XLSX Export vereinheitlicht.

Spieler Hanchanlisten können nun als XLSX exportiert werden.
Anpassungen in den Einstellungen für die parametisierten Kyu/Dan Berechnung.

src/mahjong_ranking/management/commands/exportranking.py

@@ -0,0 +1,126 @@
+"""Export Mahjong Rankings as excel files."""
+
+import os
+from datetime import date, time, datetime
+
+from django.conf import settings
+from django.core.mail import EmailMessage
+from django.core.management.base import BaseCommand
+from django.utils import timezone
+from django.utils.dateparse import parse_date
+
+from kasu import xlsx
+from mahjong_ranking.models import SeasonRanking, KyuDanRanking
+
+MAIL_BODY = """
+Hallo! Ich bin's dein Server.
+ 
+Ich habe gerade die Mahjong Rankings als Excel exportiert und dachte mir das
+ich sie dir am besten gleich schicke.
+
+Bitte versuche nicht auf diese E-Mail zu antworten. 
+Ich bin nur ein dummes Programm.
+
+mit lieben Grüßen
+
+Der Kasu Server
+"""
+
+
+def export_season_rankings(workbook, until):
+    SeasonRanking.objects.update(until=until)
+    season = until.year if until else date.today().year
+    object_list = SeasonRanking.objects.season_rankings()
+    title = "Mahjong Ladder - {}".format(season)
+    columns_settings = (
+        {'col': 'A', 'title': 'Rang', 'attr': 'placement', 'style': 'Integer',
+         'width': 8},
+        {'col': 'B', 'title': 'Spitzname', 'attr': 'user.username',
+         'style': 'Content',
+         'width': 25},
+        {'col': 'C', 'title': '⌀ Platz', 'attr': 'avg_placement',
+         'style': 'Float', 'width': 8},
+        {'col': 'D', 'title': '⌀ Punkte', 'attr': 'avg_score',
+         'style': 'Float', 'width': 12},
+        {'col': 'E', 'title': 'Hanchans', 'attr': 'hanchan_count',
+         'style': 'Integer', 'width': 10},
+        {'col': 'F', 'title': 'Gut', 'attr': 'good_hanchans',
+         'style': 'Integer', 'width': 5},
+        {'col': 'G', 'title': 'Gewonnen', 'attr': 'won_hanchans',
+         'style': 'Integer', 'width': 10},
+    )
+    workbook.generate_sheet(
+        title=title,
+        columns_settings=columns_settings,
+        object_list=object_list)
+
+
+def export_kyu_dan_rankings(workbook, until):
+    KyuDanRanking.objects.update(until=until)
+    object_list = KyuDanRanking.objects.all()
+    title = "Kyū & Dan Rankings"
+    columns_settings = (
+        {'col': 'A', 'title': 'Spitzname', 'attr': 'user.username',
+         'style': 'Content', 'width': 14},
+        {'col': 'B', 'title': 'Voller Name', 'attr': 'user.full_name',
+         'style': 'Content', 'width': 20},
+        {'col': 'C', 'title': 'Rang', 'attr': 'rank',
+         'style': 'Content', 'width': 8},
+        {'col': 'D', 'title': 'Punkte', 'attr': 'points',
+         'style': 'Integer', 'width': 8},
+        {'col': 'E', 'title': 'Hanchans', 'attr': 'hanchan_count',
+         'style': 'Integer', 'width': 10},
+        {'col': 'F', 'title': 'Gut', 'attr': 'good_hanchans',
+         'style': 'Integer', 'width': 5},
+        {'col': 'G', 'title': 'Gewonnen', 'attr': 'won_hanchans',
+         'style': 'Integer', 'width': 10},
+        {'col': 'H', 'title': 'letzte Hanchan', 'attr': 'last_hanchan_date',
+         'style': 'Date', 'width': 16},
+    )
+    workbook.generate_sheet(
+        title=title,
+        columns_settings=columns_settings,
+        object_list=object_list)
+
+
+class Command(BaseCommand):
+    """Exports the SeasonRankings"""
+    filename = str()
+    until = datetime
+
+    def add_arguments(self, parser):
+        parser.add_argument(
+            '--until', nargs='?', type=parse_date,
+            default=date.today(), metavar='YYYY-MM-DD',
+            help='Calculate and export rankings until the given date.')
+        parser.add_argument(
+            '--mail', nargs='*', type=str, metavar='user@example.com',
+            help='Send the spreadsheet via eMail to the given recipient.')
+
+    def handle(self, *args, **options):
+        """Exports the current ladder ranking in a spreadsheet.
+        This is useful as a backup in form of a hardcopy."""
+        self.until = timezone.make_aware(datetime.combine(
+            options['until'], time(23, 59, 59)
+        ))
+
+        self.filename = os.path.join(
+            settings.RANKING_EXPORT_PATH,
+            'mahjong_rankings_{:%Y-%m-%d}.xlsx'.format(self.until)
+        )
+        workbook = xlsx.Workbook()
+        export_season_rankings(workbook, until=self.until)
+        export_kyu_dan_rankings(workbook, until=self.until)
+        os.makedirs(settings.RANKING_EXPORT_PATH, exist_ok=True)
+        workbook.save(self.filename)
+        if options['mail']:
+            self.send_mail(options['mail'])
+
+    def send_mail(self, recipients):
+        mail = EmailMessage(
+            subject='Mahjong Rankings vom {:%d.%m.%Y}'.format(self.until),
+            body=MAIL_BODY,
+            from_email=settings.DEFAULT_FROM_EMAIL,
+            to=recipients)
+        mail.attach_file(self.filename)
+        mail.send()