use python script to load khal events

Scripts/python/src/calendar/khal-events.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+import json
+import os
+import re
+import subprocess
+import sys
+from datetime import datetime
+from pathlib import Path
+
+def get_khal_date_format():
+    """Read the khal config and extract the longdatetimeformat."""
+    xdg_config = os.environ.get('XDG_CONFIG_HOME', os.path.expanduser('~/.config'))
+    config_path = Path(xdg_config) / 'khal' / 'config'
+
+    if not config_path.exists():
+        return '%c'
+
+    with open(config_path, 'r') as f:
+        for line in f:
+            if m := re.match(r'^longdatetimeformat\s?=\s?(.+?)\s*$', line):
+                date_format = m.group(1).strip()
+                return date_format
+
+    return '%c'
+
+
+def to_khal(date_str, khal_format):
+    dt = datetime.strptime(date_str, "%Y-%m-%d")
+    return dt.strftime(khal_format)
+
+def from_khal(date_str, khal_format):
+    if not date_str:
+        return ''
+    dt = datetime.strptime(date_str, khal_format)
+    return dt.isoformat()
+
+def convert_event(event, khal_format):
+    event['start-long-full'] = from_khal(event.get('start-long-full', ''), khal_format)
+    event['end-long-full'] = from_khal(event.get('end-long-full', ''), khal_format)
+    return event
+
+def main():
+    start_date = sys.argv[1]
+    duration = sys.argv[2]
+
+    khal_format = get_khal_date_format()
+    khal_start = to_khal(start_date, khal_format)
+
+    cmd = [
+        'khal', 'list',
+        '--json', 'uid',
+        '--json', 'title',
+        '--json', 'start-long-full',
+        '--json', 'end-long-full',
+        '--json', 'calendar',
+        '--json', 'description',
+        '--json', 'location',
+        khal_start,
+        duration
+    ]
+
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    output = result.stdout.strip()
+
+    for line in output.split('\n'):
+        day_events = json.loads(line)
+        print(json.dumps([convert_event(e, khal_format) for e in day_events]))
+
+if __name__ == '__main__':
+    main()