Feature/improve handling of scraper configuration (#757)

* Improve handling of missing scraper configuration

* Update changelog

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Changed
+
+- Improved the error handling in the scraper configuration
+
 ## 1.126.0 - 14.03.2022
 
 ### Added

apps/api/src/services/data-provider/ghostfolio-scraper-api/ghostfolio-scraper-api.service.ts

@@ -50,16 +50,18 @@ export class GhostfolioScraperApiService implements DataProviderInterface {
       const [symbolProfile] = await this.symbolProfileService.getSymbolProfiles(
         [symbol]
       );
-      const scraperConfiguration = symbolProfile?.scraperConfiguration;
+      const { selector, url } = symbolProfile.scraperConfiguration;
 
-      const get = bent(scraperConfiguration?.url, 'GET', 'string', 200, {});
+      if (selector === undefined || url === undefined) {
+        return {};
+      }
+
+      const get = bent(url, 'GET', 'string', 200, {});
 
       const html = await get();
       const $ = cheerio.load(html);
 
-      const value = this.extractNumberFromString(
+      const value = this.extractNumberFromString($(selector).text());
-        $(scraperConfiguration?.selector).text()
-      );
 
       return {
         [symbol]: {