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import { ApiErrorBody, FetchResponse, HttpError } from "@repo/types/http";
import { type DomainError } from "@repo/effect-utils";
import {
createRequestEffect,
type EffectRequestPolicy,
REQUEST_POLICY,
} from "./effectRequest";
type AuthType = "bearer" | "basic";
interface BasicAuthConfig {
username: string;
password: string;
}
interface AuthConfig {
type: AuthType;
basic?: BasicAuthConfig;
}
interface HttpServiceOptions {
getToken?: () => Promise<string | null>;
auth?: AuthConfig;
effectPolicy?: {
read?: EffectRequestPolicy;
write?: EffectRequestPolicy;
idempotentWrite?: EffectRequestPolicy;
};
}
export class HttpService {
private readonly baseApi: string;
private getToken?: () => Promise<string | null>;
private authConfig?: AuthConfig;
constructor(baseUrl: string, options?: HttpServiceOptions) {
this.baseApi = baseUrl;
this.getToken = options?.getToken;
this.authConfig = options?.auth;
}
private async applyAuth(headers: Record<string, string>) {
if (!this.authConfig) return;
if (this.authConfig.type === "bearer" && this.getToken) {
const token = await this.getToken();
if (token) {
headers.Authorization = `Bearer ${token}`;
}
}
if (this.authConfig.type === "basic" && this.authConfig.basic) {
const { username, password } = this.authConfig.basic;
const encoded = btoa(`${username}:${password}`);
headers.Authorization = `Basic ${encoded}`;
}
}
private async parseBody(res: Response) {
const contentType = res.headers.get("content-type") ?? "";
if (contentType.includes("application/json")) {
return res.json();
}
return res.text();
}
private async request<T, E = ApiErrorBody>(
method: string,
endpoint: string,
body?: unknown,
config?: RequestInit,
): Promise<FetchResponse<T>> {
const headers: Record<string, string> = {
Accept: "application/json",
...(config?.headers as Record<string, string>),
};
const isFormData = body instanceof FormData;
if (!isFormData) {
headers["Content-Type"] = "application/json";
}
await this.applyAuth(headers);
const res = await fetch(`${this.baseApi}${endpoint}`, {
...config,
method,
headers,
body: body ? (isFormData ? body : JSON.stringify(body)) : undefined,
});
const responseData = await this.parseBody(res);
if (!res.ok) {
throw {
ok: false,
status: res.status,
statusText: res.statusText,
data: responseData as E,
} satisfies HttpError<E>;
}
return {
ok: true,
status: res.status,
statusText: res.statusText,
data: responseData as T,
};
}
get<T, E = ApiErrorBody>(endpoint: string, config?: RequestInit) {
return this.request<T, E>("GET", endpoint, undefined, config);
}
post<T, E = ApiErrorBody>(
endpoint: string,
data?: unknown,
config?: RequestInit,
) {
return this.request<T, E>("POST", endpoint, data, config);
}
put<T, E = ApiErrorBody>(
endpoint: string,
data?: unknown,
config?: RequestInit,
) {
return this.request<T, E>("PUT", endpoint, data, config);
}
patch<T, E = ApiErrorBody>(
endpoint: string,
data?: unknown,
config?: RequestInit,
) {
return this.request<T, E>("PATCH", endpoint, data, config);
}
delete<T, E = ApiErrorBody>(endpoint: string, config?: RequestInit) {
return this.request<T, E>("DELETE", endpoint, undefined, config);
}
}
// --- Effect Implementation ---
export interface HttpClient {
readonly get: <T>(
endpoint: string,
config?: RequestInit,
) => Effect.Effect<T, DomainError>;
readonly post: <T>(
endpoint: string,
body?: unknown,
config?: RequestInit,
) => Effect.Effect<T, DomainError>;
readonly put: <T>(
endpoint: string,
body?: unknown,
config?: RequestInit,
) => Effect.Effect<T, DomainError>;
readonly patch: <T>(
endpoint: string,
body?: unknown,
config?: RequestInit,
) => Effect.Effect<T, DomainError>;
readonly delete: <T>(
endpoint: string,
config?: RequestInit,
) => Effect.Effect<T, DomainError>;
}
export const HttpClient = Context.GenericTag<HttpClient>(
"@repo/services/HttpClient",
);
export const makeHttpClient = (
baseUrl: string,
options?: HttpServiceOptions,
) => {
const service = new HttpService(baseUrl, options);
const readPolicy = options?.effectPolicy?.read ?? REQUEST_POLICY.READ;
const writePolicy = options?.effectPolicy?.write ?? REQUEST_POLICY.WRITE;
const idempotentWritePolicy =
options?.effectPolicy?.idempotentWrite ?? REQUEST_POLICY.IDEMPOTENT_WRITE;
const request = <T>(
method: "GET" | "POST" | "PUT" | "PATCH" | "DELETE",
endpoint: string,
body?: unknown,
config?: RequestInit,
) =>
createRequestEffect(
async () => {
const response = await (method === "GET" || method === "DELETE"
? service[method.toLowerCase() as "get" | "delete"]<T>(
endpoint,
config,
)
: service[method.toLowerCase() as "post" | "put" | "patch"]<T>(
endpoint,
body,
config,
));
return response.data;
},
method === "GET"
? readPolicy
: method === "DELETE"
? idempotentWritePolicy
: writePolicy,
);
return HttpClient.of({
get: (endpoint, config) => request("GET", endpoint, undefined, config),
post: (endpoint, body, config) => request("POST", endpoint, body, config),
put: (endpoint, body, config) => request("PUT", endpoint, body, config),
patch: (endpoint, body, config) => request("PATCH", endpoint, body, config),
delete: (endpoint, config) =>
request("DELETE", endpoint, undefined, config),
});
};
export const HttpClientLive = (baseUrl: string, options?: HttpServiceOptions) =>
Layer.succeed(HttpClient, makeHttpClient(baseUrl, options));
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