Support PayPal Express Checkout #27 (#46)

inc/class-wooviet-admin-page.php

@@ -239,6 +239,42 @@ class WooViet_Admin_Page {
 
                         </td>
                     </tr>
+                    <tr>
+                        <th scope="row"><?php printf( __( 'Support VND for <a href="%s">the PayPal Express Checkout gateway</a>', 'woo-viet' ), 'https://docs.woocommerce.com/document/paypal-express-checkout/' ) ?></th>
+                        <td>
+                            <input name="settings[vnd_paypal_express_checkout][enabled]" type="hidden" value="no">
+                            <input name="settings[vnd_paypal_express_checkout][enabled]" type="checkbox"
+                                   id="vnd_paypal_express_checkout" value="yes"
+								<?php if ( 'yes' == $settings['vnd_paypal_express_checkout']['enabled'] )
+									echo 'checked="checked"' ?>>
+                            <label for="vnd_paypal_express_checkout"><?php _e( 'Enabled', 'woo-viet' ) ?></label>
+
+                            <fieldset><br/>
+                                <select name="settings[vnd_paypal_express_checkout][currency]"
+                                        id="vnd_paypal_express_checkout_currency">
+									<?php
+									foreach ( $paypal_supported_currencies as $currency ) {
+
+										if ( strtoupper( $currency ) == $settings['vnd_paypal_express_checkout']['currency'] ) {
+											printf( '<option selected="selected" value="%1$s">%1$s</option>', $currency );
+										} else {
+											printf( '<option value="%1$s">%1$s</option>', $currency );
+										}
+
+									}
+									?>
+                                </select>
+                                <label for="vnd_paypal_express_checkout_currency"><?php _e( 'Select a PayPal supported currency (like USD, EUR, etc), which is used to convert VND prices', 'woo-viet' ) ?></label>
+                                <br/>
+                                <br/>
+
+                                <input name="settings[vnd_paypal_express_checkout][rate]" type="number" step="1" min="100"
+                                       id="vnd_paypal_express_checkout_rate" style="width: 70px;"
+                                       value="<?php echo $settings['vnd_paypal_express_checkout']['rate'] ?>"
+                                <label for="vnd_paypal_express_checkout_rate"><?php _e( 'Insert the exchange rate of this currency to VND', 'woo-viet' ) ?></label>
+                            </fieldset>
+                        </td>
+                    </tr>
                     </tbody>
                 </table>
 

inc/class-wooviet-vnd-paypal-express-checkout.php

@@ -0,0 +1,180 @@
+<?php
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * The class to add the support for VND when using the WooCommerce PayPal Express Checkout gateway
+ *
+ * @see https://docs.woocommerce.com/document/paypal-express-checkout/
+ *
+ * @author   Longkt
+ * @since    1.4
+ *
+ */
+class WooViet_VND_PayPal_Express_Checkout {
+
+	/**
+	 * @var int
+	 */
+	protected $ppec_exchange_rate;
+
+	/**
+	 * @var string
+	 */
+	protected $ppec_currency;
+
+	/**
+	 * @var string
+	 */
+	protected $ppec_description;
+
+	/**
+	 * WooViet_VND_PayPal_Express_Checkout constructor
+	 *
+	 * @param int $ppec_exchange_rate
+	 * @param string $ppec_currency
+	 */
+	public function __construct( $ppec_exchange_rate = 22770, $ppec_currency = 'USD' ) {
+
+		$this->ppec_exchange_rate = (int) $ppec_exchange_rate;
+		$this->ppec_currency      = $ppec_currency;
+
+		$this->ppec_description = sprintf( __( 'The prices will be converted to %1$s in the PayPal Express Checkout pages with the exchange rate %2$s.', 'woo-viet' ),
+					"<span style='color:red'> $this->ppec_currency</span>",
+					"<span style='color:red'> $this->ppec_currency / VND = $this->ppec_exchange_rate</span>"
+				);
+
+		// Match response currency of PayPal with local order
+		add_action( 'woocommerce_paypal_express_checkout_valid_ipn_request', array( $this, 'ppec_match_currency_order' ) );
+
+		// Add exchange rate before send request to PayPal
+		add_filter( 'woocommerce_paypal_express_checkout_request_body', array( $this, 'ppec_convert_prices' ) );
+
+		// Load the method to add the exchange rate info for this gateway
+		$this->ppec_exchange_rate_info();
+
+	}
+
+	/**
+	 * Match response currency from PayPal with the order
+	 * 
+	 * @param $posted_data
+	 */
+	public function ppec_match_currency_order( $posted_data ) {
+
+		if( $posted_data['mc_currency'] ) {
+			$posted_data['mc_currency'] = $order->get_currency();
+		}
+
+	}
+
+	/**
+	 * @param  $params
+	 * @return mixed
+	 */
+	public function ppec_convert_prices( $params ) {
+
+			if( isset( $params['PAYMENTREQUEST_0_CURRENCYCODE'] ) ) {
+
+				$params['PAYMENTREQUEST_0_CURRENCYCODE'] = $this->ppec_currency;
+
+				if( isset( $params['PAYMENTREQUEST_0_AMT'] ) ) {
+					$params['PAYMENTREQUEST_0_AMT'] = round( $params['PAYMENTREQUEST_0_AMT'] / $this->ppec_exchange_rate, 2 );
+				}
+
+				if( isset( $params['PAYMENTREQUEST_0_ITEMAMT'] ) ) {
+					$params['PAYMENTREQUEST_0_ITEMAMT'] = round( $params['PAYMENTREQUEST_0_ITEMAMT'] / $this->ppec_exchange_rate, 2 );
+				}
+				
+				if( isset( $params['PAYMENTREQUEST_0_SHIPPINGAMT'] ) ) {
+					$params['PAYMENTREQUEST_0_SHIPPINGAMT'] = round( $params['PAYMENTREQUEST_0_SHIPPINGAMT'] / $this->ppec_exchange_rate, 2 );
+				}
+
+				if( isset( $params['PAYMENTREQUEST_0_TAXAMT'] ) ) {
+					$params['PAYMENTREQUEST_0_TAXAMT'] = round( $params['PAYMENTREQUEST_0_TAXAMT'] / $this->ppec_exchange_rate, 2 );
+				}
+
+				if( isset( $params['PAYMENTREQUEST_0_SHIPDISCAMT'] ) ) {
+					$params['PAYMENTREQUEST_0_SHIPDISCAMT'] = round( $params['PAYMENTREQUEST_0_SHIPDISCAMT'] / $this->ppec_exchange_rate, 2 );
+				}
+
+				$count = 0;
+
+				while( isset( $params['L_PAYMENTREQUEST_0_AMT' . $count] ) ) {
+					$params['L_PAYMENTREQUEST_0_AMT' . $count] = round( $params['L_PAYMENTREQUEST_0_AMT' . $count] / $this->ppec_exchange_rate, 2 );
+					$count++;
+				}
+			}
+
+		return $params;
+
+	}
+
+	/**
+	 * Add the exchange rate info in the suitable locations before proceeding in the PayPal pages
+	 */
+	public function ppec_exchange_rate_info() {
+
+		// Check if "Checkout on cart page" is enabled.
+		if( 'yes' === wc_gateway_ppec()->settings->cart_checkout_enabled ) {
+			add_action( 'woocommerce_proceed_to_checkout', array( $this, 'add_ppec_button_exchange_rate_info' ), 30 );
+		}
+
+		// Check if "Checkout on Single Product" is enabled.
+		if( 'yes' === wc_gateway_ppec()->settings->checkout_on_single_product_enabled ) {
+			add_action( 'woocommerce_after_add_to_cart_form', array( $this, 'add_ppec_button_exchange_rate_info' ), 30 );
+		}
+
+		// Check if "Enable PayPal Credit" is enabled.
+		if( 'yes' === wc_gateway_ppec()->settings->credit_enabled ) {
+			add_filter( 'woocommerce_paypal_express_checkout_settings', array( $this, 'add_paypal_credit_exchange_rate_info' ), 11 );
+		}
+
+		// Add the exchange rate info for PPEC in Checkout page
+		add_filter( 'option_woocommerce_ppec_paypal_settings', array( $this, 'add_ppec_checkout_exchange_rate_info' ), 11 );
+
+	}
+
+	/**
+	 * Display the exchange rate info of PPEC in Cart and Single Product page
+	 */
+	public function add_ppec_button_exchange_rate_info() {
+
+		echo '<p class="ppec-exchange-rate-info">' . $this->ppec_description . '</p>';
+
+	}
+
+	/**
+	 * Display the exchange rate info of PP Credit in Checkout page
+	 * 
+	 * @param $value
+	 * @return mixed
+	 */
+	public function add_paypal_credit_exchange_rate_info( $value ) {
+
+		if ( ! is_admin() ) {
+			$value['description']['default'] .= '<br />';
+			$value['description']['default'] .= $this->ppec_description;
+		}
+
+		return $value;
+	}
+
+	/**
+	 * Display the exchange rate info of PPEC in Checkout page
+	 * 
+	 * @param $value
+	 * @return mixed
+	 */
+	public function add_ppec_checkout_exchange_rate_info( $value ) {
+
+		if ( ! is_admin() ) {
+			$value['description'] .= '<br />';
+			$value['description'] .= $this->ppec_description;
+		}
+		return $value;
+		
+	}
+
+}

woo-viet.php

@@ -64,6 +64,12 @@ class WooViet {
 			array(
 				'enabled' => 'yes',
 			),
+		'vnd_paypal_express_checkout' =>
+			array( 
+				'enabled' => 'yes',
+				'currency' => 'USD',
+				'rate'     => '22770',
+			),
 	);
 	/**
 	 * The properties to manage all classes under the "inc/" folder
@@ -76,6 +82,7 @@ class WooViet {
 	protected $Currency;
 	protected $VND_PayPal_Standard;
 	protected $Admin_Page;
+	protected $VND_PayPal_Express_Checkout;
 
 	/**
 	 * Setup class.
@@ -199,6 +206,15 @@ class WooViet {
 			);
 		}
 
+		// Check if "Support VND for the PayPal Express Checkout gateway" is enabled
+		if ( 'yes' == $settings['vnd_paypal_express_checkout']['enabled'] ) {
+			include( WOO_VIET_DIR . 'inc/class-wooviet-vnd-paypal-express-checkout.php' );
+			$this->VND_PayPal_Express_Checkout = new WooViet_VND_PayPal_Express_Checkout(
+				$settings['vnd_paypal_express_checkout']['rate'],
+				$settings['vnd_paypal_express_checkout']['currency']
+			);
+		}
+
 	}
 
 	/**