Add youth member role

[steff-mueller]

Implemented a youth member role for content access which is assigned if the visitor is a member of your local church and has an age <=36.

[cs1m0n]

Hey Steffan,
and thank you so much for your contribution!

The code looks fine to me, but I wonder if that's the way we actually want to go ..
E.g. what happens if you want to target a youth member only from your local church? Will we then add another role for that?

I fear that without a clear goal for this, we'll continue adding more and more roles and end up having no control over the logic ..

Can you maybe describe the reason you need to identify youth members so we understand your use case?
Another solution to this is to have the logic inside the widget / plugin itself.

Only my 2 cents ..

[steff-mueller]

Hi @cs1m0n, as I have implemented it right now, the role only targets youth members from your local church. I agree with you that a more flexible logic is the way to go. We needed a quick-n-dirty solution to limit access of our youth meeting livestreams to youth members of our church.

[steff-mueller]

I found a way to accomplish our use case without changing the bcc-login plugin. I created a new separate plugin which applies the age restriction on the post/page. Maybe you want to add this snippet to the documentation?

wp-content/plugins/bcc-login-age-restriction/bcc-login-age-restriction.php:

<?php

/*
Plugin Name: BCC Login Age Restriction

Extension plugin for https://github.com/bcc-code/bcc-wp
*/

const dwjz_post_id = 1758; // the id of the post where to apply the age restriction
const dwjz_max_age = 36;

function dwjz_on_template_redirect() {
	// check post id
	if (get_the_ID() === dwjz_post_id && !dwjz_is_youth()) {
		return dwjz_not_allowed_to_view_page();
	}
}

add_action( 'template_redirect', 'dwjz_on_template_redirect', 1 );

function dwjz_filter_menu_items( $items ) {
	foreach ( $items as $key => $item ) {
		if ($item->object_id == dwjz_post_id && !dwjz_is_youth()) {
			unset( $items[ $key ] );
		}
	}
	
	return $items;
}

add_filter( 'wp_get_nav_menu_items', 'dwjz_filter_menu_items', 21 );

/*
Returns `true` if the current user's age is <= `dwjz_max_age`,
otherwise the function returns `false`.
*/
function dwjz_is_youth() {
	// Check if user is logged in to Wordpress
	if (!is_user_logged_in()) {
		return false;
	}

	// Check if oidc token is available
	if (!isset($_COOKIE['oidc_token_id'])) {
		return false;
	}

	// Check if oidc token is valid (still stored in transient)
	$token_id = $_COOKIE['oidc_token_id'];
	if ( ! empty( $token_id ) ) {
		$token = get_transient( 'oidc_id_token_' . $token_id );
	}
	if ( empty( $token ) ) {
		return false;
	}

	// Get token claims
	$claims = BCC_Login_Token_Utility::get_token_claims( $token );

	$birthdate = date_create($claims['birthdate']);
	$current_date = date_create();
	$diff = date_diff($birthdate, $current_date);
	$age = $diff->y;
	return $age <= dwjz_max_age;
}

function dwjz_not_allowed_to_view_page(){
	wp_die(
		sprintf(
			'%s<br><a href="%s">%s</a>',
			__( 'Sorry, you are not allowed to view this page.', 'bcc-login' ),
			site_url(),
			__( 'Go to the front page', 'bcc-login' )
		),
		__( 'Unauthorized' ),
		array(
			'response' => 401,
		)
	);
}