1 files changed, 51 insertions, 0 deletions
diff --git a/admin/update-index.py b/admin/update-index.py
new file mode 100755
index 0000000..5946433
--- /dev/null
+++ b/admin/update-index.py
@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+
+from datetime import datetime
+from sys import argv
+
+from helpers import (
+    guess_language,
+    read_concerts,
+    split_concerts,
+    tmplocale,
+)
+
+
+CALENDAR_LAYOUT = {
+    'en': '<span id="month">%B</span><br><span id="day">%d</span>',
+    'fr': '<span id="day">%d</span><br><span id="month">%B</span>',
+}
+
+INDEX_TEMPLATE = '''\
+<main>
+    <a id="next-concert" href="concerts.html#concert-%F">
+      <p>
+        {CALENDAR}
+      </p>
+    </a>
+</main>
+'''
+
+
+def main(concerts_src, index_dst):
+    today = datetime.fromordinal(
+        datetime.today().date().toordinal()
+    )
+    past_concerts, next_concerts = split_concerts(
+        read_concerts(concerts_src), today
+    )
+
+    concert = next_concerts[0] if next_concerts else past_concerts[-1]
+
+    lang = guess_language(concerts_src)
+    template = INDEX_TEMPLATE.format(CALENDAR=CALENDAR_LAYOUT[lang])
+
+    with tmplocale(lang):
+        index = concert.time.strftime(template)
+
+    with open(index_dst, 'w') as index_file:
+        index_file.write(index)
+
+
+if __name__ == '__main__':
+    main(*argv[1:])