create tracking of downloads and reporting in admin

website/education/admin.py

 """
 This module registers admin pages for the models
 """
+import csv
+
 from django.contrib import admin
+from django.http import HttpResponse
 from django.utils.translation import ugettext_lazy as _
 
 from utils.translation import TranslatedModelAdmin
@@ -22,11 +25,12 @@ class CourseAdmin(TranslatedModelAdmin):
 @admin.register(models.Exam)
 class ExamAdmin(TranslatedModelAdmin):
     list_display = ('type', 'course', 'exam_date', 'uploader',
-                    'accepted')
+                    'accepted', 'download_count')
+    readonly_fields = ('download_count',)
     list_filter = ('accepted', 'exam_date', 'type',)
     search_fields = ('name', 'uploader__first_name', 'uploader__last_name',
                      'course__name_nl', 'course__name_en',)
-    actions = ['accept', 'reject']
+    actions = ['accept', 'reject', 'reset_download_count', 'download_csv']
 
     def accept(self, request, queryset):
         queryset.update(accepted=True)
@@ -38,14 +42,38 @@ class ExamAdmin(TranslatedModelAdmin):
 
     reject.short_description = _("Mark exams as rejected")
 
+    def reset_download_count(self, request, queryset):
+        queryset.update(download_count=0)
+
+    reset_download_count.short_description = _("Reset the marked exams "
+                                               "download count")
+
+    def download_csv(self, request, queryset):
+        opts = queryset.model._meta
+        response = HttpResponse(content_type='text/csv')
+        # force download.
+        response['Content-Disposition'] = 'attachment;filename=export.csv'
+        # the csv writer
+        writer = csv.writer(response)
+        field_names = [field.name for field in opts.fields]
+        # Write a first row with header information
+        writer.writerow(field_names)
+        # Write data rows
+        for obj in queryset:
+            writer.writerow([getattr(obj, field) for field in field_names])
+        return response
+
+    download_csv.short_description = _("Download marked as csv")
+
 
 @admin.register(models.Summary)
 class SummaryAdmin(TranslatedModelAdmin):
-    list_display = ('name', 'course', 'uploader', 'accepted')
+    list_display = ('name', 'course', 'uploader', 'accepted', 'download_count')
+    readonly_fields = ('download_count',)
     list_filter = ('accepted',)
     search_fields = ('name', 'uploader__first_name', 'uploader__last_name',
                      'course__name_nl', 'course__name_en',)
-    actions = ['accept', 'reject']
+    actions = ['accept', 'reject', 'reset_download_count', 'download_csv']
 
     def accept(self, request, queryset):
         queryset.update(accepted=True)
@@ -56,3 +84,26 @@ class SummaryAdmin(TranslatedModelAdmin):
         queryset.update(accepted=False)
 
     reject.short_description = _("Mark summaries as rejected")
+
+    def reset_download_count(self, request, queryset):
+        queryset.update(download_count=0)
+
+    reset_download_count.short_description = _("Reset the marked summaries "
+                                               "download count")
+
+    def download_csv(self, request, queryset):
+        opts = queryset.model._meta
+        response = HttpResponse(content_type='text/csv')
+        # force download.
+        response['Content-Disposition'] = 'attachment;filename=export.csv'
+        # the csv writer
+        writer = csv.writer(response)
+        field_names = [field.name for field in opts.fields]
+        # Write a first row with header information
+        writer.writerow(field_names)
+        # Write data rows
+        for obj in queryset:
+            writer.writerow([getattr(obj, field) for field in field_names])
+        return response
+
+    download_csv.short_description = _("Download marked as csv")

website/education/locale/nl/LC_MESSAGES/django.po

@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-02-12 14:06+0100\n"
-"PO-Revision-Date: 2018-02-12 13:42+0100\n"
+"POT-Creation-Date: 2018-05-16 20:01+0200\n"
+"PO-Revision-Date: 2018-05-16 20:03+0200\n"
 "Last-Translator: Sébastiaan Versteeg <se_bastiaan@outlook.com>\n"
 "Language-Team: \n"
 "Language: nl\n"
@@ -16,24 +16,36 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
-"X-Generator: Poedit 2.0.6\n"
+"X-Generator: Poedit 1.8.7.1\n"
 
-#: admin.py:34
+#: admin.py:38
 msgid "Mark exams as accepted"
 msgstr "Markeer tentamens als geaccepteerd"
 
-#: admin.py:39
+#: admin.py:43
 msgid "Mark exams as rejected"
 msgstr "Markeer tentamens als afgekeurd"
 
-#: admin.py:53
+#: admin.py:48
+msgid "Reset the marked exams download count"
+msgstr "Reset download aantal van gemarkeerde tentamens"
+
+#: admin.py:67 admin.py:111
+msgid "Download marked as csv"
+msgstr "Download gemarkeerde tentamens als csv"
+
+#: admin.py:82
 msgid "Mark summaries as accepted"
 msgstr "Markeer samenvattingen als geaccepteerd"
 
-#: admin.py:58
+#: admin.py:87
 msgid "Mark summaries as rejected"
 msgstr "Markeer samenvattingen als afgekeurd"
 
+#: admin.py:92
+msgid "Reset the marked summaries download count"
+msgstr "Reset download aantal van gemarkeerde samenvattingen"
+
 #: apps.py:7
 msgid "Education"
 msgstr "Onderwijs"
@@ -58,7 +70,7 @@ msgstr "EC"
 msgid "period"
 msgstr "periode"
 
-#: models.py:77 models.py:132 models.py:180
+#: models.py:77 models.py:132 models.py:186
 msgid "course"
 msgstr "vak"
 
@@ -110,11 +122,11 @@ msgstr "type tentamen"
 msgid "exam name"
 msgstr "naam tentamen"
 
-#: models.py:107 models.py:163
+#: models.py:107 models.py:169
 msgid "uploader"
 msgstr "uploader"
 
-#: models.py:116 models.py:185
+#: models.py:116 models.py:191
 msgid "accepted"
 msgstr "geaccepteerd"
 
@@ -122,32 +134,36 @@ msgstr "geaccepteerd"
 msgid "exam date"
 msgstr "tentamendatum"
 
-#: models.py:126 models.py:191
+#: models.py:126 models.py:197
 msgid "Use the 'View on site' button to download the file for inspection."
 msgstr ""
 "Gebruik de ‘Toon op site’ knop om het bestand te downloaden voor controle."
 
-#: models.py:151
+#: models.py:137 models.py:202
+msgid "amount of downloads"
+msgstr "Hoeveelheid downloads"
+
+#: models.py:157
 msgid "exam"
 msgstr "tentamen"
 
-#: models.py:152
+#: models.py:158
 msgid "exams"
 msgstr "tentamens"
 
-#: models.py:158
+#: models.py:164
 msgid "summary name"
 msgstr "naam samenvatting"
 
-#: models.py:175
+#: models.py:181
 msgid "author"
 msgstr "auteur"
 
-#: models.py:203
+#: models.py:215
 msgid "summary"
 msgstr "samenvatting"
 
-#: models.py:204
+#: models.py:216
 msgid "summaries"
 msgstr "samenvattingen"
 

website/education/migrations/0008_auto_20180516_1935.py

+# Generated by Django 2.0.5 on 2018-05-16 17:35
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('education', '0007_rename_answers_type'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='exam',
+            name='download_count',
+            field=models.IntegerField(default=0, verbose_name='amount of downloads'),
+        ),
+        migrations.AddField(
+            model_name='summary',
+            name='download_count',
+            field=models.IntegerField(default=0, verbose_name='amount of downloads'),
+        ),
+    ]

website/education/models.py

@@ -133,6 +133,12 @@ class Exam(models.Model, metaclass=ModelTranslateMeta):
         on_delete=models.CASCADE,
     )
 
+    download_count = models.IntegerField(
+        verbose_name=_('amount of downloads'),
+        default=0,
+        blank=False,
+    )
+
     def __str__(self):
         return "{} {} ({}, {}, {})".format(self.name.capitalize(),
                                            self.type.capitalize(),
@@ -192,6 +198,12 @@ class Summary(models.Model, metaclass=ModelTranslateMeta):
                     'the file for inspection.')
     )
 
+    download_count = models.IntegerField(
+        verbose_name=_('amount of downloads'),
+        default=0,
+        blank=False,
+    )
+
     def __str__(self):
         return "{} ({}, {}, {})".format(self.name, self.course.name,
                                         self.course.course_code, self.year)

website/education/views.py

@@ -54,6 +54,10 @@ def student_participation(request):
 @login_required
 def exam(request, id):
     exam = get_object_or_404(Exam, id=int(id))
+
+    exam.download_count += 1
+    exam.save()
+
     ext = os.path.splitext(exam.file.path)[1]
     filename = '{}-exam{}{}'.format(exam.course.name, exam.year, ext)
     return sendfile(request, exam.file.path,
@@ -63,6 +67,10 @@ def exam(request, id):
 @login_required
 def summary(request, id):
     obj = get_object_or_404(Summary, id=int(id))
+
+    obj.download_count += 1
+    obj.save()
+
     ext = os.path.splitext(obj.file.path)[1]
     filename = '{}-summary{}{}'.format(obj.course.name, obj.year, ext)
     return sendfile(request, obj.file.path,