Use event title in theme title (TEC 3.0)

add_filter('the_title', 'tribe_restore_title');

/**
 * Tries to detect if the content is The Events Calendar related and returns the expected title. Useful where a theme
 * displays the post/page title in a certain format before the event content is injected.
 *
 * Targets TEC 3.0.2. Notes: it looks on face value like better use could be made of tribe_is_event_query() and
 * tribe_is_event() here, but because we're early in the request and want to avoid notices we'll avoid those.
 *
 * @param $title
 * @return string
 */
function tribe_restore_title($title) {
    global $wp_query;
    global $post;

    if (-9999 !== $post->ID) return $title;
    if ( ! isset($wp_query->tribe_is_event) || ! $wp_query->tribe_is_event) return $title;
    if ( ! is_a($wp_query->posts[0], 'WP_Post') || $wp_query->posts[0]->ID == $post->ID) return $title;

    if (is_singular()) return $wp_query->posts[0]->post_title;
    else return tribe_get_events_title();
}