# -*- coding: utf-8 -*-
"""Helper functions

Consists of functions to typically be used within templates, but also
available to Controllers. This module is available to both as 'h'.
"""
# Import helpers as desired, or define your own, ie:
# from webhelpers.html.tags import checkbox, password
from webhelpers import *
from routes import url_for, redirect_to
from pylons import config, url

# Scaffolding helper imports
from webhelpers.html.tags import *
from webhelpers.html.tools import *
from webhelpers.html import HTML, literal
from webhelpers.pylonslib import Flash
import sqlalchemy.types as types
flash = Flash()
# End of.

from floof.lib import file_storage as storage

def get_object_or_404(model, **kw):
    from pylons.controllers.util import abort
    """
    Returns object, or raises a 404 Not Found is object is not in db.
    Uses elixir-specific `get_by()` convenience function (see elixir source:
    http://elixir.ematia.de/trac/browser/elixir/trunk/elixir/entity.py#L1082)
    Example: user = get_object_or_404(model.User, id = 1)
    """
    obj = model.get_by(**kw)
    if obj is None:
        abort(404)
    return obj

def get_comment_owner_url(**route):
    """Given a view route, returns the owner_url route parameter for generating
    comment URLs.
    """
    if 'owner_url' in route:
        # We're already in a comments page.  Reuse the existing owner URL
        return route['owner_url']

    # url() returns URLs beginning with a slash.  We just need to strip it.
    return url(**route)[1:]

def storage_url(prefix, identifier):
    """Returns a URL for the given object-in-storage."""
    return storage.get_path(prefix, identifier)