Implemented search users

api/src/main/java/ru/dragonestia/picker/api/repository/UserRepository.java

@@ -24,4 +24,6 @@ public interface UserRepository {
     }
 
     List<RUser> all(RRoom room, Set<UserDetails> details) throws NodeNotFoundException, RoomNotFoundException;
+
+    List<RUser> search(String input, Set<UserDetails> details);
 }

api/src/main/java/ru/dragonestia/picker/api/repository/response/SearchUserResponse.java

@@ -0,0 +1,7 @@
+package ru.dragonestia.picker.api.repository.response;
+
+import ru.dragonestia.picker.api.repository.response.type.RUser;
+
+import java.util.List;
+
+public record SearchUserResponse(List<RUser> users) {}

app/src/main/java/ru/dragonestia/picker/controller/UserController.java

@@ -0,0 +1,41 @@
+package ru.dragonestia.picker.controller;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import ru.dragonestia.picker.api.repository.details.UserDetails;
+import ru.dragonestia.picker.api.repository.response.SearchUserResponse;
+import ru.dragonestia.picker.service.UserService;
+import ru.dragonestia.picker.util.NamingValidator;
+
+import java.util.HashSet;
+import java.util.List;
+
+@RequiredArgsConstructor
+@RestController
+@RequestMapping("/users")
+public class UserController {
+
+    private final UserService userService;
+    private final NamingValidator namingValidator;
+
+    @GetMapping("/search")
+    SearchUserResponse search(@RequestParam(name = "input") String input,
+                              @RequestParam(name = "requiredDetails", required = false, defaultValue = "") String detailsSeq) {
+
+        if (!namingValidator.validateUserId(input) || input.isEmpty()) {
+            return new SearchUserResponse(List.of());
+        }
+
+        var details = new HashSet<UserDetails>();
+        for (var detailStr: detailsSeq.split(",")) {
+            try {
+                details.add(UserDetails.valueOf(detailStr.toUpperCase()));
+            } catch (IllegalArgumentException ignore) {}
+        }
+
+        return new SearchUserResponse(userService.searchUsers(input, details));
+    }
+}

app/src/main/java/ru/dragonestia/picker/repository/UserRepository.java

@@ -1,6 +1,7 @@
 package ru.dragonestia.picker.repository;
 
 import ru.dragonestia.picker.api.exception.RoomAreFullException;
+import ru.dragonestia.picker.api.repository.response.type.RUser;
 import ru.dragonestia.picker.model.Room;
 import ru.dragonestia.picker.model.User;
 
@@ -19,4 +20,6 @@ public interface UserRepository {
     void onRemoveRoom(Room room);
 
     List<User> usersOf(Room room);
+
+    List<User> search(String input);
 }

app/src/main/java/ru/dragonestia/picker/repository/impl/UserRepositoryImpl.java

@@ -120,6 +120,16 @@ public class UserRepositoryImpl implements UserRepository {
         }
     }
 
+    @Override
+    public List<User> search(String input) {
+        synchronized (usersMap) {
+            return usersMap.keySet().stream()
+                    .filter(user -> user.id().startsWith(input))
+                    .sorted(Comparator.comparing(User::id))
+                    .toList();
+        }
+    }
+
     private record NodeRoomPath(String node, String bucket) {
 
         @Override

app/src/main/java/ru/dragonestia/picker/service/UserService.java

@@ -21,4 +21,6 @@ public interface UserService {
     List<User> getRoomUsers(Room room);
 
     List<RUser> getRoomUsersWithDetailsResponse(Room room, Set<UserDetails> details);
+
+    List<RUser> searchUsers(String input, Set<UserDetails> details);
 }

app/src/main/java/ru/dragonestia/picker/service/impl/UserServiceImpl.java

@@ -56,4 +56,20 @@ public class UserServiceImpl implements UserService {
         }
         return users;
     }
+
+    @Override
+    public List<RUser> searchUsers(String input, Set<UserDetails> details) {
+        return userRepository.search(input).stream()
+                .map(user -> {
+                    var responseUser = user.toResponseObject();
+
+                    for (var detail: details) {
+                        if (detail == UserDetails.COUNT_ROOMS) {
+                            responseUser.putDetail(UserDetails.COUNT_ROOMS, Integer.toString(getUserRooms(user).size()));
+                        }
+                    }
+
+                    return responseUser;
+                }).toList();
+    }
 }

app/src/main/java/ru/dragonestia/picker/util/NamingValidator.java

@@ -25,7 +25,7 @@ public class NamingValidator {
         throw new InvalidRoomIdentifierException(nodeId, input);
     }
 
-    private boolean validateUserId(String input) {
+    public boolean validateUserId(String input) {
         return ValidateIdentifier.forUser(input);
     }
 

control-panel/src/main/java/ru/dragonestia/picker/cp/page/MainLayout.java

@@ -30,7 +30,7 @@ public class MainLayout extends AppLayout {
     private SideNav createSideNav() {
         var nav = new SideNav();
         nav.addItem(new SideNavItem("Nodes list", NodesPage.class, VaadinIcon.FOLDER_O.create()));
-        nav.addItem(new SideNavItem("Search users", HomePage.class, VaadinIcon.SEARCH.create()));
+        nav.addItem(new SideNavItem("Search users", UserSearchPage.class, VaadinIcon.SEARCH.create()));
         nav.addItem(new SideNavItem("Documentation", "https://github.com/ScarletRedMan/RoomPicker", VaadinIcon.BOOK.create()));
         nav.addItem(new SideNavItem("Sign-out", HomePage.class, VaadinIcon.SIGN_OUT.create()));
         return nav;

control-panel/src/main/java/ru/dragonestia/picker/cp/page/UserSearchPage.java

@@ -0,0 +1,73 @@
+package ru.dragonestia.picker.cp.page;
+
+import com.vaadin.flow.component.Unit;
+import com.vaadin.flow.component.button.Button;
+import com.vaadin.flow.component.button.ButtonVariant;
+import com.vaadin.flow.component.grid.ColumnTextAlign;
+import com.vaadin.flow.component.grid.Grid;
+import com.vaadin.flow.component.html.Span;
+import com.vaadin.flow.component.icon.Icon;
+import com.vaadin.flow.component.icon.VaadinIcon;
+import com.vaadin.flow.component.orderedlayout.VerticalLayout;
+import com.vaadin.flow.component.textfield.TextField;
+import com.vaadin.flow.router.PageTitle;
+import com.vaadin.flow.router.Route;
+import org.springframework.beans.factory.annotation.Autowired;
+import ru.dragonestia.picker.api.repository.UserRepository;
+import ru.dragonestia.picker.api.repository.details.UserDetails;
+import ru.dragonestia.picker.api.repository.response.type.RUser;
+import ru.dragonestia.picker.cp.component.Notifications;
+
+import java.util.LinkedList;
+import java.util.List;
+
+@PageTitle("Search users")
+@Route(value = "/users", layout = MainLayout.class)
+public class UserSearchPage extends VerticalLayout {
+
+    private final UserRepository userRepository;
+    private final TextField fieldUsername;
+    private final Grid<RUser> userGrid;
+    private List<RUser> cachedUsers = new LinkedList<>();
+
+    @Autowired
+    public UserSearchPage(UserRepository userRepository) {
+        this.userRepository = userRepository;
+
+        add(fieldUsername = createUsernameInputField());
+        add(userGrid = createUserGrid());
+    }
+
+    private TextField createUsernameInputField() {
+        var field = new TextField();
+        field.setLabel("Username");
+        field.setPlaceholder("some-user-identifier");
+        field.setRequired(true);
+        field.setMinWidth(30, Unit.PERCENTAGE);
+
+        var button = new Button(new Icon(VaadinIcon.SEARCH));
+        button.addThemeVariants(ButtonVariant.LUMO_PRIMARY);
+        button.getStyle().set("color", "#FFFFFF");
+        button.addClickListener(event -> search(fieldUsername.getValue().trim()));
+
+        field.setSuffixComponent(button);
+        return field;
+    }
+
+    private Grid<RUser> createUserGrid() {
+        var grid = new Grid<RUser>();
+
+        grid.addColumn(RUser::getId).setHeader("Identifier")
+                .setFooter("Found %s users".formatted(cachedUsers.size()));
+
+        grid.addColumn(user -> user.getDetail(UserDetails.COUNT_ROOMS)).setTextAlign(ColumnTextAlign.CENTER).setHeader("Linked with rooms");
+
+        grid.addComponentColumn(user -> new Span("buttons")).setHeader("Manage"); // TODO
+
+        return grid;
+    }
+
+    private void search(String input) {
+        userGrid.setItems(cachedUsers = userRepository.search(input, UserRepository.ALL_DETAILS));
+    }
+}

control-panel/src/main/java/ru/dragonestia/picker/cp/repository/impl/UserRepositoryImpl.java

@@ -7,6 +7,7 @@ import org.springframework.http.HttpMethod;
 import ru.dragonestia.picker.api.exception.NodeNotFoundException;
 import ru.dragonestia.picker.api.exception.RoomAreFullException;
 import ru.dragonestia.picker.api.exception.RoomNotFoundException;
+import ru.dragonestia.picker.api.repository.response.SearchUserResponse;
 import ru.dragonestia.picker.api.repository.response.type.RRoom;
 import ru.dragonestia.picker.api.repository.response.type.RUser;
 import ru.dragonestia.picker.api.repository.UserRepository;
@@ -54,4 +55,17 @@ public class UserRepositoryImpl implements UserRepository {
                     params.put("requiredDetails", detailsStr);
                 }).users();
     }
+
+    @Override
+    public List<RUser> search(String input, Set<UserDetails> details) {
+        return rest.query("/users/search",
+                HttpMethod.GET,
+                SearchUserResponse.class,
+                params -> {
+                    var detailsStr = String.join(",", details.stream().map(Enum::toString).toList());
+
+                    params.put("requiredDetails", detailsStr);
+                    params.put("input", input);
+                }).users();
+    }
 }