[WP All Import SVI Variations Gallery]

import-svi-variations-gallery-images.md

This example snippet assumes you're importing variations with a "color" attribute. You will need to adjust it if that's not the case for your products.

function wpai_image_imported( $post_id, $att_id, $filepath, $is_keep_existing_images = '' ) {
	$product = wc_get_product( $post_id );
	if ( ! $product ) return;
	$parent_id = $product->get_parent_id();
	if ( empty( $parent_id ) ) return;
	$parent = wc_get_product( $parent_id );
	if ( ! $parent ) return;

	$existing = $parent->get_meta( 'woosvi_slug', true );
	if ( empty( $existing ) ) {
		$existing = array();
	} else {
		$existing = maybe_unserialize( $existing );
	}

	$slug = wc_sanitize_taxonomy_name( $product->get_attribute( 'color' ) );
	$key  = ( empty( $existing ) ) ? 0 : ( count( $existing ) + 1 );
	
	if ( ! empty( $existing ) ) {
		foreach ( $existing as $ikey => $value ) {
			if ( $value['slugs'][0] == $slug ) {
				$key = $ikey;
				break;
			}
		}
	}
	
	$existing[ $key ]['slugs'][0] = $slug;
	$existing[ $key ]['imgs'][]   = $att_id;
	$parent->update_meta_data( 'woosvi_slug', $existing );
	$parent->save();
}
add_action( 'pmxi_gallery_image', 'wpai_image_imported', 10, 4 );