Initial Commit Rework

frontend/src/Utilities/Table/toggleSelected.js

@@ -0,0 +1,26 @@
+import areAllSelected from './areAllSelected';
+import getToggledRange from './getToggledRange';
+
+function toggleSelected(state, items, id, selected, shiftKey) {
+  const lastToggled = state.lastToggled;
+  const selectedState = {
+    ...state.selectedState,
+    [id]: selected
+  };
+
+  if (shiftKey && lastToggled) {
+    const { lower, upper } = getToggledRange(items, id, lastToggled);
+
+    for (let i = lower; i < upper; i++) {
+      selectedState[items[i].id] = selected;
+    }
+  }
+
+  return {
+    ...areAllSelected(selectedState),
+    lastToggled: id,
+    selectedState
+  };
+}
+
+export default toggleSelected;