functions.php

<?php

// Define paths
define( 'DOCS_URI', get_stylesheet_directory_uri() . '/_docpress' );
define( 'DOCS_PATH', dirname(__FILE__) . '/_docpress' );

// Require theme functions
require_once( 'functions/enqueue-styles.php' );
require_once( 'functions/enqueue-scripts.php' );

// Helpers
require_once( 'functions/get-current-url.php' );

// Docpress
require_once( 'functions/docpress-get-dirs.php' );
require_once( 'functions/docpress-get-file-path.php' );
require_once( 'functions/docpress-make-absolute-urls.php' );

define( 'DOCS_FILE_PATH', docpress_get_file_path() );

// Enables themes to manage the document title tag
add_action( 'after_setup_theme', function() {
	add_theme_support( 'title-tag' );
} );

// Remove unused scripts & styles.
add_action('init', function() {
	global $pagenow;

	if ( 'wp-login.php' !== $pagenow && ! is_admin() ) {
		wp_deregister_script( 'wp-embed' );
		wp_deregister_script( 'jquery' );
		remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
		remove_action( 'wp_print_styles', 'print_emoji_styles' );
	}
} );

// Block 301 redirect.
add_filter( 'redirect_canonical', function( $redirect_url, $requested_url ) {
	if ( strpos( $requested_url, 'api/tide/v1' ) === false ) {
		return '';
	}
}, 10, 2 );

/**
 * Filter to override a 404.
 *
 * The links are actually 404 errors, the pages don't exist really. We're faking status 200
 * We just use the routes to pass in info on what file we want to include within index.php.
 */
add_filter( 'template_redirect', function() {
	global $wp_query;

	if ( file_exists( DOCS_FILE_PATH ) ) {
		add_filter( 'wp_title', function( $title ) {
			$title     = 'Tide Docs';
			$fileparts = explode( '/', get_current_url() );
			$page      = end( $fileparts );
			$new_title = ucwords( str_replace( '-', ' ', $page ) );

			if ( $new_title ) {
				if ( 'Gcp' === $new_title ) {
					$new_title = 'Google Cloud Platform';
				} else if ( 'Aws' === $new_title ) {
					$new_title = 'Amazon Web Services';
				} else if ( 'Search' === $new_title ) {
					$new_title = 'API Search';
				} else if ( 'Api' === $new_title ) {
					$new_title = 'API';
				} else if ( 'Phpcs Server' === $new_title ) {
					$new_title = 'PHPCS Server';
				}

				$title =  "$title — $new_title";
			}

			return $title;
		}, 10 );
		status_header( 200 );
		$wp_query->is_404 = false;
	}
} );

/**
 * Filter to override a 404.
 *
 * The links are actually 404 errors, the pages don't exist really. We're faking status 200
 * We just use the routes to pass in info on what file we want to include within index.php.
 */
add_filter( 'body_class', function( $classes ) {
	global $wp_query;

	if ( strpos( DOCS_FILE_PATH, '404.html' ) !== false && file_exists( DOCS_FILE_PATH ) ) {
		$classes[] = 'error404';
	}

	if ( strpos( DOCS_FILE_PATH, 'search.html' ) !== false && file_exists( DOCS_FILE_PATH ) ) {
		$classes[] = 'is-search';
	}

	return $classes;
} );

/**
 * Add GA tracking code to the HEAD.
 */
add_action( 'wp_head', function() {
	if ( strpos( get_home_url(), 'wptide.org' ) !== false ) { ?>

<!-- Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-135952573-1"></script>
<script>
	window.dataLayer = window.dataLayer || [];
	function gtag(){dataLayer.push(arguments);}
	gtag('js', new Date());
	gtag('config', 'UA-135952573-1');
</script>

	<?php }
}, 0 );