01-jv-salary-info

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

@@ -1,7 +1,55 @@
 package core.basesyntax;
 
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+
 public class SalaryInfo {
-    public String getSalaryInfo(String[] names, String[] data, String dateFrom, String dateTo) {
-        return null;
+    private static final int DATE_STR_INDEX = 0;
+    private static final int EMPLOYEE_NAME_INDEX = 1;
+    private static final int HOURS_WORKED_INDEX = 2;
+    private static final int INCOME_PER_HOUR_INDEX = 3;
+    private static final DateTimeFormatter DATE_FORMATTER =
+            DateTimeFormatter.ofPattern("dd.MM.yyyy");
+
+    public String getSalaryInfo(String[] names, String[] data,
+                                String dateFrom, String dateTo) {
+        LocalDate dateFromComparable = convertDateToComparable(dateFrom);
+        LocalDate dateToComparable = convertDateToComparable(dateTo);
+        int[] totalEarnings = new int[names.length];
+
+        for (String entry : data) {
+            String[] parts = entry.split(" ");
+            String dateStr = parts[DATE_STR_INDEX];
+            String employeeName = parts[EMPLOYEE_NAME_INDEX];
+            int hoursWorked = Integer.parseInt(parts[HOURS_WORKED_INDEX]);
+            int incomePerHour = Integer.parseInt(parts[INCOME_PER_HOUR_INDEX]);
+            LocalDate entryDateComparable = convertDateToComparable(dateStr);
+            if (!entryDateComparable.isBefore(dateFromComparable)
+                    && !entryDateComparable.isAfter(dateToComparable)) {
+                for (int i = 0; i < names.length; i++) {
+                    if (names[i].equals(employeeName)) {
+                        int earnings = hoursWorked * incomePerHour;
+                        totalEarnings[i] += earnings;
+                        break;
+                    }
+                }
+            }
+        }
+
+        StringBuilder report = new StringBuilder();
+        report.append("Report for period ").append(dateFrom)
+                .append(" - ").append(dateTo);
+
+        for (int i = 0; i < names.length; i++) {
+            report.append(System.lineSeparator())
+                    .append(names[i]).append(" - ")
+                    .append(totalEarnings[i]);
+        }
+
+        return report.toString();
+    }
+
+    private static LocalDate convertDateToComparable(String date) {
+        return LocalDate.parse(date, DATE_FORMATTER);
     }
 }