Document changing the description of running app subscriptions

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -180,6 +180,22 @@ instead of trusting the query string. Subscriptions work the same way
 (`$user->subscriptions()->create([...])->confirmationUrl(...)`, `&subscription=…`).
 Unconfirmed bookings are cancelled after 24 hours.
 
+Physical goods need a shipping address (`first_name`, `last_name`, `address`, `postal_code`,
+`city`, `country_iso`). The user can change both addresses on the confirmation page, so read the
+shipping address from the order (or the `order.completed` webhook) before you ship. An item's
+`image_url` is copied to Anikeen ID and stays visible on the order and invoice:
+
+```php
+$order = $user->orders()->create([
+    'billing_address_id' => $addressId,
+    'shipping_address' => ['first_name' => 'Ada', 'last_name' => 'Lovelace', 'address' => 'Main St', 'house_number' => '1', 'postal_code' => '10115', 'city' => 'Berlin', 'country_iso' => 'DE'],
+    'items' => [
+        ['type' => 'physical', 'name' => 'T-shirt', 'unit' => 'piece', 'units' => 1, 'gross_price' => '24.90', 'image_url' => 'https://shop.test/img/shirt.png'],
+        ['type' => 'physical-reduced', 'name' => 'Artbook', 'unit' => 'piece', 'units' => 1, 'gross_price' => '19.95'],
+    ],
+]);
+```
+
 `checkout()` on such a draft throws `ConfirmationRequiredException`; its `confirmationUrl`
 points to the same page. Trusted apps keep checking out directly.
 

src/Id/Billable.php

@@ -29,6 +29,21 @@ trait Billable
     use ManagesTransactions;
     use ManagesUserSshKeys;
 
+    /*
+     * API results cached per instance. Declared, so Eloquent models don't take them for
+     * attributes (an undeclared property goes through Model::__set and save() then fails
+     * with "no such column").
+     */
+    protected mixed $addressesCache = null;
+    protected mixed $countriesCache = null;
+    protected mixed $defaultPaymentMethodCache = null;
+    protected mixed $invoicesCache = null;
+    protected mixed $ordersCache = null;
+    protected mixed $paymentMethodsCache = null;
+    protected mixed $subscriptionsCache = null;
+    protected mixed $transactionsCache = null;
+    protected mixed $userDataCache = null;
+
     /**
      * Get the currently authenticated user.
      *

src/Id/Concerns/ManagesUserBilling.php

@@ -31,7 +31,7 @@ trait ManagesUserBilling
      *     billing_address?: array,
      *     shipping_address_id?: string,
      *     shipping_address?: array,
-     *     items: array<array{type: string, name: string, description?: string, price?: float|string, gross_price?: float|string, unit: string, units: int}>,
+     *     items: array<array{type: string, name: string, description?: string, image_url?: string, price?: float|string, gross_price?: float|string, unit: string, units: int}>,
      *     checkout?: bool,
      *     transaction_id?: string,
      *     transaction?: array,

src/Id/Resources/AppSubscription.php

@@ -47,7 +47,9 @@ class AppSubscription implements JsonSerializable
     }
 
     /**
-     * Change a subscription that wasn't checked out yet.
+     * Change a subscription (send only what changes). Before checkout everything can change;
+     * afterwards only the description, which names what the customer pays for and is shown
+     * on their bills, e.g. `$subscription->update(['description' => 'web-01.example.com'])`.
      *
      * @throws ApiException
      */

src/Id/Resources/Order.php

@@ -42,13 +42,13 @@ class Order extends BaseResource
      *      },
      *      shipping_address: null|array{
      *           company_name: null|string,
-     *           first_name:  string,
+     *           first_name: string,
      *           last_name: string,
-     *           address: null|string,
-     *           address_2: string,
+     *           address: string,
+     *           address_2: null|string,
      *           house_number: null|string,
      *           city: string,
-     *           state: string,
+     *           state: null|string,
      *           postal_code: string,
      *           country_iso: string,
      *           phone_number: null|string,
@@ -56,7 +56,7 @@ class Order extends BaseResource
      *      }
      *  } $attributes The order data:
      *    - billing_address:  Billing address (ISO 3166-1 alpha-2 country code)
-     *    - shipping_address: Shipping address (first name, last name, ISO 3166-1 alpha-2 country code)
+     *    - shipping_address: Shipping address for physical items (first name, last name, address, postal code, city, ISO 3166-1 alpha-2 country code)
      * @throws Throwable
      */
     public function update(array $attributes = []): self

src/Id/Resources/Orders.php

@@ -36,30 +36,37 @@ class Orders extends BaseCollection
      *     },
      *     shipping_address: null|array{
      *          company_name: null|string,
-     *          first_name:  string,
+     *          first_name: string,
      *          last_name: string,
-     *          address: null|string,
-     *          address_2: string,
+     *          address: string,
+     *          address_2: null|string,
      *          house_number: null|string,
      *          city: string,
-     *          state: string,
+     *          state: null|string,
      *          postal_code: string,
      *          country_iso: string,
      *          phone_number: null|string,
      *          email: null|string
      *     },
      *     items: array<array{
-     *         type:        string,
-     *         name:        string,
-     *         description: string,
-     *         price:       float|int,
-     *         unit:        string,
-     *         units:       int
+     *         type:         string,
+     *         name:         string,
+     *         description?: null|string,
+     *         image_url?:   null|string,
+     *         price?:       float|int|string,
+     *         gross_price?: float|int|string,
+     *         unit:         string,
+     *         units:        int
      *     }>
      * } $attributes The order data:
      *   - billing_address:  Billing address (ISO 3166-1 alpha-2 country code)
-     *   - shipping_address: Shipping address (first name, last name, ISO 3166-1 alpha-2 country code)
-     *   - items:            Array of order items (each with type, name, price, unit, units, and quantity)
+     *   - shipping_address: Shipping address for physical items (first name, last name, address, postal code, city, ISO 3166-1 alpha-2 country code)
+     *   - items:            Array of order items:
+     *       - type:        digital, physical or physical-reduced (VAT category)
+     *       - price/gross_price: net or gross unit price, one of both
+     *       - unit:        hour, day, week, month, year, onetime or piece
+     *       - image_url:   http(s) URL of a product image; Anikeen ID copies it, so it stays
+     *                      visible on the order and invoice when the shop removes it later
      * @throws Throwable
      */
     public function create(array $attributes = []): Order

tests/Id/BillableModelTest.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Anikeen\Id\Tests;
+
+use Anikeen\Id\Billable;
+use Illuminate\Database\Eloquent\Model;
+
+class BillableModelTest extends TestCase
+{
+    public function test_cached_api_results_are_not_model_attributes(): void
+    {
+        $user = new class extends Model {
+            use Billable;
+
+            protected $guarded = [];
+
+            public function cacheAll(): void
+            {
+                foreach (['addresses', 'countries', 'defaultPaymentMethod', 'invoices', 'orders', 'paymentMethods', 'subscriptions', 'transactions', 'userData'] as $name) {
+                    $this->{$name.'Cache'} = 'cached';
+                }
+            }
+        };
+        $user->email = 'ada@example.com';
+
+        $user->cacheAll();
+
+        // save() would otherwise write them as columns ("no such column: ordersCache")
+        $this->assertSame(['email' => 'ada@example.com'], $user->getAttributes());
+    }
+}