Added SHORTURLS_DEFAULT_CONVERTER setting so template tag converter can be specified

4 files changed, 36 insertions, 4 deletions

diff --git a/README.md b/README.md
index 797bd78..f933880 100644
--- a/README.md
+++ b/README.md
@@ -87,3 +87,16 @@ differ.
 If not defined, the redirect view will try to guess the proper domain by
 consulting the ``django.contrib.sites`` framework, if installed, or the
 requested domain, if not.
+
+#### ``SHORTURLS_DEFAULT_CONVERTER``
+
+The converter that is used to translate between short URLs and model IDs.
+Defaults to the built in base 62 conversion.
+
+Available converters:
+
+ - `shorturls.baseconv.base62` Base 62 encoding.
+ - `shorturls.baseconv.base32` [Douglas Crockford's base 32.](http://www.crockford.com/wrmg/base32.html)
+ - `shorturls.baseconv.hexconv` Hex encoding.
+ - `shorturls.baseconv.bin` Binary encoding, because why not.
+
diff --git a/src/shorturls/__init__.py b/src/shorturls/__init__.py
index e69de29..528e838 100644
--- a/src/shorturls/__init__.py
+++ b/src/shorturls/__init__.py
@@ -0,0 +1,19 @@
+from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
+from django.utils.importlib import import_module
+from shorturls import baseconv
+
+default_converter = baseconv.base62
+
+if hasattr(settings, 'SHORTURLS_DEFAULT_CONVERTER'):
+    mod_name, conv_name = settings.SHORTURLS_DEFAULT_CONVERTER.rsplit('.', 1)
+    try:
+        mod = import_module(mod_name)
+    except ImportError, e:
+        raise ImproperlyConfigured('Could not load converter specified by SHORTURLS_DEFAULT_CONVERTER. Error was: %s' % e)
+    try:
+        default_converter = getattr(mod, conv_name)
+    except AttributeError:
+        raise ImproperlyConfigured('Could not load converter specified by SHORTURLS_DEFAULT_CONVERTER. %s is not in %s.' % (conv_name, mod))
+
+    
\ No newline at end of file
diff --git a/src/shorturls/templatetags/shorturl.py b/src/shorturls/templatetags/shorturl.py
index e1781cc..4c98d87 100644
--- a/src/shorturls/templatetags/shorturl.py
+++ b/src/shorturls/templatetags/shorturl.py
@@ -3,7 +3,7 @@ from django import template
 from django.conf import settings
 from django.core import urlresolvers
 from django.utils.safestring import mark_safe
-from shorturls.baseconv import base62
+from shorturls import default_converter as converter
 
 class ShortURL(template.Node):
     @classmethod
@@ -27,7 +27,7 @@ class ShortURL(template.Node):
         except (AttributeError, KeyError):
             return ''
         
-        tinyid = base62.from_decimal(obj.pk)
+        tinyid = converter.from_decimal(obj.pk)
                 
         if hasattr(settings, 'SHORT_BASE_URL') and settings.SHORT_BASE_URL:
             return urlparse.urljoin(settings.SHORT_BASE_URL, prefix+tinyid)
diff --git a/src/shorturls/views.py b/src/shorturls/views.py
index 2d0ef1a..2d0a47b 100644
--- a/src/shorturls/views.py
+++ b/src/shorturls/views.py
@@ -4,9 +4,9 @@ from django.contrib.sites.models import Site, RequestSite
 from django.db import models
 from django.http import HttpResponsePermanentRedirect, Http404
 from django.shortcuts import get_object_or_404
-from shorturls.baseconv import base62
+from shorturls import default_converter
 
-def redirect(request, prefix, tiny, converter=base62):
+def redirect(request, prefix, tiny, converter=default_converter):
     """
     Redirect to a given object from a short URL.
     """