Added logic to fetch event-invoice data & filters

Fix eslint issues

Author: mrsaicharan1

app/controllers/account/billing-info/invoices.js

@@ -0,0 +1,34 @@
+import Controller from '@ember/controller';
+import { filterBy } from '@ember/object/computed';
+import moment from 'moment';
+import { computed } from '@ember/object';
+
+export default Controller.extend({
+  dueInvoices      : filterBy('model', 'status', 'due'),
+  paidInvoices     : filterBy('model', 'status', 'paid'),
+  upcomingInvoices : computed(function() {
+    let filterOptions = [];
+    filterOptions = [
+      {
+        and: [
+          {
+            name : 'deleted-at',
+            op   : 'eq',
+            val  : null
+          },
+          {
+            name : 'created-at',
+            op   : 'ge',
+            val  : moment().subtract(30, 'days').toISOString()
+          }
+        ]
+      }
+    ];
+    return this.store.query('event-invoice', {
+      filter  : filterOptions,
+      include : 'event'
+    });
+
+  })
+
+});

app/routes/account/billing-info/invoices.js

@@ -1,4 +1,9 @@
 import Route from '@ember/routing/route';
 
 export default Route.extend({
+    model() {
+        return this.store.query('event-invoice', {
+            include :'event'
+        })
+    }
 });

tests/unit/controllers/account/billing-info/invoices-test.js

@@ -0,0 +1,12 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'ember-qunit';
+
+module('Unit | Controller | account/billing-info/invoices', function(hooks) {
+  setupTest(hooks);
+
+  // Replace this with your real tests.
+  test('it exists', function(assert) {
+    let controller = this.owner.lookup('controller:account/billing-info/invoices');
+    assert.ok(controller);
+  });
+});