Replace Ember app with Mithril app

js/lib/utils/item-list.js

@@ -0,0 +1,55 @@
+export class Item {
+  constructor(content, position) {
+    this.content = content;
+    this.position = position;
+  }
+}
+
+export default class ItemList {
+  add(key, content, position) {
+    this[key] = new Item(content, position);
+  }
+
+  toArray() {
+    var items = [];
+    for (var i in this) {
+      if (this.hasOwnProperty(i) && this[i] instanceof Item) {
+        items.push(this[i]);
+      }
+    }
+
+    var array = [];
+
+    var addItems = function(method, position) {
+      items = items.filter(function(item) {
+        if ((position && item.position && item.position[position]) || (!position && !item.position)) {
+          array[method](item);
+        } else {
+          return true;
+        }
+      });
+    };
+    addItems('unshift', 'first');
+    addItems('push', false);
+    addItems('push', 'last');
+
+    items = items.filter(function(item) {
+      var key = item.position.before || item.position.after;
+      var type = item.position.before ? 'before' : 'after';
+      if (key) {
+        var index = array.indexOf(this[key]);
+        if (index === -1) {
+          console.log("Can't find item with key '"+key+"' to insert "+type+", inserting at end instead");
+          return true;
+        } else {
+          array.splice(array.indexOf(this[key]) + (type === 'after' ? 1 : 0), 0, item);
+        }
+      }
+    }.bind(this));
+
+    array = array.concat(items);
+
+    return array.map((item) => item.content);
+  }
+}
+