1 files changed, 15 insertions, 0 deletions
diff --git a/visitors.php b/visitors.php
index 47992d0..b93a67b 100644
--- a/visitors.php
+++ b/visitors.php
@@ -70,6 +70,8 @@ $config['use_path_info'] = false;
 // *.jsonl - use newline-delimited JSON objects (jsonlines)
 // *.csv - use CSV
 // *.db, *.sqlite, *.sqlite3 - use Sqlite3
+//
+// If the file extension is unknown, CSV is picked as default.
 
 $config['db'] = 'visitors.csv';
 
@@ -228,3 +230,16 @@ final class SqliteDatabase extends Database {
     return true;
   }
 }
+
+function get_database_for_file(string $file): Database {
+  $ext = preg_replace('/.+\.([^.]+)$/', '${1}', $file);
+  return match ($ext) {
+    'db', 'sqlite', 'sqlite3' => new SqliteDatabase($file),
+    'csv' => new CsvDatabase($file),
+    'json' => new JsonDatabase($file),
+    'jsonl' => new JsonlDatabase($file),
+
+    default => new CsvDatabase($file)
+  };
+}
+