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<?php declare( strict_types = 1 ); namespace Automattic\WooCommerce\Internal\PushNotifications\Notifications; use InvalidArgumentException; defined( 'ABSPATH' ) || exit; /** * Base class for push notifications. * * Each notification type (e.g. new order, new review) extends this class * and implements `to_payload()` with its own title, message, icon, and meta. * * @since 10.7.0 */ abstract class Notification { /** * Map of notification type identifiers to their corresponding subclass. * * @var array<string, class-string<Notification>> */ const NOTIFICATION_CLASSES = array( 'store_order' => NewOrderNotification::class, 'store_review' => NewReviewNotification::class, 'store_stock' => StockNotification::class, ); /** * The ID of the resource this notification is about (e.g. order ID, comment * ID). * * @var int */ private int $resource_id; /** * Creates a new Notification instance. * * @param int $resource_id The resource ID. * * @throws InvalidArgumentException If the resource ID is invalid. * * @since 10.7.0 */ public function __construct( int $resource_id ) { if ( $resource_id <= 0 ) { throw new InvalidArgumentException( 'Notification resource_id must be positive.' ); } $this->resource_id = $resource_id; } /** * Returns the notification type identifier, this should match the subtype * or type (if there isn't a subtype) values attributed to notes in * WordPress.com. * * @return string * * @since 10.7.0 */ abstract public function get_type(): string; /** * Returns the WPCOM-ready payload for this notification. * * Returns null if the underlying resource no longer exists. * * @return array|null * * @since 10.7.0 */ abstract public function to_payload(): ?array; /** * Checks whether a meta key exists for this notification's resource. * * @param string $key The meta key. * @return bool * * @since 10.7.0 */ abstract public function has_meta( string $key ): bool; /** * Writes a meta key with a timestamp to this notification's resource. * * @param string $key The meta key. * @return void * * @since 10.7.0 */ abstract public function write_meta( string $key ): void; /** * Deletes a meta key from this notification's resource. * * @param string $key The meta key. * @return void * * @since 10.8.0 */ abstract public function delete_meta( string $key ): void; /** * Returns the notification data as an array. * * @return array{type: string, resource_id: int} * * @since 10.7.0 */ public function to_array(): array { return array( 'type' => $this->get_type(), 'resource_id' => $this->resource_id, ); } /** * Reconstructs a Notification subclass from a serialized array. * * @param array{type: string, resource_id: int} $data The notification data. * @return self * * @throws InvalidArgumentException If the type is unknown. * * @since 10.7.0 */ public static function from_array( array $data ): self { $type = $data['type'] ?? ''; $resource_id = (int) ( $data['resource_id'] ?? 0 ); $class = self::NOTIFICATION_CLASSES[ $type ] ?? null; if ( ! $class ) { // phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped throw new InvalidArgumentException( sprintf( 'Unknown notification type: %s', $type ) ); } $instance = new $class( $resource_id ); if ( method_exists( $instance, 'hydrate' ) ) { $instance->hydrate( $data ); } return $instance; } /** * Returns a unique identifier for this notification, used for * deduplication. * * @return string * * @since 10.7.0 */ public function get_identifier(): string { return sprintf( '%s_%s_%s', get_current_blog_id(), $this->get_type(), $this->resource_id ); } /** * Gets the resource ID. * * @return int * * @since 10.7.0 */ public function get_resource_id(): int { return $this->resource_id; } /** * Canonical positional ActionScheduler arguments for the safety-net job. * * Single source of truth shared by the scheduler (and its dedupe guard) and * the cancel path so the serialized args always match. Action Scheduler * matches the stored args by exact equality, so any divergence between the * schedule-side and cancel-side shapes silently breaks cancellation. * * The args are keyed on the notification's *identity* — the minimal data * needed to uniquely identify and reconstruct the notification — mirroring * {@see self::get_identifier()}. Volatile payload fields (e.g. a stock * snapshot captured at trigger time) must not be included: they are not part * of the identity and may differ between schedule and cancel. * * @return array<int, mixed> * * @since 10.9.0 */ public function get_safety_net_args(): array { return array( $this->get_type(), $this->get_resource_id() ); } /** * Decide whether this notification should be delivered to a user given * their stored preference value for {@see static::get_type()}. * * `$pref_value` is whatever the user has stored under this notification * type's preference key, or `null` if they have nothing stored. The * {@see NotificationPreferencesService} stores each preference as an * object so future sub-fields (thresholds, sub-toggles) can be added * without bumping the schema version — today's shape is * `['enabled' => bool]`, future shapes might add e.g. * `['enabled' => true, 'min_value' => 500]` for an order threshold. * * Default: read the universal `enabled` sub-field, defaulting to `true` * when the value is missing or has no `enabled` key (so newly-added * notification types are opt-in by default). Subclasses override to * read richer sub-fields and to consult their own resource (e.g. * compare an order total to the user's `min_value`). * * Subclasses must keep this side-effect-free — the {@see NotificationProcessor} * may call it once per recipient user per notification. * * @param mixed $pref_value The user's stored preference value, or null. * @return bool True if this notification should be sent to that user. * * @since 10.9.0 */ public function should_send_to_user( $pref_value ): bool { if ( null === $pref_value ) { return true; } if ( is_array( $pref_value ) ) { return (bool) ( $pref_value['enabled'] ?? true ); } // Defensive fallback for unexpected scalar values; the service // always normalises stored prefs to the array shape above. return (bool) $pref_value; } }
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