Enhanced sponsorship features

It is a part of feedback from PyConJP development.
Here picks a sponsorship benefit management enhancement.

* sponsor zip download
* export sponsor data as csv

```
commit eb3261c12c910ec562e016f10431cc48747baef8
Author: Dan Poirier <dpoirier@caktusgroup.com>
Date:   Wed Aug 21 11:51:20 2013 -0400

    Enhanced sponsor admin page

    For #67:

    * admin list sorted by name
    * not limited to 100 per page
    * a sortable visual indicator for each sponsorship benefit
      (completed, missing, not applicable)
    * also the sponsorship level, admin contact name, and an active
      or not indication
    * the ones we have today: print logo, web logo, print
      description, web description and the ad.
    * an action pick list like “email” and check mark the sponsors
    * I want to email based on the assets that are missing.
    * in subject and body, replace %%NAME%% by sponsor name
```

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

symposion/sponsorship/urls.py

@@ -7,5 +7,6 @@ urlpatterns = patterns(
     url(r"^$", TemplateView.as_view(template_name="sponsorship/list.html"), name="sponsor_list"),
     url(r"^apply/$", "sponsor_apply", name="sponsor_apply"),
     url(r"^add/$", "sponsor_add", name="sponsor_add"),
+    url(r"^ziplogos/$", "sponsor_zip_logo_files", name="sponsor_zip_logos"),
     url(r"^(?P<pk>\d+)/$", "sponsor_detail", name="sponsor_detail"),
 )

symposion/sponsorship/views.py

@@ -1,13 +1,28 @@
-from django.http import Http404
+from cStringIO import StringIO
+import itertools
+import logging
+import os
+import time
+from zipfile import ZipFile, ZipInfo
+
+from django.conf import settings
+
+from django.http import Http404, HttpResponse
 from django.shortcuts import render_to_response, redirect, get_object_or_404
 from django.template import RequestContext
+from django.utils.translation import ugettext_lazy as _
 
 from django.contrib import messages
+from django.contrib.admin.views.decorators import staff_member_required
 from django.contrib.auth.decorators import login_required
 
-from symposion.sponsorship.forms import SponsorApplicationForm, SponsorDetailsForm, \
-    SponsorBenefitsFormSet
-from symposion.sponsorship.models import Sponsor, SponsorBenefit
+from symposion.sponsorship.forms import SponsorApplicationForm, \
+    SponsorDetailsForm, SponsorBenefitsFormSet
+from symposion.sponsorship.models import Benefit, Sponsor, SponsorBenefit, \
+    SponsorLevel
+
+
+log = logging.getLogger(__name__)
 
 
 @login_required
@@ -18,13 +33,13 @@ def sponsor_apply(request):
             sponsor = form.save()
             if sponsor.sponsor_benefits.all():
                 # Redirect user to sponsor_detail to give extra information.
-                messages.success(request, "Thank you for your sponsorship "
+                messages.success(request, _("Thank you for your sponsorship "
                                             "application. Please update your "
-                                 "benefit details below.")
+                                            "benefit details below."))
                 return redirect("sponsor_detail", pk=sponsor.pk)
             else:
-                messages.success(request, "Thank you for your sponsorship "
-                                 "application.")
+                messages.success(request, _("Thank you for your sponsorship "
+                                            "application."))
                 return redirect("dashboard")
     else:
         form = SponsorApplicationForm(user=request.user)
@@ -87,3 +102,96 @@ def sponsor_detail(request, pk):
         "form": form,
         "formset": formset,
     }, context_instance=RequestContext(request))
+
+
+@staff_member_required
+def sponsor_export_data(request):
+    sponsors = []
+    data = ""
+
+    for sponsor in Sponsor.objects.order_by("added"):
+        d = {
+            "name": sponsor.name,
+            "url": sponsor.external_url,
+            "level": (sponsor.level.order, sponsor.level.name),
+            "description": "",
+        }
+        for sponsor_benefit in sponsor.sponsor_benefits.all():
+            if sponsor_benefit.benefit_id == 2:
+                d["description"] = sponsor_benefit.text
+        sponsors.append(d)
+
+    def izip_longest(*args):
+        fv = None
+
+        def sentinel(counter=([fv] * (len(args) - 1)).pop):
+            yield counter()
+        iters = [itertools.chain(it, sentinel(), itertools.repeat(fv)) for it in args]
+        try:
+            for tup in itertools.izip(*iters):
+                yield tup
+        except IndexError:
+            pass
+
+    def pairwise(iterable):
+        a, b = itertools.tee(iterable)
+        b.next()
+        return izip_longest(a, b)
+
+    def level_key(s):
+        return s["level"]
+
+    for level, level_sponsors in itertools.groupby(sorted(sponsors, key=level_key), level_key):
+        data += "%s\n" % ("-" * (len(level[1]) + 4))
+        data += "| %s |\n" % level[1]
+        data += "%s\n\n" % ("-" * (len(level[1]) + 4))
+        for sponsor, next in pairwise(level_sponsors):
+            description = sponsor["description"].strip()
+            description = description if description else "-- NO DESCRIPTION FOR THIS SPONSOR --"
+            data += "%s\n\n%s" % (sponsor["name"], description)
+            if next is not None:
+                data += "\n\n%s\n\n" % ("-" * 80)
+            else:
+                data += "\n\n"
+
+    return HttpResponse(data, content_type="text/plain;charset=utf-8")
+
+
+@staff_member_required
+def sponsor_zip_logo_files(request):
+    """Return a zip file of sponsor web and print logos"""
+
+    zip_stringio = StringIO()
+    zipfile = ZipFile(zip_stringio, "w")
+    try:
+        benefits = Benefit.objects.all()
+        for benefit in benefits:
+            dir_name = benefit.name.lower().replace(" ", "_").replace('/', '_')
+            for level in SponsorLevel.objects.all():
+                level_name = level.name.lower().replace(" ", "_").replace('/', '_')
+                for sponsor in Sponsor.objects.filter(level=level, active=True):
+                    sponsor_name = sponsor.name.lower().replace(" ", "_").replace('/', '_')
+                    full_dir = "/".join([dir_name, level_name, sponsor_name])
+                    for sponsor_benefit in SponsorBenefit.objects.filter(
+                        benefit=benefit,
+                        sponsor=sponsor,
+                        active=True,
+                    ).exclude(upload=''):
+                        if os.path.exists(sponsor_benefit.upload.path):
+                            modtime = time.gmtime(os.stat(sponsor_benefit.upload.path).st_mtime)
+                            with open(sponsor_benefit.upload.path, "rb") as f:
+                                fname = os.path.split(sponsor_benefit.upload.name)[-1]
+                                zipinfo = ZipInfo(filename=full_dir + "/" + fname,
+                                                  date_time=modtime)
+                                zipfile.writestr(zipinfo, f.read())
+                        else:
+                            log.debug("No such sponsor file: %s" % sponsor_benefit.upload.path)
+    finally:
+        zipfile.close()
+
+    response = HttpResponse(zip_stringio.getvalue(),
+                            content_type="application/zip")
+    prefix = settings.CONFERENCE_URL_PREFIXES[settings.CONFERENCE_ID]
+    response['Content-Disposition'] = \
+        'attachment; filename="%s_sponsorlogos.zip"' % prefix
+    return response