Implement category playlist browsing in library

Fixes #187

src/ui/browse.rs

@@ -0,0 +1,56 @@
+use std::sync::{Arc, RwLock};
+
+use cursive::view::ViewWrapper;
+use cursive::Cursive;
+
+use crate::command::Command;
+use crate::commands::CommandResult;
+use crate::library::Library;
+use crate::model::category::Category;
+use crate::queue::Queue;
+use crate::traits::ViewExt;
+
+use crate::ui::listview::ListView;
+
+pub struct BrowseView {
+    list: ListView<Category>,
+}
+
+impl BrowseView {
+    pub fn new(queue: Arc<Queue>, library: Arc<Library>) -> Self {
+        let items = Arc::new(RwLock::new(Vec::new()));
+        let list = ListView::new(items.clone(), queue.clone(), library);
+
+        let pagination = list.get_pagination().clone();
+        std::thread::spawn(move || {
+            let categories = queue.get_spotify().api.categories();
+            items
+                .write()
+                .expect("could not writelock category items")
+                .extend(
+                    categories
+                        .items
+                        .read()
+                        .expect("could not readlock fetched categories")
+                        .clone(),
+                );
+            categories.apply_pagination(&pagination);
+        });
+
+        Self { list }
+    }
+}
+
+impl ViewWrapper for BrowseView {
+    wrap_impl!(self.list: ListView<Category>);
+}
+
+impl ViewExt for BrowseView {
+    fn title(&self) -> String {
+        "Browse".to_string()
+    }
+
+    fn on_command(&mut self, s: &mut Cursive, cmd: &Command) -> Result<CommandResult, String> {
+        self.list.on_command(s, cmd)
+    }
+}

src/ui/contextmenu.rs

@@ -18,10 +18,7 @@ use crate::sharing::write_share;
 use crate::traits::{ListItem, ViewExt};
 use crate::ui::layout::Layout;
 use crate::ui::modal::Modal;
-use crate::{
-    command::{Command, MoveAmount, MoveMode},
-    spotify::Spotify,
-};
+use crate::{command::Command, spotify::Spotify};
 use cursive::traits::{Finder, Nameable};
 
 pub struct ContextMenu {

src/ui/library.rs

@@ -10,6 +10,7 @@ use crate::config::LibraryTab;
 use crate::library::Library;
 use crate::queue::Queue;
 use crate::traits::ViewExt;
+use crate::ui::browse::BrowseView;
 use crate::ui::listview::ListView;
 use crate::ui::playlists::PlaylistsView;
 use crate::ui::tabview::TabView;
@@ -55,6 +56,9 @@ impl LibraryView {
                     ListView::new(library.shows.clone(), queue.clone(), library.clone())
                         .with_title("Podcasts"),
                 ),
+                LibraryTab::Browse => {
+                    tabview.add_tab("browse", BrowseView::new(queue.clone(), library.clone()))
+                }
             }
         }
 

src/ui/mod.rs

@@ -1,5 +1,6 @@
 pub mod album;
 pub mod artist;
+pub mod browse;
 pub mod contextmenu;
 pub mod help;
 pub mod layout;

src/ui/pagination.rs

@@ -21,6 +21,11 @@ impl<I: ListItem + Clone> ApiResult<I> {
     pub fn new(limit: u32, fetch_page: Arc<FetchPageFn<I>>) -> ApiResult<I> {
         let items = Arc::new(RwLock::new(Vec::new()));
         if let Some(first_page) = fetch_page(0) {
+            debug!(
+                "fetched first page, items: {}, total: {}",
+                first_page.items.len(),
+                first_page.total
+            );
             items.write().unwrap().extend(first_page.items);
             ApiResult {
                 offset: Arc::new(RwLock::new(first_page.offset)),