feat: IndexedDB based caching for labels, inboxes and teams [CW-50] (#6710)

* feat: allow caching of labels in the account scope

* feat: send cache keys in account json response

* feat: kickstart web worker

* feat: setup basic architecture for workers

* feat: install idb

* feat: add datamanger

* fix: typos

* refactor: rename method

* feat: make init db a manual step

* refactor: separate accountIdFromRoute

* feat: cache enabled API client

* feat: enable caching for inboxes and labels

* feat: enable cache for team

* feat: manage exceptions for team

* feat: add team to data manager

* feat: add a generic listener

* refactor: send only cache keys

* refactor: separate validate method

* feat: add listeners

* feat: add event for revalidate

* feat: add cache keys endpoint

* refactor: fetch cache keys instead of full account data

* fix: key pattern

* feat: don't fetch account for cache_keys

* fix: cache key base class

* refactor: cache keys helper

* feat: add helper

* fix: cache-key update logic

* feat: delete indexeddb on logout

* feat: remove worker.js

* refactor: move data-manager

* refactor: name of file

* feat: add test for DataManager

* refactor: add fake idb to jest setup

* test: cache keys helper

* test: cache keys helper

* test: cache_keys in accounts controller

* refactor: remove cache_keys context

* feat: add policy for cache-keys

app/javascript/dashboard/api/ApiClient.js

@@ -13,6 +13,19 @@ class ApiClient {
     return `${this.baseUrl()}/${this.resource}`;
   }
 
+  // eslint-disable-next-line class-methods-use-this
+  get accountIdFromRoute() {
+    const isInsideAccountScopedURLs = window.location.pathname.includes(
+      '/app/accounts'
+    );
+
+    if (isInsideAccountScopedURLs) {
+      return window.location.pathname.split('/')[3];
+    }
+
+    return '';
+  }
+
   baseUrl() {
     let url = this.apiVersion;
 
@@ -20,15 +33,8 @@ class ApiClient {
       url = `/enterprise${url}`;
     }
 
-    if (this.options.accountScoped) {
-      const isInsideAccountScopedURLs = window.location.pathname.includes(
-        '/app/accounts'
-      );
-
-      if (isInsideAccountScopedURLs) {
-        const accountId = window.location.pathname.split('/')[3];
-        url = `${url}/accounts/${accountId}`;
-      }
+    if (this.options.accountScoped && this.accountIdFromRoute) {
+      url = `${url}/accounts/${this.accountIdFromRoute}`;
     }
 
     return url;