MT - TEC - Support Accelerated Mobile Pages (AMP) for The Events Calendar's Events, Organizers, and Venues

functions.php

<?php

/**
 * MT - TEC - Support Accelerated Mobile Pages (AMP) for The Events Calendar's Events, Organizers, and Venues
 *
 * See the comments in tribe_single_event_amp_template()!!!
 * GIF of using AMP plugin's default template: https://cl.ly/382y0d221n38
 *
 * from https://gist.github.com/cliffordp/af0b1645ff0e5e25edc10ffcccf2df29
 *
 * @see tribe_single_event_amp_template
 *
 * @link https://wordpress.org/plugins/amp/
 * @link https://github.com/Automattic/amp-wp/blob/master/readme.md#custom-post-type-support
 */

// Register the Custom Post Types with AMP
add_action( 'amp_init', 'tribe_events_orgs_venues_support_amp' );
function tribe_events_orgs_venues_support_amp() {
	if (
		! class_exists( 'Tribe__Events__Main' )
		|| ! defined( 'AMP_QUERY_VAR' )
	) {
		return false;
	}

	// Register Events
	add_post_type_support( Tribe__Events__Main::POSTTYPE, AMP_QUERY_VAR );

	// Override AMP's templating with Event Single template
	if ( class_exists( 'Tribe__Events__Templates' ) ) {
		add_filter( 'amp_post_template_file', 'tribe_single_event_amp_template', 10, 3 );
	}

	// Organizers and Venues require Events Calendar PRO to be activated
	if ( class_exists( 'Tribe__Events__Pro__Main' ) ) {
		// Register Organizers
		add_post_type_support( Tribe__Events__Main::ORGANIZER_POST_TYPE, AMP_QUERY_VAR );

		// Register Venues
		add_post_type_support( Tribe__Events__Main::VENUE_POST_TYPE, AMP_QUERY_VAR );
	}
}

/**
 * Override the default template for Accelerated Mobile Pages (AMP) for The Events Calendar's Events
 *
 * Requires creating your own file at [your-child-theme]/tribe-events/single-event-amp.php
 * based on single-event.php and removing the items you do not want (including removing
 * do_action() where you see appropriate).
 * You could also just change 'single-event-amp' to 'single-event' and then the pre-existing
 * single-event.php template will load but its CSS and JS will not... so what's the point...
 *
 * @param string $file
 * @param string $type
 * @param WP_Post $post
 *
 * @return string
 */
function tribe_single_event_amp_template( $file, $type, $post ) {
	if ( 'single' === $type && Tribe__Events__Main::POSTTYPE === $post->post_type ) {
		// $file = Tribe__Events__Templates::getTemplateHierarchy( 'single-event-amp' );
	}

	return $file;
}