Initial commit

lib/assets/javascripts/builder/data/background-importer/import-model-poller.js

@@ -0,0 +1,27 @@
+var _ = require('underscore');
+var Poller = require('./poller');
+
+var ImportModelPoller = function (model) {
+  var POLLING_INTERVAL = 2000; // Interval time between poll checkings
+  var POLLING_INTERVAL_MULTIPLIER = 2.5; // Multiply interval by this number
+  var POLLING_REQUESTS_BEFORE_INTERVAL_CHANGE = 30; // Max tries until interval change
+
+  var options = {
+    interval: function (numberOfRequests) {
+      if (numberOfRequests >= POLLING_REQUESTS_BEFORE_INTERVAL_CHANGE) {
+        return POLLING_INTERVAL * POLLING_INTERVAL_MULTIPLIER;
+      }
+      return POLLING_INTERVAL;
+    },
+    stopWhen: function (model) {
+      var state = model.get('state');
+      return (state === 'complete' || state === 'failure');
+    }
+  };
+
+  Poller.call(this, model, options);
+};
+
+ImportModelPoller.prototype = _.extend({}, Poller.prototype);
+
+module.exports = ImportModelPoller;