Create re-convert_guillemets.py

plugins/re-convert/re-convert.py

@@ -0,0 +1,98 @@
+# -*- coding: utf-8 -*-
+
+# Re-converts '«' and '»' (plugin for MusicBrainz Picard)
+# Copyright (C) 2019  Nero A.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+
+PLUGIN_NAME = "re-convert"
+PLUGIN_AUTHOR = "Nero A."
+PLUGIN_DESCRIPTION = '''Re-converts \'«\' and \'»\'.
+The plugin is called "re-convert", because it's aim is to convert back characters/strings (to
+Unicode), after the internal converting from Unicode punctuation characters to ASCII in Picard.'''
+PLUGIN_VERSION = "0.1"
+PLUGIN_API_VERSIONS = ["2.0", "2.1", "2.2"]
+PLUGIN_LICENSE = "GPL-3.0-or-later"
+PLUGIN_LICENSE_URL = "https://gnu.org/licenses/gpl.html"
+
+
+# Converts characters/strings by other characters/string.
+#
+# The plugin is called "re-convert", because it's aim is to convert back characters/strings (to
+# Unicode), after the internal converting from Unicode punctuation characters to ASCII in Picard.
+# In concreto it will be used to re-convert "<<" (double less-than) and ">>" (double greater-than)
+# to "«" and "»" (guillemets, see https://en.wikipedia.org/wiki/Guillemet).
+# N.B. Currently only double guillemets will be re-converted but the plugin may be used for any
+# characters/strings and might be extended in future.
+# The converting will be done just straight forward, replace characters/strings by other
+# characters/string, without any further logic. This means there might also be "wrong" re-converts.
+#
+# The internal Unicode punctuation to ASCII converting in Picard converts several characters,
+# including double guillemets to double greater-than/less-than signs.
+# Since I'd like to keep double guillemets I will convert them back with this plugin.
+#
+#
+# See TAGS_ALBUM and TAGS_TRACK for affected metadata tags.
+
+
+from picard.metadata import register_album_metadata_processor
+from picard.metadata import register_track_metadata_processor
+
+
+REPLACE_TABLE = {
+    # Punctuation: (double) guillemets
+    "<<": "«",
+    ">>": "»",
+}
+
+TAGS_ALBUM = [
+    "album",
+    "albumartist",
+    "albumartistsort",
+    "discsubtitle",
+    "originalalbum",
+    "originalartist",
+]
+
+TAGS_TRACK = [
+    "title",
+    "artist",
+    "artists",
+    "artistsort",
+]
+
+
+def reconvert(value):
+    result = value
+    for key in REPLACE_TABLE:
+        result = result.replace(key, REPLACE_TABLE[key])
+
+    return result
+
+
+def process_album(tagger, metadata, release):
+    for name, value in metadata.rawitems():
+        if name in TAGS_ALBUM:
+            metadata[name] = [reconvert(v) for v in value]
+
+
+def process_tracks(tagger, metadata, track, release):
+    for name, value in metadata.rawitems():
+        if name in TAGS_TRACK:
+            metadata[name] = [reconvert(v) for v in value]
+
+
+metadata.register_album_metadata_processor(process_album)
+metadata.register_track_metadata_processor(process_tracks)