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Add TypeSpec example for iRacing data API
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‎examples/iracing-typespec/README.md‎

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# iRacing `/data` API (TypeSpec)
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This example ports a small slice of the `/data` API schema into [TypeSpec](https://microsoft.github.io/typespec/). It mirrors
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structures from `@iracing-data/api-schema` and the OpenAPI generator in `@iracing-data/api-schema-to-openapi`, but uses TypeSpec's
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native emitters to produce OpenAPI definitions.
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## Getting started
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Install dependencies and compile the TypeSpec project:
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```bash
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pnpm install
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pnpm --filter @examples/iracing-typespec build
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```
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The included `tspconfig.yaml` is configured to emit OpenAPI v3.1 JSON into `./dist/iracing.typespec.openapi.json`.
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## Project layout
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- `main.tsp` — The TypeSpec surface area that maps `/data` endpoints to operations.
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- `tspconfig.yaml` — Configures the OpenAPI emitter and lints with the standard HTTP/REST rules.
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- `package.json` — Declares the TypeSpec toolchain dependencies.

‎examples/iracing-typespec/main.tsp‎

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import "@typespec/http";
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import "@typespec/openapi3";
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import "@typespec/rest";
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using TypeSpec.Http;
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using TypeSpec.Rest;
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@service({
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title: "iRacing `/data` API (TypeSpec)",
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version: "0.0.1",
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})
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@server("https://members-ng.iracing.com", "iRacing members data service")
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@route("/data")
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namespace IRacingDataApi {
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@doc("Headers included with every successful or rate-limited response.")
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model RateLimitHeaders {
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@header("x-ratelimit-limit")
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rateLimit?: int64;
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@header("x-ratelimit-remaining")
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remaining?: int64;
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@header("x-ratelimit-reset")
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resetAt?: int64;
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}
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@doc("Response returned for successful `/data` calls, pointing to cached data.")
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model DataTicket {
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@doc("A link to the cached data")
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link: url;
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@doc("When the cached data expires")
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expires: utcDateTime;
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}
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@doc("Errors returned by the `/data` endpoints.")
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model ErrorResponse {
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error: string;
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message?: string;
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note?: string;
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}
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model SuccessResponse extends RateLimitHeaders {
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@statusCode status: 200;
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@body body: DataTicket;
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}
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model UnauthorizedResponse {
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@statusCode status: 401;
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@body body: ErrorResponse;
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}
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model RateLimitedResponse extends RateLimitHeaders {
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@statusCode status: 429;
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@body body: ErrorResponse;
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}
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model MaintenanceResponse {
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@statusCode status: 503;
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@body body: ErrorResponse;
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}
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alias ApiResponses =
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| SuccessResponse
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| UnauthorizedResponse
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| RateLimitedResponse
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| MaintenanceResponse;
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@doc("iRacing Event Type")
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enum EventType {
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@doc("Practice")
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practice: 2,
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@doc("Qualifying")
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qualifying: 3,
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@doc("Time trial")
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timeTrial: 4,
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@doc("Race")
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race: 5,
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}
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@doc("Racing category.")
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enum Category {
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@doc("Oval discipline")
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oval: "oval",
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@doc("Road discipline. Legacy, use `sports_car` or `formula_car` instead.")
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road: "road",
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@doc("Dirt road discipline.")
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dirtRoad: "dirt_road",
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@doc("Dirt oval discipline.")
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dirtOval: "dirt_oval",
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@doc("Sports car discipline.")
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sportsCar: "sports_car",
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@doc("Formula car discipline.")
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formulaCar: "formula_car",
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}
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@tag("constants")
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@route("/constants")
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interface Constants {
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@get("/event_types")
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@doc("Constant; returned directly as an array of objects")
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getEventTypes(): ApiResponses;
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@get("/categories")
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@doc("List the current iRacing racing categories.")
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getCategories(): ApiResponses;
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@get("/divisions")
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@doc("List license divisions for the active season.")
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getDivisions(): ApiResponses;
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}
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@tag("car")
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@route("/car")
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interface Cars {
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@get("/get")
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@doc("Retrieve the cached payload for an iRacing car.")
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getCar(): ApiResponses;
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@get("/assets")
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@doc("Return a link to the media assets for cars.")
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getCarAssets(): ApiResponses;
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}
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@tag("doc")
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@route("/doc")
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interface Documentation {
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@get
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@doc("List `/data` services, mirroring the behaviour described by the Zod schema.")
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getServices(): ApiResponses;
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@get("/car")
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@doc("Describe car-related `/data` endpoints.")
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getCarDocs(): ApiResponses;
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}
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}

‎examples/iracing-typespec/package.json‎

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{
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"name": "@examples/iracing-typespec",
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"version": "0.0.1",
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"private": true,
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"description": "TypeSpec sketch of the iRacing /data API emitting OpenAPI definitions.",
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"scripts": {
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"build": "tsp compile ."
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},
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"devDependencies": {
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"@typespec/compiler": "^0.65.0",
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"@typespec/http": "^0.65.0",
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"@typespec/openapi3": "^0.65.0",
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"@typespec/rest": "^0.65.0"
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}
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}

‎examples/iracing-typespec/tspconfig.yaml‎

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emit:
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- "@typespec/openapi3"
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options:
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output-dir: "./dist"
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"@typespec/openapi3":
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output-file: "iracing.typespec.openapi.json"
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new-line: lf
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linter:
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extends: ["@typespec/rest", "@typespec/http"]

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