Custom topics for API Platform and Mercure

[alexglvr]

Hello,

I have Mercure working with Api-Platform.

My entities have a field called usergroup, and I want sse messages to be sent only to users that have the same user group.

I thought using custom topics for that.

By default mercure integration in api-platform uses the following form of topics: http://serverIP/api/entityname/{id} (i.e. IRI)

I would need something like http://serverIP/api/entityname/{id}/object.usergroup

Which would permit, in my client app, to subscribe to http://serverIP/api/entityname/{id}/user.usergroup

How can I generate these custom topics via api-platforme & mercure integration? (nb accessing object.usergroup is ok, the problem relly on retreiving the original topic / IRI)

Is there another / better way or filtering message to user groups ?

Thank you for your help

[divine]

Hello,

Here goes an example:

#[ApiResource(
    mercure: "object.mercureOptions()",
)]

class User
{
    public function mercureOptions()
    {
        return [
            'private' => true,
            'topics' => [
                '/users/' . (int) $this->getId(),
                '/groups/' . (int) $this->getGroupId()->getId()
            ]
        ];
    }
}

However, keep in mind that you need to generate correct JWT data for it also:

$payload['mercure'] = ['subscribe' => ['/users/' . $userId, '/groups/' . $groupId']];

Thanks!

[stale[bot]]

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