add new option type DateOption (thanks to Lohysia)

tiramisu/option/__init__.py

@@ -6,12 +6,12 @@ from .option import (ChoiceOption, BoolOption, IntOption, FloatOption,
                      StrOption, UnicodeOption, IPOption, PortOption,
                      NetworkOption, NetmaskOption, BroadcastOption,
                      DomainnameOption, EmailOption, URLOption, UsernameOption,
-                     FilenameOption, PasswordOption)
+                     DateOption, FilenameOption, PasswordOption)
 
 
 __all__ = ('MasterSlaves', 'OptionDescription', 'DynOptionDescription',
            'SynDynOptionDescription', 'Option', 'SymLinkOption',
-           'DynSymLinkOption', 'ChoiceOption', 'BoolOption',
+           'DynSymLinkOption', 'ChoiceOption', 'BoolOption', 'DateOption',
            'IntOption', 'FloatOption', 'StrOption', 'UnicodeOption',
            'IPOption', 'PortOption', 'NetworkOption', 'NetmaskOption',
            'BroadcastOption', 'DomainnameOption', 'EmailOption', 'URLOption',

tiramisu/option/option.py

@@ -619,3 +619,17 @@ class FilenameOption(_RegexpOption):
     __slots__ = tuple()
     _regexp = re.compile(r"^[a-zA-Z0-9\-\._~/+]+$")
     _display_name = _('file name')
+
+
+class DateOption(Option):
+    __slots__ = tuple()
+    _display_name = _('date')
+
+    def _validate(self, value, context=undefined, current_opt=undefined):
+        err = self._impl_valid_unicode(value)
+        if err:
+            return err
+        try:
+            datetime.datetime.strptime(value,"%Y-%m-%d")
+        except ValueError, err:
+            return ValueError()