local changes from server

[redakcja.git] / apps / forms_builder / forms / utils.py

diff --git a/apps/forms_builder/forms/utils.py b/apps/forms_builder/forms/utils.py
new file mode 100644 (file)
index 0000000..58063c8
--- /dev/null
+++ b/apps/forms_builder/forms/utils.py
@@ -0,0 +1,63 @@
+from __future__ import unicode_literals
+
+from django.template.defaultfilters import slugify as django_slugify
+from importlib import import_module
+from unidecode import unidecode
+
+
+# Timezone support with fallback.
+try:
+    from django.utils.timezone import now
+except ImportError:
+    from datetime import datetime
+    now = datetime.now
+
+
+def slugify(s):
+    """
+    Translates unicode into closest possible ascii chars before
+    slugifying.
+    """
+    from future.builtins import str
+    return django_slugify(unidecode(str(s)))
+
+
+def unique_slug(manager, slug_field, slug):
+    """
+    Ensure slug is unique for the given manager, appending a digit
+    if it isn't.
+    """
+    i = 0
+    while True:
+        if i > 0:
+            if i > 1:
+                slug = slug.rsplit("-", 1)[0]
+            slug = "%s-%s" % (slug, i)
+        if not manager.filter(**{slug_field: slug}):
+            break
+        i += 1
+    return slug
+
+
+def split_choices(choices_string):
+    """
+    Convert a comma separated choices string to a list.
+    """
+    return [x.strip() for x in choices_string.split(",") if x.strip()]
+
+
+def html5_field(name, base):
+    """
+    Takes a Django form field class and returns a subclass of
+    it with the given name as its input type.
+    """
+    return type(str(""), (base,), {"input_type": name})
+
+
+def import_attr(path):
+    """
+    Given a a Python dotted path to a variable in a module,
+    imports the module and returns the variable in it.
+    """
+    module_path, attr_name = path.rsplit(".", 1)
+    return getattr(import_module(module_path), attr_name)