Add view suppliers view and suppliers API endpoint

This adds a simple view (mostly cribbed from the component view but
without the database stats) to view details for a given supplier,
currently lists the components they supply and name/email address pairs for
representatives however there's room to add fields for other representative
contact and company information as well.

On the API side this adds 3 endpoints:
    * api/suppliers: returns a list of all suppliers and their
    representatives
    * api/suppliers/<id>: returns a supplier object containing the
    representatives for the given supplier
    * api/suppliers/<id>/components: returns a supplier object
    containing a list of components supplied by the given supplier

This also contains minor documentation and base template changes, fixing
the navigation menu to use class="active" on the currently selected page
(previously didn't work due to page_name capitalization)

1 files changed, 15 insertions, 5 deletions

diff --git a/procurement/forms.py b/procurement/forms.py
index 4e8b0aa..0aeca9b 100644
--- a/procurement/forms.py
+++ b/procurement/forms.py
@@ -1,14 +1,24 @@
 from django import forms
-from procurement.models import Component
+from procurement.models import Component, Supplier
 
+class FormControlBase(forms.Form):
+    _formcontrol_fields = []
+    def __init__(self, *args, **kwargs):
+        super(FormControlBase, self).__init__(*args, **kwargs)
+        for fieldname in self._formcontrol_fields:
+            self.fields[fieldname].widget.attrs.update({"class": "form-control"})
 
-class ComponentSearchForm(forms.Form):
+class ComponentSearchForm(FormControlBase):
+    _formcontrol_fields = ["component"]
     component = forms.ModelChoiceField(
         queryset=Component.objects.all(),
         required=False
     )
 
-    def __init__(self, *args, **kwargs):
-        super(ComponentSearchForm, self).__init__(*args, **kwargs)
-        self.fields['component'].widget.attrs.update({"class": "form-control"})
+class SupplierSearchForm(FormControlBase):
+    _formcontrol_fields = ["supplier"]
+    supplier = forms.ModelChoiceField(
+        queryset=Supplier.objects.filter(is_authorized=True),
+        required=False
+    )