"""Helper functions

Consists of functions to typically be used within templates, but also
available to Controllers. This module is available to both as 'h'.
"""
from routes import redirect_to, url_for

from webhelpers.html import (literal, HTML, escape)
from webhelpers.html.tools import (auto_link, button_to, highlight, js_obfuscate
                                   , mail_to, strip_links, strip_tags, tag_re)
from webhelpers.html.tags import (auto_discovery_link, checkbox, css_classes,
                                  end_form, file, form, hidden, image,
                                  javascript_link, link_to, link_to_if,
                                  link_to_unless, ol, required_legend,
                                  select, stylesheet_link,
                                  submit, text, textarea, title, ul, xml_declaration)
from webhelpers.text import (chop_at, collapse, convert_accented_entities,
                             convert_misc_characters, convert_misc_entities,
                             lchop, plural, rchop, remove_formatting, replace_whitespace,
                             urlify)

from webhelpers.pylonslib import Flash as _Flash
from webhelpers.pylonslib.secure_form import secure_form

#Custom helper here :)
class _Link(object):
    '''
    Make a url based on label and url with help of url_for
    @param label:name of link    if not defined url is used
    @param url: the url for link
    '''

    def __call__(self, label = '', *url, **urlargs):
        if label is None or '':
            label = url
        link_fn = link_to(label, url_for(*url, **urlargs))
        return link_fn


class _GetError(object):

    def __call__(self, field_name, form_errors):
        tmpl = """<span class="error_msg">%s</span>"""
        if form_errors and form_errors.has_key(field_name):
            return literal(tmpl % form_errors.get(field_name))

link = _Link()
flash = _Flash()
get_error = _GetError()