From 081ecdba635d748026bfde0ba540415b013b6bb0 Mon Sep 17 00:00:00 2001
From: Paul Campbell <campbjpa@amazon.com>
Date: Sat, 10 Aug 2024 08:30:23 +0100
Subject: [PATCH] WIP: TUI actor

---
 crates/cli/src/tui/actor/handlers/mod.rs |  1 +
 crates/cli/src/tui/actor/messages.rs     |  4 ++
 crates/cli/src/tui/actor/mod.rs          | 61 ++++++++++++++++++++++++
 crates/cli/src/tui/mod.rs                |  2 +
 4 files changed, 68 insertions(+)
 create mode 100644 crates/cli/src/tui/actor/handlers/mod.rs
 create mode 100644 crates/cli/src/tui/actor/messages.rs
 create mode 100644 crates/cli/src/tui/actor/mod.rs
 create mode 100644 crates/cli/src/tui/mod.rs

diff --git a/crates/cli/src/tui/actor/handlers/mod.rs b/crates/cli/src/tui/actor/handlers/mod.rs
new file mode 100644
index 0000000..8337712
--- /dev/null
+++ b/crates/cli/src/tui/actor/handlers/mod.rs
@@ -0,0 +1 @@
+//
diff --git a/crates/cli/src/tui/actor/messages.rs b/crates/cli/src/tui/actor/messages.rs
new file mode 100644
index 0000000..8366f31
--- /dev/null
+++ b/crates/cli/src/tui/actor/messages.rs
@@ -0,0 +1,4 @@
+//
+use git_next_core::message;
+
+message!(Start, "Start the TUI");
diff --git a/crates/cli/src/tui/actor/mod.rs b/crates/cli/src/tui/actor/mod.rs
new file mode 100644
index 0000000..3466668
--- /dev/null
+++ b/crates/cli/src/tui/actor/mod.rs
@@ -0,0 +1,61 @@
+//
+mod handlers;
+pub mod messages;
+
+use std::io::{stderr, Stderr};
+
+use actix::{Actor, Context};
+
+use ratatui::{
+    crossterm::{
+        execute,
+        terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
+    },
+    prelude::CrosstermBackend,
+    Terminal,
+};
+
+pub struct Tui {
+    terminal: Option<Terminal<CrosstermBackend<Stderr>>>,
+}
+
+impl Actor for Tui {
+    type Context = Context<Self>;
+
+    fn started(&mut self, _ctx: &mut Self::Context) {
+        match init() {
+            Ok(terminal) => {
+                self.terminal.replace(terminal);
+            }
+            Err(err) => tracing::error!(?err, "Failed to start terminal UI"),
+        }
+    }
+
+    fn stopped(&mut self, _ctx: &mut Self::Context) {
+        if let Err(err) = restore() {
+            match std::env::consts::OS {
+                "linux" | "macos" => {
+                    tracing::error!(
+                        ?err,
+                        "Failed to restore terminal: Type `reset` to restore terminal"
+                    );
+                }
+                "windows" => {
+                    tracing::error!(?err, "Failed to restore terminal: Reopen a new terminal");
+                }
+                _ => tracing::error!(?err, "Failed to restore terminal"),
+            }
+        }
+    }
+}
+
+fn init() -> std::io::Result<Terminal<CrosstermBackend<Stderr>>> {
+    execute!(stderr(), EnterAlternateScreen)?;
+    enable_raw_mode()?;
+    Terminal::new(CrosstermBackend::new(stderr()))
+}
+
+fn restore() -> std::io::Result<()> {
+    execute!(stderr(), LeaveAlternateScreen)?;
+    disable_raw_mode()
+}
diff --git a/crates/cli/src/tui/mod.rs b/crates/cli/src/tui/mod.rs
new file mode 100644
index 0000000..0c0cfe6
--- /dev/null
+++ b/crates/cli/src/tui/mod.rs
@@ -0,0 +1,2 @@
+//
+mod actor;