feat: Labels reordering

Closes #289

client/src/sagas/core/services/labels.js

@@ -7,11 +7,16 @@ import api from '../../../api';
 import { createLocalId } from '../../../utils/local-id';
 
 export function* createLabel(boardId, data) {
+  const nextData = {
+    ...data,
+    position: yield select(selectors.selectNextLabelPosition, boardId),
+  };
+
   const localId = yield call(createLocalId);
 
   yield put(
     actions.createLabel({
-      ...data,
+      ...nextData,
       boardId,
       id: localId,
     }),
@@ -19,7 +24,7 @@ export function* createLabel(boardId, data) {
 
   let label;
   try {
-    ({ item: label } = yield call(request, api.createLabel, boardId, data));
+    ({ item: label } = yield call(request, api.createLabel, boardId, nextData));
   } catch (error) {
     yield put(actions.createLabel.failure(localId, error));
     return;
@@ -56,6 +61,15 @@ export function* handleLabelUpdate(label) {
   yield put(actions.handleLabelUpdate(label));
 }
 
+export function* moveLabel(id, index) {
+  const { boardId } = yield select(selectors.selectLabelById, id);
+  const position = yield select(selectors.selectNextLabelPosition, boardId, index, id);
+
+  yield call(updateLabel, id, {
+    position,
+  });
+}
+
 export function* deleteLabel(id) {
   yield put(actions.deleteLabel(id));
 
@@ -150,6 +164,7 @@ export default {
   handleLabelCreate,
   updateLabel,
   handleLabelUpdate,
+  moveLabel,
   deleteLabel,
   handleLabelDelete,
   addLabelToCard,