#26 Annual conservation report

* adds first try for excel file downloading (WIP)

analysis/utils/report.py

@@ -5,10 +5,13 @@ Contact: michel.peltriaux@sgdnord.rlp.de
 Created on: 18.10.21
 
 """
+from tempfile import NamedTemporaryFile
+
 from django.contrib.gis.db.models import MultiPolygonField
 from django.contrib.gis.db.models.functions import NumGeometries
 from django.db.models import Count, Sum, Q
 from django.db.models.functions import Cast
+from openpyxl import Workbook
 
 from analysis.settings import LKOMPVZVO_PUBLISH_DATE
 from codelist.models import KonovaCode
@@ -16,6 +19,7 @@ from codelist.settings import CODELIST_LAW_ID
 from compensation.models import Compensation, Payment, EcoAccountDeduction, EcoAccount
 from intervention.models import Intervention
 from konova.models import Geometry
+from konova.utils.generators import generate_random_string
 
 
 class TimespanReport:
@@ -363,3 +367,12 @@ class TimespanReport:
         self.compensation_report = self.CompensationReport(self.office_id, date_from, date_to)
         self.eco_account_report = self.EcoAccountReport(self.office_id, date_from, date_to)
         self.old_intervention_report = self.OldInterventionReport(self.office_id, date_from, date_to)
+
+    def to_excel_file(self):
+        workbook = Workbook()
+        tmp_file = NamedTemporaryFile()
+        ws = workbook.active
+        ws["A1"] = "TEST"
+        workbook.save(tmp_file.name)
+        tmp_file.seek(0)
+        return tmp_file