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First public commit

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diff --git a/servo/views/purchases.py b/servo/views/purchases.py
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+# -*- coding: utf-8 -*-
+# Copyright (c) 2013, First Party Software
+# All rights reserved.
+
+# Redistribution and use in source and binary forms, with or without modification, 
+# are permitted provided that the following conditions are met:
+
+# 1. Redistributions of source code must retain the above copyright notice, 
+# this list of conditions and the following disclaimer.
+
+# 2. Redistributions in binary form must reproduce the above copyright notice, 
+# this list of conditions and the following disclaimer in the documentation 
+# and/or other materials provided with the distribution.
+
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+# SUCH DAMAGE.
+
+import gsxws
+
+from django.forms.models import modelform_factory
+from django.forms.models import inlineformset_factory
+
+from django.utils.translation import ugettext as _
+
+from django.shortcuts import render, redirect
+from servo.models.order import ServiceOrderItem
+from django.contrib.auth.decorators import permission_required
+from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
+
+from django.contrib import messages
+
+from servo.models import Product, GsxAccount, PurchaseOrder, PurchaseOrderItem
+from servo.forms import PurchaseOrderItemEditForm, PurchaseOrderSearchForm
+
+
+@permission_required("servo.change_purchaseorder")
+def list_pos(request):
+    from datetime import timedelta
+    from django.utils import timezone
+    from django.db.models import Sum
+
+    now = timezone.now()
+    data = {'title': _("Purchase Orders")}
+
+    initial = {'start_date': now - timedelta(days=30), 'end_date': now}
+    all_orders = PurchaseOrder.objects.filter(
+        created_at__range=(initial['start_date'], initial['end_date'])
+    )
+
+    form = PurchaseOrderSearchForm(initial=initial)
+
+    if request.method == 'POST':
+        all_orders = PurchaseOrder.objects.all()
+        form = PurchaseOrderSearchForm(request.POST, initial=initial)
+
+        if form.is_valid():
+            fdata = form.cleaned_data
+            reference = fdata.get('reference')
+            if reference:
+                all_orders = all_orders.filter(reference__contains=reference)
+            if fdata.get('state') == 'open':
+                all_orders = all_orders.filter(submitted_at=None)
+            if fdata.get('state') == 'submitted':
+                all_orders = all_orders.exclude(submitted_at=None)
+            if fdata.get('state') == 'received':
+                all_orders = all_orders.exclude(has_arrived=True)
+            s, e = (fdata.get('start_date'), fdata.get('end_date'))
+            if s and e:
+                all_orders = all_orders.filter(created_at__range=(s, e))
+            created_by = fdata.get('created_by')
+            if created_by:
+                all_orders = all_orders.filter(created_by=created_by)
+
+    page = request.GET.get("page")
+    paginator = Paginator(all_orders, 50)
+
+    try:
+        orders = paginator.page(page)
+    except PageNotAnInteger:
+        orders = paginator.page(1)
+    except EmptyPage:
+        orders = paginator.page(paginator.num_pages)
+
+    data['orders'] = orders
+    data['form'] = form
+    data['total'] = all_orders.aggregate(Sum('total'))
+    return render(request, "purchases/list_pos.html", data)
+
+
+@permission_required("servo.change_purchaseorder")
+def delete_from_po(request, pk, item_id):
+    # @TODO - decrement amount_ordered?
+    po = PurchaseOrder.objects.get(pk=pk)
+    poi = PurchaseOrderItem.objects.get(pk=item_id)
+    poi.delete()
+    messages.success(request, _(u'Product %s removed' % poi.product.code))
+    return redirect(po)
+
+
+@permission_required("servo.change_purchaseorder")
+def add_to_po(request, pk, product_id):
+    po = PurchaseOrder.objects.get(pk=pk)
+    product = Product.objects.get(pk=product_id)
+    po.add_product(product, 1, request.user)
+    messages.success(request, _(u"Product %s added" % product.code))
+    return redirect(edit_po, po.pk)
+
+
+def view_po(request, pk):
+    po = PurchaseOrder.objects.get(pk=pk)
+    title = _('Purchase Order %d' % po.pk)
+    return render(request, "purchases/view_po.html", locals())
+
+
+@permission_required("servo.change_purchaseorder")
+def edit_po(request, pk, item_id=None):
+
+    if pk is not None:
+        po = PurchaseOrder.objects.get(pk=pk)
+    else:
+        po = PurchaseOrder(created_by=request.user)
+
+    PurchaseOrderForm = modelform_factory(PurchaseOrder, exclude=[])
+    form = PurchaseOrderForm(instance=po)
+
+    ItemFormset = inlineformset_factory(
+        PurchaseOrder,
+        PurchaseOrderItem,
+        extra=0,
+        form=PurchaseOrderItemEditForm,
+        exclude=[]
+    )
+
+    formset = ItemFormset(instance=po)
+
+    if request.method == "POST":
+
+        form = PurchaseOrderForm(request.POST, instance=po)
+
+        if form.is_valid():
+
+            po = form.save()
+            formset = ItemFormset(request.POST, instance=po)
+
+            if formset.is_valid():
+
+                formset.save()
+                msg = _("Purchase Order %d saved" % po.pk)
+
+                if "confirm" in request.POST.keys():
+                    po.submit(request.user)
+                    msg = _("Purchase Order %d submitted") % po.pk
+
+                messages.success(request, msg)
+                return redirect(list_pos)
+
+    request.session['current_po'] = po
+    data = {'order': po, 'form': form}
+    data['formset'] = formset
+    data['title'] = _('Purchase Order #%d' % po.pk)
+
+    return render(request, "purchases/edit_po.html", data)
+
+
+@permission_required("servo.change_purchaseorder")
+def order_stock(request, po_id):
+    """
+    Submits the PO as a GSX Stocking Order
+    Using the default GSX account.
+    """
+    po = PurchaseOrder.objects.get(pk=po_id)
+
+    if request.method == "POST":
+        if po.submitted_at:
+            messages.error(request, _(u'Purchase Order %s has already been submitted') % po.pk)
+            return list_pos(request)
+
+        act = GsxAccount.default(request.user)
+
+        stock_order = gsxws.StockingOrder(
+            shipToCode=act.ship_to,
+            purchaseOrderNumber=po.id
+        )
+
+        for i in po.purchaseorderitem_set.all():
+            stock_order.add_part(i.code, i.amount)
+
+        try:
+            result = stock_order.submit()
+            po.supplier = "Apple"
+            po.confirmation = result.confirmationNumber
+            po.submit(request.user)
+            msg = _("Products ordered with confirmation %s" % po.confirmation)
+            messages.success(request, msg)
+        except gsxws.GsxError, e:
+            messages.error(request, e)
+
+        return redirect(list_pos)
+
+    data = {'action': request.path}
+    return render(request, "purchases/order_stock.html", data)
+
+
+@permission_required('servo.delete_purchaseorder')
+def delete_po(request, po_id):
+    po = PurchaseOrder.objects.get(pk=po_id)
+    try:
+        po.delete()
+        messages.success(request, _("Purchase Order %s deleted" % po_id))
+    except Exception, e:
+        messages.error(request, e)
+    return redirect(list_pos)
+
+
+@permission_required('servo.add_purchaseorder')
+def create_po(request, product_id=None, order_id=None):
+    po = PurchaseOrder(created_by=request.user)
+    location = request.user.get_location()
+    po.location = location
+    po.save()
+
+    if order_id is not None:
+        po.sales_order_id = order_id
+        for i in ServiceOrderItem.objects.filter(order_id=order_id):
+            po.add_product(i, amount=1, user=request.user)
+
+    if product_id is not None:
+        product = Product.objects.get(pk=product_id)
+        po.add_product(product, amount=1, user=request.user)
+
+    messages.success(request, _("Purchase Order %d created" % po.pk))
+
+    return redirect(edit_po, po.pk)