Class GitLabFetcher

extensions/github1s/src/adapters/gitlab1s/fetcher.ts:45–137

const PREFER_SOURCEGRAPH_API = 'PREFER_SOURCEGRAPH_API';

export class GitLabFetcher {
	private static instance: GitLabFetcher | null = null;
	private _emitter = new vscode.EventEmitter<boolean | null | undefined>();
	public onDidChangePreferSourcegraphApi = this._emitter.event;
	private _currentRepoPromise: Promise<any> | null = null;

	public static getInstance(): GitLabFetcher {
		if (GitLabFetcher.instance) {
			return GitLabFetcher.instance;
		}
		return (GitLabFetcher.instance = new GitLabFetcher());
	}

	private constructor() {
		this.initPreferSourcegraphApi();
		GitLabTokenManager.getInstance().onDidChangeToken(() => this.initPreferSourcegraphApi());
	}

	private _request = reuseable(
		(
			command: string,
			params: Record<string, string | number | boolean | undefined>,
		): Promise<{ status: number; data: any; headers: Headers }> => {
			// eslint-disable-next-line prefer-const
			let [method, path] = command.split(/\s+/).filter(Boolean);
			Object.keys(params).forEach((el) => {
				path = path.replace(`{${el}}`, `${encodeURIComponent(params[el] || '')}`);
			});
			const accessToken = GitLabTokenManager.getInstance().getToken();
			const fetchOptions: { headers: Record<string, string> } =
				accessToken?.length < 60
					? { headers: { 'PRIVATE-TOKEN': `${accessToken}` } }
					: { headers: { Authorization: `Bearer ${accessToken}` } };
			return fetch(GITLAB_API_PREFIX + path, {
				...fetchOptions,
				method,
			}).then(async (response: Response & { data: any }) => {
				response.data = await response.json();
				return response.ok ? response : Promise.reject({ response });
			});
		},
	);

	public request = (command: string, params: Record<string, string | number | boolean | undefined>) => {
		return this._request(command, params).catch(async (error: { response: any }) => {
			const errorStatus = error?.response?.status as number | undefined;
			const repoNotFound = errorStatus === 404 && !(await this.resolveCurrentRepo());
			if ((errorStatus && [401, 403].includes(errorStatus)) || repoNotFound) {
				// maybe we have to acquire github access token to continue
				const accessToken = GitLabTokenManager.getInstance().getToken();
				const message = detectErrorMessage(error?.response, !!accessToken);
				await GitLab1sAuthenticationView.getInstance().open(message, true);
				return this._request(command, params);
			}
			throw error;
		});
	};