strpos($filter, strtolower($word)) !== false) {
                $tmp[] = $v;
            }
        }
    }

    $tmp = array_unique($tmp, SORT_REGULAR);

    return count($tmp);
}

// Return an archive list, categorized by year and month.
function archive_list() {

    $posts = get_post_unsorted();
    $by_year = array();
    $col = array();

    if (!empty($posts)) {

        foreach ($posts as $index => $v) {

            $arr = explode('_', $v);

            // Replaced string
            $str = $arr[0];
            $replaced = substr($str, 0, strrpos($str, '/')) . '/';

            $date = str_replace($replaced, '', $arr[0]);
            $data = explode('-', $date);
            $col[] = $data;
        }

        foreach ($col as $row) {

            $y = $row['0'];
            $m = $row['1'];
            $by_year[$y][] = $m;
        }

        # Most recent year first
        krsort($by_year);
        # Iterate for display
        $script = <<<EOF
	if (this.parentNode.className.indexOf('expanded') > -1){this.parentNode.className = 'collapsed';this.innerHTML = '&#9658;';} else {this.parentNode.className = 'expanded';this.innerHTML = '&#9660;';}
EOF;
        echo <<<EOF
		<style>ul.archivegroup{padding:0;margin:0;}.archivegroup .expanded ul{display:block;}.archivegroup .collapsed ul{display:none;}.archivegroup li.expanded,.archivegroup li.collapsed{list-style:none;}
		</style>
EOF;
        echo '<h3>Archive</h3>';
        $i = 0;
        $len = count($by_year);
        foreach ($by_year as $year => $months) {
            if ($i == 0) {
                $class = 'expanded';
                $arrow = '&#9660;';
            } else {
                $class = 'collapsed';
                $arrow = '&#9658;';
            }
            $i++;

            echo '<ul class="archivegroup">';
            echo '<li class="' . $class . '">';
            echo '<a href="javascript:void(0)" class="toggle" onclick="' . $script . '">' . $arrow . '</a> ';
            echo '<a href="' . site_url() . 'archive/' . $year . '">' . $year . '</a> ';
            echo '<span class="count">(' . count($months) . ')</span>';
            echo '<ul class="month">';

            $by_month = array_count_values($months);
            # Sort the months
            krsort($by_month);
            foreach ($by_month as $month => $count) {
                $name = date('F', mktime(0, 0, 0, $month, 1, 2010));
                echo '<li class="item"><a href="' . site_url() . 'archive/' . $year . '-' . $month . '">' . $name . '</a>';
                echo ' <span class="count">(' . $count . ')</span></li>';
            }

            echo '</ul>';
            echo '</li>';
            echo '</ul>';
        }
    }
}

// Return tag cloud.
function tag_cloud() {

    $posts = get_post_unsorted();
    $tags = array();

    if (!empty($posts)) {

        foreach ($posts as $index => $v) {

            $arr = explode('_', $v);

            $data = $arr[1];
            $mtag = explode(',', $data);
            foreach ($mtag as $etag) {
                $tags[] = $etag;
            }
        }

        $tag_collection = array_count_values($tags);
        ksort($tag_collection);

        echo '<h3>Tags</h3>';
        echo '<ul class="taglist">';
        foreach ($tag_collection as $tag => $count) {
            echo '<li class="item"><a href="' . site_url() . 'tag/' . $tag . '">' . $tag . '</a> <span class="count">(' . $count . ')</span></li>';
        }
        echo '</ul>';
    }
}

// Helper function to determine whether
// to show the previous buttons
function has_prev($prev) {
    if (!empty($prev)) {
        return array(
            'url' => $prev->url,
            'title' => $prev->title
        );
    }
}

// Helper function to determine whether
// to show the next buttons
function has_next($next) {
    if (!empty($next)) {
        return array(
            'url' => $next->url,
            'title' => $next->title
        );
    }
}

// Helper function to determine whether
// to show the pagination buttons
function has_pagination($total, $perpage, $page = 1) {
    if (!$total) {
        $total = count(get_post_unsorted());
    }
    return array(
        'prev' => $page > 1,
        'next' => $total > $page * $perpage
    );
}

// Get the meta description
function get_description($string) {

    $string = remove_accent($string);
    $string = preg_replace('/[^A-Za-z0-9 !@#$%^&*(),.-]/u', ' ', strip_tags($string));
    $string = ltrim($string);
    $string = substr($string, 0, config('description.char'));
    return $string = substr($string, 0, strrpos($string, ' '));
}

// Get the teaser
function get_teaser($text, $url) {

    $teaserType = config('teaser.type');

    if (strlen(strip_tags($text)) < config('teaser.char') || $teaserType === 'full') {
        echo $text;
    } else {
        $string = preg_replace('/\s\s+/', ' ', strip_tags($text));
        $string = substr($string, 0, config('teaser.char'));
        $string = substr($string, 0, strrpos($string, ' '));
        $body = $string . '...' . ' <a class="readmore" href="' . $url . '#more">more</a>';
        echo '<p>' . $body . '</p>';
    }
}

// Get thumbnail from image and Youtube.
function get_thumbnail($text) {

    if (config('img.thumbnail') == 'true') {

        $teaserType = config('teaser.type');

        if (strlen(strip_tags($text)) > config('teaser.char') && $teaserType === 'trimmed') {

            libxml_use_internal_errors(true);
            $default = config('default.thumbnail');
            $dom = new DOMDocument();
            $dom->loadHtml($text);
            $imgTags = $dom->getElementsByTagName('img');
            $vidTags = $dom->getElementsByTagName('iframe');
            if ($imgTags->length > 0) {
                $imgElement = $imgTags->item(0);
                $imgSource = $imgElement->getAttribute('src');
                return '<div class="thumbnail" style="background-image:url(' . $imgSource . ');"></div>';
            } elseif ($vidTags->length > 0) {
                $vidElement = $vidTags->item(0);
                $vidSource = $vidElement->getAttribute('src');
                $fetch = explode("embed/", $vidSource);
                if (isset($fetch[1])) {
                    $vidThumb = '//img.youtube.com/vi/' . $fetch[1] . '/default.jpg';
                    return '<div class="thumbnail" style="background-image:url(' . $vidThumb . ');"></div>';
                }
            } else {
                if (!empty($default)) {
                    return '<div class="thumbnail" style="background-image:url(' . $default . ');"></div>';
                }
            }
        } else {
            
        }
    }
}

// Return edit tab on post
function tab($p) {
    $user = $_SESSION[config("site.url")]['user'];
    $role = user('role', $user);
    if (isset($p->author)) {
        if ($user === $p->author || $role === 'admin') {
            echo '<div class="tab"><a href="' . $p->url . '">View</a><a href="' . $p->url . '/edit?destination=post">Edit</a></div>';
        }
    } else {
        echo '<div class="tab"><a href="' . $p->url . '">View</a><a href="' . $p->url . '/edit?destination=post">Edit</a></div>';
    }
}

// Use base64 encode image to speed up page load time.
function base64_encode_image($filename = string, $filetype = string) {
    if ($filename) {
        $imgbinary = fread(fopen($filename, "r"), filesize($filename));
        return 'data:image/' . $filetype . ';base64,' . base64_encode($imgbinary);
    }
}

// Social links
function social() {

    $twitter = config('social.twitter');
    $facebook = config('social.facebook');
    $google = config('social.google');
    $tumblr = config('social.tumblr');
    $rss = site_url() . 'feed/rss';

    if (!empty($twitter)) {
        echo '<a href="' . $twitter . '" target="_blank"><img src="' . site_url() . 'themes/default/img/twitter.png" width="32" height="32" alt="Twitter"/></a>';
    }

    if (!empty($facebook)) {
        echo '<a href="' . $facebook . '" target="_blank"><img src="' . site_url() . 'themes/default/img/facebook.png" width="32" height="32" alt="Facebook"/></a>';
    }

    if (!empty($google)) {
        echo '<a href="' . $google . '" target="_blank"><img src="' . site_url() . 'themes/default/img/googleplus.png" width="32" height="32" alt="Google+"/></a>';
    }

    if (!empty($tumblr)) {
        echo '<a href="' . $tumblr . '" target="_blank"><img src="' . site_url() . 'themes/default/img/tumblr.png" width="32" height="32" alt="Tumblr"/></a>';
    }

    echo '<a href="' . site_url() . 'feed/rss" target="_blank"><img src="' . site_url() . 'themes/default/img/rss.png" width="32" height="32" alt="RSS Feed"/></a>';
}

// Copyright
function copyright() {

    $blogcp = blog_copyright();
    $credit = 'Proudly powered by <a href="http://www.htmly.com" target="_blank">HTMLy</a>.';

    if (!empty($blogcp)) {
        return $copyright = '<p>' . $blogcp . '</p><p>' . $credit . '</p>';
    } else {
        return $credit = '<p>' . $credit . '</p>';
    }
}

// Disqus on post.
function disqus($title = null, $url = null) {
    $comment = config('comment.system');
    $disqus = config('disqus.shortname');
    $script = <<<EOF
	<script type="text/javascript">
		var disqus_shortname = '{$disqus}';
		var disqus_title = '{$title}';
		var disqus_url = '{$url}';
		(function() {
			var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
			dsq.src = '//' + disqus_shortname + '.disqus.com/embed.js';
			(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
		})();
	</script>
EOF;
    if (!empty($disqus) && $comment == 'disqus') {
        return $script;
    }
}

// Disqus comment count on teaser
function disqus_count() {
    $comment = config('comment.system');
    $disqus = config('disqus.shortname');
    $script = <<<EOF
	<script type="text/javascript">
		var disqus_shortname = '{$disqus}';
		(function() {
			var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
			dsq.src = '//' + disqus_shortname + '.disqus.com/count.js';
			(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
		})();
	</script>
EOF;
    if (!empty($disqus) && $comment == 'disqus') {
        return $script;
    }
}

// Disqus recent comments
function recent_comments() {
    $comment = config('comment.system');
    $disqus = config('disqus.shortname');
    $script = <<<EOF
		<script type="text/javascript">
			var heading ='<h3>Comments</h3>';
			document.write(heading);
		</script>
		<script type="text/javascript" src="//{$disqus}.disqus.com/recent_comments_widget.js?num_items=5&hide_avatars=0&avatar_size=48&excerpt_length=200&hide_mods=0"></script>
		<style>li.dsq-widget-item {border-bottom: 1px solid #ebebeb;margin:0;margin-bottom:10px;padding:0;padding-bottom:10px;}a.dsq-widget-user {font-weight:normal;}img.dsq-widget-avatar {margin-right:10px; }.dsq-widget-comment {display:block;padding-top:5px;}.dsq-widget-comment p {display:block;margin:0;}p.dsq-widget-meta {padding-top:5px;margin:0;}#dsq-combo-widget.grey #dsq-combo-content .dsq-combo-box {background: transparent;}#dsq-combo-widget.grey #dsq-combo-tabs li {background: none repeat scroll 0 0 #DDDDDD;}</style>
EOF;
    if (!empty($disqus) && $comment == 'disqus') {
        return $script;
    }
}

function facebook() {
    $comment = config('comment.system');
    $appid = config('fb.appid');
    $script = <<<EOF
	<div id="fb-root"></div>
	<script>(function(d, s, id) {
	  var js, fjs = d.getElementsByTagName(s)[0];
	  if (d.getElementById(id)) return;
	  js = d.createElement(s); js.id = id;
	  js.src = "//connect.facebook.net/en_US/all.js#xfbml=1&appId={$appid}";
	  fjs.parentNode.insertBefore(js, fjs);
	}(document, 'script', 'facebook-jssdk'));</script>
	<style>.fb-comments, .fb_iframe_widget span, .fb-comments iframe {width: 100%!important;}</style>
EOF;

    if (!empty($appid) && $comment == 'facebook') {
        return $script;
    }
}

// Google Publisher (Google+ page).
function publisher() {
    $publisher = config('google.publisher');
    if (!empty($publisher)) {
        return $publisher;
    }
}

// Google Analytics
function analytics() {
    $analytics = config('google.analytics.id');
    $script = <<<EOF
	<script type="text/javascript">
		var _gaq = _gaq || [];
		_gaq.push(['_setAccount', '{$analytics}']);
		_gaq.push(['_trackPageview']);
		(function() {
			var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
			ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
			var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
		})();
	</script>
EOF;
    if (!empty($analytics)) {
        return $script;
    }
}

// Menu
function menu() {
    $menu = config('blog.menu');
    $req = $_SERVER['REQUEST_URI'];

    if (!empty($menu)) {

        $links = explode('|', $menu);

        echo '<ul class="nav">';

        $i = 0;
        $len = count($links);

        foreach ($links as $link) {

            if ($i == 0) {
                $class = 'item first';
            } elseif ($i == $len - 1) {
                $class = 'item last';
            } else {
                $class = 'item';
            }

            $i++;

            $anc = explode('->', $link);

            if (isset($anc[0]) && isset($anc[1])) {

                if (strpos(rtrim($anc[1], '/') . '/', site_url()) !== false) {
                    $id = substr($link, strrpos($link, '/') + 1);
                    $file = 'content/static/' . $id . '.md';
                    if (file_exists($file)) {
                        if (strpos($req, $id) !== false) {
                            echo '<li class="' . $class . ' active"><a href="' . $anc[1] . '">' . $anc[0] . '</a></li>';
                        } else {
                            echo '<li class="' . $class . '"><a href="' . $anc[1] . '">' . $anc[0] . '</a></li>';
                        }
                    } else {
                        if (rtrim($anc[1], '/') . '/' == site_url()) {
                            if ($req == site_path() . '/') {
                                echo '<li class="' . $class . ' active"><a href="' . site_url() . '">' . config('breadcrumb.home') . '</a></li>';
                            } else {
                                echo '<li class="' . $class . '"><a href="' . site_url() . '">' . config('breadcrumb.home') . '</a></li>';
                            }
                        }
                    }
                } else {
                    echo '<li class="' . $class . '"><a target="_blank" href="' . $anc[1] . '">' . $anc[0] . '</a></li>';
                }
            }
        }

        echo '</ul>';
    } else {
        get_menu();
    }
}

// Auto generate menu from static page
function get_menu() {

    $posts = get_static_pages();
    $req = $_SERVER['REQUEST_URI'];

    if (!empty($posts)) {

        krsort($posts);

        echo '<ul class="nav">';
        if ($req == site_path() . '/') {
            echo '<li class="item first active"><a href="' . site_url() . '">' . config('breadcrumb.home') . '</a></li>';
        } else {
            echo '<li class="item first"><a href="' . site_url() . '">' . config('breadcrumb.home') . '</a></li>';
        }

        $i = 0;
        $len = count($posts);

        foreach ($posts as $index => $v) {

            if ($i == $len - 1) {
                $class = 'item last';
            } else {
                $class = 'item';
            }
            $i++;

            // Replaced string
            $replaced = substr($v, 0, strrpos($v, '/')) . '/';
            $base = str_replace($replaced, '', $v);
            $url = site_url() . str_replace('.md', '', $base);

            // Get the contents and convert it to HTML
            $content = MarkdownExtra::defaultTransform(file_get_contents($v));

            // Extract the title and body
            $arr = explode('t-->', $content);
            if (isset($arr[1])) {
                $title = str_replace('<!--t', '', $arr[0]);
                $title = rtrim(ltrim($title, ' '), ' ');
            } else {
                $title = str_replace('-', ' ', str_replace('.md', '', $base));
            }

            if (strpos($req, str_replace('.md', '', $base)) !== false) {
                echo '<li class="' . $class . ' active"><a href="' . $url . '">' . ucwords($title) . '</a></li>';
            } else {
                echo '<li class="' . $class . '"><a href="' . $url . '">' . ucwords($title) . '</a></li>';
            }
        }
        echo '</ul>';
    } else {

        echo '<ul class="nav">';
        if ($req == site_path() . '/') {
            echo '<li class="item first active"><a href="' . site_url() . '">' . config('breadcrumb.home') . '</a></li>';
        } else {
            echo '<li class="item first"><a href="' . site_url() . '">' . config('breadcrumb.home') . '</a></li>';
        }
        echo '</ul>';
    }
}

// Search form
function search() {
    echo <<<EOF
	<form id="search-form" method="get">
		<input type="text" class="search-input" name="search" value="Search" onfocus="if (this.value == 'Search') {this.value = '';}" onblur="if (this.value == '') {this.value = 'Search';}">
		<input type="submit" value="Search" class="search-button">
	</form>
EOF;
    if (isset($_GET['search'])) {
        $url = site_url() . 'search/' . $_GET['search'];
        header("Location: $url");
    }
}

// The not found error
function not_found() {
    error(404, render('404', null, false));
}

// Turn an array of posts into an RSS feed
function generate_rss($posts) {

    $feed = new Feed();
    $channel = new Channel();
    $rssLength = config('rss.char');

    $channel
            ->title(blog_title())
            ->description(blog_description())
            ->url(site_url())
            ->appendTo($feed);

    foreach ($posts as $p) {

        if (!empty($rssLength)) {
            if (strlen(strip_tags($p->body)) < config('rss.char')) {
                $string = preg_replace('/\s\s+/', ' ', strip_tags($p->body));
                $body = $string . '...' . ' <a class="readmore" href="' . $p->url . '#more">more</a>';
            } else {
                $string = preg_replace('/\s\s+/', ' ', strip_tags($p->body));
                $string = substr($string, 0, config('rss.char'));
                $string = substr($string, 0, strrpos($string, ' '));
                $body = $string . '...' . ' <a class="readmore" href="' . $p->url . '#more">more</a>';
            }
        } else {
            $body = $p->body;
        }

        $item = new Item();
        $tags = explode(',', str_replace(' ', '', strip_tags($p->tag)));
        foreach ($tags as $tag) {
            $item
                    ->category($tag, site_url() . 'tag/' . $tag);
        }
        $item
                ->title($p->title)
                ->pubDate($p->date)
                ->description($body)
                ->url($p->url)
                ->appendTo($channel);
    }

    echo $feed;
}

// Return post, archive url for sitemap
function get_path() {

    $posts = get_post_sorted();

    $tmp = array();

    foreach ($posts as $index => $v) {

        $post = new stdClass;

        $filepath = $v['dirname'] . '/' . $v['basename'];

        // Extract the date
        $arr = explode('_', $filepath);

        // Replaced string
        $replaced = substr($arr[0], 0, strrpos($arr[0], '/')) . '/';

        // Author string
        $str = explode('/', $replaced);
        $author = $str[count($str) - 3];

        $post->authorurl = site_url() . 'author/' . $author;

        $dt = str_replace($replaced, '', $arr[0]);
        $t = str_replace('-', '', $dt);
        $time = new DateTime($t);
        $timestamp = $time->format("Y-m-d H:i:s");

        // The post date
        $post->date = strtotime($timestamp);

        // The archive per day
        $post->archiveday = site_url() . 'archive/' . date('Y-m-d', $post->date);

        // The archive per day
        $post->archivemonth = site_url() . 'archive/' . date('Y-m', $post->date);

        // The archive per day
        $post->archiveyear = site_url() . 'archive/' . date('Y', $post->date);

        // The post URL
        $post->url = site_url() . date('Y/m', $post->date) . '/' . str_replace('.md', '', $arr[2]);

        $tmp[] = $post;
    }

    return $tmp;
}

// Return static page path for sitemap
function get_static_path() {

    $posts = get_static_pages();

    $tmp = array();

    if (!empty($posts)) {

        foreach ($posts as $index => $v) {

            $post = new stdClass;

            // Replaced string
            $replaced = substr($v, 0, strrpos($v, '/')) . '/';

            // The static page URL
            $url = str_replace($replaced, '', $v);
            $post->url = site_url() . str_replace('.md', '', $url);

            $tmp[] = $post;
        }
    }

    return $tmp;
}

// Generate sitemap.xml.
function generate_sitemap($str) {

    echo '<?xml version="1.0" encoding="UTF-8"?>';

    if ($str == 'index') {

        echo '<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';
        echo '<sitemap><loc>' . site_url() . 'sitemap.base.xml</loc></sitemap>';
        echo '<sitemap><loc>' . site_url() . 'sitemap.post.xml</loc></sitemap>';
        echo '<sitemap><loc>' . site_url() . 'sitemap.static.xml</loc></sitemap>';
        echo '<sitemap><loc>' . site_url() . 'sitemap.tag.xml</loc></sitemap>';
        echo '<sitemap><loc>' . site_url() . 'sitemap.archive.xml</loc></sitemap>';
        echo '<sitemap><loc>' . site_url() . 'sitemap.author.xml</loc></sitemap>';
        echo '</sitemapindex>';
    } elseif ($str == 'base') {

        echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';
        echo '<url><loc>' . site_url() . '</loc><priority>1.0</priority></url>';
        echo '</urlset>';
    } elseif ($str == 'post') {

        $posts = get_path();

        echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';

        foreach ($posts as $p) {
            echo '<url><loc>' . $p->url . '</loc><priority>0.5</priority></url>';
        }

        echo '</urlset>';
    } elseif ($str == 'static') {

        $posts = get_static_path();

        echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';

        if (!empty($posts)) {

            foreach ($posts as $p) {
                echo '<url><loc>' . $p->url . '</loc><priority>0.5</priority></url>';
            }
        }

        echo '</urlset>';
    } elseif ($str == 'tag') {

        $posts = get_post_unsorted();
        $tags = array();

        if (!empty($posts)) {
            foreach ($posts as $index => $v) {

                $arr = explode('_', $v);

                $data = $arr[1];
                $mtag = explode(',', $data);
                foreach ($mtag as $etag) {
                    $tags[] = $etag;
                }
            }

            foreach ($tags as $t) {
                $tag[] = site_url() . 'tag/' . $t;
            }

            echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';

            if (isset($tag)) {

                $tag = array_unique($tag, SORT_REGULAR);

                foreach ($tag as $t) {
                    echo '<url><loc>' . $t . '</loc><priority>0.5</priority></url>';
                }
            }

            echo '</urlset>';
        }
    } elseif ($str == 'archive') {

        $posts = get_path();
        $day = array();
        $month = array();
        $year = array();

        foreach ($posts as $p) {
            $day[] = $p->archiveday;
            $month[] = $p->archivemonth;
            $year[] = $p->archiveyear;
        }

        $day = array_unique($day, SORT_REGULAR);
        $month = array_unique($month, SORT_REGULAR);
        $year = array_unique($year, SORT_REGULAR);

        echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';

        foreach ($day as $d) {
            echo '<url><loc>' . $d . '</loc><priority>0.5</priority></url>';
        }

        foreach ($month as $m) {
            echo '<url><loc>' . $m . '</loc><priority>0.5</priority></url>';
        }

        foreach ($year as $y) {
            echo '<url><loc>' . $y . '</loc><priority>0.5</priority></url>';
        }

        echo '</urlset>';
    } elseif ($str == 'author') {

        $posts = get_path();
        $author = array();

        foreach ($posts as $p) {
            $author[] = $p->authorurl;
        }

        $author = array_unique($author, SORT_REGULAR);

        echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';

        foreach ($author as $a) {
            echo '<url><loc>' . $a . '</loc><priority>0.5</priority></url>';
        }

        echo '</urlset>';
    }
}

// Function to generate OPML file
function generate_opml() {

    $opml_data = array(
        'head' => array(
            'title' => blog_title() . ' OPML File',
            'ownerName' => blog_title(),
            'ownerId' => site_url()
        ),
        'body' => array(
            array(
                'text' => blog_title(),
                'description' => blog_description(),
                'htmlUrl' => site_url(),
                'language' => 'unknown',
                'title' => blog_title(),
                'type' => 'rss',
                'version' => 'RSS2',
                'xmlUrl' => site_url() . 'feed/rss'
            )
        )
    );

    $opml = new OPML($opml_data);
    echo $opml->render();
}

// Turn an array of posts into a JSON
function generate_json($posts) {
    return json_encode($posts);
}

// Create Zip files
function Zip($source, $destination, $include_dir = false) {

    if (!extension_loaded('zip') || !file_exists($source)) {
        return false;
    }

    if (file_exists($destination)) {
        unlink($destination);
    }

    $zip = new ZipArchive();

    if (!$zip->open($destination, ZIPARCHIVE::CREATE)) {
        return false;
    }

    if (is_dir($source) === true) {

        $files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source), RecursiveIteratorIterator::SELF_FIRST);

        foreach ($files as $file) {
            $file = str_replace('\\', '/', $file);

            // Ignore "." and ".." folders
            if (in_array(substr($file, strrpos($file, '/') + 1), array('.', '..')))
                continue;

            if (is_dir($file) === true) {
                $zip->addEmptyDir(str_replace($source . '/', '', $file . '/'));
            } else if (is_file($file) === true) {
                $zip->addFromString(str_replace($source . '/', '', $file), file_get_contents($file));
            }
        }
    } else if (is_file($source) === true) {
        $zip->addFromString(basename($source), file_get_contents($source));
    }

    return $zip->close();
}

// TRUE if the current page is the front page.
function is_front() {
    $req = $_SERVER['REQUEST_URI'];
    if ($req == site_path() . '/' || strpos($req, site_path() . '/?page') !== false) {
        return true;
    } else {
        return false;
    }
}

// TRUE if the current page is an index page like frontpage, tag index, archive index and search index.
function is_index() {
    $req = $_SERVER['REQUEST_URI'];
    if (strpos($req, '/archive/') !== false || strpos($req, '/tag/') !== false || strpos($req, '/search/') !== false || $req == site_path() . '/' || strpos($req, site_path() . '/?page') !== false) {
        return true;
    } else {
        return false;
    }
}

// Return blog title
function blog_title() {
    return config('blog.title');
}

// Return blog tagline
function blog_tagline() {
    return config('blog.tagline');
}

// Return blog description
function blog_description() {
    return config('blog.description');
}

// Return blog copyright
function blog_copyright() {
    return config('blog.copyright');
}

// Return author info
function authorinfo($title = null, $body = null) {
    if (config('author.info') == 'true') {
        return '<div class="author-info"><h4>by <strong>' . $title . '</strong></h4>' . $body . '</div>';
    }
}

function head_contents($title, $description, $canonical) {
    $styleImage = config('lightbox');
    $jq = config('jquery');
    $output = '';

    $title = '<title>' . $title . '</title>';
    $favicon = '<link href="' . site_url() . 'favicon.ico" rel="icon" type="image/x-icon"/>';
    $charset = '<meta charset="utf-8" />';
    $generator = '<meta content="htmly" name="generator"/>';
    $xua = '<meta http-equiv="X-UA-Compatible" content="IE=edge" />';
    $viewport = '<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" user-scalable="no" />';
    $description = '<meta name="description" content="' . $description . '"/>';
    $sitemap = '<link rel="sitemap" href="' . site_url() . 'sitemap.xml" />';
    $canonical = '<link rel="canonical" href="' . $canonical . '" />';
    $feed = '<link rel="alternate" type="application/rss+xml" title="' . blog_title() . ' Feed" href="' . site_url() . 'feed/rss" />';
    $lightboxcss = '<link href="' . site_url() . 'system/plugins/lightbox/css/lightbox.css" rel="stylesheet" />';
    $jquery = '<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>';
    $lightbox = '<script src="' . site_url() . 'system/plugins/lightbox/js/lightbox-2.6.min.js"></script>';
    $corejs = '<script src="' . site_url() . 'system/resources/htmly.js"></script>';

    if ($styleImage == 'on') {
        $output .= $title . "\n" . $favicon . "\n" . $charset . "\n" . $generator . "\n" . $xua . "\n" . $viewport . "\n" . $description . "\n" . $sitemap . "\n" . $canonical . "\n" . $feed . "\n" . $lightboxcss . "\n" . $jquery . "\n" . $lightbox . "\n" . $corejs . "\n";
    } else {
        if ($jq == 'enable') {
            $output .= $title . "\n" . $favicon . "\n" . $charset . "\n" . $generator . "\n" . $xua . "\n" . $viewport . "\n" . $description . "\n" . $sitemap . "\n" . $canonical . "\n" . $feed . "\n" . $jquery . "\n";
        } else {
            $output .= $title . "\n" . $favicon . "\n" . $charset . "\n" . $generator . "\n" . $xua . "\n" . $viewport . "\n" . $description . "\n" . $sitemap . "\n" . $canonical . "\n" . $feed . "\n";
        }
    }

    return $output;
}

// Return toolbar
function toolbar() {
    $user = $_SESSION[config("site.url")]['user'];
    $role = user('role', $user);
    $base = site_url();

    $CSRF = get_csrf();

    $updater = new Updater;

    echo <<<EOF
	<link href="{$base}themes/default/css/toolbar.css" rel="stylesheet" />
EOF;
    echo '<div id="toolbar"><ul>';
    echo '<li><a href="' . $base . 'admin">Admin</a></li>';
    if ($role === 'admin') {
        echo '<li><a href="' . $base . 'admin/posts">Posts</a></li>';
    }
    echo '<li><a href="' . $base . 'admin/mine">Mine</a></li>';
    echo '<li><a href="' . $base . 'add/post">Add post</a></li>';
    echo '<li><a href="' . $base . 'add/page">Add page</a></li>';
    echo '<li><a href="' . $base . 'edit/profile">Edit profile</a></li>';
    echo '<li><a href="' . $base . 'admin/import">Import</a></li>';
    echo '<li><a href="' . $base . 'admin/backup">Backup</a></li>';
    echo '<li><a href="' . $base . 'admin/clear-cache">Clear cache</a></li>';
    if ($updater->updateAble()) {
        echo '<li><a href="' . $base . 'admin/update/now/' . $CSRF . '">Update to ' . $updater->getName() . '</a></li>';
    }
    echo '<li><a href="' . $base . 'logout">Logout</a></li>';

    echo '</ul></div>';
}

// File cache 
function file_cache($request) {

    $c = str_replace('/', '#', str_replace('?', '~', $request));
    $cachefile = 'cache/page/' . $c . '.cache';

    if (file_exists($cachefile)) {
        header('Content-type: text/html; charset=utf-8');
        readfile($cachefile);
        die;
    }
}

function generate_csrf_token() {
    $_SESSION[config("site.url")]['csrf_token'] = sha1(microtime(true) . mt_rand(10000, 90000));
}

function get_csrf() {
    if (!isset($_SESSION[config("site.url")]['csrf_token']) || empty($_SESSION[config("site.url")]['csrf_token'])) {
        generate_csrf_token();
    }
    return $_SESSION[config("site.url")]['csrf_token'];
}

function is_csrf_proper($csrf_token) {
    if ($csrf_token == get_csrf()) {
        return true;
    }
    return false;
}

function add_view($page)
{
    $filename = "cache/count.json";
    $views = array();
    if(file_exists($filename))
    {
        $views = json_decode(file_get_contents($filename),true);
    }
    if(isset($views[$page]))
    {
        $views[$page]++;
    }
    else
    {
        $views[$page] = 1;
    }
    file_put_contents($filename,json_encode($views));
}

function get_views($page)
{
    static $_views = array();
    
    if(empty($_views))
    {
        $filename = "cache/count.json";
        if(file_exists($filename))
        {
            $_views = json_decode(file_get_contents($filename),true);
        }
    }
    if(isset($_views[$page]))
    {
        return $_views[$page];
    }
    return -1;
}