Another Step in the Quest to clean up the code base.

src/mahjong_ranking/management/commands/export_ranking.py

@@ -0,0 +1,42 @@
+"""Export Mahjong Rankings as excel files."""
+
+from operator import itemgetter
+
+from django.core.management.base import BaseCommand
+from openpyxl import Workbook
+
+from mahjong_ranking.models import SeasonRanking
+
+
+def geneate_seasonexcel(json_data):
+    """Generate an excel .xlsx spreadsheet from json data of the kyu/dan
+    rankings.
+
+    :param json_data: The ladder ranking as JSON export."""
+    workbook = Workbook()
+    worksheet = workbook.active
+
+    worksheet.append([
+        'Rang', 'Spitzname',
+        '⌀ Platz', '⌀ Punkte',
+        'Hanchans', 'Gut', 'Gewonnen'
+    ])
+
+    json_data = sorted(json_data, key=itemgetter('placement'))
+    for row in json_data:
+        worksheet.append([
+            row['placement'], row['username'],
+            row['avg_placement'], row['avg_score'],
+            row['hanchan_count'],
+            row['good_hanchans'], row['won_hanchans']
+        ])
+    workbook.save("sample.xlsx")
+
+
+class Command(BaseCommand):
+    """Exports the SeasonRankings"""
+
+    def handle(self, *args, **options):
+        """Exports the current ladder ranking in a spreadsheet.
+        This is useful as a backup in form of a hardcopy."""
+        geneate_seasonexcel(SeasonRanking.objects.json_data())