Add "Next" column

src/list.rs

@@ -8,7 +8,7 @@ use ratatui::{
     backend::CrosstermBackend,
     layout::{Constraint, Rect},
     style::{Style, Stylize},
-    text::{Line, Span},
+    text::Span,
     widgets::{Block, Borders, HighlightSpacing, Row, Table, TableState},
     Terminal,
 };
@@ -17,7 +17,7 @@ use std::io;
 use crate::{exercise::Exercise, state::State};
 
 fn table<'a>(state: &State, exercises: &'a [Exercise]) -> Table<'a> {
-    let header = Row::new(["State", "Name", "Path"]);
+    let header = Row::new(["Next", "State", "Name", "Path"]);
 
     let max_name_len = exercises
         .iter()
@@ -26,6 +26,7 @@ fn table<'a>(state: &State, exercises: &'a [Exercise]) -> Table<'a> {
         .unwrap_or(4) as u16;
 
     let widths = [
+        Constraint::Length(4),
         Constraint::Length(7),
         Constraint::Length(max_name_len),
         Constraint::Fill(1),
@@ -34,14 +35,23 @@ fn table<'a>(state: &State, exercises: &'a [Exercise]) -> Table<'a> {
     let rows = exercises
         .iter()
         .zip(&state.progress)
-        .map(|(exercise, done)| {
+        .enumerate()
-            let state = if *done {
+        .map(|(ind, (exercise, done))| {
+            let exercise_state = if *done {
                 "DONE".green()
             } else {
                 "PENDING".yellow()
             };
+
+            let next = if ind == state.next_exercise_ind {
+                ">>>>".bold().red()
+            } else {
+                Span::default()
+            };
+
             Row::new([
-                state,
+                next,
+                exercise_state,
                 Span::raw(&exercise.name),
                 Span::raw(exercise.path.to_string_lossy()),
             ])

src/state.rs

@@ -6,6 +6,7 @@ use crate::exercise::Exercise;
 
 #[derive(Serialize, Deserialize)]
 pub struct State {
+    pub next_exercise_ind: usize,
     pub progress: Vec<bool>,
 }
 
@@ -15,7 +16,7 @@ impl State {
 
         let slf: Self = serde_json::de::from_slice(&file_content).ok()?;
 
-        if slf.progress.len() != exercises.len() {
+        if slf.progress.len() != exercises.len() || slf.next_exercise_ind >= exercises.len() {
             return None;
         }
 
@@ -24,6 +25,7 @@ impl State {
 
     pub fn read_or_default(exercises: &[Exercise]) -> Self {
         Self::read(exercises).unwrap_or_else(|| Self {
+            next_exercise_ind: 0,
             progress: vec![false; exercises.len()],
         })
     }