// functions.php — Gallery CPT registration
register_post_type( 'ai_image', [
  'labels'      => [ 'name' => 'AI Images' ],
  'public'      => true,
  'has_archive' => true,
  'supports'    => [ 'title', 'thumbnail', 'custom-fields' ],
  'rewrite'     => [ 'slug' => 'gallery' ],
] );

// Tier access filter
add_filter( 'the_content', 'cw_tier_gate_content' );
function cw_tier_gate_content( $content ) {
  if ( ! is_singular( 'ai_image' ) ) return $content;
  $tier = get_post_meta( get_the_ID(), '_access_tier', true );
  if ( $tier === 'vip' && ! cw_user_has_plan( 'vip' ) ) {
    return cw_locked_placeholder( 'VIP' );
  }
  return $content;
}

// Plan IDs defined in ProfilePress > Membership Plans
// Free:     plan_id = 1
// Standard: plan_id = 2  ($12/mo, Stripe)
// VIP:      plan_id = 3  ($29/mo, Stripe)

// Helper used throughout the theme
function cw_user_has_plan( $slug ) {
  if ( ! is_user_logged_in() ) return false;
  $map = [ 'free' => 1, 'standard' => 2, 'vip' => 3 ];
  return ppress_is_user_a_member_of_plan(
    get_current_user_id(), $map[ $slug ] ?? 1
  );
}