[gnome-music/wip/jfelder/new-album-design-v3: 5/9] corealbum: Add a release-info property

[Jean Felder <jfelder src gnome org>]

commit d65f047a26658cfd76382dc1d11bc32c60601864
Author: Jean Felder <jfelder src gnome org>
Date:   Sat Nov 21 00:22:57 2020 +0100

    corealbum: Add a release-info property
    
    This contains the publication year and the duration of an album. It
    will be used in the following to port AlbumWidget and
    ArtistAlbumWidget to the new design.

 gnomemusic/corealbum.py | 27 +++++++++++++++++++++++++++
 po/POTFILES.in          |  1 +
 2 files changed, 28 insertions(+)
---
diff --git a/gnomemusic/corealbum.py b/gnomemusic/corealbum.py
index 9ce98772a..a104b740e 100644
--- a/gnomemusic/corealbum.py
+++ b/gnomemusic/corealbum.py
@@ -22,6 +22,11 @@
 # code, but you are not obligated to do so.  If you do not wish to do so,
 # delete this exception statement from your version.
 
+from __future__ import annotations
+
+from gettext import ngettext
+from typing import Optional
+
 import gi
 gi.require_versions({"Gfm": "0.1", "Grl": "0.3"})
 from gi.repository import Gfm, Gio, Grl, GObject
@@ -54,9 +59,12 @@ class CoreAlbum(GObject.GObject):
         self._application = application
         self._coregrilo = application.props.coregrilo
         self._model = None
+        self._release_info = ""
         self._selected = False
         self._thumbnail = None
 
+        self.connect("notify::year", self._on_release_info_changed)
+
         self.update(media)
 
     def update(self, media):
@@ -114,6 +122,7 @@ class CoreAlbum(GObject.GObject):
             duration += coredisc.props.duration
 
         self.props.duration = duration
+        self._on_release_info_changed(self, None)
 
     @GObject.Property(type=bool, default=False)
     def selected(self):
@@ -153,3 +162,21 @@ class CoreAlbum(GObject.GObject):
         :param string value: uri or "generic"
         """
         self._thumbnail = value
+
+    def _on_release_info_changed(
+            self, klass: CoreAlbum,
+            value: Optional[GObject.ParamSpecString]) -> None:
+        mins = (self.props.duration // 60) + 1
+        year = self.props.year
+        self._release_info = ngettext(
+            "{}, {} minute", "{}, {} minutes", mins).format(year, mins)
+        self.notify("release-info")
+
+    @GObject.Property(type=str, default="", flags=GObject.ParamFlags.READABLE)
+    def release_info(self) -> str:
+        """Get release info (year and duration) as string
+
+        :return: The release info
+        :rtype: str
+        """
+        return self._release_info
diff --git a/po/POTFILES.in b/po/POTFILES.in
index c88c5b2cc..50b80c21a 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -21,6 +21,7 @@ data/ui/SelectionBarMenuButton.ui
 data/ui/SelectionToolbar.ui
 gnomemusic/__init__.py
 gnomemusic/application.py
+gnomemusic/corealbum.py
 gnomemusic/grilowrappers/grltrackerplaylists.py
 gnomemusic/gstplayer.py
 gnomemusic/inhibitsuspend.py