feat(mailchimp): add new subscribers trigger

packages/backend/src/apps/mailchimp/dynamic-data/index.js

@@ -0,0 +1,3 @@
+import listAudiences from './list-audiences/index.js';
+
+export default [listAudiences];

packages/backend/src/apps/mailchimp/dynamic-data/list-audiences/index.js

@@ -0,0 +1,40 @@
+export default {
+  name: 'List audiences',
+  key: 'listAudiences',
+
+  async run($) {
+    const audiences = {
+      data: [],
+    };
+    let hasMore = false;
+
+    const params = {
+      sort_field: 'date_created',
+      sort_dir: 'DESC',
+      count: 1000,
+      offset: 0,
+    };
+
+    do {
+      const { data } = await $.http.get('/3.0/lists', { params });
+      params.offset = params.offset + params.count;
+
+      if (data?.lists) {
+        for (const audience of data.lists) {
+          audiences.data.push({
+            value: audience.id,
+            name: audience.name,
+          });
+        }
+      }
+
+      if (data.total_items > params.offset) {
+        hasMore = true;
+      } else {
+        hasMore = false;
+      }
+    } while (hasMore);
+
+    return audiences;
+  },
+};