127 lines
3.3 KiB
TypeScript
127 lines
3.3 KiB
TypeScript
import { Endpoints } from "./api.types";
|
|
|
|
const MK_API_ERROR = Symbol();
|
|
|
|
export type APIError = {
|
|
id: string;
|
|
code: string;
|
|
message: string;
|
|
kind: "client" | "server";
|
|
info: Record<string, any>;
|
|
};
|
|
|
|
export function isAPIError(reason: any): reason is APIError {
|
|
return reason[MK_API_ERROR] === true;
|
|
}
|
|
|
|
export type FetchLike = (
|
|
input: string,
|
|
init?: {
|
|
method?: string;
|
|
body?: string;
|
|
credentials?: RequestCredentials;
|
|
cache?: RequestCache;
|
|
},
|
|
) => Promise<{
|
|
status: number;
|
|
json(): Promise<any>;
|
|
}>;
|
|
|
|
type IsNeverType<T> = [T] extends [never] ? true : false;
|
|
|
|
type StrictExtract<Union, Cond> = Cond extends Union ? Union : never;
|
|
|
|
type IsCaseMatched<
|
|
E extends keyof Endpoints,
|
|
P extends Endpoints[E]["req"],
|
|
C extends number,
|
|
> = IsNeverType<
|
|
StrictExtract<Endpoints[E]["res"]["$switch"]["$cases"][C], [P, any]>
|
|
> extends false
|
|
? true
|
|
: false;
|
|
|
|
type GetCaseResult<
|
|
E extends keyof Endpoints,
|
|
P extends Endpoints[E]["req"],
|
|
C extends number,
|
|
> = StrictExtract<Endpoints[E]["res"]["$switch"]["$cases"][C], [P, any]>[1];
|
|
|
|
export class APIClient {
|
|
public origin: string;
|
|
public credential: string | null | undefined;
|
|
public fetch: FetchLike;
|
|
|
|
constructor(opts: {
|
|
origin: APIClient["origin"];
|
|
credential?: APIClient["credential"];
|
|
fetch?: APIClient["fetch"] | null | undefined;
|
|
}) {
|
|
this.origin = opts.origin;
|
|
this.credential = opts.credential;
|
|
// ネイティブ関数をそのまま変数に代入して使おうとするとChromiumではIllegal invocationエラーが発生するため、
|
|
// 環境で実装されているfetchを使う場合は無名関数でラップして使用する
|
|
this.fetch = opts.fetch || ((...args) => fetch(...args));
|
|
}
|
|
|
|
public request<E extends keyof Endpoints, P extends Endpoints[E]["req"]>(
|
|
endpoint: E,
|
|
params: P = {} as P,
|
|
credential?: string | null | undefined,
|
|
): Promise<
|
|
Endpoints[E]["res"] extends {
|
|
$switch: { $cases: [any, any][]; $default: any };
|
|
}
|
|
? IsCaseMatched<E, P, 0> extends true
|
|
? GetCaseResult<E, P, 0>
|
|
: IsCaseMatched<E, P, 1> extends true
|
|
? GetCaseResult<E, P, 1>
|
|
: IsCaseMatched<E, P, 2> extends true
|
|
? GetCaseResult<E, P, 2>
|
|
: IsCaseMatched<E, P, 3> extends true
|
|
? GetCaseResult<E, P, 3>
|
|
: IsCaseMatched<E, P, 4> extends true
|
|
? GetCaseResult<E, P, 4>
|
|
: IsCaseMatched<E, P, 5> extends true
|
|
? GetCaseResult<E, P, 5>
|
|
: IsCaseMatched<E, P, 6> extends true
|
|
? GetCaseResult<E, P, 6>
|
|
: IsCaseMatched<E, P, 7> extends true
|
|
? GetCaseResult<E, P, 7>
|
|
: IsCaseMatched<E, P, 8> extends true
|
|
? GetCaseResult<E, P, 8>
|
|
: IsCaseMatched<E, P, 9> extends true
|
|
? GetCaseResult<E, P, 9>
|
|
: Endpoints[E]["res"]["$switch"]["$default"]
|
|
: Endpoints[E]["res"]
|
|
> {
|
|
const promise = new Promise((resolve, reject) => {
|
|
this.fetch(`${this.origin}/api/${endpoint}`, {
|
|
method: "POST",
|
|
body: JSON.stringify({
|
|
...params,
|
|
i: credential !== undefined ? credential : this.credential,
|
|
}),
|
|
credentials: "omit",
|
|
cache: "no-cache",
|
|
})
|
|
.then(async (res) => {
|
|
const body = res.status === 204 ? null : await res.json();
|
|
|
|
if (res.status === 200) {
|
|
resolve(body);
|
|
} else if (res.status === 204) {
|
|
resolve(null);
|
|
} else {
|
|
reject({
|
|
[MK_API_ERROR]: true,
|
|
...body.error,
|
|
});
|
|
}
|
|
})
|
|
.catch(reject);
|
|
});
|
|
|
|
return promise as any;
|
|
}
|
|
}
|