some changes

src/api.vala

@@ -19,7 +19,7 @@
  */
 
 errordomain SubsonicError {
-    FAILED
+  ERROR
 }
 
 public class Wavelet.Artist : Object, Json.Serializable {
@@ -107,6 +107,45 @@ public class Wavelet.Song : Object {
     }
 }
 
+public struct Wavelet.API.PlayQueue {
+    public string current;
+    public int64 position;
+    public DateTime changed;
+    public string changed_by;
+    public ListStore songs;
+
+    internal PlayQueue.from_reader (Json.Reader reader) {
+        reader.read_member ("current");
+        this.current = reader.get_string_value ();
+        reader.end_member ();
+
+        reader.read_member ("position");
+        this.position = reader.get_int_value ();
+        reader.end_member ();
+
+        reader.read_member ("changed");
+        this.changed = new DateTime.from_iso8601 (reader.get_string_value (), null);
+        reader.end_member ();
+
+        reader.read_member ("changed_by");
+        this.changed_by = reader.get_string_value ();
+        reader.end_member ();
+
+        print("%s %lli %s %s\n",this.current, this.position, this.changed, this.changed_by);
+
+        this.songs = new ListStore (typeof (Song));
+
+        reader.read_member ("song");
+        for (int i = 0; i < reader.count_elements (); i += 1) {
+            reader.read_element (i);
+            this.songs.append (new Song (reader));
+            reader.end_element ();
+        }
+        reader.end_member ();
+        assert (reader.get_error () == null);
+    }
+}
+
 public class Wavelet.Subsonic : Object {
     public ListStore artist_list;
     public ListStore album_list;
@@ -146,7 +185,7 @@ public class Wavelet.Subsonic : Object {
                 reader.end_member ();
                 reader.read_member ("error");
                 reader.read_member ("message");
-                throw new SubsonicError.FAILED (reader.get_string_value () ?? "???");
+                throw new SubsonicError.ERROR (reader.get_string_value () ?? "???");
             }
         reader.end_member();
     }

src/meson.build

@@ -3,6 +3,7 @@ wavelet_sources = [
   'application.vala',
   'artist_list.vala',
   'main.vala',
+  'play_queue.vala',
   'setup.vala',
   'song_list.vala',
   'window.vala',

src/play_queue.ui

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <requires lib="Adw" version="1.0"/>
+  <template class="WaveletPlayQueue" parent="AdwNavigationPage">
+    <property name="title" translatable="true">Play queue</property>
+    <child>
+      <object class="AdwToolbarView">
+        <child type="top">
+          <object class="AdwHeaderBar"></object>
+        </child>
+        <child>
+          <object class="GtkScrolledWindow">
+            <child>
+              <object class="GtkListView" id="list_view">
+                <style><class name="view"/></style>
+                <property name="factory">
+                  <object class="GtkBuilderListItemFactory">
+                    <property name="resource">/eu/callcc/Wavelet/play_queue_song.ui</property>
+                  </object>
+                </property>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </child>
+  </template>
+</interface>

src/play_queue.vala

@@ -0,0 +1,41 @@
+/* play_queue.vala
+ *
+ * Copyright 2024 Erica Z
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+[GtkTemplate (ui = "/eu/callcc/Wavelet/play_queue.ui")]
+public class Wavelet.PlayQueue : Adw.NavigationPage {
+    [GtkChild] private unowned Gtk.ListView list_view;
+
+    private ListStore songs;
+    private uint current;
+
+    construct {
+        this.songs = new ListStore (typeof (Song));
+        this.list_view.model = new Gtk.NoSelection (this.songs);
+    }
+
+    public void clear () {
+        this.songs.remove_all ();
+        this.current = 0;
+    }
+
+    public void queue (Song song) {
+        this.songs.append (song);
+    }
+}

src/play_queue_song.ui

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <requires lib="Adw" version="1.0"/>
+  <template class="GtkListItem">
+    <property name="child">
+      <object class="GtkLabel">
+        <property name="halign">start</property>
+        <binding name="label">
+          <lookup type="WaveletSong" name="name">
+            <lookup name="item">GtkListItem</lookup>
+          </lookup>
+        </binding>
+      </object>
+    </property>
+  </template>
+</interface>

src/wavelet.gresource.xml

@@ -4,6 +4,8 @@
     <file preprocess="xml-stripblanks">artist_list.ui</file>
     <file preprocess="xml-stripblanks">artist_list_artist.ui</file>
     <file preprocess="xml-stripblanks">gtk/help-overlay.ui</file>
+    <file preprocess="xml-stripblanks">play_queue.ui</file>
+    <file preprocess="xml-stripblanks">play_queue_song.ui</file>
     <file preprocess="xml-stripblanks">setup.ui</file>
     <file preprocess="xml-stripblanks">song_list.ui</file>
     <file preprocess="xml-stripblanks">song_list_song.ui</file>

src/window.ui

@@ -8,9 +8,11 @@
     <property name="default-width">800</property>
     <property name="default-height">600</property>
     <property name="content">
-      <object class="AdwToolbarView">
+      <object class="GtkBox">
+        <property name="orientation">vertical</property>
         <child>
           <object class="AdwOverlaySplitView">
+            <property name="vexpand">true</property>
             <child type="sidebar">
               <object class="AdwNavigationPage">
                 <property name="width-request">100</property>
@@ -18,13 +20,57 @@
                 <child>
                   <object class="AdwToolbarView">
                     <child type="top">
-                      <object class="AdwHeaderBar"></object>
+                      <object class="AdwHeaderBar">
-                    </child>
-                    <child>
-                      <object class="GtkStackSidebar">
-                        <property name="stack">stack</property>
                       </object>
                     </child>
+                    <property name="content">
+                      <object class="GtkBox">
+                        <property name="orientation">vertical</property>
+                        <child>
+                          <object class="GtkListBox" id="sidebar">
+                            <style><class name="navigation-sidebar"/></style>
+                            <child>
+                              <object class="GtkListBoxRow" id="sidebar_setup">
+                                <child>
+                                  <object class="GtkLabel">
+                                    <property name="xalign">0</property>
+                                    <property name="label">Setup</property>
+                                  </object>
+                                </child>
+                              </object>
+                            </child>
+                            <child>
+                              <object class="GtkListBoxRow" id="sidebar_play_queue">
+                                <child>
+                                  <object class="GtkLabel">
+                                    <property name="xalign">0</property>
+                                    <property name="label">Play queue</property>
+                                  </object>
+                                </child>
+                              </object>
+                            </child>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkSeparator">
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkListBox">
+                            <property name="selection-mode">none</property>
+                            <style><class name="navigation-sidebar"/></style>
+                            <child>
+                              <object class="AdwButtonRow">
+                                <property name="title">Shuffle all tracks</property>
+                                <property name="start-icon-name">media-playlist-shuffle</property>
+                              </object>
+                            </child>
+                          </object>
+                        </child>
+                        <child>
+                        </child>
+                      </object>
+                    </property>
                   </object>
                 </child>
               </object>
@@ -58,6 +104,15 @@
                     </property>
                   </object>
                 </child>
+                <child>
+                  <object class="GtkStackPage">
+                    <property name="name">play_queue</property>
+                    <property name="title">Play queue</property>
+                    <property name="child">
+                      <object class="WaveletPlayQueue" id="play_queue"/>
+                    </property>
+                  </object>
+                </child>
               </object>
             </child>
           </object>

src/window.vala

@@ -20,11 +20,29 @@
 
 [GtkTemplate (ui = "/eu/callcc/Wavelet/window.ui")]
 public class Wavelet.Window : Adw.ApplicationWindow {
+    [GtkChild] private unowned Gtk.ListBox sidebar;
+    [GtkChild] private unowned Gtk.ListBoxRow sidebar_setup;
+    [GtkChild] private unowned Gtk.ListBoxRow sidebar_play_queue;
+    [GtkChild] private unowned Gtk.Stack stack;
+
     [GtkChild] public unowned Wavelet.Setup setup;
     [GtkChild] public unowned Wavelet.ArtistList artist_list;
     [GtkChild] public unowned Wavelet.SongList song_list;
+    [GtkChild] public unowned Wavelet.PlayQueue play_queue;
 
     public Window (Gtk.Application app) {
         Object (application: app);
     }
+
+    construct {
+        this.sidebar.row_activated.connect ((row) => {
+            if (row == this.sidebar_setup) {
+                this.stack.set_visible_child_name("setup");
+            } else if (row == this.sidebar_play_queue) {
+                this.stack.set_visible_child_name("play_queue");
+            }
+        });
+
+        this.sidebar.select_row (this.sidebar.get_row_at_index (0));
+    }
 }