[LM] initial commit

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/material_theme_project_new.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="MaterialThemeProjectNewConfig">
+    <option name="metadata">
+      <MTProjectMetadataState>
+        <option name="migrated" value="true" />
+        <option name="pristineConfig" value="false" />
+        <option name="userId" value="-7041df4:192edc56d40:-7ffa" />
+      </MTProjectMetadataState>
+    </option>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings" defaultProject="true" />
+</project>

participants.csv

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+id,name,household,email,last_match_id
+0,Lukas,Martin,contact@lukasmartin.eu,4
+1,Jan,Martin,Null,3
+2,Ulrike,Martin,Null,5
+3,Petra,Scheib,Null,2
+4,Dietmar,Scheib,Null,1
+5,Lisa,Scheib,Null,8
+6,Andreas,Scheib,Null,0
+7,Annette,Simon,Null,6
+8,Julia,Simon,Null,3
+9,Marc,Simon,Null,6

wichteln_matcher.py

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+import csv
+from random import shuffle
+
+# 1. Load participants from CSV, now including id and last_match_id
+def load_participants(filename):
+    participants = []
+    with open(filename, 'r') as file:
+        reader = csv.DictReader(file)
+        for row in reader:
+            participants.append({
+                'id': int(row['id']),
+                'name': row['name'],
+                'household': row['household'],
+                'email': row['email'],
+                'last_match_id': int(row['last_match_id']) if row['last_match_id'] else None
+            })
+    return participants
+
+# 2. Match participants with conditions, avoiding self-gift and reciprocal matches
+def match_participants(participants):
+    shuffled = participants.copy()
+    shuffle(shuffled)  # Randomize list
+
+    matches = {}
+    for giver in participants:
+        for receiver in shuffled:
+            if giver['id'] != receiver['id'] and \
+                    giver['household'] != receiver['household'] and \
+                    giver['last_match_id'] != receiver['id'] and \
+                    matches.get(receiver['id']) != giver['id']:  # Avoid reciprocal match
+                matches[giver['id']] = receiver
+                shuffled.remove(receiver)
+                break
+    return matches
+
+# 3. Update participants with this year's matches
+def update_last_match_in_file(participants, matches, filename):
+    for giver_id, receiver in matches.items():
+        for participant in participants:
+            if participant['id'] == giver_id:
+                participant['last_match_id'] = receiver['id']
+
+    # Write updated participants back to CSV
+    with open(filename, 'w', newline='') as file:
+        fieldnames = ['id', 'name', 'household', 'email', 'last_match_id']
+        writer = csv.DictWriter(file, fieldnames=fieldnames)
+        writer.writeheader()
+        for participant in participants:
+            writer.writerow({
+                'id': participant['id'],
+                'name': participant['name'],
+                'household': participant['household'],
+                'email': participant['email'],
+                'last_match_id': participant['last_match_id']
+            })
+
+# 4. Main function to run the match and update the file
+def main():
+    participants = load_participants('participants.csv')
+    matches = match_participants(participants)
+
+    # Print and update matches
+    for giver_id, receiver in matches.items():
+        giver = next(p for p in participants if p['id'] == giver_id)
+        print(f"{giver['name']} ({giver['email']}) will give a gift to {receiver['name']} ({receiver['email']})")
+
+    # Update last matches in the CSV file
+    update_last_match_in_file(participants, matches, 'participants.csv')
+    print("Participants file updated with this year's matches.")
+
+if __name__ == '__main__':
+    main()