import py
from templess import templess

class SideBar(object):
    def render(self, request, siteroot, template, reserved):
        serverroot = request.document_root()
        tpath = py.path.local(template)
        template = templess.template(tpath.open())
        env = {
            'homeurl': '%s/' % siteroot,
            'items': self.get_items(serverroot, siteroot, reserved),
        }
        return list(list(template.render(env).find('body'))[0])

    def get_items(self, serverroot, siteroot, reserved):
        paths = (py.path.local(serverroot) / siteroot).listdir()
        ret = []
        for p in paths:
            name = p.purebasename.replace('_', ' ')
            if p.basename.startswith('.') or p.basename in reserved:
                continue
            url = self.mkurl(serverroot, p)
            ret.append({
                'url': url,
                'name': name,
            })
        ret.sort(lambda a, b: cmp(a['name'], b['name']))
        return ret

    def mkurl(self, serverroot, p):
        path = str(p)[len(serverroot):].replace(py.std.os.path.sep, '/')
        if not path.startswith('/'):
            path = '/%s' % path
        return path

# only have to have one instance
sidebar = SideBar()