create a calculate for employees

src/main/java/core/basesyntax/SalaryInfo.java

@@ -1,7 +1,48 @@
 package core.basesyntax;
 
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+
 public class SalaryInfo {
+    private static final int DATE_INDEX = 0;
+    private static final int NAME_INDEX = 1;
+    private static final int HOUR_INDEX = 2;
+    private static final int RATE_INDEX = 3;
+    private static final DateTimeFormatter DATE_FORMATTER
+            = DateTimeFormatter.ofPattern("dd.MM.yyyy");
+
     public String getSalaryInfo(String[] names, String[] data, String dateFrom, String dateTo) {
-        return null;
+        LocalDate fromDate = LocalDate.parse(dateFrom, DATE_FORMATTER);
+        LocalDate toDate = LocalDate.parse(dateTo, DATE_FORMATTER);
+
+        StringBuilder reportLines = new StringBuilder();
+        reportLines.append("Report for period ").append(dateFrom).append(" - ").append(dateTo);
+        for (String name : names) {
+            int earned = calculateEarnedSalary(name, data, fromDate, toDate);
+            reportLines.append(System.lineSeparator()).append(name).append(" - ").append(earned);
+        }
+        return reportLines.toString();
+    }
+
+    private int calculateEarnedSalary(String name, String[] data,
+                                      LocalDate fromDate, LocalDate toDate) {
+        int earned = 0;
+        for (String entry : data) {
+            String[] parts = entry.split(" ");
+            LocalDate entryDate = LocalDate.parse(parts[DATE_INDEX], DATE_FORMATTER);
+            if (isWithinDateRange(name, entryDate, fromDate, toDate, parts)) {
+                int hours = Integer.parseInt(parts[HOUR_INDEX]);
+                int rate = Integer.parseInt(parts[RATE_INDEX]);
+                earned += hours * rate;
+            }
+        }
+        return earned;
+    }
+
+    private boolean isWithinDateRange(String name, LocalDate entryDate, LocalDate fromDate,
+                                      LocalDate toDate, String[] parts) {
+        return name.equals(parts[NAME_INDEX])
+                && !entryDate.isBefore(fromDate)
+                && !entryDate.isAfter(toDate);
     }
 }