backend/src/main/java/core/api/controller/TaskgroupController.java

@@ -0,0 +1,36 @@
+package core.api.controller;
+
+import core.api.models.auth.SimpleStatusResponse;
+import core.api.models.timemanager.taskgroup.TaskgroupEntityInfo;
+import core.api.models.timemanager.taskgroup.TaskgroupFieldInfo;
+import core.entities.timemanager.Taskgroup;
+import core.services.ServiceExitCode;
+import core.services.ServiceResult;
+import core.services.TaskgroupService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+
+@CrossOrigin(origins = "*", maxAge = 3600)
+@RestController
+@RequestMapping("/api/settings")
+public class TaskgroupController {
+
+    private final TaskgroupService taskgroupService;
+
+    public TaskgroupController(@Autowired TaskgroupService taskgroupService) {
+        this.taskgroupService = taskgroupService;
+    }
+
+    @PutMapping("/taskgroups")
+    public ResponseEntity<?> createTaskgroup(@Valid @RequestBody TaskgroupFieldInfo fieldInfo) {
+        ServiceResult<Taskgroup> creationResult = taskgroupService.addTaskgroup(fieldInfo);
+        if(creationResult.getExitCode() == ServiceExitCode.OK) {
+            return ResponseEntity.ok(new TaskgroupEntityInfo(creationResult.getResult()));
+        } else {
+            return ResponseEntity.status(409).body(new SimpleStatusResponse("failed"));
+        }
+    }
+}

backend/src/main/java/core/api/models/timemanager/taskgroup/TaskgroupEntityInfo.java

@@ -0,0 +1,30 @@
+package core.api.models.timemanager.taskgroup;
+
+import core.entities.timemanager.Taskgroup;
+
+public class TaskgroupEntityInfo {
+
+    private long taskgroupID;
+    private String taskgroupName;
+
+    public TaskgroupEntityInfo(Taskgroup taskgroup) {
+        this.taskgroupID = taskgroup.getTaskgroupID();
+        this.taskgroupName = taskgroup.getTaskgroupName();
+    }
+
+    public long getTaskgroupID() {
+        return taskgroupID;
+    }
+
+    public void setTaskgroupID(long taskgroupID) {
+        this.taskgroupID = taskgroupID;
+    }
+
+    public String getTaskgroupName() {
+        return taskgroupName;
+    }
+
+    public void setTaskgroupName(String taskgroupName) {
+        this.taskgroupName = taskgroupName;
+    }
+}

backend/src/main/java/core/api/models/timemanager/taskgroup/TaskgroupFieldInfo.java

@@ -0,0 +1,23 @@
+package core.api.models.timemanager.taskgroup;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import org.hibernate.validator.constraints.Length;
+
+import javax.validation.constraints.Max;
+import javax.validation.constraints.NotBlank;
+
+public class TaskgroupFieldInfo {
+
+    @JsonProperty
+    @NotBlank
+    @Length(max = 255)
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

backend/src/main/java/core/entities/timemanager/Taskgroup.java

@@ -37,4 +37,6 @@ public class Taskgroup {
     public void setTaskgroupName(String taskgroupName) {
         this.taskgroupName = taskgroupName;
     }
+
+
 }

backend/src/main/java/core/repositories/timemanager/TaskgroupRepository.java

@@ -6,4 +6,6 @@ import org.springframework.stereotype.Repository;
 
 @Repository
 public interface TaskgroupRepository extends CrudRepository<Taskgroup, Long> {
+
+    boolean existsByTaskgroupName(String name);
 }

backend/src/main/java/core/services/ServiceExitCode.java

@@ -0,0 +1,8 @@
+package core.services;
+
+public enum ServiceExitCode {
+
+    OK,
+    ENTITY_ALREADY_EXIST,
+    MISSING_ENTITY;
+}

backend/src/main/java/core/services/ServiceResult.java

@@ -0,0 +1,37 @@
+package core.services;
+
+public class ServiceResult <T> {
+
+    private ServiceExitCode exitCode;
+    private T result;
+
+    public ServiceResult(ServiceExitCode exitCode, T result) {
+        this.exitCode = exitCode;
+        this.result = result;
+    }
+
+    public ServiceResult(T result) {
+        this.result = result;
+        this.exitCode = ServiceExitCode.OK;
+    }
+
+    public ServiceResult(ServiceExitCode exitCode) {
+        this.exitCode = exitCode;
+    }
+
+    public ServiceExitCode getExitCode() {
+        return exitCode;
+    }
+
+    public void setExitCode(ServiceExitCode exitCode) {
+        this.exitCode = exitCode;
+    }
+
+    public T getResult() {
+        return result;
+    }
+
+    public void setResult(T result) {
+        this.result = result;
+    }
+}

backend/src/main/java/core/services/TaskgroupService.java

@@ -1,15 +1,28 @@
 package core.services;
 
+import core.api.models.timemanager.taskgroup.TaskgroupEntityInfo;
+import core.api.models.timemanager.taskgroup.TaskgroupFieldInfo;
+import core.entities.timemanager.Taskgroup;
 import core.repositories.timemanager.TaskgroupRepository;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.scheduling.config.Task;
 import org.springframework.stereotype.Service;
 
 @Service
 public class TaskgroupService {
 
     private final TaskgroupRepository taskgroupRepository;
-
     public TaskgroupService(@Autowired  TaskgroupRepository taskgroupRepository) {
         this.taskgroupRepository = taskgroupRepository;
     }
+
+    public ServiceResult<Taskgroup> addTaskgroup(TaskgroupFieldInfo taskData) {
+        if(!taskgroupRepository.existsByTaskgroupName(taskData.getName())) {
+            Taskgroup taskgroup = new Taskgroup(taskData.getName());
+            taskgroupRepository.save(taskgroup);
+            return new ServiceResult<>(taskgroup);
+        } else {
+            return new ServiceResult<>(ServiceExitCode.ENTITY_ALREADY_EXIST);
+        }
+    }
 }