New: Project Aphrodite

frontend/src/Utilities/Object/getErrorMessage.js

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+function getErrorMessage(xhr, fallbackErrorMessage) {
+  if (!xhr || !xhr.responseJSON || !xhr.responseJSON.message) {
+    return fallbackErrorMessage;
+  }
+
+  const message = xhr.responseJSON.message;
+
+  return message || fallbackErrorMessage;
+}
+
+export default getErrorMessage;

frontend/src/Utilities/Object/hasDifferentItems.js

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+import _ from 'lodash';
+
+function hasDifferentItems(prevItems, currentItems, idProp = 'id') {
+  const diff1 = _.differenceBy(prevItems, currentItems, (item) => item[idProp]);
+  const diff2 = _.differenceBy(currentItems, prevItems, (item) => item[idProp]);
+
+  return diff1.length > 0 || diff2.length > 0;
+}
+
+export default hasDifferentItems;

frontend/src/Utilities/Object/selectUniqueIds.js

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+import _ from 'lodash';
+
+function selectUniqueIds(items, idProp) {
+  const ids = _.reduce(items, (result, item) => {
+    if (item[idProp]) {
+      result.push(item[idProp]);
+    }
+
+    return result;
+  }, []);
+
+  return _.uniq(ids);
+}
+
+export default selectUniqueIds;