Wishlist Integration - Changes Over time.

file.php

<?php

/** 13 Sep 2016
 * @param $user_id
 * @param $post_id
 * @param string $post_type
 * @return bool
 */
 function member_can_access($user_id, $post_id, $post_type = 'courses') {
  if( !function_exists( 'wlmapi_get_member_levels' ) )
    return true;

  @$levels = array_keys( wlmapi_get_member_levels($user_id) );

  if( !is_array( $levels ) )
    return false;

  if( empty( $levels ) )
    return false;

  global $WishListMemberInstance;

  @$content_levels = $WishListMemberInstance->GetContentLevels( $post_type, $post_id );

  if( !is_array( $content_levels ) )
    return true;

  $intersection = array_intersect( $levels, $content_levels );

  if( empty( $intersection ) )
    return false;

  return true;
}

/** 10 May 2017
 * @param $user_id
 * @param $post_id
 * @return bool
 */
function member_can_access($user_id, $post_id ) {
  if( !function_exists( 'wlmapi_get_member_levels' ) )
    return true;

  @$levels = array_keys( wlmapi_get_member_levels($user_id) );

  if( !is_array( $levels ) )
    return false;

  if( empty( $levels ) )
    return false;

  global $WishListMemberInstance;

  @$content_levels = $WishListMemberInstance->GetContentLevels( $post_type, $post_id );

  if( !is_array( $content_levels ) )
    return true;

  if( empty( $content_levels ) )
    return true;

  $intersection = array_intersect( $levels, $content_levels );

  if( empty( $intersection ) )
    return false;

  return true;
}

/**
 * 27 Aug 2018 - used within Wishlist Integration ( released version )
 * @param $user_id
 * @param $post_id
 * @return bool
 */
public function member_can_access($user_id, $post_id ) {
  if( function_exists( 'wlmapi_member_can_access' ) )
    return wlmapi_member_can_access( $user_id, get_post_type( $post_id ), $post_id );

  @$levels = array_keys( wlmapi_get_member_levels($user_id) );

  if( !is_array( $levels ) )
    return false;

  if( empty( $levels ) )
    return false;

  global $WishListMemberInstance;

  @$content_levels = $WishListMemberInstance->GetContentLevels( get_post_type( $post_id ), $post_id );

  if( !is_array( $content_levels ) )
    return true;

  if( empty( $content_levels ) )
    return true;

  $intersection = array_intersect( $levels, $content_levels );

  if( empty( $intersection ) )
    return false;

  return true;
}

/**
 * 27 Aug 2018 - the only code required to actually work, but we had to support older versions too.
 * @param $user_id
 * @param $post_id
 * @return bool
 */
public function member_can_access($user_id, $post_id ) {
   return wlmapi_member_can_access( $user_id, get_post_type( $post_id ), $post_id );
}