✨ Add a get route for pin shares

app/routes/pins.py

@@ -214,3 +214,33 @@ async def delete_pin(id: str, current_user: User = Depends(get_current_user)):
         
     except bson.errors.InvalidId:
         objectid_misformatted()
+
+@pins_router.get(
+    path="/{id}/shares",
+    responses={401: {"model": HTTPError}, 404: {"model": HTTPError}, 422: {"model": HTTPError}, 403: {"model": HTTPError}}
+)
+async def get_pin_shares(id: str, current_user: User = Depends(get_current_user)):
+    try:
+        # Vérifier si le pin existe et appartient à l'utilisateur courant
+        pin = pins_collection.find_one({"_id": ObjectId(id)})
+        check_pin_is_null(pin)
+        
+        if pin["user_id"] != current_user.uid:
+            raise HTTPException(status_code=403, detail="You can only view shares of your own pins")
+        
+        # Récupérer toutes les permissions de partage pour ce pin
+        shares = pin_permissions_collection.find({"pin_id": ObjectId(id)})
+        
+        # Transformer les résultats en liste de dictionnaires
+        shares_list = []
+        for share in shares:
+            shares_list.append({
+                "user_id": str(share["user_id"]),
+                "can_edit": share["can_edit"],
+                "can_delete": share["can_delete"]
+            })
+        
+        return {"shares": shares_list}
+        
+    except bson.errors.InvalidId:
+        objectid_misformatted()