first commit

web/state/listManager.js

@@ -0,0 +1,59 @@
+// manages a list of things that change over time
+// used for:
+// - The currently running imports
+// - etc..
+const _ = require('lodash');
+
+var ListManager = function() {
+  this._list = [];
+}
+
+// add an item to the list
+ListManager.prototype.add = function(obj) {
+  if(!obj.id)
+    return false;
+  this._list.push(_.clone(obj));
+  return true;
+}
+
+// update some properties on an item
+ListManager.prototype.update = function(id, updates) {
+  let item = this._list.find(i => i.id === id);
+  if(!item)
+    return false;
+  _.merge(item, updates);
+  return true;
+}
+
+// get an item from the list
+ListManager.prototype.get = function(id) {
+  return this._list.find(i => i.id === id);
+}
+
+// push a value to a array property of an item
+ListManager.prototype.push = function(id, prop, value) {
+  let item = this._list.find(i => i.id === id);
+  if(!item)
+    return false;
+
+  item[prop].push(value);
+  return true;
+}
+
+// delete an item from the list
+ListManager.prototype.delete = function(id) {
+  let wasThere = this._list.find(i => i.id === id);
+  this._list = this._list.filter(i => i.id !== id);
+
+  if(wasThere)
+    return true;
+  else
+    return false;
+}
+
+// getter
+ListManager.prototype.list = function() {
+  return this._list;
+}
+
+module.exports = ListManager;