Implement save on quit

src/app.rs

@@ -82,7 +82,6 @@ pub struct App {
     pub pending_list_state: ListState,
 
     /// UI state: active pane
-    #[serde(skip)]
     pub active_pane: ActivePane,
 
     pub snowballing_iteration: usize,

src/crossterm.rs

@@ -15,7 +15,7 @@ use ratatui::{
 
 use crate::{app::App, ui};
 
-pub fn run(app: App) -> Result<(), Box<dyn Error>> {
+pub fn run(app: App) -> Result<App, Box<dyn Error>> {
     // setup terminal
     enable_raw_mode()?;
     let mut stdout = io::stdout();
@@ -35,18 +35,17 @@ pub fn run(app: App) -> Result<(), Box<dyn Error>> {
     )?;
     terminal.show_cursor()?;
 
-    if let Err(err) = app_result {
+    if let Err(err) = &app_result {
         println!("{err:?}");
     }
 
-    Ok(())
+    Ok(app_result?)
 }
 
-// TODO: Implement save on quit
 fn run_app<B: Backend>(
     terminal: &mut Terminal<B>,
     mut app: App,
-) -> io::Result<()>
+) -> io::Result<App>
 where
     io::Error: From<B::Error>,
 {
@@ -60,26 +59,7 @@ where
         }
 
         if app.should_quit {
-            return Ok(());
+            return Ok(app);
         }
     }
 }
-
-// pub fn run_app<B: Backend>(
-//     terminal: &mut Terminal<B>,
-//     mut app: App,
-// ) -> io::Result<App>
-// where
-//     io::Error: From<B::Error>,
-// {
-//     loop {
-//         terminal.draw(|f| ui(f, &app))?;
-//
-//         if let Event::Key(key) = event::read()? {
-//             app.handle_key(key.code);
-//             if app.should_quit {
-//                 return Ok(app);
-//             }
-//         }
-//     }
-// }

src/main.rs

@@ -23,7 +23,7 @@ mod snowballing;
 //     Ok(())
 // }
 
-fn load_savefile(filename: &String) -> Result<App, serde_json::Error> {
+fn deserialize_savefile(filename: &String) -> Result<App, serde_json::Error> {
     match std::fs::read_to_string(filename) {
         Ok(content) => {
             let mut app: App = serde_json::from_str(&content)?;
@@ -40,6 +40,18 @@ fn load_savefile(filename: &String) -> Result<App, serde_json::Error> {
     }
 }
 
+fn serialize_savefile(
+    app: &App,
+    filename: &String,
+) -> Result<(), serde_json::Error> {
+    if let Ok(serialized) = serde_json::to_string_pretty(&app) {
+        std::fs::write(filename, serialized)
+            .expect("We can't really deal with io errors ourselves");
+    }
+
+    Ok(())
+}
+
 use clap::Parser;
 mod crossterm;
 use std::error::Error;
@@ -54,9 +66,11 @@ struct Args {
 
 fn main() -> Result<(), Box<dyn Error>> {
     let args = Args::parse();
-    let app = load_savefile(&args.savefile)?;
+    let starting_app_state = deserialize_savefile(&args.savefile)?;
 
-    crate::crossterm::run(app)?;
+    let final_app_state = crate::crossterm::run(starting_app_state)?;
+
+    serialize_savefile(&final_app_state, &args.savefile)?;
 
     Ok(())
 }