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David Stone
2024-11-30 18:24:12 -07:00
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<?php
/**
* Base Gateway.
*
* Base Gateway class. Should be extended to add new payment gateways.
*
* @package WP_Ultimo
* @subpackage Managers/Site_Manager
* @since 2.0.0
*/
namespace WP_Ultimo\Gateways;
// Exit if accessed directly
defined('ABSPATH') || exit;
/**
* Base Gateway class. Should be extended to add new payment gateways.
*
* For more info on actual implementations,
* check the Gateway_Manual class and the Gateway_Stripe class.
*
* @since 2.0.0
*/
abstract class Base_Gateway {
/**
* The gateway ID.
*
* A simple string that the class should set.
* e.g. stripe, manual, paypal, etc.
*
* @since 2.0.0
* @var string
*/
protected $id;
/**
* Allow gateways to declare multiple additional ids.
*
* These ids can be retrieved alongside the main id,
* via the method get_all_ids().
*
* This is useful when dealing with different gateway implementations
* that share the same base code, or that have code that is applicable
* to other gateways.
*
* A classical example is the way Stripe is setup on WP Ultimo now:
* - We have two stripe gateways - stripe and stripe-checkout;
* - Both of those gateways inherit from class-base-stripe-gateway.php,
* which deals with appending the remote gateway links to the admin panel,
* for example.
* - The problem arises when the hooks are id-bound. If you have customer
* that signup via stripe and later on you deactivate stripe in favor of
* stripe-checkout, the admin panel links will stop working, as the hooks
* are only triggered for stripe-checkout integrations, and old memberships
* have stripe as the gateway.
* - If you declare the other ids here, the hooks will be loaded for the
* other gateways, and that will no longer be a problem.
*
* @since 2.0.7
* @var array
*/
protected $other_ids = array();
/**
* The order cart object.
*
* @since 2.0.0
* @var \WP_Ultimo\Checkout\Cart
*/
protected $order;
/**
* The customer.
*
* @since 2.0.0
* @var \WP_Ultimo\Models\Customer
*/
protected $customer;
/**
* The membership.
*
* @since 2.0.0
* @var \WP_Ultimo\Models\Membership
*/
protected $membership;
/**
* The payment.
*
* @since 2.0.0
* @var \WP_Ultimo\Models\Payment
*/
protected $payment;
/**
* The URL to return.
*
* @since 2.1
* @var string
*/
protected $return_url;
/**
* The cancel URL.
*
* @since 2.1
* @var string
*/
protected $cancel_url;
/**
* The confirm URL.
*
* @since 2.1
* @var string
*/
protected $confirm_url;
/**
* The discount code, if any.
*
* @since 2.0.0
* @var null|\WP_Ultimo\Models\Discount_Code
*/
protected $discount_code;
/**
* Backwards compatibility for the old notify ajax url.
*
* @since 2.0.4
* @var bool|string
*/
protected $backwards_compatibility_v1_id = false;
/**
* Initialized the gateway.
*
* @since 2.0.0
* @param null|\WP_Ultimo\Checkout\Cart $order A order cart object.
*/
public function __construct($order = null) {
/*
* Loads the order, if any
*/
$this->set_order($order);
/*
* Calls the init code.
*/
$this->init();
} // end __construct;
/**
* Sets an order.
*
* Useful for loading the order on a later
* stage, where the gateway object might
* have been already instantiated.
*
* @since 2.0.0
*
* @param \WP_Ultimo\Checkout\Cart $order The order.
* @return void
*/
public function set_order($order) {
if ($order === null) {
return;
} // end if;
/*
* The only thing we do is to set the order.
* It contains everything we need.
*/
$this->order = $order;
/*
* Based on the order, we set the other
* useful parameters.
*/
$this->customer = $this->order->get_customer();
$this->membership = $this->order->get_membership();
$this->payment = $this->order->get_payment();
$this->discount_code = $this->order->get_discount_code();
} // end set_order;
/**
* Returns the id of the gateway.
*
* @since 2.0.0
* @return string
*/
public final function get_id() {
return $this->id;
} // end get_id;
/*
* Required Methods.
*
* The methods below are mandatory.
* You need to have them on your Gateway implementation
* even if they do nothing.
*/
/**
* Process a checkout.
*
* It takes the data concerning
* a new checkout and process it.
*
* Here's where you will want to send
* API calls to the gateway server,
* set up recurring payment profiles, etc.
*
* This method is required and MUST
* be implemented by gateways extending the
* Base_Gateway class.
*
* @since 2.0.0
*
* @param \WP_Ultimo\Models\Payment $payment The payment associated with the checkout.
* @param \WP_Ultimo\Models\Membership $membership The membership.
* @param \WP_Ultimo\Models\Customer $customer The customer checking out.
* @param \WP_Ultimo\Checkout\Cart $cart The cart object.
* @param string $type The checkout type. Can be 'new', 'retry', 'upgrade', 'downgrade', 'addon'.
* @return bool
*/
abstract public function process_checkout($payment, $membership, $customer, $cart, $type);
/**
* Process a cancellation.
*
* It takes the data concerning
* a membership cancellation and process it.
*
* Here's where you will want to send
* API calls to the gateway server,
* to cancel a recurring profile, etc.
*
* This method is required and MUST
* be implemented by gateways extending the
* Base_Gateway class.
*
* @since 2.0.0
*
* @param \WP_Ultimo\Models\Membership $membership The membership.
* @param \WP_Ultimo\Models\Customer $customer The customer checking out.
* @return bool|\WP_Error
*/
abstract public function process_cancellation($membership, $customer);
/**
* Process a refund.
*
* It takes the data concerning
* a refund and process it.
*
* Here's where you will want to send
* API calls to the gateway server,
* to issue a refund.
*
* This method is required and MUST
* be implemented by gateways extending the
* Base_Gateway class.
*
* @since 2.0.0
*
* @param float $amount The amount to refund.
* @param \WP_Ultimo\Models\Payment $payment The payment associated with the checkout.
* @param \WP_Ultimo\Models\Membership $membership The membership.
* @param \WP_Ultimo\Models\Customer $customer The customer checking out.
* @return bool
*/
abstract public function process_refund($amount, $payment, $membership, $customer);
/*
* Optional Methods.
*
* The methods below are good to have,
* but are not mandatory.
*
* You can implement the ones you need only.
* The base class provides defaults so you
* don't have to worry about the ones you
* don't need.
*/
/**
* Initialization code.
*
* This method gets called by the constructor.
* It is a good chance to set public properties to the
* gateway object and run preparations.
*
* For example, it's here that the Stripe Gateway
* sets its sandbox mode and API keys
*
* @since 2.0.0
* @return void
*/
public function init() {} // end init;
/**
* Adds Settings.
*
* This method allows developers to use
* WP Ultimo apis to add settings to the settings
* page.
*
* Gateways can use wu_register_settings_field
* to register API key fields and other options.
*
* @since 2.0.0
* @return void
*/
public function settings() {} // end settings;
/**
* Checkout fields.
*
* This method gets called during the printing
* of the gateways section of the payment page.
*
* Use this to add the pertinent fields to your gateway
* like credit card number fields, for example.
*
* @since 2.0.0
* @return void
*/
public function fields() {} // end fields;
/**
* Declares support for recurring payments.
*
* Not all gateways support the creation of
* automatically recurring payments.
*
* For those that don't, we need to manually
* create pending payments when the time comes
* and we use this declaration to decide that.
*
* If your gateway supports recurring payments
* (like Stripe or PayPal, for example)
* override this method to return true instead.
*
* @since 2.0.0
* @return bool
*/
public function supports_recurring() {
return false;
} // end supports_recurring;
/**
* Declares support for free trials.
*
* WP Ultimo offers to ways of dealing with free trials:
* (1) By asking for a payment method upfront; or
* (2) By not asking for a payment method until the trial is over.
*
* If you go the second route, WP Ultimo uses
* the free gateway to deal with the first payment (which will be 0)
*
* If you go the first route, though, the payment gateway
* must be able to handle delayed first payments.
*
* If that's the case for your payment gateway,
* override this method to return true.
*
* @since 2.0.0
* @return bool
*/
public function supports_free_trials() {
return false;
} // end supports_free_trials;
/**
* Declares support for recurring amount updates.
*
* Some gateways can update the amount of a recurring
* payment. For example, Stripe allows you to update
* the amount of a subscription.
*
* If your gateway supports this, override this
* method to return true. You will also need to
* implement the process_membership_update() method.
*
* @since 2.1.2
* @return bool
*/
public function supports_amount_update() {
return false;
} // end supports_amount_update;
/**
* Handles payment method updates.
*
* @since 2.0.0
* @return void
*/
public function update_payment_method() {} // end update_payment_method;
/**
* Defines a public title.
*
* This is useful to be able to define a nice-name
* for a gateway that will make more sense for customers.
*
* Stripe, for example, sets this value to 'Credit Card'
* as showing up simply as Stripe would confuse customers.
*
* By default, we use the title passed when calling
* wu_register_gateway().
*
* @since 2.0.0
* @return string
*/
public function get_public_title() {
$gateways = wu_get_gateways();
$registered_gateway = wu_get_isset($gateways, $this->get_id());
if (!$registered_gateway) {
$default = $this->get_id();
$default = str_replace('-', ' ', $default);
return ucwords($default);
} // end if;
return $registered_gateway['title'];
} // end get_public_title;
/**
* Adds additional hooks.
*
* Useful to add additional hooks and filters
* that do not need to be set during initialization.
*
* As this runs later on the wp lifecycle, user apis
* and other goodies are available.
*
* @since 2.0.0
* @return void
*/
public function hooks() {} // end hooks;
/**
* Run preparations before checkout processing.
*
* This runs during the checkout form validation
* and it is a great chance to do preflight stuff
* if the gateway requires it.
*
* If you return an array here, Ultimo
* will append the key => value of that array
* as hidden fields to the checkout field,
* and those get submitted with the rest of the form.
*
* As an example, this is how we create payment
* intents for Stripe to make the experience more
* streamlined.
*
* @since 2.0.0
* @return void|array
*/
public function run_preflight() {} // end run_preflight;
/**
* Registers and Enqueue scripts.
*
* This method gets called during the rendering
* of the checkout page, so you can use it
* to register and enqueue custom scripts
* and styles.
*
* @since 2.0.0
* @return void
*/
public function register_scripts() {} // end register_scripts;
/**
* Gives gateways a chance to run things before backwards compatible webhooks are run.
*
* @since 2.0.7
* @return void
*/
public function before_backwards_compatible_webhook() {} // end before_backwards_compatible_webhook;
/**
* Handles webhook calls.
*
* This is the endpoint that gets called
* when a webhook message is posted to the gateway
* endpoint.
*
* You should process the message, if necessary,
* and take the appropriate actions, such as
* renewing memberships, marking payments as complete, etc.
*
* @since 2.0.0
* @return void
*/
public function process_webhooks() {} // end process_webhooks;
/**
* Handles confirmation windows and extra processing.
*
* This endpoint gets called when we get to the
* /confirm/ URL on the registration page.
*
* For example, PayPal needs a confirmation screen.
* And it uses this method to handle that.
*
* @since 2.0.0
* @return void
*/
public function process_confirmation() {} // end process_confirmation;
/**
* Returns the external link to view the payment on the payment gateway.
*
* Return an empty string to hide the link element.
*
* @since 2.0.0
*
* @param string $gateway_payment_id The gateway payment id.
* @return void|string
*/
public function get_payment_url_on_gateway($gateway_payment_id) {} // end get_payment_url_on_gateway;
/**
* Returns the external link to view the membership on the membership gateway.
*
* Return an empty string to hide the link element.
*
* @since 2.0.0
*
* @param string $gateway_subscription_id The gateway subscription id.
* @return void|string.
*/
public function get_subscription_url_on_gateway($gateway_subscription_id) {} // end get_subscription_url_on_gateway;
/**
* Returns the external link to view the membership on the membership gateway.
*
* Return an empty string to hide the link element.
*
* @since 2.0.0
*
* @param string $gateway_customer_id The gateway customer id.
* @return void|string.
*/
public function get_customer_url_on_gateway($gateway_customer_id) {} // end get_customer_url_on_gateway;
/**
* Reflects membership changes on the gateway.
*
* By default, this method will process tha cancellation of current gateway subscription
*
* @since 2.1.3
*
* @param \WP_Ultimo\Models\Membership $membership The membership object.
* @param \WP_Ultimo\Models\Customer $customer The customer object.
* @return bool|\WP_Error true if it's all done or error object if something went wrong.
*/
public function process_membership_update(&$membership, $customer) {
$original = $membership->_get_original();
$has_amount_change = (float) $membership->get_amount() !== (float) wu_get_isset($original, 'amount');
$has_duration_change = $membership->get_duration() !== absint(wu_get_isset($original, 'duration')) || $membership->get_duration_unit() !== wu_get_isset($original, 'duration_unit');
// If there is no change in amount or duration, we don't do anything here.
if (!$has_amount_change && !$has_duration_change) {
return true;
} // end if;
// Cancel the current gateway integration.
$cancellation = $this->process_cancellation($membership, $customer);
if (is_wp_error($cancellation)) {
return $cancellation;
} // end if;
// Reset the gateway in the membership object.
$membership->set_gateway('');
$membership->set_gateway_customer_id('');
$membership->set_gateway_subscription_id('');
$membership->set_auto_renew(false);
return true;
} // end process_membership_update;
/*
* Helper methods
*/
/**
* Returns a message about what will happen to the gateway subscription
* when the membership is updated.
*
* @since 2.1.2
*
* @param bool $to_customer Whether the message is being shown to the customer or not.
* @return string
*/
public function get_amount_update_message($to_customer = false) {
if (!$this->supports_amount_update()) {
$message = __('The current payment integration will be cancelled.', 'wp-ultimo');
if ($to_customer) {
$message .= ' ' . __('You will receive a new invoice on the next billing cycle.', 'wp-ultimo');
} else {
$message .= ' ' . __('The customer will receive a new invoice on the next billing cycle.', 'wp-ultimo');
} // end if;
return $message;
} // end if;
return __('The current payment integration will be updated.', 'wp-ultimo');
} // end get_amount_update_message;
/**
* Get the return URL.
*
* @since 2.0.0
* @return string
*/
public function get_return_url() {
if (empty($this->return_url)) {
$this->return_url = wu_get_current_url();
} // end if;
$return_url = is_admin() ? admin_url('admin.php') : $this->return_url;
$return_url = remove_query_arg(array(
'wu-confirm',
'token',
'PayerID',
), $return_url);
if (is_admin()) {
$args = array('page' => 'account');
if ($this->order) {
$args['updated'] = $this->order->get_cart_type();
} // end if;
$return_url = add_query_arg($args, $return_url);
} else {
$return_url = add_query_arg(array(
'payment' => $this->payment->get_hash(),
'status' => 'done',
), $return_url);
} // end if;
/**
* Allow developers to change the gateway return URL used after checkout processes.
*
* @since 2.0.20
*
* @param string $return_url the URL to redirect after process.
* @param self $gateway the gateway instance.
* @param \WP_Ultimo\Models\Payment $payment the WP Ultimo payment instance.
* @param \WP_Ultimo\Checkout\Cart $cart the current WP Ultimo cart order.
* @return string
*/
return apply_filters('wu_return_url', $return_url, $this, $this->payment, $this->order);
} // end get_return_url;
/**
* Get the cancel URL.
*
* @since 2.0.0
* @return string
*/
public function get_cancel_url() {
if (empty($this->cancel_url)) {
$this->cancel_url = wu_get_current_url();
} // end if;
return add_query_arg(array(
'payment' => $this->payment->get_hash(),
), $this->cancel_url);
} // end get_cancel_url;
/**
* Get the confirm URL.
*
* @since 2.0.0
* @return string
*/
public function get_confirm_url() {
if (empty($this->confirm_url)) {
$this->confirm_url = wu_get_current_url();
} // end if;
return add_query_arg(array(
'payment' => $this->payment->get_hash(),
'wu-confirm' => $this->get_id(),
), $this->confirm_url);
} // end get_confirm_url;
/**
* Returns the webhook url for the listener of this gateway events.
*
* @since 2.0.0
* @return string
*/
public function get_webhook_listener_url() {
$site_url = defined('WU_GATEWAY_LISTENER_URL') ? WU_GATEWAY_LISTENER_URL : get_site_url(wu_get_main_site_id(), '/');
return add_query_arg('wu-gateway', $this->get_id(), $site_url);
} // end get_webhook_listener_url;
/**
* Set the payment.
*
* @since 2.0.0
* @param \WP_Ultimo\Models\Payment $payment The payment.
* @return void
*/
public function set_payment($payment) {
$this->payment = $payment;
} // end set_payment;
/**
* Set the membership.
*
* @since 2.0.0
* @param \WP_Ultimo\Models\Membership $membership The membership.
* @return void
*/
public function set_membership($membership) {
$this->membership = $membership;
} // end set_membership;
/**
* Set the customer.
*
* @since 2.0.0
* @param \WP_Ultimo\Models\Payment $customer The customer.
* @return void
*/
public function set_customer($customer) {
$this->customer = $customer;
} // end set_customer;
/**
* Triggers the events related to processing a payment.
*
* @since 2.0.0
*
* @param \WP_Ultimo\Models\Payment $payment The payment model.
* @param \WP_Ultimo\Models\Membership $membership The membership object.
* @return void
*/
public function trigger_payment_processed($payment, $membership = null) {
if ($membership === null) {
$membership = $payment->get_membership();
} // end if;
do_action('wu_gateway_payment_processed', $payment, $membership, $this);
} // end trigger_payment_processed;
/**
* Save a cart for a future swap.
*
* @since 2.0.0
*
* @param \WP_Ultimo\Checkout\Cart $cart The cart to swap to.
* @return string
*/
public function save_swap($cart) {
$swap_id = uniqid('wu_swap_');
set_site_transient($swap_id, $cart, DAY_IN_SECONDS);
return $swap_id;
} // end save_swap;
/**
* Gets a saved swap based on the id.
*
* @since 2.0.0
*
* @param string $swap_id The saved swap id.
* @return \WP_Ultimo\Checkout\Cart|false
*/
public function get_saved_swap($swap_id) {
return get_site_transient($swap_id);
} // end get_saved_swap;
/**
* Get the compatibility ids for this gateway.
*
* @since 2.0.7
* @return array
*/
public function get_all_ids() {
$all_ids = array_merge(array($this->get_id()), (array) $this->other_ids);
return array_unique($all_ids);
} // end get_all_ids;
/**
* Returns the backwards compatibility id of the gateway from v1.
*
* @since 2.0.4
* @return string
*/
public function get_backwards_compatibility_v1_id() {
return $this->backwards_compatibility_v1_id;
} // end get_backwards_compatibility_v1_id;
} // end class Base_Gateway;