nothing is fucking working fuck everything

src/main/java/com/application/munera/services/CategoryService.java

@@ -6,6 +6,7 @@ import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 
+import java.util.Collection;
 import java.util.List;
 import java.util.Optional;
 
@@ -37,4 +38,8 @@ public class CategoryService {
     public Page<Category> list(Pageable pageable){
         return categoryRepository.findAll(pageable);
     }
+
+    public Collection<String> findNames() {
+        return categoryRepository.findAll().stream().map(Category::getName).toList();
+    }
 }

src/main/java/com/application/munera/services/PersonService.java

@@ -10,6 +10,7 @@ import org.springframework.stereotype.Service;
 
 import java.math.BigDecimal;
 import java.util.Collection;
+import java.util.List;
 import java.util.Optional;
 
 @Service
@@ -30,7 +31,11 @@ public class PersonService {
     public Collection<Person> findAll() {
         return this.personRepository.findAll();
     }
-
+    
+    public List<Person> findAllAsList() {
+        return this.personRepository.findAll();
+    }
+    
     public void update(Person person) {
         this.personRepository.save(person);
     }
@@ -64,4 +69,8 @@ public class PersonService {
         final var debit = this.expenseService.findUnpaidDebtByUser(person).stream().map(Expense::getCost).reduce(BigDecimal.ZERO, BigDecimal::add);
         return credit.subtract(debit);
     }
+
+    public List<String> findNames() {
+        return personRepository.findAll().stream().map(Person::getFirstName).toList();
+    }
 }

src/main/java/com/application/munera/views/expenses/ExpensesView.java

@@ -49,7 +49,7 @@ public class ExpensesView extends Div implements BeforeEnterObserver {
     private static final String EXPENSE_ID = "expenseID";
     private static final String EXPENSE_EDIT_ROUTE_TEMPLATE = "/%s/edit";
 
-    private final Grid<Expense> grid = new Grid<>(Expense.class, false);
+    private Grid<Expense> grid;
 
     private final Button cancel = new Button("Cancel");
     private final Button save = new Button("Save");
@@ -74,6 +74,7 @@ public class ExpensesView extends Div implements BeforeEnterObserver {
     private MultiSelectComboBox<Person> creditors;
     private MultiSelectComboBox<Person> debtors;
     private ComboBox<Event> event;
+
     public ExpensesView(ExpenseService expenseService, CategoryService categoryService, PersonService personService, EventService eventService) {
         this.expenseService = expenseService;
         this.categoryService = categoryService;
@@ -81,41 +82,18 @@ public class ExpensesView extends Div implements BeforeEnterObserver {
         this.eventService = eventService;
         addClassNames("expenses-view");
 
+        final var categoriesNames = this.categoryService.findAll();
+        final var creditorsNames = this.personService.findAllAsList();
+        Filters filters = new Filters(this::refreshGrid, categoriesNames, creditorsNames);
+
         // Create UI
         SplitLayout splitLayout = new SplitLayout();
 
-        createGridLayout(splitLayout);
+        createGridLayout(splitLayout, filters);
         createEditorLayout(splitLayout);
 
         add(splitLayout);
 
-        // Configure Grid
-        grid.addColumn(Expense::getName).setHeader("Name").setSortable(true).setSortProperty("name");
-        grid.addColumn(Expense::getCost).setHeader("Amount").setSortable(true).setSortProperty("cost");
-        grid.addColumn(expenseCategory -> expenseCategory.getCategory().getName()).setHeader("Category").setSortable(true).setSortProperty("category");
-        grid.addColumn(Expense::getPeriodInterval).setHeader("Period Interval").setSortable(true);
-        grid.addColumn(Expense::getPeriodUnit).setHeader("Period Unit").setSortable(true);
-        grid.addColumn(Expense::getDate).setHeader("Date").setSortable(true).setSortProperty("date");
-        // grid.addColumn(expenseEvent -> expenseEvent.getEvent().getName()).setHeader("Event").setSortable(true);
-
-        grid.addColumn(new ComponentRenderer<>(expense1 -> createBadge(expenseService.isExpenseResolved(expense1)))).setHeader("Status").setSortable(true);
-        grid.getColumns().forEach(col -> col.setAutoWidth(true));
-
-        grid.setItems(query -> expenseService.list(
-                        PageRequest.of(query.getPage(), query.getPageSize(), VaadinSpringDataHelpers.toSpringDataSort(query)))
-                .stream());
-        grid.addThemeVariants(GridVariant.LUMO_NO_BORDER);
-
-        // when a row is selected or deselected, populate form
-        grid.asSingleSelect().addValueChangeListener(event -> {
-            if (event.getValue() != null) {
-                UI.getCurrent().navigate(String.format(EXPENSE_EDIT_ROUTE_TEMPLATE, event.getValue().getId()));
-            } else {
-                clearForm();
-                UI.getCurrent().navigate(ExpensesView.class);
-            }
-        });
-
         // Configure Form
         binder = new BeanValidationBinder<>(Expense.class);
 
@@ -270,11 +248,38 @@ public class ExpensesView extends Div implements BeforeEnterObserver {
         editorLayoutDiv.add(buttonLayout);
     }
 
-    private void createGridLayout(SplitLayout splitLayout) {
+    private void createGridLayout(SplitLayout splitLayout, Filters filters) {
+        grid = new Grid<>(Expense.class, false);
         Div wrapper = new Div();
         wrapper.setClassName("grid-wrapper");
         splitLayout.addToPrimary(wrapper);
-        wrapper.add(grid);
+        wrapper.add(filters, grid);
+
+        // Configure Grid
+        grid.addColumn(Expense::getName).setHeader("Name").setSortable(true).setSortProperty("name");
+        grid.addColumn(Expense::getCost).setHeader("Amount").setSortable(true).setSortProperty("cost");
+        grid.addColumn(expenseCategory -> expenseCategory.getCategory().getName()).setHeader("Category").setSortable(true).setSortProperty("category");
+        grid.addColumn(Expense::getPeriodInterval).setHeader("Period Interval").setSortable(true);
+        grid.addColumn(Expense::getPeriodUnit).setHeader("Period Unit").setSortable(true);
+        grid.addColumn(Expense::getDate).setHeader("Date").setSortable(true).setSortProperty("date");
+
+        grid.addColumn(new ComponentRenderer<>(expense1 -> createBadge(expenseService.isExpenseResolved(expense1)))).setHeader("Status").setSortable(true);
+        grid.getColumns().forEach(col -> col.setAutoWidth(true));
+
+        grid.setItems(query -> expenseService.list(
+                        PageRequest.of(query.getPage(), query.getPageSize(), VaadinSpringDataHelpers.toSpringDataSort(query)))
+                .stream());
+        grid.addThemeVariants(GridVariant.LUMO_NO_BORDER);
+
+        // when a row is selected or deselected, populate form
+        grid.asSingleSelect().addValueChangeListener(event -> {
+            if (event.getValue() != null) {
+                UI.getCurrent().navigate(String.format(EXPENSE_EDIT_ROUTE_TEMPLATE, event.getValue().getId()));
+            } else {
+                clearForm();
+                UI.getCurrent().navigate(ExpensesView.class);
+            }
+        });
     }
 
     private void refreshGrid() {

src/main/java/com/application/munera/views/expenses/Filters.java

@@ -0,0 +1,154 @@
+package com.application.munera.views.expenses;
+
+import com.application.munera.data.Category;
+import com.application.munera.data.Expense;
+import com.application.munera.data.Person;
+import com.vaadin.flow.component.Component;
+import com.vaadin.flow.component.Text;
+import com.vaadin.flow.component.button.Button;
+import com.vaadin.flow.component.button.ButtonVariant;
+import com.vaadin.flow.component.checkbox.CheckboxGroup;
+import com.vaadin.flow.component.combobox.ComboBox;
+import com.vaadin.flow.component.combobox.MultiSelectComboBox;
+import com.vaadin.flow.component.datepicker.DatePicker;
+import com.vaadin.flow.component.html.Div;
+import com.vaadin.flow.component.orderedlayout.FlexComponent;
+import com.vaadin.flow.component.orderedlayout.FlexLayout;
+import com.vaadin.flow.component.textfield.TextField;
+import com.vaadin.flow.theme.lumo.LumoUtility;
+import jakarta.persistence.criteria.*;
+import org.springframework.data.jpa.domain.Specification;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Filters extends Div implements Specification<Expense> {
+
+    private final TextField name = new TextField("Expense's name");
+    private final ComboBox<Category> category = new ComboBox<>("Category");
+    private final DatePicker startDate = new DatePicker("Date of Birth");
+    private final DatePicker endDate = new DatePicker();
+    private final MultiSelectComboBox<Person> creditors = new MultiSelectComboBox<>("Creditors");
+    private final CheckboxGroup<String> isResolved = new CheckboxGroup<>("Role");
+
+    public Filters(Runnable onSearch, List<Category> categoriesNames, List<Person> creditorsNames) {
+        setWidthFull();
+        addClassName("filter-layout");
+        addClassNames(LumoUtility.Padding.Horizontal.LARGE, LumoUtility.Padding.Vertical.MEDIUM,
+                LumoUtility.BoxSizing.BORDER);
+        name.setPlaceholder("Expense's name");
+        final var names = creditorsNames.stream().map(Person::getFirstName).toArray();
+        creditors.setItems((creditorsNames));
+
+        isResolved.setItems("Worker", "Supervisor", "Manager", "External");
+        isResolved.addClassName("double-width");
+
+        // Action buttons
+        Button resetBtn = new Button("Reset");
+        resetBtn.addThemeVariants(ButtonVariant.LUMO_TERTIARY);
+        resetBtn.addClickListener(e -> {
+            name.clear();
+            category.clear();
+            startDate.clear();
+            endDate.clear();
+            creditors.clear();
+            isResolved.clear();
+            onSearch.run();
+        });
+        Button searchBtn = new Button("Search");
+        searchBtn.addThemeVariants(ButtonVariant.LUMO_PRIMARY);
+        searchBtn.addClickListener(e -> onSearch.run());
+
+        Div actions = new Div(resetBtn, searchBtn);
+        actions.addClassName(LumoUtility.Gap.SMALL);
+        actions.addClassName("actions");
+
+        add(name, category, creditors, isResolved, actions);
+    }
+
+    private Component createDateRangeFilter() {
+        startDate.setPlaceholder("From");
+
+        endDate.setPlaceholder("To");
+
+        // For screen readers
+        startDate.setAriaLabel("From date");
+        endDate.setAriaLabel("To date");
+
+        FlexLayout dateRangeComponent = new FlexLayout(startDate, new Text(" – "), endDate);
+        dateRangeComponent.setAlignItems(FlexComponent.Alignment.BASELINE);
+        dateRangeComponent.addClassName(LumoUtility.Gap.XSMALL);
+
+        return dateRangeComponent;
+    }
+
+    @Override
+    public Predicate toPredicate(Root<Expense> root, CriteriaQuery<?> query, CriteriaBuilder criteriaBuilder) {
+        List<Predicate> predicates = new ArrayList<>();
+
+        if (!name.isEmpty()) {
+            String lowerCaseFilter = name.getValue().toLowerCase();
+            Predicate firstNameMatch = criteriaBuilder.like(criteriaBuilder.lower(root.get("name")),
+                    lowerCaseFilter + "%");
+            predicates.add(firstNameMatch);
+        }
+
+//        if (!category.isEmpty()) {
+//            String databaseColumn = "phone";
+//            String ignore = "- ()";
+//
+//            String lowerCaseFilter = ignoreCharacters(ignore, category.getValue().toLowerCase());
+//            Predicate phoneMatch = criteriaBuilder.like(
+//                    ignoreCharacters(ignore, criteriaBuilder, criteriaBuilder.lower(root.get(databaseColumn))),
+//                    "%" + lowerCaseFilter + "%");
+//            predicates.add(phoneMatch);
+//
+//        }
+        if (startDate.getValue() != null) {
+            String databaseColumn = "dateOfBirth";
+            predicates.add(criteriaBuilder.greaterThanOrEqualTo(root.get(databaseColumn),
+                    criteriaBuilder.literal(startDate.getValue())));
+        }
+        if (endDate.getValue() != null) {
+            String databaseColumn = "dateOfBirth";
+            predicates.add(criteriaBuilder.greaterThanOrEqualTo(criteriaBuilder.literal(endDate.getValue()),
+                    root.get(databaseColumn)));
+        }
+//        if (!creditors.isEmpty()) {
+//            String databaseColumn = "occupation";
+//            List<Predicate> occupationPredicates = new ArrayList<>();
+//            for (String occupation : creditors.getValue()) {
+//                occupationPredicates
+//                        .add(criteriaBuilder.equal(criteriaBuilder.literal(occupation), root.get(databaseColumn)));
+//            }
+//            predicates.add(criteriaBuilder.or(occupationPredicates.toArray(Predicate[]::new)));
+//        }
+        if (!isResolved.isEmpty()) {
+            String databaseColumn = "role";
+            List<Predicate> rolePredicates = new ArrayList<>();
+            for (String role : isResolved.getValue()) {
+                rolePredicates.add(criteriaBuilder.equal(criteriaBuilder.literal(role), root.get(databaseColumn)));
+            }
+            predicates.add(criteriaBuilder.or(rolePredicates.toArray(Predicate[]::new)));
+        }
+        return criteriaBuilder.and(predicates.toArray(Predicate[]::new));
+    }
+
+    private String ignoreCharacters(String characters, String in) {
+        String result = in;
+        for (int i = 0; i < characters.length(); i++) {
+            result = result.replace("" + characters.charAt(i), "");
+        }
+        return result;
+    }
+
+    private Expression<String> ignoreCharacters(String characters, CriteriaBuilder criteriaBuilder,
+                                                Expression<String> inExpression) {
+        Expression<String> expression = inExpression;
+        for (int i = 0; i < characters.length(); i++) {
+            expression = criteriaBuilder.function("replace", String.class, expression,
+                    criteriaBuilder.literal(characters.charAt(i)), criteriaBuilder.literal(""));
+        }
+        return expression;
+    }
+}

src/main/resources/application.properties

@@ -12,5 +12,5 @@ spring.jpa.hibernate.ddl-auto = update
 # To improve the performance during development.
 # For more information https://vaadin.com/docs/latest/integrations/spring/configuration#special-configuration-parameters
 vaadin.allowed-packages = com.vaadin,org.vaadin,dev.hilla,com.application.munera
-#spring.jpa.defer-datasource-initialization = true
+spring.jpa.defer-datasource-initialization = true
 spring.sql.init.mode = always