WooCommerce Product Collections

hello.php

<?php
/*
Plugin Name: WooCommerce Product Collections
Plugin URI: http://upnrunn.com
Description: Set WooCommerce Product Collections based on Price range
Author: Kishore Sahoo
Version: 0.0.1
Author URI: http://upnrunn.com
*/

add_action( 'woocommerce_init', 'woocommerce_collections_init' );

function woocommerce_collections_init() {
	$labels = [
		'name'                       => esc_html__( 'Collections', 'wc-product-collections' ),
		'singular_name'              => esc_html__( 'Collection', 'wc-product-collections' ),
		'menu_name'                  => esc_html__( 'Collections', 'wc-product-collections' ),
		'all_items'                  => esc_html__( 'All Collections', 'wc-product-collections' ),
		'edit_item'                  => esc_html__( 'Edit Collection', 'wc-product-collections' ),
		'view_item'                  => esc_html__( 'View Collection', 'wc-product-collections' ),
		'update_item'                => esc_html__( 'Update Collection', 'wc-product-collections' ),
		'add_new_item'               => esc_html__( 'Add New Collection', 'wc-product-collections' ),
		'new_item_name'              => esc_html__( 'New Collection Name', 'wc-product-collections' ),
		'parent_item'                => esc_html__( 'Parent Collection', 'wc-product-collections' ),
		'parent_item_colon'          => esc_html__( 'Parent Collection:', 'wc-product-collections' ),
		'search_items'               => esc_html__( 'Search Collections', 'wc-product-collections' ),
		'popular_items'              => esc_html__( 'Popular Collections', 'wc-product-collections' ),
		'back_to_items'              => esc_html__( '&larr; Go to Collections', 'wc-product-collections' ),
		'separate_items_with_commas' => esc_html__( 'Separate collections with commas', 'wc-product-collections' ),
		'add_or_remove_items'        => esc_html__( 'Add or remove collections', 'wc-product-collections' ),
		'choose_from_most_used'      => esc_html__( 'Choose from the most used collections', 'wc-product-collections' ),
		'not_found'                  => esc_html__( 'No collections found', 'wc-product-collections' )
	];

	$args = [
		'hierarchical'       => true,
		'labels'             => $labels,
		'show_ui'            => true,
		'query_var'          => true,
		'public'             => true,
		'publicly_queryable' => true,
		'show_in_menu'       => true,
		'show_in_rest'       => true,
		'show_admin_column'  => true,
		'rewrite'            => [
			'slug'         => apply_filters( 'wc_product_taxonomy_slug', 'collections' ),
			'hierarchical' => true,
			'with_front'   => apply_filters( 'wc_product_taxonomy_with_front', true )
		]
	];

	register_taxonomy( 'collections', [ 'product' ], $args );
}


add_action( 'collections_add_form_fields', 'add_term_fields' );
add_action( 'collections_edit_form_fields', 'edit_form_fields', 10, 2 );
//add_action( 'edit_collections', [ $this, 'save_form_fields' ] );
//add_action( 'create_collections', [ $this, 'save_form_fields' ] );



function add_term_fields( $taxonomy ) {
	?>
		<div class="form-field">
			<label for="price_range">Price Range</label>
			<input type="number" name="price_range" id="price_range" />
			<p>Put a price like Under 900</p>
		</div>
	<?php
	
	
}


function wpdocs_product_meta( $post_id ) {
	// Check the logged in user has permission to edit this post
	if ( ! current_user_can( 'manage_options' ) ) {
		return $post_id;
	}

	$term_id = 30; // term id: change it 

	// get meta data value
	$price_range = get_term_meta( $term_id, 'price_range', true );
	

	$IDs = get_ids_on_price_range($price_range);

	//print_r($IDs);

	foreach ($IDs as $key => $value) {
		// code...
		wp_set_post_terms( $value, $term_id, 'collections' );
	}
	//die;
}
add_action( 'save_post_product', 'wpdocs_product_meta' );


function edit_form_fields( $term, $taxonomy ) {

	// get meta data value
	$price_range = get_term_meta( $term->term_id, 'price_range', true );
	

	?><tr class="form-field">
		<th><label for="price_range">Price Range</label></th>
		<td>
			<input name="price_range" id="price_range" type="number" value="<?php echo esc_attr( $price_range ) ?>" />
			<p>Put a price like Under 900</p>
		</td>
	</tr>
<?php
}

add_action( 'created_collections', 'rudr_save_term_fields' );
add_action( 'edited_collections', 'rudr_save_term_fields' );
function rudr_save_term_fields( $term_id ) {
	
	update_term_meta(
		$term_id,
		'price_range',
		sanitize_text_field( $_POST[ 'price_range' ] )
	);
	
}


function get_ids_on_price_range($value='100')
{
	$IDs = array();
	$query = array(
	    'post_status' => 'publish',
	    'post_type' => 'product',
	    'posts_per_page' => 99999999,
	    'meta_query' => array(
	        array(
	            'key' => '_price',
	            'value' => array(0, $value),
	            'compare' => 'BETWEEN',
	            'type' => 'NUMERIC'
	        )
	    )
	);

	$wpquery = new WP_Query($query); // return 10 products within the price range 50 - 100
	foreach ($wpquery->posts as $key => $value) {
		$IDs[] = $value->ID;
	}
	return $IDs;

}