from rest_framework.fields import SerializerMethodField
from rest_framework.serializers import ModelSerializer

from engine.blog.models import Post, PostTag
from engine.core.utils.markdown import render_markdown


class PostTagSerializer(ModelSerializer):
    class Meta:
        model = PostTag
        fields = "__all__"


class PostSerializer(ModelSerializer):
    tags = PostTagSerializer(many=True)
    content = SerializerMethodField()

    class Meta:
        model = Post
        fields = "__all__"

    def get_content(self, obj: Post) -> str:
        return render_markdown(obj.content or "")