cvd/cvd-theme/functions.php

<?php

// Allow [shortcode] in templates
add_action( 'acf/init', 'set_acf_settings' );
function set_acf_settings() {
    acf_update_setting( 'enable_shortcode', true );
}
add_filter( 'acf/shortcode/allow_in_block_themes_outside_content', '__return_true' );

// Current Year [shortcode]
function current_year_shortcode() {
    return date('Y');
}
add_shortcode( 'current_year', 'current_year_shortcode' );


// General Settings - Set Default Featured Image Placeholder if none exists
if ( ! class_exists( 'DefaultThumbnailID' ) ) {
    class DefaultThumbnailID {
    private static $instance;
    public function __construct() {
    // Add the option field to the General page.
    add_action( 'admin_init', array( &$this, 'show_default_thumbnail_id_option' ) );
    // Check if the default featured image exists.
    add_filter( 'has_post_thumbnail', array( &$this, 'set_has_post_thumbnail_value' ) );
    // Display the default featured image.
    add_filter( 'post_thumbnail_html', array( &$this, 'set_default_post_thumbnail_image' ), 10, 4 );
    }
    public static function get_instance() {
    if ( is_null( self::$instance ) ) {
    self::$instance = new self();
    }
    return self::$instance;
    }
    public function show_default_thumbnail_id_option() {
    register_setting(
    'general', // General page
    '_default_thumbnail_id' // Option name
    );
    add_settings_field(
    'default_thumbnail_id', // ID
    __( 'Default thumbnail ID', 'text-domain' ), // Option title
    array( &$this, 'display_input_field' ), // Display callback
    'general', // General page
    'default' // General page section
    );
    }
    public function display_input_field() {
    $value = get_option( '_default_thumbnail_id' );
    $value = wp_attachment_is_image( $value ) ? $value : '';
    ?>
    <input id="default_thumbnail_id" value="<?php echo esc_attr( $value ); ?>" name="_default_thumbnail_id"/>
    <?php
    }
    function set_has_post_thumbnail_value( $has_image ) {
    $default_thumbnail_id = get_option( '_default_thumbnail_id' );
    if ( ! empty( $default_thumbnail_id ) ) {
    $has_image = true;
    }
    return $has_image;
    }
    function set_default_post_thumbnail_image( $image, $post_id, $post_thumbnail_id, $size ) {
    $default_thumbnail_id = get_option( '_default_thumbnail_id' );
    if ( empty( $image ) && ! empty( $default_thumbnail_id ) ) {
    $image = wp_get_attachment_image( $default_thumbnail_id, $size );
    }
    return $image;
    }
    }
    // Instantiate the class object.
    DefaultThumbnailID::get_instance();
    }


// Order by meta_key 'sortname' for post type 'artists'
function my_pre_get_posts( $query ) {
    // do not modify queries in the admin
    if( is_admin() ) {
        return $query;
    }
    // only modify queries for 'artist' post type
    if( isset($query->query_vars['post_type']) && $query->query_vars['post_type'] == 'artist' ) {
        $query->set('orderby', 'meta_value'); 
        $query->set('meta_key', 'sortname'); 
        $query->set('order', 'ASC'); 
    }
    // return
    return $query;
}
add_action('pre_get_posts', 'my_pre_get_posts');


// Exclude Pages from Search Results
function search_filter($query) {
	if ( ! is_admin() && $query->is_main_query() ) {
		if ( $query->is_search ) {
			$query->set( 'post_type', 'post' );
		}
	}
}
add_action( 'pre_get_posts', 'search_filter' );


/**
 * This function modifies the main WordPress query to include an array of 
 * post types instead of the default 'post' post type.
 * @param object $query The main WordPress query.
 */
function include_custom_post_types_in_search_results( $query ) {
    if ( $query->is_main_query() && $query->is_search() && ! is_admin() ) {
        $query->set( 'post_type', array( 'post', 'artist' ) );
    }
}
add_action( 'pre_get_posts', 'include_custom_post_types_in_search_results' );