function bp_nouveau_ajax_get_single_activity_content() {
	$response = array(
		'feedback' => sprintf(
			'<div class="bp-feedback bp-messages error">%s</div>',
			esc_html__( 'There was a problem displaying the content. Please try again.', 'buddypress' )
		),
	);

	// Bail if not a POST action.
	if ( ! bp_is_post_request() ) {
		wp_send_json_error( $response );
	}

	// Nonce check!
	if ( empty( $_POST['nonce'] ) || ! wp_verify_nonce( $_POST['nonce'], 'bp_nouveau_activity' ) ) {
		wp_send_json_error( $response );
	}

	$activity_array = bp_activity_get_specific(
		array(
			'activity_ids'     => $_POST['id'],
			'display_comments' => 'stream',
		)
	);

	if ( empty( $activity_array['activities'][0] ) ) {
		wp_send_json_error( $response );
	}

	$activity = $activity_array['activities'][0];

	/**
	 * Fires before the return of an activity's full, non-excerpted content via a POST request.
	 *
	 * @since 3.0.0
	 *
	 * @param string $activity Activity content. Passed by reference.
	 */
	do_action_ref_array( 'bp_nouveau_get_single_activity_content', array( &$activity ) );

	// Activity content retrieved through AJAX should run through normal filters, but not be truncated.
	remove_filter( 'bp_get_activity_content_body', 'bp_activity_truncate_entry', 5 );

	/** This filter is documented in bp-activity/bp-activity-template.php */
	$content = apply_filters( 'bp_get_activity_content_body', $activity->content );

	wp_send_json_success( array( 'contents' => $content ) );
}