PMT-4: Implement Endpoint

Co-authored-by: Ole Kück <ole.kueck@hmmh.de>

src/main/java/de/hmmh/pmt/ApiController.java

@@ -1,13 +1,13 @@
 package de.hmmh.pmt;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import de.hmmh.pmt.db.Allocation;
+import de.hmmh.pmt.db.AllocationRepository;
 import de.hmmh.pmt.db.Project;
 import de.hmmh.pmt.db.ProjectRepository;
-import de.hmmh.pmt.dtos.CreateProjectDTO;
+import de.hmmh.pmt.dtos.*;
-import de.hmmh.pmt.dtos.CreatedProjectDTO;
-import de.hmmh.pmt.dtos.GetAllProjectsDTO;
-import de.hmmh.pmt.dtos.ProjectInfo;
 import de.hmmh.pmt.employee.ApiClientFactory;
+import de.hmmh.pmt.employee.dtos.EmployeeResponseDTO;
 import de.hmmh.pmt.oas.DefaultApi;
 import de.hmmh.pmt.util.Mapper;
 import jakarta.servlet.http.HttpServletRequest;
@@ -19,6 +19,8 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestClientException;
 
+import java.time.ZoneOffset;
+import java.util.List;
 import java.util.Optional;
 
 @Controller
@@ -30,6 +32,8 @@ public class ApiController implements DefaultApi {
     private ApiClientFactory apiClientFactory;
     @Autowired
     private ProjectRepository projectRepository;
+    @Autowired
+    AllocationRepository allocationRepository;
 
     @Override
     public Optional<ObjectMapper> getObjectMapper() {
@@ -92,4 +96,51 @@ public class ApiController implements DefaultApi {
         CreatedProjectDTO response = mapper.map(project);
         return new ResponseEntity<>(response, HttpStatus.CREATED);
     }
+
+    @Override
+    public ResponseEntity<Void> addEmployee(Long id, AddEmployeeDTO body) {
+        Optional<Project> optionalProject = projectRepository.findById(id);
+        if (optionalProject.isEmpty()) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+        Project project = optionalProject.get();
+
+        EmployeeResponseDTO employee;
+        try {
+            employee = apiClientFactory.getEmployeeApi().findById(body.getEmployeeId());
+        } catch (HttpClientErrorException exception) {
+            return new ResponseEntity<>(exception.getStatusCode().equals(HttpStatus.NOT_FOUND)
+                    ? HttpStatus.NOT_FOUND
+                    : HttpStatus.SERVICE_UNAVAILABLE);
+        } catch (RestClientException exception) {
+            return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
+        }
+
+        if (employee.getSkillSet()
+                .stream()
+                .noneMatch(qualification -> qualification.getId().equals(body.getQualificationId()))) {
+            return new ResponseEntity<>(HttpStatus.UNPROCESSABLE_ENTITY);
+        }
+
+        long start = project.getStart().toEpochSecond(ZoneOffset.UTC);
+        long plannedEnd = project.getPlannedEnd().toEpochSecond(ZoneOffset.UTC);
+        List<Allocation> allocations = allocationRepository.findAllocationsByEmployeeId(body.getEmployeeId());
+        if (allocations.stream()
+                .map(Allocation::getProject)
+                .anyMatch(allocatedProject -> {
+                    long allocatedStart = allocatedProject.getStart().toEpochSecond(null);
+                    long allocatedPlannedEnd = allocatedProject.getPlannedEnd().toEpochSecond(null);
+                    return Math.max(start, allocatedStart) <= Math.min(plannedEnd, allocatedPlannedEnd);
+                })) {
+            return new ResponseEntity<>(HttpStatus.UNPROCESSABLE_ENTITY);
+        }
+
+        Allocation allocation = new Allocation();
+        allocation.setEmployeeId(employee.getId());
+        allocation.setRole(body.getQualificationId());
+        allocation.setProject(project);
+        allocationRepository.save(allocation);
+
+        return new ResponseEntity<>(HttpStatus.NO_CONTENT);
+    }
 }