Custom post / page restriction messages in Restrict Content Pro

rcp-custom-post-restriction-messages.php

/**
 * This plugin adds support for custom restriction messages per post.
 * If a custom message exists, it is used in place of the ones defined
 * in the RCP settings under Restrict > Settings > General.
 */

/**
 * Displays the custom message metabox on the post edit screen.
 */
function jp_rcp_post_level_restriction_message_metabox() {

	global $post;
	$content = get_post_meta( $post->ID, 'rcp_post_level_restriction_message', true );
	?>

	<hr>

	<div class="rcp-metabox-field">
		<p><strong><?php _e( 'Override restricted content messages for this post.', 'rcp' ); ?></strong></p>
		<p>
			<label for="rcp_post_level_restriction_message">
				<?php wp_editor( $content, 'rcp_post_level_restriction_message', array( 'drag_drop_upload' => true ) ); ?>
			</label>
		</p>
	</div>
	<?php
	wp_nonce_field( 'rcp_post_level_restriction_message_nonce', 'rcp_post_level_restriction_message_nonce' );
}
add_action( 'rcp_metabox_fields_after', 'jp_rcp_post_level_restriction_message_metabox' );

/**
 * Saves the custom message on the post edit screen.
 */
function jp_rcp_save_post_level_restriction_message( $post_id, $post ) {

	if ( empty( $_POST['rcp_post_level_restriction_message_nonce'] ) || ! wp_verify_nonce( $_POST['rcp_post_level_restriction_message_nonce'], 'rcp_post_level_restriction_message_nonce' ) ) {
		return;
	}

	if ( ! current_user_can( 'edit_post', $post_id ) ) {
		return;
	}

	if ( empty( $_POST['rcp_post_level_restriction_message'] ) ) {
		delete_post_meta( $post_id, 'rcp_post_level_restriction_message' );
		return;
	}

	update_post_meta( $post_id, 'rcp_post_level_restriction_message', wp_kses_post( $_POST['rcp_post_level_restriction_message'] ) );
}
add_action( 'save_post', 'jp_rcp_save_post_level_restriction_message', 10, 2 );

/**
 * Overrides the restricted message if a custom one exists for the current post.
 */
function jp_rcp_restricted_message_override( $message ) {

	global $post;

	$custom = get_post_meta( $post->ID, 'rcp_post_level_restriction_message', true );

	if ( ! empty( $custom ) ) {
		return $custom;
	}

	return $message;

}
add_filter( 'rcp_restricted_message', 'jp_rcp_restricted_message_override' );

Dude, this is fabulous. Thank you.

Doesn't look like the metabox here runs shortcodes, and it would be awesome to run RCPs native shortcodes to be able to show different restriction messages depending on user's memebership status. Any tips for adding shortcode functionality to the metabox?