Event Items now saved using JSON rather than an AJAX request

RIGS/forms.py

@@ -1,8 +1,12 @@
 __author__ = 'Ghost'
 from django import forms
 from django.utils import formats
-from RIGS import models
 from django.conf import settings
+from django.core import serializers
+import simplejson
+
+from RIGS import models
+
 
 # Events Shit
 class EventForm(forms.ModelForm):
@@ -11,6 +15,71 @@ class EventForm(forms.ModelForm):
     access_at = forms.DateTimeField(input_formats=datetime_input_formats, required=False)
     name = forms.CharField(min_length=3)
 
+    items_json = forms.CharField()
+
+    items = {}
+
+    @property
+    def _get_items_json(self):
+        items = {}
+        for item in self.instance.items.all():
+            data = serializers.serialize('json', [item])
+            struct = simplejson.loads(data)
+            items[item.pk] = simplejson.dumps(struct[0])
+        return simplejson.dumps(items)
+
+    def __init__(self, *args, **kwargs):
+        super(EventForm, self).__init__(*args, **kwargs)
+
+        self.fields['items_json'].initial = self._get_items_json
+
+    def process_items_json(self, event=None):
+        data = simplejson.loads(self.cleaned_data['items_json'])
+        items = {}
+        for key in data:
+            pk = int(key)
+            items[pk] = self._get_or_initialise_item(pk, data[key]['fields'], event)
+
+        return items
+
+    def _get_or_initialise_item(self, pk, data, event):
+        if (pk < 0):
+            item = models.EventItem()
+        else:
+            item = models.EventItem.objects.get(pk=pk)
+
+        item.name = data['name']
+        item.description = data['description']
+        item.quantity = data['quantity']
+        item.cost = data['cost']
+        item.order = data['order']
+
+        if (event):
+            item.event = event
+            item.full_clean()
+        else:
+            item.full_clean('event')
+
+        return item
+
+    def save(self, commit=True):
+        m = super(EventForm, self).save(commit=False)
+
+        if (commit):
+            m.save()
+            cur_items = m.items.all()
+            items = self.process_items_json(m)
+            # Delete any unneeded items
+            for item in cur_items:
+                if item.pk not in items:
+                    item.delete()
+
+            for key in items:
+                items[key].save()
+
+
+        return m
+
     class Meta:
         model = models.Event
         fields = ['is_rig', 'name', 'venue', 'start_date', 'start_time', 'end_date',