from rest_framework import serializers
from .models import *


class VisitorSerializer(serializers.Serializer):
    name = serializers.CharField(required=True)
    clicked = serializers.IntegerField(read_only=True)
    first_pressed = serializers.DateTimeField(read_only=True)
    last_pressed = serializers.DateTimeField(read_only=True)

    def create(self, validated_data):
        """
        Create and return a new `Visitor` instance, given the validated data.
        """
        return Visitor.objects.create(**validated_data)

    def update(self, instance, validated_data):
        """
        Update and return an existing `Snippet` instance, given the validated data.
        """
        instance.name = validated_data.get('name', instance.name)
        instance.save()
        return instance