| 1 | import HTTPTypes |
| 2 | import Hummingbird |
| 3 | |
| 4 | /// `make bump` changes this text so the next build has to recompile this |
| 5 | /// file, the one holding the `GET /` handler; `make unbump` puts it back. |
| 6 | let bumpNote = "unbumped" |
| 7 | |
| 8 | /// The request header the page's JavaScript sends with each action. With |
| 9 | /// it, an action answers 200 with the new `section.main` and |
| 10 | /// `footer.footer` instead of 303. |
| 11 | let partialHeader = HTTPField.Name("X-Todo-Partial")! |
| 12 | |
| 13 | /// Every route the contract lists. |
| 14 | struct Routes: Sendable { |
| 15 | let store: Store |
| 16 | let visitors: Visitors |
| 17 | let version: String |
| 18 | |
| 19 | func register(on router: Router<BasicRequestContext>) { |
| 20 | router.get("/healthz") { _, _ in "ok\n" } |
| 21 | router.get("/api/version") { _, _ in self.version } |
| 22 | |
| 23 | router.get("/static/base.css") { _, _ in Assets.response(Assets.baseCSS, type: "text/css; charset=utf-8") } |
| 24 | router.get("/static/index.css") { _, _ in Assets.response(Assets.indexCSS, type: "text/css; charset=utf-8") } |
| 25 | router.get("/static/app.css") { _, _ in Assets.response(Assets.appCSS, type: "text/css; charset=utf-8") } |
| 26 | router.get("/static/app.js") { _, _ in Assets.response(Assets.appJS, type: "text/javascript; charset=utf-8") } |
| 27 | |
| 28 | for filter in Filter.allCases { |
| 29 | router.get(RouterPath(filter.path)) { request, _ in |
| 30 | try await self.page(request, filter: filter) |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | router.post("/todos") { request, context in |
| 35 | try await self.action(request, context) { list, form in |
| 36 | let title = form.title?.trimmingWhitespace() ?? "" |
| 37 | if !title.isEmpty { try await self.store.add(list: list, title: title) } |
| 38 | return true |
| 39 | } |
| 40 | } |
| 41 | router.post("/todos/toggle-all") { request, context in |
| 42 | try await self.action(request, context) { list, _ in |
| 43 | try await self.store.toggleAll(list: list) |
| 44 | return true |
| 45 | } |
| 46 | } |
| 47 | router.post("/todos/clear-completed") { request, context in |
| 48 | try await self.action(request, context) { list, _ in |
| 49 | try await self.store.clearCompleted(list: list) |
| 50 | return true |
| 51 | } |
| 52 | } |
| 53 | router.post("/todos/:id/toggle") { request, context in |
| 54 | let id = try context.parameters.require("id", as: Int.self) |
| 55 | return try await self.action(request, context) { list, _ in |
| 56 | try await self.store.toggle(list: list, id: id) |
| 57 | } |
| 58 | } |
| 59 | router.post("/todos/:id/edit") { request, context in |
| 60 | let id = try context.parameters.require("id", as: Int.self) |
| 61 | return try await self.action(request, context) { list, form in |
| 62 | let title = form.title?.trimmingWhitespace() ?? "" |
| 63 | return title.isEmpty |
| 64 | ? try await self.store.destroy(list: list, id: id) |
| 65 | : try await self.store.rename(list: list, id: id, title: title) |
| 66 | } |
| 67 | } |
| 68 | router.post("/todos/:id/destroy") { request, context in |
| 69 | let id = try context.parameters.require("id", as: Int.self) |
| 70 | return try await self.action(request, context) { list, _ in |
| 71 | try await self.store.destroy(list: list, id: id) |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | /// `GET /`, `/active` and `/completed`, with `?edit=<id>` opening that |
| 77 | /// item's editor. |
| 78 | func page(_ request: Request, filter: Filter) async throws -> Response { |
| 79 | let visitor = try await visitors.resolve(request) |
| 80 | let todos = try await store.todos(list: visitor.list) |
| 81 | let editing = request.uri.queryParameters["edit"].flatMap { Int(String($0)) } |
| 82 | let html = Page.document(todos: todos, filter: filter, editing: editing, version: version) |
| 83 | var response = Response.html(html) |
| 84 | visitors.attach(visitor, to: &response) |
| 85 | return response |
| 86 | } |
| 87 | |
| 88 | struct Form: Decodable { |
| 89 | var title: String? |
| 90 | var filter: String? |
| 91 | } |
| 92 | |
| 93 | /// Runs one form action for the caller's own list. `change` answers |
| 94 | /// false when the item it names isn't in that list, which is a 404. |
| 95 | func action( |
| 96 | _ request: Request, |
| 97 | _ context: BasicRequestContext, |
| 98 | change: (Int, Form) async throws -> Bool |
| 99 | ) async throws -> Response { |
| 100 | var request = request |
| 101 | let body = try await request.collectBody(upTo: context.maxUploadSize) |
| 102 | guard let form = try? URLEncodedFormDecoder().decode(Form.self, from: String(buffer: body)) else { |
| 103 | throw HTTPError(.badRequest, message: "Expected a form.") |
| 104 | } |
| 105 | let filter = Filter(field: form.filter) |
| 106 | let visitor = try await visitors.resolve(request) |
| 107 | |
| 108 | var response: Response |
| 109 | if try await change(visitor.list, form) { |
| 110 | if request.headers[partialHeader] != nil { |
| 111 | let todos = try await store.todos(list: visitor.list) |
| 112 | response = .html(Page.body(todos: todos, filter: filter, editing: nil)) |
| 113 | } else { |
| 114 | response = Response(status: .seeOther, headers: [.location: filter.path]) |
| 115 | } |
| 116 | } else { |
| 117 | response = Response(status: .notFound, headers: [.contentType: "text/plain; charset=utf-8"], |
| 118 | body: .init(byteBuffer: ByteBuffer(string: "No such item in your list.\n"))) |
| 119 | } |
| 120 | visitors.attach(visitor, to: &response) |
| 121 | return response |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | extension Response { |
| 126 | static func html(_ html: String) -> Response { |
| 127 | Response( |
| 128 | status: .ok, |
| 129 | headers: [.contentType: "text/html; charset=utf-8", .cacheControl: "no-store"], |
| 130 | body: .init(byteBuffer: ByteBuffer(string: html)) |
| 131 | ) |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | extension String { |
| 136 | func trimmingWhitespace() -> String { |
| 137 | String(self[...].trimmingWhitespace()) |
| 138 | } |
| 139 | } |
| 140 | |
amadan