55 lines
1.7 KiB
Go
55 lines
1.7 KiB
Go
package storage
|
|
|
|
import "errors"
|
|
|
|
// Tests for this code are in the "memory" package, since this package doesn't
|
|
// define a concrete storage implementation.
|
|
|
|
// staticClientsStorage is a storage that only allow read-only actions on clients.
|
|
// All read actions return from the list of clients stored in memory, not the
|
|
// underlying
|
|
type staticClientsStorage struct {
|
|
Storage
|
|
|
|
// A read-only set of clients.
|
|
clients []Client
|
|
clientsByID map[string]Client
|
|
}
|
|
|
|
// WithStaticClients returns a storage with a read-only set of clients. Write actions,
|
|
// such as creating other clients, will fail.
|
|
//
|
|
// In the future the returned storage may allow creating and storing additional clients
|
|
// in the underlying storage.
|
|
func WithStaticClients(s Storage, staticClients []Client) Storage {
|
|
clientsByID := make(map[string]Client, len(staticClients))
|
|
for _, client := range staticClients {
|
|
clientsByID[client.ID] = client
|
|
}
|
|
return staticClientsStorage{s, staticClients, clientsByID}
|
|
}
|
|
|
|
func (s staticClientsStorage) GetClient(id string) (Client, error) {
|
|
if client, ok := s.clientsByID[id]; ok {
|
|
return client, nil
|
|
}
|
|
return Client{}, ErrNotFound
|
|
}
|
|
|
|
func (s staticClientsStorage) ListClients() ([]Client, error) {
|
|
clients := make([]Client, len(s.clients))
|
|
copy(clients, s.clients)
|
|
return clients, nil
|
|
}
|
|
|
|
func (s staticClientsStorage) CreateClient(c Client) error {
|
|
return errors.New("static clients: read-only cannot create client")
|
|
}
|
|
|
|
func (s staticClientsStorage) DeleteClient(id string) error {
|
|
return errors.New("static clients: read-only cannot delete client")
|
|
}
|
|
|
|
func (s staticClientsStorage) UpdateClient(id string, updater func(old Client) (Client, error)) error {
|
|
return errors.New("static clients: read-only cannot update client")
|
|
}
|