Show users if room knows them

Also selects the current room in the rooms list

cove-tui/src/room.rs

@@ -36,9 +36,9 @@ struct Connected {
 }
 
 /// State for when a client has fully joined a room.
-struct Present {
-    session: Session,
-    others: HashMap<SessionId, Session>,
+pub struct Present {
+    pub session: Session,
+    pub others: HashMap<SessionId, Session>,
 }
 
 enum Status {
@@ -95,6 +95,10 @@ impl Room {
         room
     }
 
+    pub fn present(&self) -> Option<&Present> {
+        self.present.as_ref()
+    }
+
     async fn bg_task(room: Arc<Mutex<Room>>, config: &'static Config) {
         let mut room_verified = false;
         loop {

cove-tui/src/ui.rs

@@ -237,10 +237,18 @@ impl Ui {
         let users_pane_border = areas[3];
         let users_pane_area = areas[4];
 
-        // Rooms pane
-        frame.render_widget(Rooms::new(&self.rooms), rooms_pane_area);
+        // Main pane and users pane
+        if let Some(room) = &mut self.room {
+            room.render_main(frame, main_pane_area).await;
+            room.render_users(frame, users_pane_area).await;
+        }
 
-        // TODO Main pane and users pane
+        // Rooms pane
+        let mut rooms = Rooms::new(&self.rooms);
+        if let Some(room) = &self.room {
+            rooms = rooms.select(room.name());
+        }
+        frame.render_widget(rooms, rooms_pane_area);
 
         // Pane borders and width
         self.rooms_pane.restrict_width(rooms_pane_area.width);
@@ -248,7 +256,7 @@ impl Ui {
         self.users_pane.restrict_width(users_pane_area.width);
         frame.render_widget(self.users_pane.border(), users_pane_border);
 
-        // Overlays
+        // Overlay
         if let Some(overlay) = &mut self.overlay {
             match overlay {
                 Overlay::JoinRoom(state) => {

cove-tui/src/ui/room.rs

@@ -1,12 +1,17 @@
+mod users;
+
 use std::sync::Arc;
 
 use tokio::sync::Mutex;
 use tui::backend::Backend;
 use tui::layout::Rect;
+use tui::widgets::{Block, BorderType, Borders};
 use tui::Frame;
 
 use crate::room::Room;
 
+use self::users::Users;
+
 pub struct RoomInfo {
     name: String,
     room: Arc<Mutex<Room>>,
@@ -21,11 +26,24 @@ impl RoomInfo {
         &self.name
     }
 
-    pub async fn render_messages<B: Backend>(&mut self, frame: &mut Frame<'_, B>, area: Rect) {
+    pub async fn render_main<B: Backend>(&mut self, frame: &mut Frame<'_, B>, area: Rect) {
         // TODO Implement
+        frame.render_widget(
+            Block::default()
+                .borders(Borders::TOP)
+                .border_type(BorderType::Double),
+            Rect {
+                x: area.x,
+                y: area.y + 1,
+                width: area.width,
+                height: 1,
+            },
+        );
     }
 
     pub async fn render_users<B: Backend>(&mut self, frame: &mut Frame<'_, B>, area: Rect) {
-        // TODO Implement
+        if let Some(present) = self.room.lock().await.present() {
+            frame.render_widget(Users::new(present), area);
+        }
     }
 }

cove-tui/src/ui/room/users.rs

@@ -0,0 +1,63 @@
+use std::collections::HashSet;
+use std::iter;
+
+use cove_core::{Identity, Session};
+use tui::buffer::Buffer;
+use tui::layout::Rect;
+use tui::style::{Modifier, Style};
+use tui::text::{Span, Spans};
+use tui::widgets::{Paragraph, Widget};
+
+use crate::room::Present;
+
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+struct UserInfo {
+    nick: String,
+    identity: Identity,
+}
+
+impl From<&Session> for UserInfo {
+    fn from(s: &Session) -> Self {
+        UserInfo {
+            nick: s.nick.clone(),
+            identity: s.identity,
+        }
+    }
+}
+
+pub struct Users {
+    users: Vec<UserInfo>,
+}
+
+impl Users {
+    pub fn new(present: &Present) -> Self {
+        let mut users: Vec<UserInfo> = iter::once(&present.session)
+            .chain(present.others.values())
+            .map(<&Session as Into<UserInfo>>::into)
+            .collect();
+        users.sort();
+        Self { users }
+    }
+}
+
+impl Widget for Users {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        let title_style = Style::default().add_modifier(Modifier::BOLD);
+
+        let sessions = self.users.len();
+        let identities = self
+            .users
+            .iter()
+            .map(|i| i.identity)
+            .collect::<HashSet<_>>()
+            .len();
+        let title = format!("Users ({identities}/{sessions})");
+
+        let mut lines = vec![Spans::from(Span::styled(title, title_style))];
+        for user in self.users {
+            // TODO Colour users based on identity
+            lines.push(Spans::from(Span::from(user.nick)));
+        }
+        Paragraph::new(lines).render(area, buf);
+    }
+}

cove-tui/src/ui/rooms.rs

@@ -41,22 +41,6 @@ impl Rooms {
         }
         self
     }
-
-    pub fn dummy() -> Self {
-        fn r(s: &str) -> RoomInfo {
-            RoomInfo {
-                name: s.to_string(),
-            }
-        }
-
-        let mut rooms = vec![r("xkcd"), r("test"), r("welcome"), r("music")];
-        rooms.sort();
-        Rooms {
-            rooms,
-            selected: None,
-        }
-        .select("welcome")
-    }
 }
 
 impl Widget for Rooms {