Vaporでp-x9/AliasMacroをContentやModelに使ってみる。

// swift-tools-version:5.9
import PackageDescription

let package = Package(
  name: "alias",
  platforms: [
    .macOS(.v13)
  ],
  dependencies: [
    // 💧 A server-side Swift web framework.
    .package(url: "https://github.com/vapor/vapor.git", from: "4.89.0"),
    // 🗄 An ORM for SQL and NoSQL databases.
    .package(url: "https://github.com/vapor/fluent.git", from: "4.8.0"),
    // 🐘 Fluent driver for Postgres.
    .package(url: "https://github.com/vapor/fluent-postgres-driver.git", from: "2.7.2"),
    // Alias Macro
    .package(url: "https://github.com/p-x9/AliasMacro.git", from: "0.6.0"),
  ],
  targets: [
    .executableTarget(
      name: "App",
      dependencies: [
        .product(name: "Fluent", package: "fluent"),
        .product(name: "FluentPostgresDriver", package: "fluent-postgres-driver"),
        .product(name: "Vapor", package: "vapor"),
        // Alias Macro
        .product(name: "Alias", package: "AliasMacro"),
      ]
    ),
    .testTarget(
      name: "AppTests",
      dependencies: [
        .target(name: "App"),
        .product(name: "XCTVapor", package: "vapor"),

        // Workaround for https://github.com/apple/swift-package-manager/issues/6940
        .product(name: "Vapor", package: "vapor"),
        .product(name: "Fluent", package: "Fluent"),
        .product(name: "FluentPostgresDriver", package: "fluent-postgres-driver"),
      ]),
  ]
)

import Alias
import Fluent
import Vapor

final class Todo: Model, Content {
  static let schema = "todos"

  @ID
  var id: UUID?

  @Alias("カテゴリ")
  @Parent(key: "category_id")
  var category: Category

  @Alias("タイトル")
  @Field(key: "title")
  var title: String

  @Alias("メモ")
  @Field(key: "note")
  var note: String

  @Alias("状態")
  @Enum(key: "state")
  var state: 状態

  @Timestamp(key: "created_at", on: .create)
  var createdAt: Date?

  @Timestamp(key: "updated_at", on: .update)
  var updatedAt: Date?

  init() {}

  init(id: UUID? = nil, categoryId: Category.IDValue, title: String, note: String, state: State) {
    self.id = id
    self.$category.id = categoryId
    self.title = title
    self.note = note
    self.state = state
  }
}

extension Todo {
  @Alias("状態")
  enum State: String, Hashable, Content, CaseIterable {
    @Alias("未完了")
    case todo
    @Alias("進行中")
    case doing
    @Alias("完了")
    case done
  }
}

  /// Todoを変更する
  func update(req: Request) async throws -> HTTPStatus {
    let id = try req.parameters.require("id", as: UUID.self)
    guard let todo = try await Todo.find(id, on: req.db) else {
      throw Abort(.ok, reason: "The todo does not exist")
    }

    try EditTodoJSON.validate(content: req)
    let content = try req.content.decode(EditTodoJSON.self)
    guard let category = try await Category.find(content.categoryId, on: req.db) else {
      throw Abort(.ok, reason: "The category does not exist")
    }

    todo.$category.id = try category.requireID()
    todo.タイトル = content.title
    todo.メモ = content.note
    todo.状態 = content.state
    
    try await todo.update(on: req.db)

    return .noContent
  }