Implements a service similar to a google-calender.
Java 100.00%
calender-service's Introduction
Calender-Service
Users can enter their shift timings (working hours) or create busy slots. It’s possible for users to have more than one shift in a day.
Users can fetch events of themselves and other users.
Users can create events with other users for a defined start time and end time and delete events created by themselves.
Organizer of an event can fetch the most favorable upcoming empty slot for a given set of users and a particular duration.
For instance user A would like to check the favorable slot with user B, user C to set an event of 4 hours duration. This would require user A to check the upcoming events in his/her calendar as well as for user B, user C.
Users can fetch events where they have conflicts for themselves for a particular day.
Assumptions
For simplicity, Events are starting on same day and ending on same day.
Assuming maximum empty slots that can be found by an organizer is 3, that's a defined constant.
Example
Instantiation of repositories and services
UserRepository userRepository = new InMemoryUserRepository();
ShiftRepository shiftRepository = new InMemoryShiftRepository();
EventRepository eventRepository = new InMemoryEventRepository();
UserService userService = new UserServiceImpl(userRepository);
ShiftService shiftService = new ShiftServiceImpl(userRepository, shiftRepository);
EventService eventService = new EventServiceImpl(userRepository, eventRepository);
Creating a User
// Creating user
User user1 = new User("vibhu", "[email protected]");
user1 = userService.add(user1);
User user2 = new User("arun", "[email protected]");
user2 = userService.add(user2);
// Creating user
Creating Shifts for a User (More than one shift are allowed for a user)
Date date = new Date();
// Add shifts for user1
Shift shift1ForUser1 = new Shift(date, LocalTime.of(9, 0, 0), LocalTime.of(17, 0, 0));
shift1ForUser1 = shiftService.addShiftForUser(user1.getId(), shift1ForUser1);
Shift shift2ForUser1 = new Shift(date, LocalTime.of(18, 0, 0), LocalTime.of(19, 0, 0));
shift2ForUser1 = shiftService.addShiftForUser(user1.getId(), shift2ForUser1);
// Add shifts for user2
Shift shiftForUser2 = new Shift(date, LocalTime.of(10, 0, 0), LocalTime.of(18, 0, 0));
shiftForUser2 = shiftService.addShiftForUser(user2.getId(), shiftForUser2);
Creating events for a user
List<String> participants = new ArrayList<>();
// event e1 where user1 is organizer
participants.add(user2.getId());
Event e1 = eventService.addNewEvent(user1.getId(), "discussion-1 on calender-service", participants, date, LocalTime.of(10, 0, 0), LocalTime.of(11, 0, 0));
participants.clear();
participants.add(user1.getId());
Event e2 = eventService.addNewEvent(user2.getId(), "discussion-2 on calender-service", participants, date, LocalTime.of(10, 0, 0), LocalTime.of(10, 30, 0));
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