Added StripeLiveEnabledEvent and StripeLiveDisabledEvent to Stripe service

no issue

- This is preparation work to be able to listen to events whenever Stripe gets enabled in live mode or disabled again.
- This creates two new event types, which are being dispatched with `DomainEvents` from the Stripe service on the `connect()` and - vice versa - the `disconnect()` methods.

ghost/stripe/lib/StripeLiveDisabledEvent.js

@@ -0,0 +1,23 @@
+/**
+ * @typedef {object} StripeLiveDisabledEventData
+ * @prop {string?} message
+ */
+
+module.exports = class StripeLiveDisabledEvent {
+    /**
+     * @param {StripeLiveDisabledEventData} data
+     * @param {Date} timestamp
+     */
+    constructor(data, timestamp) {
+        this.data = data;
+        this.timestamp = timestamp;
+    }
+
+    /**
+     * @param {StripeLiveDisabledEventData} data
+     * @param {Date} [timestamp]
+     */
+    static create(data, timestamp) {
+        return new StripeLiveDisabledEvent(data, timestamp || new Date);
+    }
+};

ghost/stripe/lib/StripeLiveEnabledEvent.js

@@ -0,0 +1,23 @@
+/**
+ * @typedef {object} StripeLiveEnabledEventData
+ * @prop {string} message
+ */
+
+module.exports = class StripeLiveEnabledEvent {
+    /**
+     * @param {StripeLiveEnabledEventData} data
+     * @param {Date} timestamp
+     */
+    constructor(data, timestamp) {
+        this.data = data;
+        this.timestamp = timestamp;
+    }
+
+    /**
+     * @param {StripeLiveEnabledEventData} data
+     * @param {Date} [timestamp]
+     */
+    static create(data, timestamp) {
+        return new StripeLiveEnabledEvent(data, timestamp || new Date);
+    }
+};

ghost/stripe/lib/StripeService.js

@@ -2,6 +2,9 @@ const WebhookManager = require('./WebhookManager');
 const StripeAPI = require('./StripeAPI');
 const StripeMigrations = require('./StripeMigrations');
 const WebhookController = require('./WebhookController');
+const DomainEvents = require('@tryghost/domain-events');
+const StripeLiveEnabledEvent = require('./StripeLiveEnabledEvent');
+const StripeLiveDisabledEvent = require('./StripeLiveDisabledEvent');
 
 module.exports = class StripeService {
     constructor({
@@ -50,6 +53,7 @@ module.exports = class StripeService {
     }
 
     async connect() {
+        DomainEvents.dispatch(StripeLiveEnabledEvent.create({message: 'Stripe Live Mode Enabled'}));
     }
 
     async disconnect() {
@@ -66,6 +70,8 @@ module.exports = class StripeService {
         await this.webhookManager.stop();
 
         this.api.configure(null);
+
+        DomainEvents.dispatch(StripeLiveDisabledEvent.create({message: 'Stripe Live Mode Disabled'}));
     }
 
     async configure(config) {