feat: Implement update flow folder API endpoint

packages/backend/src/models/flow.js

@@ -2,6 +2,7 @@ import { ValidationError } from 'objection';
 import Base from './base.js';
 import Step from './step.js';
 import User from './user.js';
+import Folder from './folder.js';
 import Execution from './execution.js';
 import ExecutionStep from './execution-step.js';
 import globalVariable from '../helpers/global-variable.js';
@@ -88,6 +89,14 @@ class Flow extends Base {
         to: 'users.id',
       },
     },
+    folder: {
+      relation: Base.HasOneRelation,
+      modelClass: Folder,
+      join: {
+        from: 'flows.folder_id',
+        to: 'folders.id',
+      },
+    },
   });
 
   static async populateStatusProperty(flows) {
@@ -338,6 +347,23 @@ class Flow extends Base {
     return allowedToRunFlows ? false : true;
   }
 
+  async updateFolder(folderId) {
+    const user = await this.$relatedQuery('user');
+
+    const folder = await user
+      .$relatedQuery('folders')
+      .findOne({
+        id: folderId,
+      })
+      .throwIfNotFound();
+
+    await this.$query().patch({
+      folderId: folder.id,
+    });
+
+    return this.$query().withGraphFetched('folder');
+  }
+
   async updateStatus(newActiveValue) {
     if (this.active === newActiveValue) {
       return this;