support 'filter' option for post processors (#1460)

gallery_dl/postprocessor/classify.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2018-2020 Mike Fährmann
+# Copyright 2018-2021 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
@@ -31,9 +31,8 @@ class ClassifyPP(PostProcessor):
             for directory, exts in mapping.items()
             for ext in exts
         }
-
-        job.hooks["prepare"].append(self.prepare)
-        job.hooks["file"].append(self.move)
+        job.register_hooks(
+            {"prepare": self.prepare, "file": self.move}, options)
 
     def prepare(self, pathfmt):
         ext = pathfmt.extension

gallery_dl/postprocessor/compare.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2020 Mike Fährmann
+# Copyright 2020-2021 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
@@ -18,11 +18,12 @@ class ComparePP(PostProcessor):
         PostProcessor.__init__(self, job)
         if options.get("shallow"):
             self._compare = self._compare_size
-        job.hooks["file"].append(
+
+        job.register_hooks({"file": (
             self.enumerate
             if options.get("action") == "enumerate" else
             self.compare
-        )
+        )}, options)
 
     def compare(self, pathfmt):
         try:

gallery_dl/postprocessor/exec.py

@@ -41,8 +41,7 @@ class ExecPP(PostProcessor):
             events = ("after",)
         elif isinstance(events, str):
             events = events.split(",")
-        for event in events:
-            job.hooks[event].append(execute)
+        job.register_hooks({event: execute for event in events}, options)
 
     def exec_list(self, pathfmt, status=None):
         if status:

gallery_dl/postprocessor/metadata.py

@@ -57,8 +57,7 @@ class MetadataPP(PostProcessor):
             events = ("file",)
         elif isinstance(events, str):
             events = events.split(",")
-        for event in events:
-            job.hooks[event].append(self.run)
+        job.register_hooks({event: self.run for event in events}, options)
 
     def run(self, pathfmt):
         directory = self._directory(pathfmt)

gallery_dl/postprocessor/mtime.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2019-2020 Mike Fährmann
+# Copyright 2019-2021 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
@@ -17,7 +17,7 @@ class MtimePP(PostProcessor):
     def __init__(self, job, options):
         PostProcessor.__init__(self, job)
         self.key = options.get("key", "date")
-        job.hooks["file"].append(self.run)
+        job.register_hooks({"file": self.run}, options)
 
     def run(self, pathfmt):
         mtime = pathfmt.kwdict.get(self.key)

gallery_dl/postprocessor/ugoira.py

@@ -55,8 +55,8 @@ class UgoiraPP(PostProcessor):
         else:
             self.prevent_odd = False
 
-        job.hooks["prepare"].append(self.prepare)
-        job.hooks["file"].append(self.convert)
+        job.register_hooks(
+            {"prepare": self.prepare, "file": self.convert}, options)
 
     def prepare(self, pathfmt):
         self._frames = None

gallery_dl/postprocessor/zip.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2018-2020 Mike Fährmann
+# Copyright 2018-2021 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
@@ -38,9 +38,11 @@ class ZipPP(PostProcessor):
         self.args = (self.path[:-1] + ext, "a",
                      self.COMPRESSION_ALGORITHMS[algorithm], True)
 
-        job.hooks["file"].append(
-            self.write_safe if options.get("mode") == "safe" else self.write)
-        job.hooks["finalize"].append(self.finalize)
+        job.register_hooks({
+            "file":
+            self.write_safe if options.get("mode") == "safe" else self.write,
+            "finalize": self.finalize,
+        }, options)
 
     def write(self, pathfmt, zfile=None):
         # 'NameToInfo' is not officially documented, but it's available