| 30 | }) |
| 31 | |
| 32 | export class Users extends Context.Service<Users, { |
| 33 | list(search: string | undefined): Effect.Effect<Array<User>, UsersError> |
| 34 | getById(id: UserId): Effect.Effect<User, UsersError> |
| 35 | create(input: typeof User.jsonCreate.Type): Effect.Effect<User, UsersError> |
| 36 | update(id: UserId, input: typeof User.jsonUpdate.Type): Effect.Effect<User, UsersError> |
| 37 | }>()("acme/Users") { |
| 38 | // The SQL implementation only requires a `SqlClient`, so entrypoints and |
| 39 | // tests decide how the database is provided. |
| 40 | static readonly layerNoDeps = Layer.effect( |
| 41 | Users, |
| 42 | Effect.gen(function*() { |
| 43 | const sql = yield* SqlClient.SqlClient |
| 44 | |
| 45 | // CRUD goes through a repository derived from the `User` model. Each |
| 46 | // operation uses the matching model variant to encode its input and |
| 47 | // decodes rows with the full model schema. |
| 48 | const repo = yield* SqlModel.makeRepository(User, { |
| 49 | tableName: "users", |
| 50 | spanPrefix: "Users", |
| 51 | idColumn: "id" |
| 52 | }) |
| 53 | |
| 54 | // Queries the repository does not cover are written with the `sql` tag |
| 55 | // and decoded with the model schema. |
| 56 | const listAll = SqlSchema.findAll({ |
| 57 | Request: Schema.Void, |
| 58 | Result: User, |
| 59 | execute: () => sql`SELECT * FROM users ORDER BY createdAt` |
| 60 | }) |
| 61 | |
| 62 | const searchUsers = SqlSchema.findAll({ |
| 63 | Request: Schema.String, |
| 64 | Result: User, |
| 65 | execute: (search) => { |
| 66 | const pattern = `%${search}%` |
| 67 | return sql`SELECT * FROM users WHERE name LIKE ${pattern} OR email LIKE ${pattern}` |
| 68 | } |
| 69 | }) |
| 70 | |
| 71 | const list = Effect.fn("Users.list")(function*(search: string | undefined) { |
| 72 | if (search === undefined || search.length === 0) { |
| 73 | return yield* Effect.orDie(listAll()) |
| 74 | } else if (search.length < SearchQueryTooShort.minimumLength) { |
| 75 | return yield* new UsersError({ |
| 76 | reason: new SearchQueryTooShort() |
| 77 | }) |
| 78 | } |
| 79 | yield* Effect.annotateCurrentSpan({ search }) |
| 80 | return yield* Effect.orDie(searchUsers(search)) |
| 81 | }) |
| 82 | |
| 83 | const getById = Effect.fn("Users.getById")((id: UserId) => |
| 84 | repo.findById(id).pipe( |
| 85 | Effect.catchTags({ |
| 86 | NoSuchElementError: () => new UsersError({ reason: new UserNotFound() }), |
| 87 | // Database and encoding failures are unexpected, so treat them as |
| 88 | // defects to keep the service interface focused on domain errors. |
| 89 | SchemaError: Effect.die, |