Added a setting where the exported excel files should be stored.

Added a option to send the exported excel as mail attachment.

src/mahjong_ranking/management/commands/export_ranking.py

@@ -1,11 +1,15 @@
 """Export Mahjong Rankings as excel files."""
 
-import openpyxl
-from django.core.management.base import BaseCommand
-from django.utils.dateparse import parse_date
-from openpyxl.styles import Border
+import os
 from datetime import date, time, datetime
+
+import openpyxl
+from django.conf import settings
+from django.core.management.base import BaseCommand
 from django.utils import timezone
+from django.utils.dateparse import parse_date
+from django.core.mail import EmailMessage
+
 from mahjong_ranking.models import SeasonRanking, KyuDanRanking
 
 THIN_BORDER = openpyxl.styles.Side(style='thin', color="d3d7cf")
@@ -38,7 +42,19 @@ DATE_STYLE.font = DEFAULT_STYLE.font
 DATE_STYLE.border = DEFAULT_STYLE.border
 DATE_STYLE.number_format = 'dd.mm.yyyy'
 
+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 geneate_excel():
     """Generate an excel .xlsx spreadsheet from json data of the kyu/dan
     rankings.
@@ -108,7 +124,7 @@ def export_season_rankings(workbook, until):
          'style': 'content',
          'width': 25},
         {'col': 'C', 'title': '⌀ Platz', 'attr': 'avg_placement',
-         'style': 'int', 'width': 8},
+         'style': 'float', 'width': 8},
         {'col': 'D', 'title': '⌀ Punkte', 'attr': 'avg_score',
          'style': 'float', 'width': 12},
         {'col': 'E', 'title': 'Hanchans', 'attr': 'hanchan_count',
@@ -156,17 +172,43 @@ def export_kyu_dan_rankings(workbook, until):
 
 class Command(BaseCommand):
     """Exports the SeasonRankings"""
+    filename = str()
+    until = datetime
 
     def add_arguments(self, parser):
-        parser.add_argument('--until', nargs='?', type=parse_date)
+        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."""
-        until = timezone.make_aware(
-            datetime.combine(options['until'] or date.today(),
-                             time(23, 59, 59)))
+        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 = geneate_excel()
-        export_season_rankings(workbook, until=until)
-        export_kyu_dan_rankings(workbook, until=until)
-        workbook.save('mahjong_rankings_{:%Y-%m-%d}.xlsx'.format(until))
+        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()
+