Initial commit

lib/assets/javascripts/new-dashboard/utils/shift-click.service.js

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+import removeElementsFromArray from './remove-items-from-array';
+
+export function shiftClick (items, selectedItems, currentClickedItem, singleSelectedItem) {
+  // Get indexes from items
+  const lastSelectedItemIndex = items.findIndex(item => item.id === selectedItems[selectedItems.length - 1].id);
+  const currentClickedItemIndex = items.indexOf(currentClickedItem);
+  const singleSelectedItemIndex = items.findIndex(item => item.id === singleSelectedItem.id);
+
+  // Calculate items to select
+  const currentSelectedRangeStart = Math.min(singleSelectedItemIndex, currentClickedItemIndex);
+  const itemsToSelect = Math.abs(singleSelectedItemIndex - currentClickedItemIndex) + 1;
+  const nextSelectedItems = items.slice(currentSelectedRangeStart, currentSelectedRangeStart + itemsToSelect);
+
+  // If the selection is upwards, reverse selected items so that the delete range is correct
+  if (currentClickedItemIndex < singleSelectedItemIndex) {
+    nextSelectedItems.reverse();
+  }
+
+  // Calculate items to delete
+  const previousSelectedRangeStart = Math.min(lastSelectedItemIndex, currentClickedItemIndex);
+  const itemsToDelete = Math.abs(lastSelectedItemIndex - currentClickedItemIndex) + 1;
+  const previousSelectedRange = items.slice(previousSelectedRangeStart, previousSelectedRangeStart + itemsToDelete);
+
+  // Delete previous items from array and add the new ones
+  selectedItems = removeElementsFromArray(selectedItems, previousSelectedRange);
+  const currentSelectedItems = selectedItems.concat(nextSelectedItems);
+  return Array.from(new Set(currentSelectedItems));
+}