add new /sizes endpoint

uncloud_net/serializers.py

@@ -6,6 +6,8 @@ from rest_framework import serializers
 
 from .models import *
 from .services import *
+from .selectors import *
+
 
 class WireGuardVPNSerializer(serializers.ModelSerializer):
     address = serializers.CharField(read_only=True)
@@ -23,6 +25,14 @@ class WireGuardVPNSerializer(serializers.ModelSerializer):
         }
 
 
+    def validate_network_mask(self, value):
+        msg = _(f"No pool for network size {value}")
+        sizes = allowed_vpn_network_reservation_size()
+
+        if not value in sizes:
+            raise serializers.ValidationError(msg)
+
+
     def validate_wireguard_public_key(self, value):
         msg = _("Supplied key is not a valid wireguard public key")
 
@@ -41,3 +51,12 @@ class WireGuardVPNSerializer(serializers.ModelSerializer):
             raise serializers.ValidationError(msg)
 
         return value
+
+
+class WireGuardVPNSizesSerializer(serializers.Serializer):
+
+    size = serializers.IntegerField(min_value=0, max_value=128)
+
+    # sizes = serializers.ListField(
+    #     child=serializers.IntegerField(min_value=0, max_value=128)
+    # )