IDF pre-get-posts.php

<?php

    // Source: http://clubmate.fi/date-archives-for-wordpress-custom-post-types/

    // Custom post type specific rewrite rules
    function events_rewrite_rules( $wp_rewrite ) {
        // Here we're hardcoding the CPT in
        $event_rules       = generate_date_archives_events( 'event', $wp_rewrite );
        $wp_rewrite->rules = $event_rules + $wp_rewrite->rules;

        return $wp_rewrite;
    }
    add_action( 'generate_rewrite_rules', 'events_rewrite_rules' );

    // Generate date archive rewrite rules for a given custom post type
    function generate_date_archives_events( $cpt, $wp_rewrite ) {
        $event_rules  = array();
        $post_type    = get_post_type_object( $cpt );
        $slug_archive = false;
        if ( $post_type ) {
            $slug_archive = $post_type->has_archive;
        }
        if ( $slug_archive === false ) {
            return $event_rules;
        }
        if ( $slug_archive === true ) {
            // Here's my edit to the original function, let's pick up custom slug from the post type
            // object if user has specified one.
            $slug_archive = $post_type->rewrite[ 'slug' ];
            // $slug_archive = $post_type->name; // what does this do ?
        }

        $dates = array(
            array(
                'rule' => "([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})",
                'vars' => array( 'year', 'monthnum', 'day' )
            ),
            array(
                'rule' => "([0-9]{4})/([0-9]{1,2})",
                'vars' => array( 'year', 'monthnum' )
            ),
            array(
                'rule' => "([0-9]{4})",
                'vars' => array( 'year' )
            )
        );

        foreach ( $dates as $data ) {
            $query = 'index.php?post_type=' . $cpt;
            $rule  = $slug_archive . '/' . $data[ 'rule' ];

            $i = 1;
            foreach ( $data[ 'vars' ] as $var ) {
                $query .= '&' . $var . '=' . $wp_rewrite->preg_index( $i );
                $i++;
            }

            $event_rules[ $rule . "/?$" ]                               = $query;
            $event_rules[ $rule . "/feed/(feed|rdf|rss|rss2|atom)/?$" ] = $query . "&feed=" . $wp_rewrite->preg_index( $i );
            $event_rules[ $rule . "/(feed|rdf|rss|rss2|atom)/?$" ]      = $query . "&feed=" . $wp_rewrite->preg_index( $i );
            $event_rules[ $rule . "/page/([0-9]{1,})/?$" ]              = $query . "&paged=" . $wp_rewrite->preg_index( $i );
        }

        return $event_rules;
    }

    function add_vars( $vars ) {
        $vars[] = "continent";
        $vars[] = "subpage";
        $vars[] = "category";
        $vars[] = "booking_id";

        return $vars;
    }
    add_filter( 'query_vars', 'add_vars' );

    function idf_rewrite_event_subpages() {
        add_rewrite_rule( 'races/(?!type|categories)([^/]*)/([a-z-]+)/?$', 'index.php?post_type=event&name=$matches[1]&subpage=$matches[2]', 'top' );
        add_rewrite_rule( 'races/([^/]*)/riders-list/([a-z-]+)/?$', 'index.php?post_type=event&name=$matches[1]&subpage=riders-list&category=$matches[2]', 'top' );
        add_rewrite_rule( 'my-idf/([a-z-]+)/?$', 'index.php?post_type=page&pagename=my-idf&subpage=$matches[1]', 'top' );
    }
    add_filter( 'init', 'idf_rewrite_event_subpages', 1, 3 );

    function idf_rewite_continent_urls() {
        add_rewrite_rule( 'races/([a-z-]+)/?$', 'index.php?post_type=event&continent=$matches[1]', 'top' );
    }
    add_filter( 'init', 'idf_rewite_continent_urls', 1, 3 );

    function idf_rewrite_profile_pages() {
        add_rewrite_rule( 'member/([a-zA-Z0-9_-]+)/([a-z-]+)/?$', 'index.php?author_name=$matches[1]&subpage=$matches[2]', 'top' );
        add_rewrite_rule( 'member/([a-zA-Z0-9_-]+)/mentioned/page/([0-9]+)/?$', 'index.php?paged=$matches[2]&author_name=$matches[1]&subpage=mentioned', 'top' );
        add_rewrite_rule( 'member/([a-zA-Z0-9_-]+)/written/page/([0-9]+)/?$', 'index.php?paged=$matches[2]&author_name=$matches[1]&subpage=written', 'top' );
    }
    add_filter( 'init', 'idf_rewrite_profile_pages', 1, 3 );

    // is this still needed ????
    function new_subpage_permalink( $permalink, $post, $leavename = false ) {

        // Get post
        if ( ! $post ) {

            return $permalink;
        }

        $post_type = get_post_type( $post->ID );
        if ( in_array( $post_type, array( 'event', 'page' ) ) ) {
            if ( get_query_var( 'subpage' ) ) {
                $new_permalink = $permalink . get_query_var( 'subpage' ) . '/';

                return $new_permalink;
            }
        }

        return $permalink;
    }
    add_filter( 'post_link', 'new_subpage_permalink', 10, 3 );
    // add_filter( 'post_type_link', 'new_subpage_permalink', 10, 3 );

    // Change the author permalink base to member
    function change_author_permalinks() {
        global $wp_rewrite;
        $wp_rewrite->author_base = 'member';
        $wp_rewrite->flush_rules();
    }
    add_action( 'init', 'change_author_permalinks' );