search and replace

analytics.py

@@ -5,6 +5,7 @@ import geoip2.database
 from auth import require_secret
 from collections import defaultdict
 import pandas as pd
+from typing import Optional, List, Tuple
 import json
 import os
 import auth
@@ -701,9 +702,76 @@ def export_to_excel():
     # Close the cursor and database connection
     cursor.close()
 
+def search_and_replace_rel_path(
+    search: str,
+    replacement: str,
+    dry_run: bool = True,
+    limit_preview: int = 10
+) -> Optional[List[Tuple[str, str]]]:
+    """
+    Find all rel_path values containing `search`.
+    In dry_run mode:
+      - show up to `limit_preview` example renames
+      - show total count
+      - prompt you to apply them (yes/no)
+    If you answer yes (or if dry_run=False), performs the UPDATE.
+
+    Returns the list of (old_path, new_path) that were applied (or would be applied).
+    """
+    
+    cursor = log_db.cursor()
+    like_pattern = f'%{search}%'
+
+    # 1) Fetch matching rows
+    cursor.execute(
+        "SELECT id, rel_path FROM file_access_log WHERE rel_path LIKE ?;",
+        (like_pattern,)
+    )
+    rows = cursor.fetchall()  # List of (id, old_path)
+    total = len(rows)
+
+    if total == 0:
+        print("No matching rel_path entries found.")
+        return []
+
+    # Build all renames
+    renames = [(old, old.replace(search, replacement)) for (_id, old) in rows]
+
+    # In dry_run: preview
+    if dry_run:
+        print(f"\nShowing up to {limit_preview} of {total} pending renames:\n")
+        for old, new in renames[:limit_preview]:
+            print(f"  {old!r}  →  {new!r}")
+        if total > limit_preview:
+            print(f"  ...and {total - limit_preview} more\n")
+        print(f"Total: {total} renaming action(s) would be applied.\n")
+
+        ans = input("Apply these changes? (yes/no): ").strip().lower()
+        if ans in ('y', 'yes'):
+            # Switch to actual update
+            return search_and_replace_rel_path(search, replacement, dry_run=False)
+        else:
+            print("Aborted; no changes made.")
+            return renames
+
+    # If not dry_run, apply the UPDATE once
+    cursor.execute(
+        """
+        UPDATE file_access_log
+           SET rel_path = replace(rel_path, ?, ?)
+         WHERE rel_path LIKE ?;
+        """,
+        (search, replacement, like_pattern)
+    )
+    log_db.commit()
+    updated = cursor.rowcount
+    print(f"Done: {updated} row(s) updated.")
+    return renames
+
 if __name__ == "__main__":
-    print("Running as a standalone script.")
+    # Example usage: dry run first
-    export_to_excel()
+    search_and_replace_rel_path(
-    print("Exported search_db to search_db.xlsx")
+        search="2025-06-13 Freitag 16 Uhr",
-    
+        replacement="2025-06-13 Eröffnungsgottesdienst Freitag 16 Uhr",
-    
+        dry_run=True
+    )