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Merge pull request #18 from deco-cx/feat/clients
feat: use the new http client implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,151 @@ | ||
| import { RequestInit } from "$live/runtime/fetch/mod.ts"; | ||
| import { fetchSafe } from "./fetch.ts"; | ||
|
|
||
| const HTTP_VERBS = new Set( | ||
| [ | ||
| "GET", | ||
| "PUT", | ||
| "POST", | ||
| "DELETE", | ||
| "PATCH", | ||
| "HEAD", | ||
| ] as const, | ||
| ); | ||
|
|
||
| export class HttpError extends Error { | ||
| constructor(public status: number, message?: string, options?: ErrorOptions) { | ||
| super(message, options); | ||
| this.name = `HttpError ${status}`; | ||
| } | ||
| } | ||
|
|
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| export interface TypedRequestInit<T> extends Omit<RequestInit, "body"> { | ||
| body: T; | ||
| } | ||
|
|
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| export interface TypedResponse<T> extends Response { | ||
| json: () => Promise<T>; | ||
| } | ||
|
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| type HttpVerb = typeof HTTP_VERBS extends Set<infer Verb> ? Verb : never; | ||
|
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| type URLPatternParam = string | number; | ||
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| type URLPatternParams<URL extends string> = URL extends | ||
| `/:${infer param}/${infer rest}` | ||
| ? { [key in param]: URLPatternParam } & URLPatternParams<`/${rest}`> | ||
| : URL extends `/:${infer param}?` ? { [key in param]?: URLPatternParam } | ||
| : URL extends `/:${infer param}` ? { [key in param]: URLPatternParam } | ||
| : URL extends `/*?` ? { "*"?: URLPatternParam | URLPatternParam[] } | ||
| : URL extends `/*` ? { "*": URLPatternParam | URLPatternParam[] } | ||
| : URL extends `/*${infer param}?` | ||
| ? { [key in param]: URLPatternParam | URLPatternParam[] } | ||
| : URL extends `/*${infer param}` | ||
| ? { [key in param]: URLPatternParam | URLPatternParam[] } | ||
| : URL extends `/${string}/${infer rest}` ? URLPatternParams<`/${rest}`> | ||
| : {}; | ||
|
|
||
| type ClientOf<T> = { | ||
| [key in (keyof T) & `${HttpVerb} /${string}`]: key extends | ||
| `${HttpVerb} /${infer path}` ? T[key] extends { | ||
| response?: infer ResBody; | ||
| body: infer ReqBody; | ||
| searchParams?: infer Params; | ||
| } ? ( | ||
| params: URLPatternParams<`/${path}`> & Params, | ||
| init: TypedRequestInit<ReqBody>, | ||
| ) => Promise<TypedResponse<ResBody>> | ||
| : T[key] extends { | ||
| response?: infer ResBody; | ||
| searchParams?: infer Params; | ||
| } ? ( | ||
| params: URLPatternParams<`/${path}`> & Params, | ||
| init?: Omit<RequestInit, "body">, | ||
| ) => Promise<TypedResponse<ResBody>> | ||
| : never | ||
| : never; | ||
| }; | ||
|
|
||
| export interface HttpClientOptions { | ||
| base: string; | ||
| headers?: Headers; | ||
| fetcher?: typeof fetch; | ||
| } | ||
|
|
||
| export const createHttpClient = <T>({ | ||
| base, | ||
| headers: defaultHeaders, | ||
| fetcher = fetchSafe, | ||
| }: HttpClientOptions): ClientOf<T> => | ||
| new Proxy({} as ClientOf<T>, { | ||
| get: (_target, prop) => { | ||
| if (typeof prop !== "string") { | ||
| throw new TypeError(`HttpClient: Uknown path ${typeof prop}`); | ||
| } | ||
|
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| const [method, path] = prop.split(" "); | ||
|
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| // @ts-expect-error if not inside, throws | ||
| if (!HTTP_VERBS.has(method)) { | ||
| throw new TypeError(`HttpClient: Verb ${method} is not allowed`); | ||
| } | ||
|
|
||
| return ( | ||
| params: Record<string, string | number | string[] | number[]>, | ||
| init: RequestInit, | ||
| ) => { | ||
| const mapped = new Map(Object.entries(params)); | ||
|
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||
| const compiled = path | ||
| .split("/") | ||
| .flatMap((segment) => { | ||
| const isTemplate = segment.at(0) === ":" || segment.at(0) === "*"; | ||
| const isRequred = segment.at(-1) !== "?"; | ||
|
|
||
| if (!isTemplate) { | ||
| return segment; | ||
| } | ||
|
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| const name = segment.slice(1, !isRequred ? -1 : undefined); | ||
| const param = mapped.get(name); | ||
| mapped.delete(name); | ||
|
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| if (param === undefined && isRequred) { | ||
| throw new TypeError(`HttpClient: Missing ${name} at ${path}`); | ||
| } | ||
|
|
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| return param; | ||
| }) | ||
| .filter((s) => s !== undefined) | ||
| .join("/"); | ||
|
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| const url = new URL(compiled, base); | ||
| mapped.forEach((value, key) => { | ||
| const arrayed = Array.isArray(value) ? value : [value]; | ||
| arrayed.forEach((item) => url.searchParams.append(key, `${item}`)); | ||
| }); | ||
|
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| const shouldStringifyBody = init.body != null && | ||
| typeof init.body !== "string" && | ||
| !(init.body instanceof ReadableStream) && | ||
| !(init.body instanceof FormData) && | ||
| !(init.body instanceof URLSearchParams) && | ||
| !(init.body instanceof Blob) && | ||
| !(init.body instanceof ArrayBuffer); | ||
|
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| const headers = new Headers(init.headers); | ||
| defaultHeaders?.forEach((value, key) => headers.set(key, value)); | ||
|
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| const body = shouldStringifyBody | ||
| ? JSON.stringify(init.body) | ||
| : undefined; | ||
|
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| return fetcher(url, { | ||
| ...init, | ||
| headers, | ||
| method, | ||
| body, | ||
| }); | ||
| }; | ||
| }, | ||
| }); |
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