#26 Annual conservation report

* adds first try for excel file downloading (WIP)

analysis/templates/analysis/reports/detail.html

@@ -3,10 +3,28 @@
 
 {% block body %}
     <div class="row">
-        <div class="col-sm-12 col-md-12 col-lg-12">
+        <div class="col-sm-12 col-md-12 col-lg-6">
             <h3>{% trans 'Evaluation report' %} {{office.long_name}}</h3>
             <h5>{% trans 'From' %} {{report.date_from.date}} {% trans 'to' %} {{report.date_to.date}}</h5>
         </div>
+        <div class="col-sm-12 col-md-12 col-lg-6">
+            <div class="d-flex justify-content-end">
+                <div class=" menu-elem dropdown">
+                    <div class="btn btn" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
+                        <button class="btn btn-default" title="{% trans 'Download' %}">
+                            {% fa5_icon 'download' %}
+                        </button>
+                    </div>
+                    <div class="dropdown-menu">
+                        <a href="{{request.url}}?format=excel&{{request.GET.urlencode}}">
+                            <button class="dropdown-item" title="Excel">
+                                {% fa5_icon 'file-excel' %} Excel
+                            </button>
+                        </a>
+                    </div>
+                </div>
+            </div>
+        </div>
     </div>
     <hr>
     <div class="col-sm-12 col-md-12 col-lg-12">

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

analysis/views.py

@@ -1,8 +1,7 @@
 from django.contrib import messages
 from django.contrib.auth.decorators import login_required
-from django.core.exceptions import ObjectDoesNotExist
-from django.http import HttpRequest
-from django.shortcuts import render, redirect
+from django.http import HttpRequest, FileResponse
+from django.shortcuts import render, redirect, get_object_or_404
 from django.utils import timezone
 
 from analysis.forms import TimespanReportForm
@@ -55,18 +54,17 @@ def detail_report_view(request: HttpRequest, id: str):
     Returns:
 
     """
+    # Try to resolve the requested office id
+    cons_office = get_object_or_404(
+        KonovaCode,
+        id=id
+    )
+    # Try to resolve the date parameters into Date objects -> redirect if this fails
     try:
-        cons_office = KonovaCode.objects.get(id=id)
-    except (ObjectDoesNotExist, ValueError) as e:
-        messages.error(
-            request,
-            PARAMS_INVALID,
-            extra_tags="danger",
-        )
-        return redirect("analysis:reports")
-    try:
-        date_from = timezone.make_aware(timezone.datetime.fromisoformat(request.GET.get("df", None)))
-        date_to = timezone.make_aware(timezone.datetime.fromisoformat(request.GET.get("dt", None)))
+        df = request.GET.get("df", None)
+        dt = request.GET.get("dt", None)
+        date_from = timezone.make_aware(timezone.datetime.fromisoformat(df))
+        date_to = timezone.make_aware(timezone.datetime.fromisoformat(dt))
     except ValueError:
         messages.error(
             request,
@@ -75,11 +73,24 @@ def detail_report_view(request: HttpRequest, id: str):
         )
         return redirect("analysis:reports")
 
+    # Check whether the html default rendering is requested or an alternative
+    format_param = request.GET.get("format", "html")
     report = TimespanReport(id, date_from, date_to)
-    template = "analysis/reports/detail.html"
-    context = {
-        "office": cons_office,
-        "report": report,
-    }
-    context = BaseContext(request, context).context
-    return render(request, template, context)
+
+    if format_param == "html":
+        template = "analysis/reports/detail.html"
+        context = {
+            "office": cons_office,
+            "report": report,
+        }
+        context = BaseContext(request, context).context
+        return render(request, template, context)
+    elif format_param == "excel":
+        stream = report.to_excel_file()
+        response = FileResponse(
+            filename=stream.name,
+        )
+        response['Content-Disposition'] = f'attachement;"'
+        return response
+    else:
+        raise NotImplementedError

requirements.txt

@@ -11,11 +11,14 @@ django-filter==2.4.0
 django-fontawesome-5==1.0.18
 django-simple-sso==1.1.0
 django-tables2==2.3.4
+et-xmlfile==1.1.0
 idna==2.10
 importlib-metadata==2.1.1
-itsdangerous
-psycopg2-binary
+itsdangerous==0.24
+openpyxl==3.0.9
+psycopg2-binary==2.9.1
 pytz==2020.4
+qrcode==7.3.1
 requests==2.25.0
 six==1.15.0
 soupsieve==2.2.1