feat: Sort cards within list (#717)

Closes #390

server/api/helpers/lists/sort-one.js

@@ -0,0 +1,70 @@
+const List = require('../../models/List');
+
+module.exports = {
+  inputs: {
+    record: {
+      type: 'ref',
+      required: true,
+    },
+    type: {
+      type: 'string',
+      isIn: Object.values(List.SortTypes),
+      defaultsTo: List.SortTypes.NAME_ASC,
+    },
+    request: {
+      type: 'ref',
+    },
+  },
+
+  async fn(inputs) {
+    let cards = await sails.helpers.lists.getCards(inputs.record.id);
+
+    switch (inputs.type) {
+      case List.SortTypes.NAME_ASC:
+        cards.sort((a, b) => a.name.localeCompare(b.name));
+        break;
+      case List.SortTypes.DUE_DATE_ASC:
+        cards.sort((a, b) => {
+          if (a.dueDate === null) return 1;
+          if (b.dueDate === null) return -1;
+          return new Date(a.dueDate) - new Date(b.dueDate);
+        });
+        break;
+      case List.SortTypes.CREATED_AT_ASC:
+        cards.sort((a, b) => new Date(a.createdAt) - new Date(b.createdAt));
+        break;
+      case List.SortTypes.CREATED_AT_DESC:
+        cards.sort((a, b) => new Date(b.createdAt) - new Date(a.createdAt));
+        break;
+      default:
+        throw new Error('Invalid sort type specified');
+    }
+
+    const positions = cards.map((c) => c.position).sort((a, b) => a - b);
+
+    cards = await Promise.all(
+      cards.map(({ id }, index) =>
+        Card.updateOne({
+          id,
+          listId: inputs.record.id,
+        }).set({
+          position: positions[index],
+        }),
+      ),
+    );
+
+    sails.sockets.broadcast(
+      `board:${inputs.record.boardId}`,
+      'listSort',
+      {
+        item: inputs.record,
+        included: {
+          cards,
+        },
+      },
+      inputs.request,
+    );
+
+    return cards;
+  },
+};