Group plans reorder tasks (#8358)

* Added move route for group tasks

* Added group task reorder to front end

* Added syncing with group task order

* Fixed linting issues

* Added missing exec and abstracted move code

* Added unit test for moveTask

test/api/v3/integration/tasks/groups/POST-tasks_move_taskId_to_position.test.js

@@ -0,0 +1,49 @@
+import {
+  generateUser,
+  generateGroup,
+} from '../../../../../helpers/api-v3-integration.helper';
+
+describe('POST group-tasks/:taskId/move/to/:position', () => {
+  let user, guild;
+
+  beforeEach(async () => {
+    user = await generateUser({balance: 1});
+    guild = await generateGroup(user, {type: 'guild'});
+  });
+
+  it('can move task to new position', async () => {
+    let tasks = await user.post(`/tasks/group/${guild._id}`, [
+      {type: 'habit', text: 'habit 1'},
+      {type: 'habit', text: 'habit 2'},
+      {type: 'daily', text: 'daily 1'},
+      {type: 'habit', text: 'habit 3'},
+      {type: 'habit', text: 'habit 4'},
+      {type: 'todo', text: 'todo 1'},
+      {type: 'habit', text: 'habit 5'},
+    ]);
+
+    let taskToMove = tasks[1];
+    expect(taskToMove.text).to.equal('habit 2');
+    let newOrder = await user.post(`/group-tasks/${tasks[1]._id}/move/to/3`);
+    expect(newOrder[3]).to.equal(taskToMove._id);
+    expect(newOrder.length).to.equal(5);
+  });
+
+  it('can push to bottom', async () => {
+    let tasks = await user.post(`/tasks/group/${guild._id}`, [
+      {type: 'habit', text: 'habit 1'},
+      {type: 'habit', text: 'habit 2'},
+      {type: 'daily', text: 'daily 1'},
+      {type: 'habit', text: 'habit 3'},
+      {type: 'habit', text: 'habit 4'},
+      {type: 'todo', text: 'todo 1'},
+      {type: 'habit', text: 'habit 5'},
+    ]);
+
+    let taskToMove = tasks[1];
+    expect(taskToMove.text).to.equal('habit 2');
+    let newOrder = await user.post(`/group-tasks/${tasks[1]._id}/move/to/-1`);
+    expect(newOrder[4]).to.equal(taskToMove._id);
+    expect(newOrder.length).to.equal(5);
+  });
+});