__copyright__ = "Copyright © Stichting SciPost (SciPost Foundation)"
__license__ = "AGPL v3"


from rest_framework import serializers

from ..models import Publication


class PublicationSerializer(serializers.ModelSerializer):
    url = serializers.URLField(source='get_absolute_url')

    class Meta:
        model = Publication
        fields = [
            'title',
            'author_list',
            'abstract',
            'doi_label',
            'publication_date',
            'url'
        ]

    def __init__(self, *args, **kwargs):
        # Don't pass the 'fields' arg up to the superclass
        fields = kwargs.pop('fields', None)

        # Instantiate the superclass normally
        super().__init__(*args, **kwargs)

        if fields is not None:
            # Drop any fields that are not specified in the `fields` argument.
            allowed = set(fields)
            existing = set(self.fields)
            for field_name in existing - allowed:
                self.fields.pop(field_name)