🪄 Adds api service with updates

app/src/lib/api.ts

@@ -0,0 +1,73 @@
+import { user } from '$lib/stores/user';
+import { get } from 'svelte/store';
+import { Err, Ok, type Result } from './utilities';
+
+export namespace api {
+	export function get<TResponse>(endpoint: string, params?: RequestInit) {
+		return sendRequest<TResponse>(endpoint, 'GET', null, params);
+	}
+
+	export function post<TResponse>(endpoint: string, data?: unknown) {
+		return sendRequest<TResponse>(endpoint, 'POST', data);
+	}
+
+	export function put<TResponse>(endpoint: string, data?: unknown) {
+		return sendRequest<TResponse>(endpoint, 'PUT', data);
+	}
+
+	export function remove<TResponse>(endpoint: string) {
+		return sendRequest<TResponse>(endpoint, 'DELETE');
+	}
+}
+
+async function sendRequest<TResponse>(
+	endpoint: string,
+	method: string,
+	data?: unknown,
+	params?: RequestInit
+): Promise<Result<TResponse, Error>> {
+	const user_token = get(user).bearer_token;
+	const body = data !== null && typeof data !== 'undefined' ? JSON.stringify(data) : undefined;
+
+	const request = {
+		...params,
+		method,
+		body,
+		headers: {
+			...params?.headers,
+			Authorization: user_token ? 'Bearer ' + user_token : 'Basic',
+			'Content-Type': 'application/json'
+		}
+	};
+
+	let response;
+
+	try {
+		response = await fetch(endpoint, request);
+	} catch (error) {
+		return Err.new(new Error(), 'An error has occurred');
+	}
+
+	const isResponseOk = response.status >= 200 && response.status < 400;
+	if (!isResponseOk) {
+		if (response.status === 401) {
+			return Err.new(new ApiError(response), 'User was not authorized');
+		}
+		return Err.new(new ApiError(response), 'An error has occurred');
+	}
+
+	const contentType = response.headers.get('Content-Type') ?? response.headers.get('Content-Type');
+	if (contentType && contentType.includes('application/json')) {
+		const data = await response.json();
+		return Ok.new(data as TResponse);
+	} else {
+		// Handle empty object as response
+		return Ok.new(null as TResponse);
+	}
+}
+
+export class ApiError extends Error {
+	constructor(public readonly response: Response) {
+		super(`${response.status}`);
+	}
+}