functions.php

<?php

/**
 * Check for MBB Theme Companion Plugin / Warn if not loaded.
 */
function check_theme_dependencies() {
	if ( ! defined( 'MBB_PLUGIN_DIR' ) ) {
		add_action( 'admin_notices', 'mbb_warning' );
	}
}

add_action( 'init', 'check_theme_dependencies' );

/**
 * Callback for the warning message display.
 */
function mbb_warning() {
	$html = '<div class ="update-nag"><p>%s</p></div>';
	$msg  = 'The MBB Theme Companion plugin is not activated. Please make sure it is installed and activated before continuing.';
	echo esc_html( sprintf( $html, $msg ) );
}


/**
 * Load up libraries, etc.
 */
function mbb_setup_theme() {
	// Theme options page
	if ( defined( 'FM_VERSION' ) && defined( 'MBB_PLUGIN_DIR' ) ) {
		require_once( 'inc/class-mbb-theme-page-about.php' );
		require_once( 'inc/class-mbb-theme-widget-areas.php' );
		require_once( 'inc/class-mbb-theme-contact-form.php' );
	}
}

add_action( 'init', 'mbb_setup_theme' );

/**
 * Filter the array of body classes.
 *
 * @param array $classes Body css classes.
 *
 * @return array $classes Modified body css classes.
 */
function mbb_filter_body_class( $classes ) {
	global $post;
	if ( ! empty( $post->post_type ) ) {
		if ( 'page' === $post->post_type ) {
			if ( is_page_template( 'page-wide.php' ) && ! in_array( 'no_sidebar', $classes, true ) ) {
				$classes[] = 'no_sidebar';
			} else {
				$classes[] = $post->post_name;
			}
		} else {
			if ( is_singular( [ 'staff', 'players' ] ) ) {
				$classes[] = 'no_sidebar';
			}
			if ( is_home() && ( 'blog' === $classes[0] ) ) {
				$classes[0] = 'news';
			} else {
				$classes[] = $post->post_name;
			}
		}
	}

	return $classes;
}

add_filter( 'body_class', 'mbb_filter_body_class' );

/**
 * Adjust the max width for image sourceset.
 *
 * @return int The sourceset image max width.
 */
function mbb_max_srcset_image_width() {
	return 800;
}

add_filter( 'max_srcset_image_width', 'mbb_max_srcset_image_width' );

/**
 * Add additional image sizes.
 */
function mbb_add_image_sizes() {
	add_image_size( 'mbb-post-large', 747, 9999, false );
}

add_action( 'after_setup_theme', 'mbb_add_image_sizes' );


/**
 * Load theme scripts and styles.
 */
function mbb_enqueue_scripts_styles() {
	// Load main stylesheet
	wp_enqueue_style( 'mbb-style', get_stylesheet_uri() );
	wp_enqueue_script( 'mbb-main', get_template_directory_uri() . '/assets/js/main.min.js', [ 'jquery' ], '1.0.0', true );
}

add_action( 'wp_enqueue_scripts', 'mbb_enqueue_scripts_styles' );

/**
 * Get page template part
 */
function mbb_get_page_template_parts() {
	$pages = new WP_Query( [
		'posts_per_page' => 25,
		'post_type'      => 'page',
	] );
	if ( ! empty( $pages->posts ) ) {
		foreach ( $pages->posts as $page ) {
			if ( is_page( $page->post_name ) ) {
				get_template_part( "template-parts/$page->post_name" );
			}
		}
	}
}

/**
 * Get theme settings, returning settings array or value by key.
 *
 * @param string $key the array key.
 *
 * @return string or array theme setting(s)
 */
function mbb_get_theme_settings( $key = '' ) {
	$mbb_theme_settings = get_option( 'mbb_theme_settings' );
	if ( ! empty( $mbb_theme_settings ) ) {
		if ( ! empty( $key ) && ! empty( $mbb_theme_settings[ $key ] ) ) {
			return $mbb_theme_settings[ $key ];
		}

		return $mbb_theme_settings;
	}
}

/**
 * Display site footer
 *
 * Show sidebar within footer.php if the page should
 * contain a sidebar based on classes in filtered
 * body class.
 *
 * @uses mbb_filter_body_class()
 */
function mbb_get_footer() {
	$search  = 'no_sidebar';
	$classes = get_body_class();
	if ( ! empty( $classes ) && is_array( $classes ) && ! in_array( $search, $classes, true ) ) {
		get_sidebar();
	}
}

/**
 * Get the template part.
 *
 * @param string $template_part The template part.
 */
function mbb_get_template_part( $template_part ) {
	if ( ! empty( $template_part ) ) {
		require_once( locate_template( $template_part ) );
	}
}