Updating User field in Structure via hook

Kirby 3 Solved ✅
1

I’m trying to add users to a specific structure depending on their role via a hook. My structure looks like this:

Codes:

- 
  code: ATEST
  user:
    - 40oDx6nv
- 
  code: BTEST
  user: [ ]
- 
  code: CTEST
  user: [ ]

Codes are manually added to the Structure and the User field left empty so when a new user is created they are assigned a code by being added to the next empty user field in the structure. Here’s my hook (in update:after to make testing easier, will be changed to create:after and adjusted later):

'user.update:after' => function ($newUser,$oldUser) {
      if($newUser->role() == 'customer'){
        $site = $this->site();        
        $yaml = $site->content()->codes()->yaml();
        foreach($yaml as $y) {
          if(!isset($y['user'])) {
            $y['user'] = $newUser;
            break;
          }
        }
      }
    },

This doesn’t do anything though. I’ve never updated a structure before, only ever added to one, so I’m pretty sure that’s where I’m going wrong here. Any ideas?

2

Inside the structure field, does the user field only ever have one user or can there be multiple ones? What is the condition for adding a user to a particular code? Please describe in a bit more details what exactly you want to achieve.

Your hook doesn’t contain any code that updates anything…

3

It should be one user per field.

I’m trying to assign a pre-defined promotion code to users when their account is created. The accounts are being created from the frontend (successfully) after a payment from Stripe is made. So my client enters promotion codes in the structure field and leaves the user field blank. A user then signs up, and in a user.creater:after hook I check for the next code in the structure field that has an empty user field and write that user to the structure field. I was trying to repurpose this code to do that: Update specific structure field - #2 by texnixe

4

So first problem, you need a user.create:after hook instead of user.update:after hook.

Secondly, you need to find the key of the array item with an empty users field.

  'hooks' => [
    'user.create:after' => function ($user) {
      if ($user->role()->name() === 'customer') {
        $site       = site();
        $codes      = $site->codes()->yaml();
        $emptyItems = array_filter($codes, function ($item) {
          return empty($item['user']);
        });
        if (!empty($emptyItems)) {
          $key = array_key_first($emptyItems);
          $codes[$key]['user'] = [$user->id()];
        }

        $site->update(['codes' => Data::encode($codes, 'yaml')]);
      }
    },
  ]
1 Like
5

Works great, thank you! I was using user.update just to make testing easier. I definitely need to brush up on my PHP, I didn’t know array_key_first existed!