Export date range validation

wetter/templates/export.html

@@ -13,6 +13,10 @@
   <div class="alert alert-danger" role="alert">
     Ein oder mehrere Eingabefelder sind leer oder haben das falsche Format.
   </div>
+  {% elif e == "end-before-start" %}
+  <div class="alert alert-danger" role="alert">
+    Das Enddatum darf nicht vor dem Startdatum liegen.
+  </div>
   {% endif %}
   <h2>
     Export
@@ -23,13 +27,23 @@
       <div class="col-sm-6">
           <div class="form-group">
               <label for="datetimepicker-from">von</label>
-              <input type="date" value="{{ fr }}" name="from" class="form-control" id="datetimepicker-from" required>
+              <input type="date" value="{{ fr }}" name="from" class="form-control" id="datetimepicker-from" required max="{{ today }}">
           </div>
       </div>
       <div class="col-sm-6">
           <div class="form-group">
               <label for="datetimepicker-to">bis</label>
-              <input type="date" value="{{ to }}" name="to" class="form-control" id="datetimepicker-to" required>
+              <input type="date" value="{{ to }}" name="to" class="form-control" id="datetimepicker-to" required max="{{ today }}">
+          </div>
+      </div>
+  </div>
+  <div class="row">
+    <div class="col-sm-6">
+      <div class="form-group">
+        <div class="custom-control custom-checkbox">
+          <input type="checkbox" name="workdays-only" value="true" class="custom-control-input" id="workdays-only">
+          <label class="custom-control-label" for="workdays-only">Nur Montag bis Freitag</label>
+        </div>
       </div>
     </div>
   </div>
@@ -39,4 +53,12 @@
 {% endblock %}
 
 {% block foot %}
+<script>
+$("#datetimepicker-from").change(() => {
+  $("#datetimepicker-to").attr('min', $("#datetimepicker-from").val());
+});
+$("#datetimepicker-to").change(() => {
+  $("#datetimepicker-from").attr('max', $("#datetimepicker-to").val());
+});
+</script>
 {% endblock %}

wetter/templates/target.html

@@ -27,6 +27,16 @@
           </div>
       </div>
   </div>
+  <div class="row">
+    <div class="col-sm-6">
+      <div class="form-group">
+        <div class="custom-control custom-checkbox">
+          <input type="checkbox" class="custom-control-input" id="workdays-only" {% if workdays_only %}checked {% endif %}disabled>
+          <label class="custom-control-label" for="workdays-only">Nur Montag bis Freitag</label>
+        </div>
+      </div>
+    </div>
+  </div>
   <div class="row">
   <div class="col-md-6">
     <div class="card">

wetter/utils.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 
-from datetime import datetime
+from datetime import datetime, timedelta
 
 def fromisoformat(str):
     return datetime.strptime(str, '%Y-%m-%d').date()
@@ -10,3 +10,12 @@ def toisoformat(str, alt=""):
         return fromisoformat(str).isoformat()
     except:
         return alt
+
+def daterangeofdays(fr, to):
+    return [fr + timedelta(days=x) for x in range(0, (to - fr).days + 1)]
+
+def daterangefilterweekend(dates):
+    return [date for date in dates if date.weekday() < 5]
+
+def strtobool(s):
+    return str(s).lower() in ['true', '1', 't', 'y', 'yes', 'on']

wetter/views.py

@@ -2,7 +2,7 @@
 
 from wetter import app, excel
 from wetter.models import Stations, Climate
-from wetter.utils import fromisoformat, toisoformat
+from wetter.utils import fromisoformat, toisoformat, strtobool
 from flask import request, make_response, render_template, redirect, jsonify
 from datetime import datetime
 from urllib.parse import urlencode
@@ -29,28 +29,38 @@ def station(dwd_id):
 
 @app.route('/station/<dwd_id>/export/')
 def export(dwd_id):
+    today = datetime.today().date().isoformat()
+
     fr = toisoformat(request.args.get('from'))
     to = toisoformat(request.args.get('to'))
     e = request.args.get('e')
 
+    if fr and to and not fr <= to:
+        fr, to = "", ""
+
     station = Stations.query.filter_by(dwd_id=dwd_id).first_or_404()
 
-    return render_template('export.html', e=e, station=station, fr=fr, to=to)
+    return render_template('export.html', e=e, station=station, today=today, fr=fr, to=to)
 
 @app.route('/station/<dwd_id>/export/target/')
 def export_target(dwd_id):
     fr = toisoformat(request.args.get('from'))
     to = toisoformat(request.args.get('to'))
+    workdays_only = strtobool(request.args.get('workdays-only'))
 
-    if fr and to:
+    if fr and to and fr <= to:
         station = Stations.query.filter_by(dwd_id=dwd_id).first_or_404()
 
-        return render_template('target.html', station=station, fr=fr, to=to)
+        return render_template('target.html', station=station, fr=fr, to=to, workdays_only=workdays_only)
 
     else:
-        qs = {
-            "e": "empty",
-        }
+        qs = {}
+
+        if not fr <= to:
+            qs["e"] = "end-before-start"
+
+        else:
+            qs["e"] =  "empty"
 
             if fr:
                 qs["from"] = fr