fix Last-Modified mtime overwriting post processor mtime (#7529)

https://github.com/mikf/gallery-dl/issues/7529#issuecomment-2989955455

- split '_mtime' into '_mtime_http' and '_mtime_meta'
- add PathFormat.set_mtime() method

gallery_dl/downloader/http.py

@@ -349,11 +349,11 @@ class HttpDownloader(DownloaderBase):
         self.downloading = False
         if self.mtime:
             if "_http_lastmodified" in kwdict:
-                kwdict["_mtime"] = kwdict["_http_lastmodified"]
+                kwdict["_mtime_http"] = kwdict["_http_lastmodified"]
             else:
-                kwdict["_mtime"] = response.headers.get("Last-Modified")
+                kwdict["_mtime_http"] = response.headers.get("Last-Modified")
         else:
-            kwdict["_mtime"] = None
+            kwdict["_mtime_http"] = None
 
         return True
 

gallery_dl/path.py

@@ -348,6 +348,11 @@ class PathFormat():
             pass
         return 0
 
+    def set_mtime(self, path=None):
+        if (mtime := (self.kwdict.get("_mtime_meta") or
+                      self.kwdict.get("_mtime_http"))):
+            util.set_mtime(self.realpath if path is None else path, mtime)
+
     def finalize(self):
         """Move tempfile to its target location"""
         if self.delete:
@@ -381,6 +386,4 @@ class PathFormat():
                     os.unlink(self.temppath)
                 break
 
-        mtime = self.kwdict.get("_mtime")
-        if mtime:
-            util.set_mtime(self.realpath, mtime)
+        self.set_mtime()

gallery_dl/postprocessor/metadata.py

@@ -139,9 +139,7 @@ class MetadataPP(PostProcessor):
             archive.add(pathfmt.kwdict)
 
         if self.mtime:
-            mtime = pathfmt.kwdict.get("_mtime")
-            if mtime:
-                util.set_mtime(path, mtime)
+            pathfmt.set_mtime(path)
 
     def _run_stdout(self, pathfmt):
         self.write(sys.stdout, pathfmt.kwdict)

gallery_dl/postprocessor/mtime.py

@@ -36,7 +36,7 @@ class MtimePP(PostProcessor):
         if mtime is None:
             return
 
-        pathfmt.kwdict["_mtime"] = (
+        pathfmt.kwdict["_mtime_meta"] = (
             util.datetime_to_timestamp(mtime)
             if isinstance(mtime, datetime) else
             text.parse_int(mtime)

gallery_dl/postprocessor/ugoira.py

@@ -236,9 +236,7 @@ class UgoiraPP(PostProcessor):
             pathfmt.realpath = pathfmt.temppath
         else:
             if self.mtime:
-                mtime = pathfmt.kwdict.get("_mtime")
-                if mtime:
-                    util.set_mtime(pathfmt.realpath, mtime)
+                pathfmt.set_mtime()
             return True
 
     def convert_to_archive(self, pathfmt, tempdir):