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- /**
- * Helper class to allow 3rd party plugins to implement multi-currency
- * capabilities. The class was designed to work with the Aelia Currency Switcher,
- * but it's generic enough to be adapted to other solutions.
- *
- * Need a consultation? Find us on Codeable: https://bit.ly/aelia_codeable
- *
- * @author Aelia <support@aelia.co>
- * @link https://aelia.co
- * @link https://aelia.co/shop/currency-switcher-woocommerce/
- */
- class Advanced_CurrencySwitcher_Integration {
- // @var string Shop's base currency. Used for caching.
- protected static $_base_currency;
- /**
- * Returns shop's base currency. This method implements some simple caching,
- * to avoid calling get_option() too many times.
- *
- * @return string Shop's base currency.
- */
- protected static function shop_base_currency() {
- if(empty(self::$_base_currency)) {
- self::$_base_currency = get_option('woocommerce_currency');
- }
- return self::$_base_currency;
- }
- /**
- * Returns the list of the currencies enabled in the Aelia Currency Switcher.
- * If the Currency Switcher is not installed, or active, then the list will
- * only contain the shop base currency.
- *
- * @return array An array of currency codes.
- */
- public static function enabled_currencies() {
- return apply_filters('wc_aelia_cs_enabled_currencies', array(self::shop_base_currency()));
- }
- /**
- * Returns a product's base currency. A product's base currency is the point
- * of reference to calculate other prices, and it can differ from shop's base
- * currency.
- * For example, if a shop's base currency is USD, a product's base currency
- * can be EUR. In such case, product prices in other currencies can be
- * calculated automatically, as long as the EUR one is entered.
- *
- * @param int product_id A product ID.
- * @param string default_currency The default currency to use if the product
- * doesn't have a base currency.
- * @return string A currency code.
- */
- public static function get_product_base_currency($product_id, $default_currency = null) {
- if(empty($default_currency)) {
- $default_currency = self::shop_base_currency();
- }
- return apply_filters('wc_aelia_cs_product_base_currency', $default_currency, $product_id);
- }
- /**
- * Advanced integration with WooCommerce Currency Switcher, developed by Aelia
- * (https://aelia.co). This method can be used by any 3rd party plugin to
- * return prices in the active currency.
- *
- * @param double price The source price.
- * @param string to_currency The target currency. If empty, the active currency
- * is taken.
- * @param string from_currency The source currency. If empty, WooCommerce base
- * currency is taken.
- * @return double The price converted from source to destination currency.
- */
- public static function get_price_in_currency($price, $to_currency = null, $from_currency = null) {
- if(empty($from_currency)) {
- $from_currency = self::shop_base_currency();
- }
- if(empty($to_currency)) {
- $to_currency = get_woocommerce_currency();
- }
- return self::convert($price, $to_currency, $from_currency);
- }
- /**
- * Converts an amount from one currency to another, using exchange rates.
- *
- * @param float amount The amount to convert.
- * @param string to_currency The destination currency.
- * @param string from_currency The source currency.
- * @return float The amount converted to the target destination currency.
- */
- public static function convert($amount, $to_currency, $from_currency = null) {
- return apply_filters('wc_aelia_cs_convert', $amount, $from_currency, $to_currency);
- }
- /**
- * Returns a list of prices that should be a applied to a product for each currency.
- * This is a example of how the fixed-price logic could be implemented. The
- * actual implementation depends on the specifics of the product being proceseed,
- * on how the prices were stored, and so on.
- *
- * @param WC_Product product The product for which the prices should be retrieved.
- * @param string currency The currency for which the product prices will be retrieved.
- * @return array An array of prices.
- */
- protected function get_product_prices_for_currency($product, $currency) {
- // Load the custom prices in the specified currency
- $prices = array(
- 'my_custom_price' => get_post_meta($product->id, '_my_custom_price_' . $currency, true),
- 'my_other_custom_price' => get_post_meta($product->id, 'my_other_custom_price_' . $currency, true),
- );
- return $prices;
- }
- /**
- * Performs a simple test conversion of an arbitrary value, using exchange
- * rates.
- */
- public function test() {
- $price = 123;
- // Just call the get_price_in_currency() method. This will use automatic conversion
- return self::get_price_in_currency($price);
- }
- /**
- * Alter the callbacks used by the Currency Switcher, replacing the callback
- * for a "my_custom_product" type with a custon one.
- *
- * @param callable convert_callback The original callback.
- * @param WC_Product product The callback being converted.
- * @return callable The callback that will convert the product's prices.
- */
- public function wc_aelia_currencyswitcher_product_convert_callback($convert_callback, $product) {
- if($product->product_type === 'my_custom_product') {
- $convert_callback = array($this, 'convert_my_custom_product');
- }
- return $convert_callback;
- }
- /**
- * Converts the prices of a custom product to the specified currency.
- *
- * @param WC_Product product A variable product.
- * @param string currency A currency code.
- * @return WC_Product The product with converted prices.
- */
- public function convert_my_custom_product($product, $currency) {
- /* Here you can implement your custom logic to convert the prices.
- * The two lines below are just an example. Here you can do anything you
- * want with the product, to ensure that its prices are converted correctly.
- */
- // Load the product prices that were entered manually for the specified currency
- $product_prices_for_currency = $this->get_product_prices_for_currency($product, $currency);
- // If prices were entered manually, then they will be used as they are. If not,
- // product's price in base currency will be converted using exchange rates
- $product->my_custom_price = isset($product_prices_for_currency['my_custom_price']) ? $product_prices_for_currency['my_custom_price'] : self::get_price_in_currency($product->my_custom_price);
- $product->my_other_custom_price = isset($product_prices_for_currency['my_other_custom_price']) ? $product_prices_for_currency['my_other_custom_price'] : self::get_price_in_currency($product->my_other_custom_price);
- return $product;
- }
- public function __construct() {
- add_filter('wc_aelia_currencyswitcher_product_convert_callback', array($this, 'wc_aelia_currencyswitcher_product_convert_callback'), 10, 2);
- }
- }
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