network: initial host edit form

network/forms.py

 from django.forms import ModelForm
+from django.core.urlresolvers import reverse_lazy
+
+from crispy_forms.helper import FormHelper
+from crispy_forms.layout import Layout, Fieldset, Row, HTML
+from crispy_forms.layout import Div, ButtonHolder, Submit, BaseInput
+
 from firewall.models import Host
 
 
+class LinkButton(BaseInput):
+    """
+    Used to create a link button descriptor for the {% crispy %} template tag::
+
+        back = LinkButton('back', 'Back', reverse_lazy('index'))
+
+    .. note:: The first argument is also slugified and turned into the id for
+              the submit button.
+    """
+    template = "bootstrap/layout/linkbutton.html"
+    field_classes = 'btn'
+
+    def __init__(self, name, text, url, *args, **kwargs):
+        self.href = url
+        super(LinkButton, self).__init__(name, text, *args, **kwargs)
+
+
 class HostForm(ModelForm):
+    helper = FormHelper()
+    helper.layout = Layout(
+        Div(
+            Row(
+                Div(
+                    Fieldset(
+                        'Identity',
+                        'hostname',
+                        'reverse',
+                        'mac',
+                    ),
+                    Fieldset(
+                        'Network',
+                        'vlan',
+                        'ipv4',
+                        'ipv6',
+                        'shared_ip',
+                        'pub_ipv4',
+                    ),
+                    Fieldset(
+                        'Info',
+                        'description',
+                        'location',
+                        'comment',
+                        # 'created_at',
+                        # 'modified_at',
+                        # 'id'
+                    ),
+                    css_class='span8'),
+                Div(
+                    HTML('<p>hello</p>'),
+                    css_class='span4'),
+            ),
+            ButtonHolder(
+                Submit('submit', 'Save'),
+                LinkButton('back', 'Back', reverse_lazy(
+                    'network.host_list'))
+            ),
+            css_class="form-horizontal"))
+
     class Meta:
         model = Host

network/templates/bootstrap/layout/linkbutton.html

+<a href="{{ input.href }}"
+    id="{% if input.name|wordcount > 1 %}{{ input.name|slugify }}{% else %}{{ input.name }}{% endif %}"
+    value=""
+    class="{{ input.field_classes }}"
+    {{ input.flat_attrs|safe }}
+    >{{ input.value }}</a>