feat: implement salary calculation

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

@@ -1,7 +1,43 @@
 package core.basesyntax;
 
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+
 public class SalaryInfo {
+    private static final DateTimeFormatter FORMATTER =
+            DateTimeFormatter.ofPattern("dd.MM.yyyy");
+
     public String getSalaryInfo(String[] names, String[] data, String dateFrom, String dateTo) {
-        return null;
+        LocalDate from = LocalDate.parse(dateFrom, FORMATTER);
+        LocalDate to = LocalDate.parse(dateTo, FORMATTER);
+
+        StringBuilder builder = new StringBuilder("Report for period ");
+        builder.append(dateFrom)
+                .append(" - ")
+                .append(dateTo);
+
+        for (String name : names) {
+            int salary = 0;
+
+            for (String record : data) {
+                String[] parts = record.split(" ");
+                LocalDate currentDate = LocalDate.parse(parts[0], FORMATTER);
+                String employeeName = parts[1];
+                int hours = Integer.parseInt(parts[2]);
+                int rate = Integer.parseInt(parts[3]);
+
+                if (employeeName.equals(name)
+                        && !currentDate.isAfter(to)
+                        && !currentDate.isBefore(from)) {
+                    salary += hours * rate;
+                }
+            }
+
+            builder.append(System.lineSeparator())
+                    .append(name)
+                    .append(" - ")
+                    .append(salary);
+        }
+        return builder.toString();
     }
 }