Add Delete chat interaction to Conversation screen

src/data/chat.rs

@@ -100,6 +100,30 @@ impl Chat {
             history: chat.history,
         })
     }
+
+    pub async fn delete(id: Id) -> Result<(), Error> {
+        fs::remove_file(Self::path(&id).await?).await?;
+
+        let _ = List::remove(&id).await;
+
+        match LastOpened::fetch().await {
+            Ok(LastOpened(last_opened)) if id == last_opened => {
+                let list = List::fetch().await.ok();
+
+                match list.as_ref().and_then(|list| list.entries.first()) {
+                    Some(entry) => {
+                        LastOpened::update(entry.id.clone()).await?;
+                    }
+                    None => {
+                        LastOpened::delete().await?;
+                    }
+                }
+            }
+            _ => {}
+        }
+
+        Ok(())
+    }
 }
 
 #[derive(Debug, Clone)]
@@ -232,7 +256,18 @@ impl List {
         let mut list = Self::fetch().await.unwrap_or_default();
         list.entries.insert(0, entry);
 
-        let json = task::spawn_blocking(move || serde_json::to_vec_pretty(&list)).await?;
+        list.save().await
+    }
+
+    async fn remove(id: &Id) -> Result<(), Error> {
+        let mut list = List::fetch().await?;
+        list.entries.retain(|entry| &entry.id != id);
+
+        list.save().await
+    }
+
+    async fn save(self) -> Result<(), Error> {
+        let json = task::spawn_blocking(move || serde_json::to_vec_pretty(&self)).await?;
 
         fs::write(Self::path().await?, json?).await?;
 
@@ -262,6 +297,12 @@ impl LastOpened {
 
         Ok(())
     }
+
+    async fn delete() -> Result<(), Error> {
+        fs::remove_file(Self::path().await?).await?;
+
+        Ok(())
+    }
 }
 
 async fn storage_dir() -> Result<PathBuf, io::Error> {

src/icon.rs

@@ -35,6 +35,10 @@ pub fn expand<'a>() -> Text<'a> {
     with_codepoint('\u{E807}')
 }
 
+pub fn trash<'a>() -> Text<'a> {
+    with_codepoint('\u{E808}')
+}
+
 fn with_codepoint<'a>(codepoint: char) -> Text<'a> {
     const FONT: Font = Font::with_name("icebreaker-icons");
 

src/screen/conversation.rs

@@ -10,8 +10,8 @@ use iced::padding;
 use iced::task::{self, Task};
 use iced::time::{self, Duration, Instant};
 use iced::widget::{
-    self, button, center, column, container, hover, progress_bar, row, scrollable, stack, text,
-    text_input, tooltip, value,
+    self, button, center, column, container, horizontal_space, hover, progress_bar, row,
+    scrollable, stack, text, text_input, tooltip, value,
 };
 use iced::{Center, Element, Fill, Font, Left, Right, Subscription, Theme};
 
@@ -55,6 +55,7 @@ pub enum Message {
     Saved(Result<Chat, Error>),
     Open(chat::Id),
     ChatFetched(Result<Chat, Error>),
+    Delete,
     New,
     Search,
     ToggleSidebar,
@@ -318,6 +319,18 @@ impl Conversation {
 
                 Action::Run(widget::focus_next())
             }
+            Message::Delete => {
+                if let Some(id) = self.id.clone() {
+                    Action::Run(Task::future(Chat::delete(id)).and_then(|_| {
+                        Task::batch([
+                            Task::perform(Chat::fetch_last_opened(), Message::ChatFetched),
+                            Task::perform(Chat::list(), Message::ChatsListed),
+                        ])
+                    }))
+                } else {
+                    Action::None
+                }
+            }
             Message::Search => Action::Back,
             Message::ToggleSidebar => {
                 self.sidebar_open = !self.sidebar_open;
@@ -366,7 +379,16 @@ impl Conversation {
                 tip::Position::Right,
             );
 
-            let bar = stack![title, toggle_sidebar].into();
+            let delete = tip(
+                button(icon::trash().style(text::danger))
+                    .padding(0)
+                    .on_press(Message::Delete)
+                    .style(button::text),
+                "Delete Chat",
+                tip::Position::Left,
+            );
+
+            let bar = stack![title, row![toggle_sidebar, horizontal_space(), delete]].into();
 
             match &self.state {
                 State::Booting {