templates.py

# Python Standard Library Imports
import re

# HTK Imports
from htk.utils import htk_setting
from htk.utils import resolve_method_dynamically


def get_renderer():
    renderer = resolve_method_dynamically(htk_setting('HTK_TEMPLATE_RENDERER'))
    return renderer


def get_template_context_generator():
    wrap_data = resolve_method_dynamically(htk_setting('HTK_TEMPLATE_CONTEXT_GENERATOR'))
    return wrap_data


def generate_html_from_template(template_name, context_dict):
    """Generate HTML by using `template_name` inflated with `context_dict`
    """
    from django.template import TemplateDoesNotExist
    from django.template import loader
    try:
        template = loader.get_template(template_name)
        html = template.render(context_dict)
    except TemplateDoesNotExist:
        html = ''
    return html


def rewrite_relative_urls_as_absolute(html, base_url):
    """Rewrite relative URLs in `html` as absolute urls with `base_url`
    """
    html = re.sub(
        r'<(?P<tag>(?:a|link)[^>]*?(?:href|src))="(?P<path>/[^/][^>"]*?)"(?P<suffix>[^>]*?)>',
        #r'<(?P<tag>img[^>]*?src)="(?P<path>/[^/][^>"]*?)"(?P<suffix>[^>]*?)>',
        r'<\g<tag>="%s\g<path>"\g<suffix>>' % base_url,
        html
    )
    return html