Fix missing close price in historical market data of Yahoo Finance service

apps/api/src/services/data-provider/yahoo-finance/yahoo-finance.service.ts

@@ -143,8 +143,7 @@ export class YahooFinanceService implements DataProviderInterface {
     [date: string]: DataProviderHistoricalResponse;
   }> {
     try {
-      const historicalResult = this.convertToHistoricalResult(
-        await this.yahooFinance.chart(
+      const chartResult = await this.yahooFinance.chart(
         this.yahooFinanceDataEnhancerService.convertToYahooFinanceSymbol(
           symbol
         ),
@@ -156,17 +155,27 @@ export class YahooFinanceService implements DataProviderInterface {
             DATE_FORMAT
           )
         }
-        )
       );
 
+      const historicalResult = this.convertToHistoricalResult(chartResult);
+
       const response: {
         [date: string]: DataProviderHistoricalResponse;
       } = {};
 
-      for (const historicalItem of historicalResult) {
-        response[format(historicalItem.date, DATE_FORMAT)] = {
-          marketPrice: historicalItem.close
-        };
+      for (const { close, date } of historicalResult) {
+        // The chart endpoint can omit the close price of a historical item, for
+        // example if the daily data of an exchange has not been consolidated yet.
+        // In this case, the market price of the corresponding quote is taken.
+        const marketPrice =
+          close ??
+          (isSameDay(date, chartResult.meta.regularMarketTime)
+            ? chartResult.meta.regularMarketPrice
+            : undefined);
+
+        if (marketPrice) {
+          response[format(date, DATE_FORMAT)] = { marketPrice };
+        }
       }
 
       return response;