"""Shared handler base classes."""

import tornado.web


class BasePageHandler(tornado.web.RequestHandler):
    """Base handler that injects ``base_url`` into all templates."""

    def static_url(self, path, **kwargs):
        url = super().static_url(path, **kwargs)
        base_url = self.application.settings.get("base_url", "/")
        if base_url != "/":
            url = base_url + url.lstrip("/")
        return url

    def get_template_namespace(self):
        ns = super().get_template_namespace()
        ns["base_url"] = self.application.settings.get("base_url", "/")
        return ns