Add support for sorting categories

src/action/updatecategorysorting.ts

@@ -0,0 +1,56 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2020 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { uniq } from 'lodash'
+import { assertIdWithinFamily } from '../util/token'
+import { ParentAction } from './basetypes'
+
+export class UpdateCategorySortingAction extends ParentAction {
+  readonly categoryIds: Array<string>
+
+  constructor ({ categoryIds }: {
+    categoryIds: Array<string>
+  }) {
+    super()
+
+    if (categoryIds.length === 0) {
+      throw new Error('empty category sorting list')
+    }
+
+    if (uniq(categoryIds).length !== categoryIds.length) {
+      throw new Error('category sorting list has duplicates')
+    }
+
+    categoryIds.forEach((categoryId) => assertIdWithinFamily(categoryId))
+
+    this.categoryIds = categoryIds
+  }
+
+  serialize = (): SerializedUpdateCategorySortingAction => ({
+    type: 'UPDATE_CATEGORY_SORTING',
+    categoryIds: this.categoryIds
+  })
+
+  static parse = ({ categoryIds }: SerializedUpdateCategorySortingAction) => (
+    new UpdateCategorySortingAction({ categoryIds })
+  )
+}
+
+export interface SerializedUpdateCategorySortingAction {
+  type: 'UPDATE_CATEGORY_SORTING'
+  categoryIds: Array<string>
+}