Upload files.

frontend/datafeeds/udf/src/quotes-provider.ts

@@ -0,0 +1,37 @@
+import { UdfQuotesResponse, IQuotesProvider } from './iquotes-provider';
+import { QuoteData } from '../../../charting_library/datafeed-api';
+
+import {
+	getErrorMessage,
+	logMessage,
+	UdfErrorResponse,
+} from './helpers';
+import { IRequester } from './irequester';
+
+export class QuotesProvider implements IQuotesProvider {
+	private readonly _datafeedUrl: string;
+	private readonly _requester: IRequester;
+
+	public constructor(datafeedUrl: string, requester: IRequester) {
+		this._datafeedUrl = datafeedUrl;
+		this._requester = requester;
+	}
+
+	public getQuotes(symbols: string[]): Promise<QuoteData[]> {
+		return new Promise((resolve: (data: QuoteData[]) => void, reject: (reason: string) => void) => {
+			this._requester.sendRequest<UdfQuotesResponse>(this._datafeedUrl, 'quotes', { symbols: symbols })
+				.then((response: UdfQuotesResponse | UdfErrorResponse) => {
+					if (response.s === 'ok') {
+						resolve(response.d);
+					} else {
+						reject(response.errmsg);
+					}
+				})
+				.catch((error?: string | Error) => {
+					const errorMessage = getErrorMessage(error);
+					logMessage(`QuotesProvider: getQuotes failed, error=${errorMessage}`);
+					reject(`network error: ${errorMessage}`);
+				});
+		});
+	}
+}