01-jv-salary-info

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

@@ -1,7 +1,56 @@
 package core.basesyntax;
 
 public class SalaryInfo {
-    public String getSalaryInfo(String[] names, String[] data, String dateFrom, String dateTo) {
-        return null;
+    static final int intDateStr = 0;
+    static final int intEmployeeName = 1;
+    static final int intHoursWorked = 2;
+    static final int intIncomePerHour = 3;
+
+    public static String getSalaryInfo(String[] names, String[] data,
+                                       String dateFrom, String dateTo) {
+        String dateFromComparable = convertDateToComparable(dateFrom);
+        String dateToComparable = convertDateToComparable(dateTo);
+        int[] totalEarnings = new int[names.length];
+
+        for (String entry : data) {
+            String[] parts = entry.split(" ");
+            String dateStr = parts[intDateStr];
+            String employeeName = parts[intEmployeeName];
+            int hoursWorked = Integer.parseInt(parts[intHoursWorked]);
+            int incomePerHour = Integer.parseInt(parts[intIncomePerHour]);
+
+            String entryDateComparable = convertDateToComparable(dateStr);
+
+            if (entryDateComparable.compareTo(dateFromComparable) >= 0
+                    && entryDateComparable.compareTo(dateToComparable) <= 0) {
+                for (int i = 0; i < names.length; i++) {
+                    if (names[i].equals(employeeName)) {
+                        int earnings = hoursWorked * incomePerHour;
+                        totalEarnings[i] += earnings;
+                        break;
+                    }
+                }
+            }
+        }
+
+        return buildReport(names, totalEarnings, dateFrom, dateTo);
+    }
+
+    private static String buildReport(String[] names, int[] totalEarnings,
+                                      String dateFrom, String dateTo) {
+        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 String convertDateToComparable(String date) {
+        String[] parts = date.split("\\.");
+        return parts[2] + parts[1] + parts[0];
     }
 }