fix: default the resolved customer to the current user

[justlevine]

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What does this implement/fix? Explain your changes.

This PR fixes the RootQuery.customer query to default to the current user. This prevents mismatches where the user is logged in, but the customer is still a guest session.

The underlying issue is that the customer resolver was previously only using the existing woocommerce-session (if it exists) or an explicit id passed by as an arg, but never the current authenticated user's ID. This could lead to a situation (first-time queries usually) where a user is authenticated with an Authorization header, but the customer is a guest session.

After the change, the resolver defaults to using the current user id, and will only fallback to the guest session if no user is logged in.

Does this close any currently open issues?

Not that I know of.

Any relevant logs, error output, GraphiQL screenshots, etc?

(If it’s long, please paste to https://ghostbin.com/ and insert the link here.)

Any other comments?

Didn't add a unit test for this since I cant get the test env running, but it should essentially:

1. wp_set_current_user( $some_user );
2. run this query

query {
  customer {
    id
    databaseId
  }
  viewer {
    databaseId
  }
}

3. Ensure customer.id !== 'guest' and customer.databaseId === viewer.databaseId === the logged in user.

Where has this been tested?

• WooGraphQL Version: dev-develop
• WPGraphQL Version: 1.14.10
• WordPress Version: 6.3
• WooCommerce Version: 8.0.2

[kidunot89]

@justlevine Good catch, bro