class Doorkeeper::OAuth::ClientCredentialsRequest::Creator

def call(client, scopes, attributes = {})
  if lookup_existing_token?
    existing_token = find_existing_token_for(client, scopes)
    return existing_token if server_config.reuse_access_token && existing_token&.reusable?
    existing_token&.revoke if server_config.revoke_previous_client_credentials_token
  end
  server_config.access_token_model.find_or_create_for(
    client, nil, scopes, attributes[:expires_in],
    attributes[:use_refresh_token],
  )
end

def find_existing_token_for(client, scopes)
  server_config.access_token_model.matching_token_for(client, nil, scopes)
end

def lookup_existing_token?
  server_config.reuse_access_token || server_config.revoke_previous_client_credentials_token
end

def server_config
  Doorkeeper.config
end