feat: Add tasks reordering

Closes #50, closes #232

server/api/helpers/tasks/create-one.js

@@ -2,6 +2,7 @@ module.exports = {
   inputs: {
     values: {
       type: 'json',
+      custom: (value) => _.isPlainObject(value) && _.isFinite(value.position),
       required: true,
     },
     card: {
@@ -14,8 +15,32 @@ module.exports = {
   },
 
   async fn(inputs) {
+    const tasks = await sails.helpers.cards.getTasks(inputs.card.id);
+
+    const { position, repositions } = sails.helpers.utils.insertToPositionables(
+      inputs.values.position,
+      tasks,
+    );
+
+    repositions.forEach(async ({ id, position: nextPosition }) => {
+      await Task.update({
+        id,
+        cardId: inputs.card.id,
+      }).set({
+        position: nextPosition,
+      });
+
+      sails.sockets.broadcast(`board:${inputs.card.boardId}`, 'taskUpdate', {
+        item: {
+          id,
+          position: nextPosition,
+        },
+      });
+    });
+
     const task = await Task.create({
       ...inputs.values,
+      position,
       cardId: inputs.card.id,
     }).fetch();