products.json
[
  {
    "product_id": 109,
    "type": "simple",
	"sku": "109",
    "name": "Нов продукт 16",
    "description": "Опис за новиот продукт 16",
    "regular_price": 150,
	"sale_price": "",
	"categories": [
              "Активна Мрежна опрема",
              "Безжична опрема / WiFi",
              "WiFi"
            ],

    "manage_stock": 1,
    "stock": 10,
    "has_variations": 0,
	"image": "http://localhost/photo/TL-SF1008D-03.jpg"
  }
]
import.php
<?php

define( 'FILE_TO_IMPORT', 'products.json' );

require __DIR__ . '/vendor/autoload.php';

use Automattic\WooCommerce\Client;
use Automattic\WooCommerce\HttpClient\HttpClientException;

if ( ! file_exists( FILE_TO_IMPORT ) ) :
	die( 'Unable to find ' . FILE_TO_IMPORT );
endif;

$woocommerce = new Client(
    'http://localhost/trinity-prodavnica',
    'ck_02221db3d0fb049678344979bfa8b4733c020a52',
    'cs_6a865eb19be1d6ed5fd758ebab5b998486cd6d60',
    [
        'wp_api' => true,
        'version' => 'wc/v2',
       // 'query_string_auth' => true
    ]
);

try {

	$json = parse_json( FILE_TO_IMPORT );

	// Import Attributes
	foreach ( get_attributes_from_json( $json ) as $product_attribute_name => $product_attribute ) :

		$attribute_data = array(
		    'name' => $product_attribute_name,
		    'slug' => 'pa_' . strtolower( $product_attribute_name ),
		    'type' => 'select',
		    'order_by' => 'menu_order',
		    'has_archives' => true
		);

		$wc_attribute = $woocommerce->post( 'products/attributes', $attribute_data );

		if ( $wc_attribute ) :
			status_message( 'Attribute added. ID: '. $wc_attribute['id'] );

			// store attribute ID so that we can use it later for creating products and variations
			$added_attributes[$product_attribute_name]['id'] = $wc_attribute['id'];

			// Import: Attribute terms
			foreach ( $product_attribute['terms'] as $term ) :

				$attribute_term_data = array(
					'name' => $term
				);

				$wc_attribute_term = $woocommerce->post( 'products/attributes/'. $wc_attribute['id'] .'/terms', $attribute_term_data );

				if ( $wc_attribute_term ) :
					status_message( 'Attribute term added. ID: '. $wc_attribute['id'] );

					// store attribute terms so that we can use it later for creating products
					$added_attributes[$product_attribute_name]['terms'][] = $term;
				endif;

			endforeach;

		endif;

	endforeach;


	$data = get_products_and_variations_from_json( $json, $added_attributes );

	// Merge products and product variations so that we can loop through products, then its variations
	$product_data = merge_products_and_variations( $data['products'], $data['product_variations'] );

	// Import: Products
	foreach ( $product_data as $k => $product ) :

		if ( isset( $product['variations'] ) ) :
			$_product_variations = $product['variations']; // temporary store variations array

			// Unset and make the $product data correct for importing the product.
			unset($product['variations']);
		endif;

			$wc_product = $woocommerce->post( 'products', $product );

			//if ( $wc_product ) :
				//status_message( 'Product added. ID: '. $wc_product['id'] );
			//endif;

		if ( isset( $_product_variations ) ) :
			// Import: Product variations

			// Loop through our temporary stored product variations array and add them
			foreach ( $_product_variations as $variation ) :
				$wc_variation = $woocommerce->post( 'products/'. $wc_product['id'] .'/variations', $variation );

				if ( $wc_variation ) :
					status_message( 'Product variation added. ID: '. $wc_variation['id'] . ' for product ID: ' . $wc_product['id'] );
				endif;
			endforeach;

			// Don't need it anymore
			unset($_product_variations);
		endif;

	endforeach;


} catch ( HttpClientException $e ) {
    echo $e->getMessage(); // Error message
}

/**
 * Merge products and variations together.
 * Used to loop through products, then loop through product variations.
 *
 * @param  array $product_data
 * @param  array $product_variations_data
 * @return array
*/
function merge_products_and_variations( $product_data = array(), $product_variations_data = array() ) {
	foreach ( $product_data as $k => $product ) :
		foreach ( $product_variations_data as $k2 => $product_variation ) :
			if ( $product_variation['_parent_product_id'] == $product['_product_id'] ) :

				// Unset merge key. Don't need it anymore
				unset($product_variation['_parent_product_id']);

				$product_data[$k]['variations'][] = $product_variation;

			endif;
		endforeach;

		// Unset merge key. Don't need it anymore
		unset($product_data[$k]['_product_id']);
	endforeach;

	return $product_data;
}

/**
 * Get products from JSON and make them ready to import according WooCommerce API properties.
 *
 * @param  array $json
 * @param  array $added_attributes
 * @return array
*/
function get_products_and_variations_from_json( $json, $added_attributes ) {

	$product = array();
	$product_variations = array();

	foreach ( $json as $key => $pre_product ) :

		if ( $pre_product['type'] == 'simple' ) :
		if ( $pre_product['image'] ) {
			$product[$key]['images'][] = array(
			  'src' => (string) $pre_product['image'],
			  'position' => 0
			);
		}


			$product[$key]['_product_id'] = (string) $pre_product['product_id'];

			$product[$key]['name'] = (string) $pre_product['name'];
			$product[$key]['sku'] = (string) $pre_product['sku'];
			$product[$key]['description'] = (string) $pre_product['description'];
			$product[$key]['regular_price'] = (string) $pre_product['regular_price'];
			$product[$key]['sale_price'] = (string) $pre_product['sale_price'];

			// Adding selected categories
			function get_product_categories_from_json ($json){
			$product_categories = array();
			$cats = array();

            foreach($product_categories as $c){
                $cat = get_category( $c );
                $cats[] = array( 'name' => $cat->name, 'slug' => $cat->slug );
			}
}
			$product_categories = get_product_categories_from_json( $product[$key] );

            $product[$key]['cats'] = (array) $pre_product['categories'];



			// Stock
			$product[$key]['manage_stock'] = (bool) $pre_product['manage_stock'];

			if ( $pre_product['stock'] > 0 ) :
				$product[$key]['in_stock'] = (bool) true;
				$product[$key]['stock_quantity'] = (int) $pre_product['stock'];
			else :
				$product[$key]['in_stock'] = (bool) false;
				$product[$key]['stock_quantity'] = (int) 0;
			endif;

		elseif ( $pre_product['type'] == 'variable' ) :
			$product[$key]['_product_id'] = (string) $pre_product['product_id'];

			$product[$key]['type'] = 'variable';
			$product[$key]['name'] = (string) $pre_product['name'];
			$product[$key]['description'] = (string) $pre_product['description'];
			$product[$key]['regular_price'] = (string) $pre_product['regular_price'];

			// Stock
			$product[$key]['manage_stock'] = (bool) $pre_product['manage_stock'];

			if ( $pre_product['stock'] > 0 ) :
				$product[$key]['in_stock'] = (bool) true;
				$product[$key]['stock_quantity'] = (int) $pre_product['stock'];
			else :
				$product[$key]['in_stock'] = (bool) false;
				$product[$key]['stock_quantity'] = (int) 0;
			endif;

			$attribute_name = $pre_product['attribute_name'];

			$product[$key]['attributes'][] = array(
					'id' => (int) $added_attributes[$attribute_name]['id'],
					'name' => (string) $attribute_name,
					'position' => (int) 0,
					'visible' => true,
					'variation' => true,
					'options' => $added_attributes[$attribute_name]['terms']
			);

		elseif ( $pre_product['type'] == 'product_variation' ) :

			$product_variations[$key]['_parent_product_id'] = (string) $pre_product['parent_product_id'];

			$product_variations[$key]['description'] = (string) $pre_product['description'];
			$product_variations[$key]['regular_price'] = (string) $pre_product['regular_price'];

			// Stock
			$product_variations[$key]['manage_stock'] = (bool) $pre_product['manage_stock'];

			if ( $pre_product['stock'] > 0 ) :
				$product_variations[$key]['in_stock'] = (bool) true;
				$product_variations[$key]['stock_quantity'] = (int) $pre_product['stock'];
			else :
				$product_variations[$key]['in_stock'] = (bool) false;
				$product_variations[$key]['stock_quantity'] = (int) 0;
			endif;

			$attribute_name = $pre_product['attribute_name'];
			$attribute_value = $pre_product['attribute_value'];

			$product_variations[$key]['attributes'][] = array(
				'id' => (int) $added_attributes[$attribute_name]['id'],
				'name' => (string) $attribute_name,
				'option' => (string) $attribute_value
			);

		endif;
	endforeach;

	$data['products'] = $product;
	$data['product_variations'] = $product_variations;

	return $data;
}

/**
 * Get attributes and terms from JSON.
 * Used to import product attributes.
 *
 * @param  array $json
 * @return array
*/


function get_attributes_from_json( $json ) {
	$product_attributes = array();

	foreach( $json as $key => $pre_product ) :
		if ( !empty( $pre_product['attribute_name'] ) && !empty( $pre_product['attribute_value'] ) ) :
			$product_attributes[$pre_product['attribute_name']]['terms'][] = $pre_product['attribute_value'];
		endif;
	endforeach;

	return $product_attributes;

}


/**
 * Parse JSON file.
 *
 * @param  string $file
 * @return array
*/
function parse_json( $file ) {
	$json = json_decode( file_get_contents( $file ), true );

	if ( is_array( $json ) && !empty( $json ) ) :
		return $json;
	else :
		die( 'An error occurred while parsing ' . $file . ' file.' );

	endif;
}

/**
 * Print status message.
 *
 * @param  string $message
 * @return string
*/
function status_message( $message ) {
	echo $message . "\r\n";
}