src/main/java/com/primefactorsolutions/repositories/TimeOffRequestRepository.java

@@ -3,7 +3,9 @@ package com.primefactorsolutions.repositories;
 import com.primefactorsolutions.model.TimeOffRequest;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
 import java.util.UUID;
 
 public interface TimeOffRequestRepository extends JpaRepository<TimeOffRequest, UUID> {
+    List<TimeOffRequest> findByEmployee_Id(UUID id_employee);
 }

src/main/java/com/primefactorsolutions/service/TimeOffRequestService.java

@@ -85,4 +85,8 @@ public class TimeOffRequestService {
         int end = Math.min(start + pageSize, timeOffRequests.size());
         return timeOffRequests.subList(start, end);
     }
+
+    public List<TimeOffRequest> findRequestsByEmployeeId(UUID id_employee) {
+        return timeOffRequestRepository.findByEmployee_Id(id_employee);
+    }
 }

src/main/java/com/primefactorsolutions/views/RequestView.java

@@ -0,0 +1,193 @@
+package com.primefactorsolutions.views;
+
+import com.primefactorsolutions.model.Employee;
+import com.primefactorsolutions.model.TimeOffRequest;
+import com.primefactorsolutions.model.TimeOffRequestType;
+import com.primefactorsolutions.service.EmployeeService;
+import com.primefactorsolutions.service.TimeOffRequestService;
+import com.vaadin.flow.component.button.Button;
+import com.vaadin.flow.component.combobox.ComboBox;
+import com.vaadin.flow.component.grid.GridSortOrder;
+import com.vaadin.flow.component.html.Div;
+import com.vaadin.flow.component.html.H3;
+import com.vaadin.flow.component.html.Span;
+import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
+import com.vaadin.flow.component.orderedlayout.VerticalLayout;
+import com.vaadin.flow.data.provider.SortDirection;
+import com.vaadin.flow.router.BeforeEvent;
+import com.vaadin.flow.router.HasUrlParameter;
+import com.vaadin.flow.router.PageTitle;
+import com.vaadin.flow.router.Route;
+import com.vaadin.flow.spring.annotation.SpringComponent;
+import jakarta.annotation.security.PermitAll;
+import org.apache.commons.beanutils.BeanComparator;
+import org.springframework.context.annotation.Scope;
+import org.vaadin.firitin.components.grid.PagingGrid;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+@SpringComponent
+@PermitAll
+@Scope("prototype")
+@PageTitle("Request")
+@Route(value = "/requests", layout = MainLayout.class)
+public class RequestView extends Div implements HasUrlParameter<String> {
+
+    private final TimeOffRequestService requestService;
+    private final EmployeeService employeeService;
+    private final PagingGrid<TimeOffRequest> requestGrid = new PagingGrid<>(TimeOffRequest.class);
+    private List<TimeOffRequest> requests;
+    private ComboBox<TimeOffRequestType> categoryFilter;
+    private ComboBox<TimeOffRequest.Status> stateFilter;
+    private UUID employeeId;
+
+    public RequestView(TimeOffRequestService requestService, EmployeeService employeeService) {
+        this.requestService = requestService;
+        this.employeeService = employeeService;
+        this.requests = Collections.emptyList();
+        setupFilters();
+        setupGrid();
+        add(requestGrid);
+        add(createSummaryLayout());
+        add(createActionButtons());
+        refreshRequestGrid(null, null);
+    }
+
+    private void setupFilters() {
+        categoryFilter = createCategoryFilter();
+        stateFilter = createStateFilter();
+        add(categoryFilter, stateFilter);
+    }
+
+    private ComboBox<TimeOffRequestType> createCategoryFilter() {
+        categoryFilter = new ComboBox<>("Category");
+        categoryFilter.setItems(TimeOffRequestType.values());
+        categoryFilter.setValue(TimeOffRequestType.values()[0]);
+        categoryFilter.addValueChangeListener(event -> refreshRequestGrid(event.getValue(), stateFilter.getValue()));
+        return categoryFilter;
+    }
+
+    private ComboBox<TimeOffRequest.Status> createStateFilter() {
+        stateFilter = new ComboBox<>("State");
+        stateFilter.setItems(TimeOffRequest.Status.values());
+        stateFilter.setValue(TimeOffRequest.Status.values()[0]);
+        stateFilter.addValueChangeListener(event -> refreshRequestGrid(categoryFilter.getValue(), event.getValue()));
+        return stateFilter;
+    }
+
+    private void setupGrid() {
+        requestGrid.setColumns(
+                "category",
+                "state",
+                "availableDays",
+                "expiration",
+                "startDate",
+                "endDate",
+                "daysToBeTake",
+                "daysBalance"
+        );
+    }
+
+    private VerticalLayout createSummaryLayout() {
+        int totalVacations = 15;
+        int totalTimeOff = 2;
+        int totalAvailableDays = totalVacations + totalTimeOff;
+        Span holidaysLabel = new Span("TOTAL HOLIDAYS: " + totalVacations);
+        Span timeOffLabel = new Span("TOTAL TIME OFF: " + totalTimeOff);
+        Span availableDaysLabel = new Span("TOTAL AVAILABLE DAYS: " + totalAvailableDays);
+        return new VerticalLayout(holidaysLabel, timeOffLabel, availableDaysLabel);
+    }
+
+    private HorizontalLayout createActionButtons() {
+        Button viewButton = new Button("View");
+        Button editButton = new Button("Edit");
+        Button saveButton = new Button("Save");
+        Button closeButton = new Button("Close", event -> navigateToRequestsListView());
+        return new HorizontalLayout(viewButton, editButton, saveButton, closeButton);
+    }
+
+    private void navigateToRequestsListView() {
+        getUI().ifPresent(ui -> ui.navigate(RequestsListView.class));
+
+    }
+
+    private void refreshRequestGrid(final TimeOffRequestType category,
+                                    final TimeOffRequest.Status state) {
+        requestGrid.setPagingDataProvider((page, pageSize) -> {
+            if (allFiltersAreNull(category, state)) {
+                return fetchTimeOffRequests((int) page, pageSize);
+            } else {
+                return fetchFilteredTimeOffRequests((int) page, pageSize,category, state);
+            }
+        });
+        requestGrid.getDataProvider().refreshAll();
+    }
+
+    private boolean allFiltersAreNull(TimeOffRequestType category, TimeOffRequest.Status state) {
+        return category == null && state == null;
+    }
+
+    private List<TimeOffRequest> fetchTimeOffRequests(int page, int pageSize) {
+        int start = page * pageSize;
+        if (requestGrid.getSortOrder().isEmpty()) {
+            int end = Math.min(start + pageSize, requests.size());
+            return requests.subList(start, end);
+        } else {
+            return fetchSortedTimeOffRequests(start, pageSize);
+        }
+    }
+
+    private List<TimeOffRequest> fetchSortedTimeOffRequests(int start, int pageSize) {
+        GridSortOrder<TimeOffRequest> sortOrder = requestGrid.getSortOrder().getFirst();
+        int end = Math.min(start + pageSize, requests.size());
+        requests.sort(new BeanComparator<>(sortOrder.getSorted().getKey()));
+
+        if (sortOrder.getDirection() != SortDirection.ASCENDING) {
+            Collections.reverse(requests);
+        }
+        return requests.subList(start, end);
+    }
+
+    private List<TimeOffRequest> fetchFilteredTimeOffRequests(int page, int pageSize, TimeOffRequestType category, TimeOffRequest.Status state) {
+        requests = requestService.findRequestsByEmployeeId(employeeId);
+        if (category != null && !"ALL".equals(category.name())) {
+            requests = requests.stream()
+                    .filter(req -> req.getCategory().equals(category))
+                    .collect(Collectors.toList());
+        }
+        if (state != null && !"ALL".equals(state.name())) {
+            requests = requests.stream()
+                    .filter(req -> req.getState().equals(state))
+                    .collect(Collectors.toList());
+        }
+        int end = Math.min(page + pageSize, requests.size());
+        return requests.subList(page, end);
+    }
+
+    @Override
+    public void setParameter(BeforeEvent event, String parameter) {
+        try {
+            employeeId = UUID.fromString(parameter);
+            Employee employee = employeeService.getEmployee(employeeId);
+
+            String employeeName = employee.getFirstName() + " " + employee.getLastName();
+            String employeeTeam = employee.getTeam();
+            setViewTitle(employeeName, employeeTeam);
+
+            requests = requestService.findRequestsByEmployeeId(employeeId);
+            requestGrid.setItems(requests);
+        } catch (IllegalArgumentException e) {
+            requestGrid.setItems();
+        }
+    }
+
+    private void setViewTitle(String employeeName, String employeeTeam) {
+        H3 employeeTitle = new H3("Name: " + employeeName);
+        H3 teamTitle = new H3("Team: " + employeeTeam);
+        addComponentAsFirst(employeeTitle);
+        addComponentAtIndex(1, teamTitle);
+    }
+}

src/main/java/com/primefactorsolutions/views/RequestsListView.java

@@ -9,6 +9,7 @@ import com.vaadin.flow.component.combobox.ComboBox;
 import com.vaadin.flow.component.grid.GridSortOrder;
 import com.vaadin.flow.component.html.Main;
 import com.vaadin.flow.component.html.Span;
+import com.vaadin.flow.component.notification.Notification;
 import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
 import com.vaadin.flow.data.provider.SortDirection;
 import com.vaadin.flow.router.PageTitle;
@@ -19,6 +20,7 @@ import org.springframework.context.annotation.Scope;
 import org.vaadin.firitin.components.grid.PagingGrid;
 
 import java.util.List;
+import java.util.UUID;
 
 @SpringComponent
 @Scope("prototype")
@@ -35,6 +37,7 @@ public class RequestsListView extends Main {
     private ComboBox<Team> teamFilter;
     private ComboBox<TimeOffRequestType> categoryFilter;
     private ComboBox<TimeOffRequest.Status> stateFilter;
+    private UUID selectedEmployeeId;
 
     public RequestsListView(final TimeOffRequestService requestService,
                             final EmployeeService employeeService,
@@ -76,13 +79,25 @@ public class RequestsListView extends Main {
         requestGrid.addComponentColumn(this::createTeamSpan).setHeader("Team");
         requestGrid.setPaginationBarMode(PagingGrid.PaginationBarMode.BOTTOM);
         requestGrid.setPageSize(5);
+        requestGrid.asSingleSelect().addValueChangeListener(event -> {
+            TimeOffRequest selectedRequest = event.getValue();
+            if (selectedRequest != null) {
+                selectedEmployeeId = selectedRequest.getEmployee().getId();
+            }
+        });
     }
 
     private HorizontalLayout createActionButtons() {
-        Button viewButton = new Button("View");
+        Button viewButton = new Button("View", event -> {
+            if (selectedEmployeeId != null) {
+                navigateToTimeOffRequestView(selectedEmployeeId);
+            } else {
+                Notification.show("Please select a request to view.", 3000, Notification.Position.MIDDLE);
+            }
+        });
         Button editButton = new Button("Edit");
         Button saveButton = new Button("Save");
-        Button closeButton = new Button("Close", event -> closeView());
+        Button closeButton = new Button("Close", event -> navigateToMainView());
         return new HorizontalLayout(viewButton, editButton, saveButton, closeButton);
     }
 
@@ -230,7 +245,11 @@ public class RequestsListView extends Main {
         return "ALL".equals(team.getName()) ? "ALL" : team.getName();
     }
 
-    private void closeView() {
+    private void navigateToMainView() {
         getUI().ifPresent(ui -> ui.navigate(MainView.class));
     }
+
+    private void navigateToTimeOffRequestView(final UUID id_employee) {
+        getUI().ifPresent(ui -> ui.navigate("requests/" + id_employee.toString()));
+    }
 }