<?php

// redirect /?s to /search/
// http://txfx.net/wordpress-plugins/nice-search/
function roots_nice_search_redirect() {
	if (is_search() && strpos($_SERVER['REQUEST_URI'], '/wp-admin/') === false && strpos($_SERVER['REQUEST_URI'], '/search/') === false) {
		wp_redirect(home_url('/search/' . str_replace(array(' ', '%20'), array('+', '+'), urlencode(get_query_var( 's' )))), 301);
	    exit();
	}
}

add_action('template_redirect', 'roots_nice_search_redirect');

function roots_search_query($escaped = true) {
	$query = apply_filters('roots_search_query', get_query_var('s'));
	if ($escaped) {
    	$query = esc_attr($query);
	}
 	return urldecode($query);
}

add_filter('get_search_query', 'roots_search_query');

// root relative URLs for everything
// inspired by http://www.456bereastreet.com/archive/201010/how_to_make_wordpress_urls_root_relative/
// thanks to Scott Walkinshaw (scottwalkinshaw.com)
function roots_root_relative_url($input) {
	$output = preg_replace_callback(
		'!(https?://[^/|"]+)([^"]+)?!',
		create_function(
			'$matches',
			// if full URL is site_url, return a slash for relative root
			'if (isset($matches[0]) && $matches[0] === site_url()) { return "/";' .
			// if domain is equal to site_url, then make URL relative 
			'} elseif (isset($matches[0]) && strpos($matches[0], site_url()) !== false) { return $matches[2];' .
			// if domain is not equal to site_url, do not make external link relative
			'} else { return $matches[0]; };'
		),
		$input
	);
	return $output;
}

// Terrible workaround to remove the duplicate subfolder in the src of JS/CSS tags
// Example: /subfolder/subfolder/css/style.css 
function roots_fix_duplicate_subfolder_urls($input) {
	$output = roots_root_relative_url($input);
	preg_match_all('!([^/]+)/([^/]+)!', $output, $matches);
	if (isset($matches[1]) && isset($matches[2])) {
		if ($matches[1][0] === $matches[2][0]) {
			$output = substr($output, strlen($matches[1][0]) + 1);
		}
	}
	return $output;
}

$roots_options = roots_get_theme_options();
if (!is_admin() && !in_array($GLOBALS['pagenow'], array('wp-login.php', 'wp-register.php')) && $roots_options['root_relative_urls']) {
	add_filter('bloginfo_url', 'roots_root_relative_url');
	add_filter('theme_root_uri', 'roots_root_relative_url');
	add_filter('stylesheet_directory_uri', 'roots_root_relative_url');
	add_filter('template_directory_uri', 'roots_root_relative_url');
	add_filter('script_loader_src', 'roots_fix_duplicate_subfolder_urls');
	add_filter('style_loader_src', 'roots_fix_duplicate_subfolder_urls');
	add_filter('plugins_url', 'roots_root_relative_url');	
	add_filter('the_permalink', 'roots_root_relative_url');
	add_filter('wp_list_pages', 'roots_root_relative_url');
	add_filter('wp_list_categories', 'roots_root_relative_url');
	add_filter('wp_nav_menu', 'roots_root_relative_url');
	add_filter('the_content_more_link', 'roots_root_relative_url');
	add_filter('the_tags', 'roots_root_relative_url');
	add_filter('get_pagenum_link', 'roots_root_relative_url');
	add_filter('get_comment_link', 'roots_root_relative_url');
	add_filter('month_link', 'roots_root_relative_url');
	add_filter('day_link', 'roots_root_relative_url');
	add_filter('year_link', 'roots_root_relative_url');
	add_filter('tag_link', 'roots_root_relative_url');
	add_filter('the_author_posts_link', 'roots_root_relative_url');
}

// remove root relative URLs on any attachments in the feed
function roots_root_relative_attachment_urls() {
	$roots_options = roots_get_theme_options();
	if (!is_feed() && $roots_options['root_relative_urls']) {
		add_filter('wp_get_attachment_url', 'roots_root_relative_url');
		add_filter('wp_get_attachment_link', 'roots_root_relative_url');
	}
}

add_action('pre_get_posts', 'roots_root_relative_attachment_urls');

// remove dir and set lang="en" as default (rather than en-US)
function roots_language_attributes() {
	$attributes = array();
	$output = '';
	$lang = get_bloginfo('language');
	if ($lang && $lang !== 'en-US') {
		$attributes[] = "lang=\"$lang\"";
	} else {
		$attributes[] = 'lang="en"';
	}

	$output = implode(' ', $attributes);
	$output = apply_filters('roots_language_attributes', $output);
	return $output;
}

add_filter('language_attributes', 'roots_language_attributes');

// remove WordPress version from RSS feed
function roots_no_generator() { return ''; }
add_filter('the_generator', 'roots_no_generator');

// cleanup wp_head
function roots_noindex() {
	if (get_option('blog_public') === '0') {
		echo '<meta name="robots" content="noindex,nofollow">', "\n";
	}
}	

function roots_rel_canonical() {
	if (!is_singular()) {
		return;
	}

	global $wp_the_query;
	if (!$id = $wp_the_query->get_queried_object_id()) {
		return;
	}

	$link = get_permalink($id);
	echo "\t<link rel=\"canonical\" href=\"$link\">\n";
}

// remove CSS from recent comments widget
function roots_remove_recent_comments_style() {
	global $wp_widget_factory;
	if (isset($wp_widget_factory->widgets['WP_Widget_Recent_Comments'])) {
		remove_action('wp_head', array($wp_widget_factory->widgets['WP_Widget_Recent_Comments'], 'recent_comments_style'));
	}
}

// remove CSS from gallery
function roots_gallery_style($css) {
	return preg_replace("!<style type='text/css'>(.*?)</style>!s", '', $css);
}

function roots_head_cleanup() {
	// http://wpengineer.com/1438/wordpress-header/
	remove_action('wp_head', 'feed_links', 2);
	remove_action('wp_head', 'feed_links_extra', 3);
	remove_action('wp_head', 'rsd_link');
	remove_action('wp_head', 'wlwmanifest_link');
	remove_action('wp_head', 'index_rel_link');
	remove_action('wp_head', 'parent_post_rel_link', 10, 0);
	remove_action('wp_head', 'start_post_rel_link', 10, 0);
	remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);
	remove_action('wp_head', 'wp_generator');
	remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0);
	remove_action('wp_head', 'noindex', 1);	
	add_action('wp_head', 'roots_noindex');
	remove_action('wp_head', 'rel_canonical');	
	add_action('wp_head', 'roots_rel_canonical');
	add_action('wp_head', 'roots_remove_recent_comments_style', 1);	
	add_filter('gallery_style', 'roots_gallery_style');
	
	// stop Gravity Forms from outputting CSS since it's linked in header.php
	if (class_exists('RGForms')) {
		update_option('rg_gforms_disable_css', 1);
	}

	// deregister l10n.js (new since WordPress 3.1)
	// why you might want to keep it: http://wordpress.stackexchange.com/questions/5451/what-does-l10n-js-do-in-wordpress-3-1-and-how-do-i-remove-it/5484#5484
	// don't load jQuery through WordPress since it's linked in header.php
	if (!is_admin()) {
		wp_deregister_script('l10n');
		wp_deregister_script('jquery');
		wp_register_script('jquery', '', '', '', true);
	}	
}

add_action('init', 'roots_head_cleanup');

// cleanup gallery_shortcode()
function roots_gallery_shortcode($attr) {
	global $post, $wp_locale;

	static $instance = 0;
	$instance++;

	// Allow plugins/themes to override the default gallery template.
	$output = apply_filters('post_gallery', '', $attr);
	if ( $output != '' )
		return $output;

	// We're trusting author input, so let's at least make sure it looks like a valid orderby statement
	if ( isset( $attr['orderby'] ) ) {
		$attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] );
		if ( !$attr['orderby'] )
			unset( $attr['orderby'] );
	}

	extract(shortcode_atts(array(
		'order'      => 'ASC',
		'orderby'    => 'menu_order ID',
		'id'         => $post->ID,
		'icontag'    => 'figure',
		'captiontag' => 'figcaption',
		'columns'    => 3,
		'size'       => 'thumbnail',
		'include'    => '',
		'exclude'    => ''
	), $attr));

	$id = intval($id);
	if ( 'RAND' == $order )
		$orderby = 'none';

	if ( !empty($include) ) {
		$include = preg_replace( '/[^0-9,]+/', '', $include );
		$_attachments = get_posts( array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );

		$attachments = array();
		foreach ( $_attachments as $key => $val ) {
			$attachments[$val->ID] = $_attachments[$key];
		}
	} elseif ( !empty($exclude) ) {
		$exclude = preg_replace( '/[^0-9,]+/', '', $exclude );
		$attachments = get_children( array('post_parent' => $id, 'exclude' => $exclude, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );
	} else {
		$attachments = get_children( array('post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );
	}

	if ( empty($attachments) )
		return '';

	if ( is_feed() ) {
		$output = "\n";
		foreach ( $attachments as $att_id => $attachment )
			$output .= wp_get_attachment_link($att_id, $size, true) . "\n";
		return $output;
	}

	$captiontag = tag_escape($captiontag);
	$columns = intval($columns);
	$itemwidth = $columns > 0 ? floor(100/$columns) : 100;
	$float = is_rtl() ? 'right' : 'left';

	$selector = "gallery-{$instance}";

	$gallery_style = $gallery_div = '';
	if ( apply_filters( 'use_default_gallery_style', true ) )
		$gallery_style = "";
	$size_class = sanitize_html_class( $size );
	$gallery_div = "<section id='$selector' class='clearfix gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class}'>";
	$output = apply_filters( 'gallery_style', $gallery_style . "\n\t\t" . $gallery_div );

	$i = 0;
	foreach ( $attachments as $id => $attachment ) {
		// make the gallery link to the file by default instead of the attachment
		// thanks to Matt Price (countingrows.com)
    $link = isset($attr['link']) && $attr['link'] === 'attachment' ? 
      wp_get_attachment_link($id, $size, true, false) : 
      wp_get_attachment_link($id, $size, false, false);
		$output .= "
			<{$icontag} class=\"gallery-item\">
				$link
			";
		if ( $captiontag && trim($attachment->post_excerpt) ) {
			$output .= "
				<{$captiontag} class=\"gallery-caption\">
				" . wptexturize($attachment->post_excerpt) . "
				</{$captiontag}>";
		}
		$output .= "</{$icontag}>";
		if ( $columns > 0 && ++$i % $columns == 0 )
			$output .= '';
	}

	$output .= "</section>\n";

	return $output;
}

remove_shortcode('gallery');
add_shortcode('gallery', 'roots_gallery_shortcode');

// http://www.deluxeblogtips.com/2011/01/remove-dashboard-widgets-in-wordpress.html
function roots_remove_dashboard_widgets() {
	remove_meta_box('dashboard_incoming_links', 'dashboard', 'normal');
	remove_meta_box('dashboard_plugins', 'dashboard', 'normal');
	remove_meta_box('dashboard_primary', 'dashboard', 'normal');
	remove_meta_box('dashboard_secondary', 'dashboard', 'normal');
}

add_action('admin_init', 'roots_remove_dashboard_widgets');

// excerpt cleanup
function roots_excerpt_length($length) {
	return 40;
}

function roots_excerpt_more($more) {
	return ' &hellip; <a href="' . get_permalink() . '">' . __( 'Continued', 'roots' ) . '</a>';
}

add_filter('excerpt_length', 'roots_excerpt_length');
add_filter('excerpt_more', 'roots_excerpt_more');

// remove container from menus
function roots_nav_menu_args($args = '') {
	$args['container'] = false;
	return $args;
}

add_filter('wp_nav_menu_args', 'roots_nav_menu_args');

class roots_nav_walker extends Walker_Nav_Menu {
	function start_el(&$output, $item, $depth, $args) {
		global $wp_query;
	    $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

	    $slug = sanitize_title($item->title);

	    $class_names = $value = '';
	    $classes = empty( $item->classes ) ? array() : (array) $item->classes;

	    $classes = array_filter($classes, 'roots_check_current');

	    $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
	    $class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

	    $id = apply_filters( 'nav_menu_item_id', 'menu-' . $slug, $item, $args );
	    $id = strlen( $id ) ? ' id="' . esc_attr( $id ) . '"' : '';

	    $output .= $indent . '<li' . $id . $class_names . '>';

	    $attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : '';
	    $attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : '';
	    $attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : '';
	    $attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : '';

	    $item_output = $args->before;
	    $item_output .= '<a'. $attributes .'>';
	    $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
	    $item_output .= '</a>';
	    $item_output .= $args->after;

	    $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
	}
}

function roots_check_current($val) {
	return preg_match('/current-menu/', $val);
}

// add to robots.txt
// http://codex.wordpress.org/Search_Engine_Optimization_for_WordPress#Robots.txt_Optimization
function roots_robots() {
	echo "Disallow: /cgi-bin\n";
	echo "Disallow: /wp-admin\n";
	echo "Disallow: /wp-includes\n";
	echo "Disallow: /wp-content/plugins\n";
	echo "Disallow: /plugins\n";
	echo "Disallow: /wp-content/cache\n";
	echo "Disallow: /wp-content/themes\n";
	echo "Disallow: /trackback\n";
	echo "Disallow: /feed\n";
	echo "Disallow: /comments\n";
	echo "Disallow: /category/*/*\n";
	echo "Disallow: */trackback\n";
	echo "Disallow: */feed\n";
	echo "Disallow: */comments\n";
	echo "Disallow: /*?*\n";
	echo "Disallow: /*?\n";
	echo "Allow: /wp-content/uploads\n";
	echo "Allow: /assets";
}

add_action('do_robots', 'roots_robots');

// we don't need to self-close these tags in html5:
// <img>, <input>
function roots_remove_self_closing_tags($input) {
	return str_replace(' />', '>', $input);
}

add_filter('get_avatar', 'roots_remove_self_closing_tags');
add_filter('comment_id_fields', 'roots_remove_self_closing_tags');

// check to see if the tagline is set to default
// show an admin notice to update if it hasn't been changed
// you want to change this or remove it because it's used as the description in the RSS feed
function roots_notice_tagline() {
	echo '<div class="error">';
	echo '<p>', sprintf(__('Please update your <a href="%s">site tagline</a>', 'roots'), admin_url('options-general.php')), '</p>';
	echo '</div>';
}

if (get_option('blogdescription') === 'Just another WordPress site') { 
	add_action('admin_notices', 'roots_notice_tagline');
}

// set the post revisions to 5 unless the constant
// was set in wp-config.php to avoid DB bloat
if (!defined('WP_POST_REVISIONS')) define('WP_POST_REVISIONS', 5);

// allow more tags in TinyMCE including iframes
function roots_change_mce_options($options) {
	$ext = 'pre[id|name|class|style],iframe[align|longdesc|name|width|height|frameborder|scrolling|marginheight|marginwidth|src]';	
	if (isset($initArray['extended_valid_elements'])) {
		$options['extended_valid_elements'] .= ',' . $ext;
	} else {
		$options['extended_valid_elements'] = $ext;
	}
	return $options;
}

add_filter('tiny_mce_before_init', 'roots_change_mce_options');

//clean up the default WordPress style tags
add_filter('style_loader_tag', 'roots_clean_style_tag');

function roots_clean_style_tag($input) {
  preg_match_all("!<link rel='stylesheet'\s?(id='[^']+')?\s+href='(.*)' type='text/css' media='(.*)' />!", $input, $matches);
  //only display media if it's print
  $media = $matches[3][0] === 'print' ? ' media="print"' : '';                                                                             
  return '<link rel="stylesheet" href="' . $matches[2][0] . '"' . $media . '>' . "\n";
}

?>