✨ Added custom currency support for Memer's plans

no issue

- Multiple currencies for membe plans were supported under the hood but never had a clear interface to manage them. This change allows to reference currently used currency and it's symbol from the theme layer with following syntax: `{{@price.currency}}` and `{{@price.currency_symbol}}

core/frontend/services/themes/middleware.js

@@ -46,7 +46,18 @@ function ensureActiveTheme(req, res, next) {
  * members settings as publicly readable
  */
 function haxGetMembersPriceData() {
-    const defaultPriceData = {monthly: 0, yearly: 0};
+    const CURRENCY_SYMBOLS = {
+        USD: '$',
+        AUD: '$',
+        CAD: '$',
+        GBP: '£',
+        EUR: '€'
+    };
+    const defaultPriceData = {
+        monthly: 0,
+        yearly: 0
+    };
+
     try {
         const membersSettings = settingsCache.get('members_subscription_settings');
         const stripeProcessor = membersSettings.paymentProcessors.find(
@@ -61,6 +72,9 @@ function haxGetMembersPriceData() {
             });
         }, {});
 
+        priceData.currency = String.prototype.toUpperCase.call(stripeProcessor.config.currency || 'usd');
+        priceData.currency_symbol = CURRENCY_SYMBOLS[priceData.currency];
+
         if (Number.isInteger(priceData.monthly) && Number.isInteger(priceData.yearly)) {
             return priceData;
         }

package.json

@@ -42,7 +42,7 @@
     "@nexes/nql": "0.3.0",
     "@sentry/node": "5.13.1",
     "@tryghost/helpers": "1.1.22",
-    "@tryghost/members-api": "0.17.0",
+    "@tryghost/members-api": "0.18.0",
     "@tryghost/members-ssr": "0.7.4",
     "@tryghost/social-urls": "0.1.5",
     "@tryghost/string": "^0.1.3",

yarn.lock

@@ -330,10 +330,10 @@
     jsonwebtoken "^8.5.1"
     lodash "^4.17.15"
 
-"@tryghost/members-api@0.17.0":
-  version "0.17.0"
-  resolved "https://registry.yarnpkg.com/@tryghost/members-api/-/members-api-0.17.0.tgz#effa17432e6f46e29b7b6091513acc391bede51e"
-  integrity sha512-p0PLHKyBDWcq6hxrhbf02hR3MLYFDfTI3YnEAGkN9FAC7Q9b44zuTJIxh4MEurlJBFB3Fl5eidQOaO1sfSv15Q==
+"@tryghost/members-api@0.18.0":
+  version "0.18.0"
+  resolved "https://registry.yarnpkg.com/@tryghost/members-api/-/members-api-0.18.0.tgz#7a7bd1b36d793c65f3cb687ff52649c79c6c7114"
+  integrity sha512-aymN/i26GHCQI8TtoAyHejJjPrsl+PYSaFTvIq+O57F/Gg8uAH7EJCXKQYUoZKz/95VbpwE3o7QdRWpRMBjEDg==
   dependencies:
     "@tryghost/magic-link" "^0.4.1"
     bluebird "^3.5.4"