Tamil - Toll free Calculator

Java/.gitignore

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+target
+### IntelliJ IDEA ###
+.idea
+

Java/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.work</groupId>
+    <artifactId>toll-calculator-master</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.json</groupId>
+            <artifactId>json</artifactId>
+            <version>20210307</version>
+        </dependency>
+
+        <!-- junit 5, unit test -->
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+    <build>
+        <finalName>maven-unit-test</finalName>
+        <plugins>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.22.0</version>
+            </plugin>
+
+        </plugins>
+    </build>
+
+</project>

Java/src/main/java/com/work/TollCalculator.java

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+package com.work;
+
+import com.work.exceptions.MissingHolidayDataException;
+import com.work.model.TollFeeTime;
+import com.work.model.vehicles.Vehicle;
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.time.LocalTime;
+import java.time.ZoneId;
+import java.util.*;
+import java.util.concurrent.TimeUnit;
+
+public class TollCalculator {
+
+  private static final int MAX_FEE_PER_DAY = 60;
+  private List<TollFeeTime> tollFeeTimes = null;
+
+  /**
+   * Calculate the total toll fee for one day
+   *
+   * @param vehicle - the vehicle
+   * @param dates   - date and time of all passes on one day
+   * @return - the total toll fee for that day
+   */
+  public int getTollFee(Vehicle vehicle, Date... dates) throws MissingHolidayDataException, IOException {
+
+    if(dates == null || dates.length == 0) return 0;
+    if(vehicle != null && vehicle.isTollFree()) return 0;
+    if(isTollFreeDate(dates[0]))  return 0;
+    if(dates.length == 1){
+       return getTollFee(dates[0]);
+    }
+
+    Date intervalStart = dates[0];
+    int totalFee = 0;
+    int tempFee = 0;
+
+    Arrays.sort(dates);
+
+
+    for (Date date : dates) {
+
+      int nextFee = getTollFee(date);
+
+      TimeUnit timeUnit = TimeUnit.MINUTES;
+      long diffInMillies = date.getTime() - intervalStart.getTime();
+      long minutes = timeUnit.convert(diffInMillies, TimeUnit.MILLISECONDS);
+
+      if (minutes <= 60) {
+        if(nextFee >= tempFee) {
+          totalFee -= tempFee;
+          totalFee += nextFee;
+          tempFee = nextFee;
+        }
+
+      } else {
+        intervalStart = date;
+        tempFee = nextFee;
+        totalFee += nextFee;
+      }
+      if (totalFee >= MAX_FEE_PER_DAY){
+        return MAX_FEE_PER_DAY;
+      }
+
+    }
+    return totalFee;
+  }
+
+  private List<TollFeeTime> getFeeAndTimes() throws IOException {
+    List<TollFeeTime> tollFeeTimesList = new ArrayList<>();
+    try{
+      JSONObject jsonObject = new JSONObject(Files.readString(Paths.get("src/main/resources/TollFees.json")));
+      JSONArray feeTimes =  jsonObject.getJSONArray("feeTimes");
+      feeTimes.forEach(feeTime -> {
+        JSONObject jsonFeeTime = (JSONObject) feeTime;
+        JSONArray timeArray = jsonFeeTime.getJSONArray("time");
+        timeArray.forEach(time -> {
+          TollFeeTime tollFeeTime = new TollFeeTime();
+          JSONObject jsonTime = (JSONObject) time;
+          tollFeeTime.setStartTime(LocalTime.parse(jsonTime.getString("startTime")));
+          tollFeeTime.setEndTime(LocalTime.parse(jsonTime.getString("endTime")));
+          tollFeeTime.setFee(jsonFeeTime.getInt("fee"));
+          tollFeeTimesList.add(tollFeeTime);
+        });
+      });
+    } catch (Exception e){
+      throw new RuntimeException("Exception occurred in getting fee from json", e);
+    }
+
+    return tollFeeTimesList;
+  }
+
+  private int getTollFee(final Date date) throws IOException {
+
+    if(tollFeeTimes == null){
+      tollFeeTimes = getFeeAndTimes();
+    }
+
+    LocalTime localTime = LocalTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
+    Optional<TollFeeTime> optionalTollFeeTime=  tollFeeTimes.stream().filter(tollFeeTime ->
+     tollFeeTime.getStartTime().equals(localTime) || tollFeeTime.getEndTime().equals(localTime) ||
+             (localTime.isAfter(tollFeeTime.getStartTime()) && localTime.isBefore(tollFeeTime.getEndTime()))).findFirst();
+    return optionalTollFeeTime.map(TollFeeTime::getFee).orElse(0);
+  }
+
+  private boolean isTollFreeDate(Date date) throws MissingHolidayDataException {
+    Calendar calendar = GregorianCalendar.getInstance();
+    calendar.setTime(date);
+
+    int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
+    if (dayOfWeek == Calendar.SATURDAY || dayOfWeek == Calendar.SUNDAY) return true;
+
+    int year = calendar.get(Calendar.YEAR);
+    int month = calendar.get(Calendar.MONTH);
+    int day = calendar.get(Calendar.DAY_OF_MONTH);
+    return isHoliday(year, month, day);
+  }
+
+  private boolean isHoliday(int year, int month, int day) throws MissingHolidayDataException {
+
+    try {
+      JSONObject jsonObject = new JSONObject(Files.readString(Paths.get("src/main/resources/Holidays.json")));
+      JSONObject holidays = jsonObject.getJSONObject(String.valueOf(year));
+      if(holidays != null && !holidays.isEmpty()){
+        String monthlyHolidays = holidays.getString(getMonth(month));
+        String[] dateArray = monthlyHolidays.split(",");
+        if(Arrays.asList(dateArray).contains(String.valueOf(day)))
+          return true;
+      }
+
+    }catch (Exception e){
+      throw new MissingHolidayDataException(e.getCause());
+    }
+    return false;
+  }
+
+  private String getMonth (int monthNum){
+    switch (monthNum){
+      case 0: return "January";
+      case 1: return "February";
+      case 2: return "March";
+      case 3: return "April";
+      case 4: return "May";
+      case 5: return "June";
+      case 6: return "July";
+      case 7: return "August";
+      case 8: return "September";
+      case 9: return "October";
+      case 10: return "November";
+      case 11: return "December";
+      default : return "Error";
+    }
+  }
+
+}
+

Java/src/main/java/com/work/exceptions/MissingHolidayDataException.java

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+package com.work.exceptions;
+
+public class MissingHolidayDataException extends Exception {
+    public MissingHolidayDataException(Throwable cause) {
+        super("Unable to get Holiday list for the date", cause);
+    }
+}

Java/src/main/java/com/work/model/TollFeeTime.java

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+package com.work.model;
+
+import java.time.LocalTime;
+
+public class TollFeeTime {
+
+    private LocalTime startTime;
+    private LocalTime endTime;
+    private int fee;
+
+    public LocalTime getStartTime() {
+        return startTime;
+    }
+
+    public void setStartTime(LocalTime startTime) {
+        this.startTime = startTime;
+    }
+
+    public LocalTime getEndTime() {
+        return endTime;
+    }
+
+    public void setEndTime(LocalTime endTime) {
+        this.endTime = endTime;
+    }
+
+    public int getFee() {
+        return fee;
+    }
+
+    public void setFee(int fee) {
+        this.fee = fee;
+    }
+
+}

Java/Car.java → Java/src/main/java/com/work/model/vehicles/Car.java

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-
-public class Car implements Vehicle {
-  @Override
-  public String getType() {
-    return "Car";
-  }
-}
+package com.work.model.vehicles;
+
+public class Car implements Vehicle {
+  @Override
+  public String getType() {
+    return "Car";
+  }
+
+  @Override
+  public boolean isTollFree() {
+    return false;
+  }
+}