Make initial rooms sort order configurable

CHANGELOG.md

@@ -20,6 +20,7 @@ Procedure when bumping the version number:
 - Message inspection popup
 - Session inspection popup
 - Error popup when external editor fails
+- `rooms_sort_order` config option
 
 ### Changed
 - Use nick changes to detect sessions for nick list

README.md

@@ -115,6 +115,22 @@ the rooms list.
 
 See also the `--offline` command line option.
 
+### `rooms_sort_order`
+
+**Type:** String, one of `alphabetic`, `importance`  
+**Default:** `alphabetic`
+
+Initial sort order of rooms list.
+
+`alphabetic` sorts rooms in alphabetic order.
+
+`importance` sorts rooms by the following criteria (in descending order of
+priority):
+
+1. connected rooms before unconnected rooms
+2. rooms with unread messages before rooms without
+3. alphabetic order
+
 ### `euph.rooms.<room>.autojoin`
 
 **Type:** Boolean  

src/config.rs

@@ -6,6 +6,14 @@ use serde::Deserialize;
 
 use crate::macros::ok_or_return;
 
+#[derive(Debug, Clone, Copy, Default, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum RoomsSortOrder {
+    #[default]
+    Alphabet,
+    Importance,
+}
+
 #[derive(Debug, Clone, Default, Deserialize)]
 pub struct EuphRoom {
     // TODO Mark favourite rooms via printable ascii characters
@@ -29,6 +37,8 @@ pub struct Config {
     pub ephemeral: bool,
     #[serde(default)]
     pub offline: bool,
+    #[serde(default)]
+    pub rooms_sort_order: RoomsSortOrder,
     // TODO Invoke external notification command?
     pub euph: Euph,
 }

src/ui/rooms.rs

@@ -10,7 +10,7 @@ use tokio::sync::mpsc;
 use toss::styled::Styled;
 use toss::terminal::Terminal;
 
-use crate::config::Config;
+use crate::config::{Config, RoomsSortOrder};
 use crate::euph::EuphRoomEvent;
 use crate::vault::Vault;
 
@@ -38,6 +38,15 @@ enum Order {
     Importance,
 }
 
+impl Order {
+    fn from_rooms_sort_order(order: RoomsSortOrder) -> Self {
+        match order {
+            RoomsSortOrder::Alphabet => Self::Alphabet,
+            RoomsSortOrder::Importance => Self::Importance,
+        }
+    }
+}
+
 pub struct Rooms {
     config: &'static Config,
 
@@ -63,7 +72,7 @@ impl Rooms {
             ui_event_tx,
             state: State::ShowList,
             list: ListState::new(),
-            order: Order::Alphabet,
+            order: Order::from_rooms_sort_order(config.rooms_sort_order),
             euph_rooms: HashMap::new(),
         };