<?php
/**
 * Custom functions that act independently of the theme templates.
 *
 * Eventually, some of the functionality here could be replaced by core features.
 *
 * @package MTWTeam
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Adds custom classes to the array of body classes.
 *
 * @param array $classes Classes for the body element.
 * @return array
 */
function mtwfn_body_classes( $classes ) {
	// Adds a class of group-blog to blogs with more than 1 published author.
	if ( is_multi_author() ) {
		$classes[] = 'group-blog';
	}

	// Adds a class of hfeed to non-singular pages.
	if ( ! is_singular() ) {
		$classes[] = 'hfeed';
	}

	return $classes;
}
add_filter( 'body_class', 'mtwfn_body_classes' );

/**
 * Adds custom classes to the array of layout classes.
 *
 * @param array $classes Classes for the layout element.
 */
function mtwfn_layout_class( $classes = array() ) {
	$classes = (array) $classes;

	if ( MTW_Sidebar::has_sidebar() ) {
		$classes[] = sprintf( 'sidebar-%s', MTW_Sidebar::get_sidebar_area() );
	} else {
		$classes[] = 'no-sidebar';
	}

	$classes = apply_filters( 'mtwfn_layout_class', $classes );

	echo 'class="' . esc_attr( join( ' ', $classes ) ) . '"';
}

/**
 * The excerpt length.
 */
function mtwfn_excerpt_length() {
	return 65;
}
add_filter( 'excerpt_length', 'mtwfn_excerpt_length', 999 );

/**
 * The excerpt more.
 *
 * @return sring
 */
function mtwfn_excerpt_more() {
	return '&hellip; <a href="'. esc_url( get_the_permalink() ) .'" class="more-link">'. esc_html__( 'Xem thêm &raquo;', 'maycn' ).'</a>';
}
add_filter( 'excerpt_more', 'mtwfn_excerpt_more' );

if ( mtwfn_option( 'fb_sdk_js', null, false ) ) {
/**
 * Include Facebook App ID on footer.
 * 
 */
function mtwfn_include_facebook_app_id() {
	?>
	<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/<?php mtwfn_option( 'fb_language' ); ?>/sdk.js#xfbml=1&version=v2.7&appId=<?php mtwfn_option( 'facebook_app_id' ); ?>";
	  fjs.parentNode.insertBefore(js, fjs);
	}(document, 'script', 'facebook-jssdk'));</script>
<?php
}
add_action( 'wp_footer', 'mtwfn_include_facebook_app_id' );
}

/**
 * Remove wp emojis.
 */
function mtwfn_disable_wp_emojicons() {

	// all actions related to emojis
	remove_action( 'admin_print_styles', 'print_emoji_styles' );
	remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
	remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
	remove_action( 'wp_print_styles', 'print_emoji_styles' );
	remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
	remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
	remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );

	// filter to remove TinyMCE emojis
	add_filter( 'tiny_mce_plugins', 'mtwfn_disable_emojicons_tinymce' );
	add_filter( 'emoji_svg_url', '__return_false' );
}
add_action( 'init', 'mtwfn_disable_wp_emojicons' );

/**
 * Remove wp emojis callback function.
 */
function mtwfn_disable_emojicons_tinymce( $plugins ) {
	if ( is_array( $plugins ) ) {
		return array_diff( $plugins, array( 'wpemoji' ) );
	} else {
		return array();
	}
}