wip: split shared ops

common/script/libs/preenTodos.js

@@ -0,0 +1,14 @@
+import moment from 'moment';
+import _ from 'lodash';
+
+/*
+  Preen 3-day past-completed To-Dos from Angular & mobile app
+ */
+
+module.exports = function(tasks) {
+  return _.filter(tasks, function(t) {
+    return !t.completed || (t.challenge && t.challenge.id) || moment(t.dateCompleted).isAfter(moment().subtract({
+      days: 3
+    }));
+  });
+};