Complete backend functionality

src/main/java/com/example/nto/service/impl/BookingServiceImpl.java

@@ -1,6 +1,18 @@
 package com.example.nto.service.impl;
 
+import com.example.nto.entity.Booking;
+import com.example.nto.entity.Employee;
+import com.example.nto.entity.Place;
+import com.example.nto.repository.BookingRepository;
 import com.example.nto.service.BookingService;
+import io.micrometer.common.lang.Nullable;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDate;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.StreamSupport;
 
 /**
  * TODO: ДОРАБОТАТЬ в рамках задания
@@ -8,5 +20,29 @@ import com.example.nto.service.BookingService;
  * МОЖНО: Добавлять методы, аннотации, зависимости
  * НЕЛЬЗЯ: Изменять название класса и пакета
  */
+@Service
 public class BookingServiceImpl implements BookingService {
+    @Autowired
+    private BookingRepository bookingRepository;
+
+    @Override
+    @Nullable
+    public Booking getById(Long id) {
+        return bookingRepository.findById(id).orElseGet(() -> null);
+    }
+
+    @Override
+    public List<Booking> getAll() {
+        return StreamSupport.stream(bookingRepository.findAll().spliterator(), false).collect(Collectors.toList());
+    }
+
+    @Override
+    public void save(LocalDate date, Place place, Employee employee) {
+        var booking = Booking.builder()
+                .date(date)
+                .place(place)
+                .employee(employee)
+                .build();
+        bookingRepository.save(booking);
+    }
 }