Creates error dto, global routing handler, all handler and one routng class (empty) and implements user handler

src/main/java/net/szymonsawicki/reactivetimesheetapp/application/service/TimeEntryService.java

@@ -42,7 +42,8 @@ public class TimeEntryService {
     private void checkTime(CreateTimeEntryDto timeEntryToCheck) {
         timeEntryRepository.findAllByUserAndDate(timeEntryToCheck.user().toUser(), timeEntryToCheck.date())
                 .filter(timeEntry ->
-                        TimeEntryUtils.toTimeFrom.apply(timeEntry).isAfter(timeEntryToCheck.timeTo()) || TimeEntryUtils.toTimeTo.apply(timeEntry).isBefore(timeEntryToCheck.timeFrom()))
+                        TimeEntryUtils.toTimeFrom.apply(timeEntry).isAfter(timeEntryToCheck.timeTo()) ||
+                                TimeEntryUtils.toTimeTo.apply(timeEntry).isBefore(timeEntryToCheck.timeFrom()))
                 .switchIfEmpty(Mono.error(new TimeEntryServiceException("entry time conflict")));
     }
 }

src/main/java/net/szymonsawicki/reactivetimesheetapp/application/service/UserService.java

@@ -51,6 +51,9 @@ public class UserService {
         return userRepository
                 .findById(userId)
                 .flatMap(user -> {
+
+                    // when teamId is not null then list of members in related team will be updated
+
                     String teamId = UserUtils.toTeamId.apply(user);
                     if (teamId != null) {
                         teamRepository

src/main/java/net/szymonsawicki/reactivetimesheetapp/infrastructure/persistence/dao/TeamDao.java

@@ -1,6 +1,5 @@
 package net.szymonsawicki.reactivetimesheetapp.infrastructure.persistence.dao;
 
-import net.szymonsawicki.reactivetimesheetapp.domain.team.Team;
 import net.szymonsawicki.reactivetimesheetapp.infrastructure.persistence.entity.TeamEntity;
 import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
 import reactor.core.publisher.Mono;

src/main/java/net/szymonsawicki/reactivetimesheetapp/web/Routing.java

@@ -0,0 +1,4 @@
+package net.szymonsawicki.reactivetimesheetapp.web;
+
+public class Routing {
+}

src/main/java/net/szymonsawicki/reactivetimesheetapp/web/config/GlobalRoutingHandler.java

@@ -0,0 +1,27 @@
+package net.szymonsawicki.reactivetimesheetapp.web.config;
+
+import net.szymonsawicki.reactivetimesheetapp.web.error.ErrorDto;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.BodyInserters;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import reactor.core.publisher.Mono;
+
+public interface GlobalRoutingHandler {
+
+    // Helper method for generic request processing and error handling
+
+    static <T> Mono<ServerResponse> doRequest(Mono<T> action, HttpStatus httpStatus) {
+        return action
+                .flatMap(result -> ServerResponse
+                        .status(httpStatus)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .body(BodyInserters.fromValue(result))
+                )
+                .onErrorResume(error -> ServerResponse
+                        .status(HttpStatus.INTERNAL_SERVER_ERROR)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .body(BodyInserters.fromValue(new ErrorDto(error.getMessage())))
+                );
+    }
+}

src/main/java/net/szymonsawicki/reactivetimesheetapp/web/error/ErrorDto.java

@@ -0,0 +1,4 @@
+package net.szymonsawicki.reactivetimesheetapp.web.error;
+
+public record ErrorDto(String message) {
+}

src/main/java/net/szymonsawicki/reactivetimesheetapp/web/handler/TeamHandler.java

@@ -0,0 +1,11 @@
+package net.szymonsawicki.reactivetimesheetapp.web.handler;
+
+import lombok.RequiredArgsConstructor;
+import net.szymonsawicki.reactivetimesheetapp.application.service.TeamService;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class TeamHandler {
+    private final TeamService teamService;
+}

src/main/java/net/szymonsawicki/reactivetimesheetapp/web/handler/TimeEntryHandler.java

@@ -0,0 +1,12 @@
+package net.szymonsawicki.reactivetimesheetapp.web.handler;
+
+
+import lombok.RequiredArgsConstructor;
+import net.szymonsawicki.reactivetimesheetapp.application.service.TimeEntryService;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class TimeEntryHandler {
+    private final TimeEntryService timeEntryService;
+}

src/main/java/net/szymonsawicki/reactivetimesheetapp/web/handler/UserHandler.java

@@ -0,0 +1,38 @@
+package net.szymonsawicki.reactivetimesheetapp.web.handler;
+
+
+import lombok.RequiredArgsConstructor;
+import net.szymonsawicki.reactivetimesheetapp.application.service.UserService;
+import net.szymonsawicki.reactivetimesheetapp.domain.user.dto.CreateUserDto;
+import net.szymonsawicki.reactivetimesheetapp.web.config.GlobalRoutingHandler;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+import org.springframework.web.reactive.function.server.ServerRequest;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import reactor.core.publisher.Mono;
+
+@Component
+@RequiredArgsConstructor
+public class UserHandler {
+    private final UserService userService;
+
+    public Mono<ServerResponse> findById(ServerRequest serverRequest) {
+        var userId = serverRequest.pathVariable("userId");
+        return GlobalRoutingHandler.doRequest(userService.findById(userId), HttpStatus.OK);
+    }
+
+    public Mono<ServerResponse> findByUsername(ServerRequest serverRequest) {
+        var username = serverRequest.pathVariable("username");
+        return GlobalRoutingHandler.doRequest(userService.findById(username), HttpStatus.OK);
+    }
+
+    public Mono<ServerResponse> createUser(ServerRequest serverRequest) {
+        var createUsertDtoMono = serverRequest.bodyToMono(CreateUserDto.class);
+        return GlobalRoutingHandler.doRequest(userService.addUser(createUsertDtoMono), HttpStatus.CREATED);
+    }
+
+    public Mono<ServerResponse> deleteUser(ServerRequest serverRequest) {
+        var userId = serverRequest.pathVariable("userId");
+        return GlobalRoutingHandler.doRequest(userService.deleteUser(userId), HttpStatus.OK);
+    }
+}