1 files changed, 91 insertions, 0 deletions
diff --git a/gallery_dl/postprocessor/rename.py b/gallery_dl/postprocessor/rename.py
new file mode 100644
index 0000000..f71738d
--- /dev/null
+++ b/gallery_dl/postprocessor/rename.py
@@ -0,0 +1,91 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2024 Mike Fährmann
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+"""Rename files"""
+
+from .common import PostProcessor
+from .. import formatter
+import os
+
+
+class RenamePP(PostProcessor):
+
+    def __init__(self, job, options):
+        PostProcessor.__init__(self, job)
+
+        self.skip = options.get("skip", True)
+        old = options.get("from")
+        new = options.get("to")
+
+        if old:
+            self._old = self._apply_format(old)
+            self._new = (self._apply_format(new) if new else
+                         self._apply_pathfmt)
+            job.register_hooks({
+                "prepare": self.rename_from,
+            }, options)
+
+        elif new:
+            self._old = self._apply_pathfmt
+            self._new = self._apply_format(new)
+            job.register_hooks({
+                "skip"         : self.rename_to_skip,
+                "prepare-after": self.rename_to_pafter,
+            }, options)
+
+        else:
+            raise ValueError("Option 'from' or 'to' is required")
+
+    def rename_from(self, pathfmt):
+        name_old = self._old(pathfmt)
+        path_old = pathfmt.realdirectory + name_old
+
+        if os.path.exists(path_old):
+            name_new = self._new(pathfmt)
+            path_new = pathfmt.realdirectory + name_new
+            self._rename(path_old, name_old, path_new, name_new)
+
+    def rename_to_skip(self, pathfmt):
+        name_old = self._old(pathfmt)
+        path_old = pathfmt.realdirectory + name_old
+
+        if os.path.exists(path_old):
+            pathfmt.filename = name_new = self._new(pathfmt)
+            pathfmt.path = pathfmt.directory + name_new
+            pathfmt.realpath = path_new = pathfmt.realdirectory + name_new
+            self._rename(path_old, name_old, path_new, name_new)
+
+    def rename_to_pafter(self, pathfmt):
+        pathfmt.filename = name_new = self._new(pathfmt)
+        pathfmt.path = pathfmt.directory + name_new
+        pathfmt.realpath = pathfmt.realdirectory + name_new
+        pathfmt.kwdict["_file_recheck"] = True
+
+    def _rename(self, path_old, name_old, path_new, name_new):
+        if self.skip and os.path.exists(path_new):
+            return self.log.warning(
+                "Not renaming '%s' to '%s' since another file with the "
+                "same name exists", name_old, name_new)
+
+        self.log.info("'%s' -> '%s'", name_old, name_new)
+        os.replace(path_old, path_new)
+
+    def _apply_pathfmt(self, pathfmt):
+        return pathfmt.build_filename(pathfmt.kwdict)
+
+    def _apply_format(self, format_string):
+        fmt = formatter.parse(format_string).format_map
+
+        def apply(pathfmt):
+            return pathfmt.clean_path(pathfmt.clean_segment(fmt(
+                pathfmt.kwdict)))
+
+        return apply
+
+
+__postprocessor__ = RenamePP