Basic support for random programs

src/home_page.rs

@@ -4,7 +4,6 @@ use crate::{
     editor::{person_editor::MusicusPersonEditor, work_editor::MusicusWorkEditor},
     library::{LibraryQuery, MusicusLibrary},
     player::MusicusPlayer,
-    playlist_item::PlaylistItem,
     program::Program,
     program_tile::MusicusProgramTile,
     recording_tile::MusicusRecordingTile,
@@ -38,6 +37,7 @@ mod imp {
         #[property(get, construct_only)]
         pub player: OnceCell<MusicusPlayer>,
 
+        pub programs: RefCell<Vec<Program>>,
         pub composers: RefCell<Vec<Person>>,
         pub performers: RefCell<Vec<Person>>,
         pub ensembles: RefCell<Vec<Ensemble>>,
@@ -110,18 +110,19 @@ mod imp {
                 .build();
 
             let settings = gio::Settings::new("de.johrpan.musicus");
-            let program1 = Program::deserialize(&settings.string("program1")).unwrap();
-            let program2 = Program::deserialize(&settings.string("program2")).unwrap();
-            let program3 = Program::deserialize(&settings.string("program3")).unwrap();
 
-            self.programs_flow_box
-                .append(&MusicusProgramTile::new(program1));
+            let programs = vec![
+                Program::deserialize(&settings.string("program1")).unwrap(),
+                Program::deserialize(&settings.string("program2")).unwrap(),
+                Program::deserialize(&settings.string("program3")).unwrap(),
+            ];
 
-            self.programs_flow_box
-                .append(&MusicusProgramTile::new(program2));
+            for program in &programs {
+                self.programs_flow_box
+                    .append(&MusicusProgramTile::new(program.to_owned()));
+            }
 
-            self.programs_flow_box
-                .append(&MusicusProgramTile::new(program3));
+            self.programs.replace(programs);
 
             self.obj().query(&LibraryQuery::default());
         }
@@ -179,6 +180,10 @@ impl MusicusHomePage {
     #[template_callback]
     fn play(&self, _: &gtk::Button) {
         log::info!("Play button clicked");
+
+        let program = Program::from_query(self.imp().search_entry.query());
+        self.player().set_program(program);
+
         self.player().play();
     }
 
@@ -187,7 +192,9 @@ impl MusicusHomePage {
         let imp = self.imp();
 
         if imp.programs_flow_box.is_visible() {
-            log::info!("Program selected");
+            if let Some(program) = imp.programs.borrow().first().cloned() {
+                self.player().set_program(program);
+            }
         } else {
             let (composer, performer, ensemble, work, recording, album) = {
                 (
@@ -209,7 +216,7 @@ impl MusicusHomePage {
             } else if let Some(work) = work {
                 search_entry.add_tag(Tag::Work(work));
             } else if let Some(recording) = recording {
-                self.play_recording(&recording);
+                self.player().play_recording(&recording);
             } else if let Some(album) = album {
                 self.show_album(&album);
             }
@@ -218,10 +225,8 @@ impl MusicusHomePage {
 
     #[template_callback]
     fn program_selected(&self, tile: &gtk::FlowBoxChild, _: &gtk::FlowBox) {
-        log::info!(
-            "Program selected: {:?}",
-            tile.downcast_ref::<MusicusProgramTile>().unwrap().program()
-        );
+        self.player()
+            .set_program(tile.downcast_ref::<MusicusProgramTile>().unwrap().program());
     }
 
     #[template_callback]
@@ -233,7 +238,7 @@ impl MusicusHomePage {
 
     #[template_callback]
     fn recording_selected(&self, tile: &gtk::FlowBoxChild, _: &gtk::FlowBox) {
-        self.play_recording(
+        self.player().play_recording(
             tile.downcast_ref::<MusicusRecordingTile>()
                 .unwrap()
                 .recording(),
@@ -245,74 +250,6 @@ impl MusicusHomePage {
         self.show_album(tile.downcast_ref::<MusicusAlbumTile>().unwrap().album());
     }
 
-    fn play_recording(&self, recording: &Recording) {
-        let tracks = &recording.tracks;
-
-        if tracks.is_empty() {
-            log::warn!("Ignoring recording without tracks being added to the playlist.");
-            return;
-        }
-
-        let title = format!(
-            "{}: {}",
-            recording.work.composers_string(),
-            recording.work.name.get(),
-        );
-
-        let performances = recording.performers_string();
-
-        let mut items = Vec::new();
-
-        if tracks.len() == 1 {
-            items.push(PlaylistItem::new(
-                true,
-                &title,
-                Some(&performances),
-                None,
-                &tracks[0].path,
-            ));
-        } else {
-            let mut tracks = tracks.into_iter();
-            let first_track = tracks.next().unwrap();
-
-            let track_title = |track: &Track, number: usize| -> String {
-                let title = track
-                    .works
-                    .iter()
-                    .map(|w| w.name.get().to_string())
-                    .collect::<Vec<String>>()
-                    .join(", ");
-
-                if title.is_empty() {
-                    format!("Track {number}")
-                } else {
-                    title
-                }
-            };
-
-            items.push(PlaylistItem::new(
-                true,
-                &title,
-                Some(&performances),
-                Some(&track_title(&first_track, 1)),
-                &first_track.path,
-            ));
-
-            for (index, track) in tracks.enumerate() {
-                items.push(PlaylistItem::new(
-                    false,
-                    &title,
-                    Some(&performances),
-                    // track number = track index + 1 (first track) + 1 (zero based)
-                    Some(&track_title(&track, index + 2)),
-                    &track.path,
-                ));
-            }
-        }
-
-        self.player().append(items);
-    }
-
     fn show_album(&self, _album: &Album) {
         todo!("Show album");
     }

src/library.rs

@@ -8,7 +8,10 @@ use chrono::prelude::*;
 use diesel::{dsl::exists, prelude::*, QueryDsl, SqliteConnection};
 use gtk::{glib, glib::Properties, prelude::*, subclass::prelude::*};
 
-use crate::db::{self, models::*, schema::*, tables, TranslatedString};
+use crate::{
+    db::{self, models::*, schema::*, tables, TranslatedString},
+    program::Program,
+};
 
 diesel::define_sql_function! {
     /// Represents the SQL RANDOM() function.
@@ -380,19 +383,45 @@ impl MusicusLibrary {
         })
     }
 
-    pub fn random_recording(&self, query: &LibraryQuery) -> Result<Recording> {
+    pub fn generate_recording(&self, program: &Program) -> Result<Recording> {
         let mut binding = self.imp().connection.borrow_mut();
         let connection = &mut *binding.as_mut().unwrap();
 
-        match query {
-            LibraryQuery { .. } => Recording::from_table(
-                recordings::table
-                    .order(random())
-                    .first::<tables::Recording>(connection)?,
-                &self.folder(),
-                connection,
-            ),
+        let mut query = recordings::table
+            .inner_join(works::table.inner_join(work_persons::table))
+            .inner_join(recording_persons::table)
+            .inner_join(recording_ensembles::table)
+            .inner_join(album_recordings::table)
+            .into_boxed();
+
+        if let Some(composer_id) = program.composer_id() {
+            query = query.filter(work_persons::person_id.eq(composer_id));
         }
+
+        if let Some(performer_id) = program.performer_id() {
+            query = query.filter(recording_persons::person_id.eq(performer_id));
+        }
+
+        if let Some(ensemble_id) = program.ensemble_id() {
+            query = query.filter(recording_ensembles::ensemble_id.eq(ensemble_id));
+        }
+
+        if let Some(work_id) = program.work_id() {
+            query = query.filter(recordings::work_id.eq(work_id));
+        }
+
+        if let Some(album_id) = program.album_id() {
+            query = query.filter(album_recordings::album_id.eq(album_id));
+        }
+
+        // TODO: Implement prefer_recently_added and prefer_least_recently_played.
+
+        let row = query
+            .order(random())
+            .select(tables::Recording::as_select())
+            .first::<tables::Recording>(connection)?;
+
+        Recording::from_table(row, &self.folder(), connection)
     }
 
     pub fn search_persons(&self, search: &str) -> Result<Vec<Person>> {

src/player.rs

@@ -1,4 +1,8 @@
-use crate::playlist_item::PlaylistItem;
+use std::{
+    cell::{Cell, OnceCell, RefCell},
+    sync::Arc,
+};
+
 use fragile::Fragile;
 use gstreamer_play::gst;
 use gtk::{
@@ -7,25 +11,30 @@ use gtk::{
     prelude::*,
     subclass::prelude::*,
 };
-use mpris_player::{MprisPlayer, PlaybackStatus};
+use mpris_player::{Metadata, MprisPlayer, PlaybackStatus};
 use once_cell::sync::Lazy;
-use std::{
-    cell::{Cell, OnceCell},
-    sync::Arc,
+
+use crate::{
+    db::models::{Recording, Track},
+    library::MusicusLibrary,
+    playlist_item::PlaylistItem,
+    program::Program,
 };
 
 mod imp {
-    use mpris_player::Metadata;
-
     use super::*;
 
     #[derive(Properties, Debug, Default)]
     #[properties(wrapper_type = super::MusicusPlayer)]
     pub struct MusicusPlayer {
+        #[property(get, set)]
+        pub library: RefCell<Option<MusicusLibrary>>,
         #[property(get, set)]
         pub active: Cell<bool>,
         #[property(get, set)]
         pub playing: Cell<bool>,
+        #[property(get, set = Self::set_program)]
+        pub program: RefCell<Option<Program>>,
         #[property(get, construct_only)]
         pub playlist: OnceCell<gio::ListStore>,
         #[property(get, set = Self::set_current_index)]
@@ -41,6 +50,17 @@ mod imp {
     }
 
     impl MusicusPlayer {
+        pub fn set_program(&self, program: &Program) {
+            self.program.replace(Some(program.to_owned()));
+
+            if !self.obj().active() {
+                self.obj().set_active(true);
+                self.obj().generate_items(program);
+                self.obj().set_current_index(0);
+                self.obj().play();
+            }
+        }
+
         pub fn set_current_index(&self, index: u32) {
             let playlist = self.playlist.get().unwrap();
 
@@ -144,10 +164,10 @@ mod imp {
                 if let Some(duration) = duration {
                     let obj = obj.get();
                     let imp = obj.imp();
-                    
+
                     imp.position_ms.set(0);
                     obj.notify_position_ms();
-                    
+
                     imp.duration_ms.set(duration.mseconds());
                     obj.notify_duration_ms();
                 }
@@ -183,6 +203,74 @@ impl MusicusPlayer {
         })
     }
 
+    pub fn play_recording(&self, recording: &Recording) {
+        let tracks = &recording.tracks;
+
+        if tracks.is_empty() {
+            log::warn!("Ignoring recording without tracks being added to the playlist.");
+            return;
+        }
+
+        let title = format!(
+            "{}: {}",
+            recording.work.composers_string(),
+            recording.work.name.get(),
+        );
+
+        let performances = recording.performers_string();
+
+        let mut items = Vec::new();
+
+        if tracks.len() == 1 {
+            items.push(PlaylistItem::new(
+                true,
+                &title,
+                Some(&performances),
+                None,
+                &tracks[0].path,
+            ));
+        } else {
+            let mut tracks = tracks.into_iter();
+            let first_track = tracks.next().unwrap();
+
+            let track_title = |track: &Track, number: usize| -> String {
+                let title = track
+                    .works
+                    .iter()
+                    .map(|w| w.name.get().to_string())
+                    .collect::<Vec<String>>()
+                    .join(", ");
+
+                if title.is_empty() {
+                    format!("Track {number}")
+                } else {
+                    title
+                }
+            };
+
+            items.push(PlaylistItem::new(
+                true,
+                &title,
+                Some(&performances),
+                Some(&track_title(&first_track, 1)),
+                &first_track.path,
+            ));
+
+            for (index, track) in tracks.enumerate() {
+                items.push(PlaylistItem::new(
+                    false,
+                    &title,
+                    Some(&performances),
+                    // track number = track index + 1 (first track) + 1 (zero based)
+                    Some(&track_title(&track, index + 2)),
+                    &track.path,
+                ));
+            }
+        }
+
+        self.append(items);
+    }
+
     pub fn append(&self, tracks: Vec<PlaylistItem>) {
         let playlist = self.playlist();
 
@@ -245,6 +333,9 @@ impl MusicusPlayer {
     pub fn next(&self) {
         if self.current_index() < self.playlist().n_items() - 1 {
             self.set_current_index(self.current_index() + 1);
+        } else if let Some(program) = self.program() {
+            self.generate_items(&program);
+            self.set_current_index(self.current_index() + 1);
         }
     }
 
@@ -253,6 +344,14 @@ impl MusicusPlayer {
             self.set_current_index(self.current_index() - 1);
         }
     }
+
+    fn generate_items(&self, program: &Program) {
+        if let Some(library) = self.library() {
+            // TODO: if program.play_full_recordings() {
+            let recording = library.generate_recording(program).unwrap();
+            self.play_recording(&recording);
+        }
+    }
 }
 
 impl Default for MusicusPlayer {

src/window.rs

@@ -154,6 +154,7 @@ impl MusicusWindow {
 
     fn load_library(&self, path: impl AsRef<Path>) {
         let library = MusicusLibrary::new(path);
+        self.imp().player.set_library(&library);
 
         let navigation = self.imp().navigation_view.get();
         navigation.replace(&[MusicusHomePage::new(&navigation, &library, &self.imp().player).into()]);