@@ -169,5 +213,4 @@ paths:
               schema:
                 type: string
         500:
-          $ref: "#/components/responses/InternalError"

@@ -77,6 +86,12 @@ components:
         text/plain:
           schema:
             type: string
+    NotAcceptable:

@@ -150,0 +184,4 @@
+          $ref: "#/components/responses/Unauthorized"
+        404:
+          $ref: "#/components/responses/NotFound"
+        406:

@@ -96,0 +101,4 @@
+    public ResponseEntity<Void> addEmployee(Long id, AddEmployeeDTO body) {
+
+        Optional<Project> optionalProject = projectRepository.findById(id);
+        if (optionalProject.isEmpty()) {

@@ -96,0 +103,4 @@
+        Optional<Project> optionalProject = projectRepository.findById(id);
+        if (optionalProject.isEmpty()) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }

@@ -96,0 +115,4 @@
+            if (allocationRepository.hasOverlappingAllocation(employee.getId(), project.getStart(), project.getPlannedEnd())) {
+                return new ResponseEntity<>(HttpStatus.CONFLICT);
+            }
+            Allocation allocation = new Allocation();

@@ -96,0 +130,4 @@
+        }
+    }
+
+    private boolean hasQualification(List<QualificationGetDTO> qualifications, Long neededQualificationId) {

@@ -0,0 +7,4 @@
+
+public interface AllocationRepository extends CrudRepository<Allocation, AllocationId> {
+
+    @Query("SELECT COUNT(a) > 0 FROM Allocation a " +

@@ -96,0 +102,4 @@
+        Optional<Project> optionalProject = projectRepository.findById(id);
+
+        if (projectRepository.findById(id).isEmpty()) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);

@@ -96,0 +116,4 @@
+        }
+
+        boolean hasQualification = employee.getSkillSet()
+                .stream()

@@ -96,0 +128,4 @@
+
+        List<Allocation> allocations = allocationRepository.findAllocationsByEmployeeId(body.getEmployeeId());
+
+        boolean hasOverlap = allocations.stream()