Merge branch '23-backend-put-project-parameter-liste-statt-project-object' into 'main'

Resolve "Backend: put("/project") Parameter-Liste statt Project Object"

Closes #23

See merge request !18

Backend/backend.py

 from fastapi import FastAPI, HTTPException
 from pydantic import BaseModel, field_validator
 from typing import List, Optional
-import os,json,re
+import os, json, re
 from datetime import datetime
 
 app = FastAPI()
@@ -58,9 +58,11 @@ def load_projects():
     with open(json_file_path, "r") as file:
         return json.load(file)
 
+
 def id_exists(id: int) -> bool:
     return any(project["id"] == id for project in projects)
 
+
 # Projekte in die JSON-Datei speichern
 def save_projects_to_json():
     with open(json_file_path, "w") as file:
@@ -119,28 +121,55 @@ async def delete_project(id: int):
         Error.NOT_FOUND.status_code:{"description":Error.NOT_FOUND.detail},
         Error.ID_EXISTS.status_code:{"description":Error.ID_EXISTS.detail}
     })
-async def update_project(id: int, updated_project: Project):
+async def update_project(
+    id: int,
+    cost: float,
+    KPI1: float,
+    KPI2: float,
+    KPI3: float,
+    KPI4: float,
+    KPI5: int,
+    KPI6: float,
+    KPI7: int,
+    KPI8: int,
+    start_date: str,
+    duration: int,
+):
     global projects
+
     project_index = next(
         (index for index, proj in enumerate(projects) if proj["id"] == id), None
     )
 
     if project_index is None:
         raise Error.NOT_FOUND
-    
-
-    # Prüfen,  ob die neue ID zu einem anderen Projekt gehört
-    if updated_project.id is not None and updated_project.id != id and id_exists(updated_project.id):
-        raise Error.ID_EXISTS
 
-    updated_project_dict = updated_project.model_dump()
-    updated_project_dict.pop("id", None)
+    if id is not None and id_exists(id):
+        raise HTTPException(
+            status_code=409,
+            detail="Ein anderes Projekt mit dieser ID existiert bereits.",
+        )
+
+    updated_project = Project(
+        id=id,
+        cost=cost,
+        KPI1=KPI1,
+        KPI2=KPI2,
+        KPI3=KPI3,
+        KPI4=KPI4,
+        KPI5=KPI5,
+        KPI6=KPI6,
+        KPI7=KPI7,
+        KPI8=KPI8,
+        start_date=start_date,
+        duration=duration,
+    )
 
-    projects[project_index].update(updated_project_dict)
+    projects[project_index] = updated_project.model_dump()
 
     save_projects_to_json()
 
-    return projects[project_index]
+    return updated_project
 
 
 # PUT /project - Neues Projekt erstellen (ID wird automatisch vergeben)
@@ -153,7 +182,6 @@ async def update_project(id: int, updated_project: Project):
 async def create_project(new_project: Project):
     global projects
 
-
     # prüfen Prüfen, ob die angegebene ID bereits existiert
     if new_project.id is not None and id_exists(new_project.id):
         raise Error.ID_EXISTS
@@ -167,4 +195,3 @@ async def create_project(new_project: Project):
     save_projects_to_json()
 
     return new_project
-