import graphene
from graphql import GraphQLError

from vbv_lernwelt.course.graphql.types import CourseType
from vbv_lernwelt.course.models import Course
from vbv_lernwelt.course.permissions import has_course_access


class CourseQuery:
    course = graphene.Field(CourseType, id=graphene.Int())

    def resolve_course(root, info, id):
        course = Course.objects.get(pk=id)
        if has_course_access(info.context.user, course):
            return course
        return GraphQLError("You do not have access to this course")