Bug 1772415: Filter devices list by 21 days. r=markh

Differential Revision: https://phabricator.services.mozilla.com/D148203

services/fxaccounts/FxAccountsClient.jsm

@@ -33,6 +33,8 @@ const HOST_PREF = "identity.fxaccounts.auth.uri";
 
 const SIGNIN = "/account/login";
 const SIGNUP = "/account/create";
+// Devices older than this many days will not appear in the devices list
+const DEVICES_FILTER_DAYS = 21;
 
 var FxAccountsClient = function(host = Services.prefs.getCharPref(HOST_PREF)) {
   this.host = host;
@@ -705,7 +707,8 @@ FxAccountsClient.prototype = {
   },
 
   /**
-   * Get a list of currently registered devices
+   * Get a list of currently registered devices that have been accessed
+   * in the last `DEVICES_FILTER_DAYS` days
    *
    * @method getDeviceList
    * @param  sessionTokenHex
@@ -724,9 +727,9 @@ FxAccountsClient.prototype = {
    *         ]
    */
   async getDeviceList(sessionTokenHex) {
-    let path = "/account/devices";
+    let timestamp = Date.now() - 1000 * 60 * 60 * 24 * DEVICES_FILTER_DAYS;
+    let path = `/account/devices?filterIdleDevicesTimestamp=${timestamp}`;
     let creds = await deriveHawkCredentials(sessionTokenHex, "sessionToken");
-
     return this._request(path, "GET", creds, {});
   },