Use a formset in submit layer form to handle maintainers

Formsets allow us to have separate fields for name/email for each
maintainer, as well as being able to collect the responsibility field
value. Also split the form to be output field-by-field to allow styling.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

layerindex/forms.py

@@ -4,14 +4,42 @@
 #
 # Licensed under the MIT license, see COPYING.MIT for details
 
-from layerindex.models import LayerItem
+from layerindex.models import LayerItem, LayerMaintainer
 from django import forms
 from django.core.validators import URLValidator, RegexValidator, email_re
+from django.forms.models import inlineformset_factory
 import re
 
+
+class LayerMaintainerForm(forms.ModelForm):
+    class Meta:
+        model = LayerMaintainer
+        fields = ('name', 'email', 'responsibility')
+
+    def clean_email(self):
+        email = self.cleaned_data['email'].strip()
+        if email:
+            if len(email) < 7:
+                raise forms.ValidationError('%s is not a valid email address' % email)
+            reg = re.compile(email_re)
+            if not reg.match(email):
+                raise forms.ValidationError('%s is not a valid email address' % email)
+
+        return email
+
+class BaseLayerMaintainerFormSet(forms.models.BaseInlineFormSet):
+    def _construct_form(self, i, **kwargs):
+        f = super(BaseLayerMaintainerFormSet, self)._construct_form(i, **kwargs)
+        # Ensure the first form in the formset gets filled in
+        if i == 0:
+            f.empty_permitted = False
+            f.required = True
+        return f
+
+LayerMaintainerFormSet = inlineformset_factory(LayerItem, LayerMaintainer, form=LayerMaintainerForm, formset=BaseLayerMaintainerFormSet,  can_delete=False)
+
 class SubmitLayerForm(forms.ModelForm):
     # Additional form fields
-    maintainers = forms.CharField(max_length=200)
     deps = forms.ModelMultipleChoiceField(label='Other layers this layer depends upon', queryset=LayerItem.objects.all(), required=False)
 
     class Meta:
@@ -55,21 +83,3 @@ class SubmitLayerForm(forms.ModelForm):
             val = URLValidator(verify_exists=False)
             val(url)
         return url
-
-    def clean_maintainers(self):
-        maintainers = self.cleaned_data['maintainers'].strip()
-        addrs = re.split(r'"?([^"@$<>]+)"? *<([^<> ]+)>,? *', maintainers)
-        addrs = [addr.strip() for addr in addrs if addr]
-        if addrs and len(addrs) % 2 == 0:
-            addrdict = {}
-            reg = re.compile(email_re)
-            for i in range(0, len(addrs)-1,2):
-                email = addrs[i+1]
-                if not reg.match(email):
-                    raise forms.ValidationError('%s is not a valid email address' % email)
-                addrdict[addrs[i]] = email
-            maintainers = addrdict
-        else:
-            raise forms.ValidationError('Please enter one or more maintainers in email address format (i.e. "Full Name <emailaddress@example.com> separated by commas")')
-
-        return maintainers

layerindex/submitlayer.html

@@ -20,7 +20,36 @@
 
 <form action="{% url submit_layer %}" method="post">
 {% csrf_token %}
-{{ form.as_p }}
+    {% for hidden in form.hidden_fields %}
+        {{ hidden }}
+    {% endfor %}
+
+    {% for field in form.visible_fields %}
+        <div class="fieldWrapper">
+            {{ field.errors }}
+            {{ field.label_tag }}
+            {{ field }}
+            {{ field.help_text }}
+        </div>
+    {% endfor %}
+    <h3>Maintainers</h3>
+    {{ maintainerformset.non_form_errors }}
+    {{ maintainerformset.management_form }}
+    {% for maintainerform in maintainerformset %}
+        <h4>Maintainer {{forloop.counter}}</h4>
+        {% for hidden in maintainerform.hidden_fields %}
+            {{ hidden }}
+        {% endfor %}
+
+        {% for field in maintainerform.visible_fields %}
+            <div class="fieldWrapper">
+                {{ field.errors }}
+                {{ field.label_tag }}
+                {{ field }}
+                {{ field.help_text }}
+            </div>
+        {% endfor %}
+    {% endfor %}
 <input type="submit" value="Submit" class='btn' />
 </form>
 

layerindex/views.py

@@ -12,7 +12,7 @@ from django.template import RequestContext
 from layerindex.models import LayerItem, LayerMaintainer, LayerDependency, Recipe
 from datetime import datetime
 from django.views.generic import DetailView, ListView
-from layerindex.forms import SubmitLayerForm
+from layerindex.forms import SubmitLayerForm, LayerMaintainerFormSet
 from django.db import transaction
 from django.contrib.auth.models import User, Permission
 from django.db.models import Q
@@ -27,17 +27,12 @@ def submit_layer(request):
     if request.method == 'POST':
         layeritem = LayerItem()
         form = SubmitLayerForm(request.POST, instance=layeritem)
-        if form.is_valid():
+        maintainerformset = LayerMaintainerFormSet(request.POST, instance=layeritem)
+        if form.is_valid() and maintainerformset.is_valid():
             with transaction.commit_on_success():
                 layeritem.created_date = datetime.now()
                 form.save()
-                # Save maintainers
+                maintainerformset.save()
-                for name, email in form.cleaned_data['maintainers'].items():
-                    maint = LayerMaintainer()
-                    maint.layer = layeritem
-                    maint.name = name
-                    maint.email = email
-                    maint.save()
                 # Save dependencies
                 for dep in form.cleaned_data['deps']:
                     deprec = LayerDependency()
@@ -63,9 +58,11 @@ def submit_layer(request):
                 return HttpResponseRedirect(reverse('submit_layer_thanks'))
     else:
         form = SubmitLayerForm()
+        maintainerformset = LayerMaintainerFormSet()
 
     return render(request, 'layerindex/submitlayer.html', {
         'form': form,
+        'maintainerformset': maintainerformset,
     })
 
 def submit_layer_thanks(request):