pass clippy

src/tui.rs

@@ -1,18 +1,19 @@
 #![allow(clippy::struct_excessive_bools)]
 
 use crossterm::{
-    cursor::MoveTo,
-    event::{
-        self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEventKind, KeyModifiers,
-    },
+    event::{self, Event, KeyCode, KeyEventKind, KeyModifiers},
     execute,
-    style::{
-        Color, Print, ResetColor, SetBackgroundColor, SetForegroundColor, Stylize,
-    },
-    terminal::{disable_raw_mode, enable_raw_mode, Clear, ClearType},
+    terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
 };
-use std::io::{self, Write};
-use std::time::Instant;
+use ratatui::{
+    backend::CrosstermBackend,
+    layout::{Alignment, Constraint, Direction, Layout},
+    style::{Color, Modifier, Style},
+    text::{Line, Span},
+    widgets::{Block, Paragraph},
+    Frame, Terminal,
+};
+use std::io;
 
 #[derive(Debug, Clone)]
 pub struct TuiConfig {
@@ -50,35 +51,27 @@ impl TuiConfig {
         if !self.output_dir.is_empty() {
             args.extend(["-o".to_string(), self.output_dir.clone()]);
         }
-
         if self.subdomains {
             args.push("--subdomains".to_string());
         }
-
         if self.single {
             args.push("--single".to_string());
         }
-
         if self.no_scope {
             args.push("--no-scope".to_string());
         }
-
         if self.no_doc_conversion {
             args.push("--no-doc-conversion".to_string());
         }
-
         if self.delay_ms != 1000 {
             args.extend(["--delay-ms".to_string(), self.delay_ms.to_string()]);
         }
-
         if let Some(ref t) = self.types {
             args.extend(["--types".to_string(), t.clone()]);
         }
-
         if let Some(ref t) = self.exclude_types {
             args.extend(["--exclude-types".to_string(), t.clone()]);
         }
-
         args
     }
 
@@ -92,24 +85,16 @@ fn validate_comma_list(input: &str) -> Result<(), String> {
     if trimmed.is_empty() {
         return Ok(());
     }
-
-    let items: Vec<&str> = trimmed
-        .split(',')
-        .map(str::trim)
-        .filter(|s| !s.is_empty())
-        .collect();
-
+    let items: Vec<&str> = trimmed.split(',').map(str::trim).filter(|s| !s.is_empty()).collect();
     if items.is_empty() {
         return Err("List cannot be empty".to_string());
     }
-
     for item in &items {
         let check = item.strip_prefix('.').unwrap_or(item);
         if check.is_empty() || !check.chars().all(char::is_alphanumeric) {
             return Err(format!("Invalid item '{item}': use extensions like 'pdf' or '.pdf'"));
         }
     }
-
     Ok(())
 }
 
@@ -208,6 +193,14 @@ impl FieldIndex {
                 | FieldIndex::NoDocConversion
         )
     }
+
+    fn subtitle(self) -> &'static str {
+        match self {
+            FieldIndex::DelayMs => "[enter positive integer]",
+            FieldIndex::TypesInclude | FieldIndex::TypesExclude => "[comma-separated, dots optional]",
+            _ => "",
+        }
+    }
 }
 
 const ALL_FIELDS: [FieldIndex; 10] = [
@@ -223,108 +216,191 @@ const ALL_FIELDS: [FieldIndex; 10] = [
     FieldIndex::Submit,
 ];
 
+enum Action {
+    Continue,
+    Cancel,
+    Submit,
+}
+
 pub fn run_tui() -> io::Result<Option<TuiConfig>> {
     enable_raw_mode()?;
     let mut stdout = io::stdout();
-    execute!(stdout, EnableMouseCapture)?;
+    execute!(stdout, EnterAlternateScreen)?;
+    let backend = CrosstermBackend::new(stdout);
+    let mut terminal = Terminal::new(backend)?;
 
     let mut config = TuiConfig::default();
     let mut current_field = FieldIndex::StartUrl;
     let mut text_input = String::new();
     let mut errors: Vec<(FieldIndex, String)> = Vec::new();
-    let mut last_render = Instant::now();
 
     load_field_into_input(&mut text_input, &config, current_field);
 
     loop {
-        if last_render.elapsed().as_millis() > 50 {
-            render_ui(&mut stdout, &config, current_field, &errors)?;
-            last_render = Instant::now();
-        }
+        terminal.draw(|frame| ui(frame, &config, current_field, &errors))?;
 
         if event::poll(std::time::Duration::from_millis(50))?
             && let Event::Key(key) = event::read()?
             && key.kind == KeyEventKind::Press
         {
-            handle_key_event(
+            let action = handle_key_event(
                 &mut config,
                 &mut current_field,
                 &mut text_input,
                 &mut errors,
                 key.code,
                 key.modifiers,
-            )?;
+            );
+            match action {
+                Action::Continue => {}
+                Action::Cancel => {
+                    disable_raw_mode()?;
+                    execute!(terminal.backend_mut(), LeaveAlternateScreen)?;
+                    terminal.show_cursor()?;
+                    return Ok(None);
+                }
+                Action::Submit => {
+                    disable_raw_mode()?;
+                    execute!(terminal.backend_mut(), LeaveAlternateScreen)?;
+                    terminal.show_cursor()?;
+                    return Ok(Some(config));
                 }
             }
         }
-
-fn render_ui(stdout: &mut io::Stdout, config: &TuiConfig, current_field: FieldIndex, errors: &[(FieldIndex, String)]) -> io::Result<()> {
-    execute!(stdout, Clear(ClearType::All), MoveTo(0, 0))?;
-
-    writeln!(stdout, "{}", "Interactive Web Scraper Configuration".cyan().bold())?;
-    writeln!(stdout, "{}", "=".repeat(60).blue())?;
-    writeln!(stdout)?;
-
-    for &field in &ALL_FIELDS {
-        let marker = if current_field == field { ">" } else { " " };
-        let value_text = get_field_display(config, field);
-        let hint = field.hint();
-
-        if current_field == field {
-            execute!(
-                stdout,
-                SetBackgroundColor(Color::DarkGrey),
-                Print(format!("{marker} {:30}: ", field.label())),
-                ResetColor
-            )?;
-        } else {
-            write!(stdout, "{marker} {:30}: ", field.label())?;
-        }
-
-        if !value_text.is_empty() {
-            write!(stdout, "{value_text}")?;
-        } else if !hint.is_empty() {
-            write!(stdout, "{}", hint.dark_grey())?;
-        }
-
-        if let Some((_, err)) = errors.iter().find(|(f, _)| *f == field) {
-            execute!(
-                stdout,
-                SetForegroundColor(Color::Red),
-                Print(format!("  [err: {err}]")),
-                ResetColor
-            )?;
-        }
-
-        writeln!(stdout)?;
-
-        if field.is_boolean_field() {
-            let enabled = get_bool_field(config, field);
-            writeln!(stdout, "                                 [{}]",
-                if enabled { "enabled" } else { "disabled" })?;
-        } else if field == FieldIndex::DelayMs {
-            writeln!(stdout, "                                 [enter positive integer]")?;
-        } else if field == FieldIndex::TypesInclude || field == FieldIndex::TypesExclude {
-            writeln!(stdout, "                                 [comma-separated, dots optional e.g. .pdf,xlsx]")?;
     }
 }
 
-    writeln!(stdout)?;
-    writeln!(stdout, "{}", "Controls:".dark_grey())?;
-    writeln!(stdout, "  Enter   : Next field / Toggle boolean / Submit")?;
-    writeln!(stdout, "  Tab     : Next field")?;
-    writeln!(stdout, "  Shift+Tab: Previous field")?;
-    writeln!(stdout, "  Ctrl+C  : Exit without running")?;
-    writeln!(stdout, "  Esc     : Exit without running")?;
+#[allow(clippy::too_many_lines)]
+fn ui(frame: &mut Frame, config: &TuiConfig, current_field: FieldIndex, errors: &[(FieldIndex, String)]) {
+    let title_line = Line::from(Span::styled(
+        "Interactive Web Scraper Configuration",
+        Style::default().fg(Color::LightCyan).add_modifier(Modifier::BOLD),
+    ));
+
+    let controls_lines: Vec<Line> = vec![
+        Line::from(Span::styled("Controls:", Style::default().fg(Color::DarkGray))),
+        Line::from("  Enter    : Next field / Toggle boolean / Submit"),
+        Line::from("  Tab      : Next field"),
+        Line::from("  Shift+Tab: Previous field"),
+        Line::from("  Ctrl+C   : Exit without running"),
+        Line::from("  Esc      : Exit without running"),
+    ];
 
     let cmd_preview = config.build_command();
-    writeln!(stdout)?;
-    writeln!(stdout, "{}", "Command preview:".yellow())?;
-    writeln!(stdout, "  {cmd_preview}", cmd_preview = cmd_preview.green())?;
+    let cmd_lines: Vec<Line> = vec![
+        Line::from(Span::styled(
+            "Command preview:",
+            Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD),
+        )),
+        Line::from(Span::styled(format!("  {cmd_preview}"), Style::default().fg(Color::Yellow))),
+    ];
 
-    stdout.flush()?;
+    let status_text = if config.start_url.is_empty() {
+        "Waiting for Start URL..."
+    } else {
+        "Ready. Press Enter on Submit to run."
+    };
+    let status_style = if config.start_url.is_empty() {
+        Style::default().fg(Color::Yellow)
+    } else {
+        Style::default().fg(Color::Green)
+    };
+    let status_line = Line::from(Span::styled(status_text, status_style));
 
-    Ok(())
+    let chunks = Layout::default()
+        .direction(Direction::Vertical)
+        .margin(1)
+        .constraints([
+            Constraint::Length(1),
+            Constraint::Min(10),
+            Constraint::Length(6),
+            Constraint::Length(3),
+            Constraint::Length(1),
+        ])
+        .split(frame.area());
+
+    frame.render_widget(Paragraph::new(title_line), chunks[0]);
+
+    let field_chunks = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints(std::iter::repeat_n(Constraint::Length(2), ALL_FIELDS.len()).collect::<Vec<_>>())
+        .split(chunks[1]);
+
+    for (i, &field) in ALL_FIELDS.iter().enumerate() {
+        render_field(frame, field_chunks[i], config, current_field, field, errors);
+    }
+
+    frame.render_widget(Paragraph::new(controls_lines), chunks[2]);
+    frame.render_widget(Paragraph::new(cmd_lines), chunks[3]);
+
+    let error_line = if let Some((_, err)) = errors.iter().find(|(f, _)| *f == FieldIndex::Submit) {
+        Line::from(Span::styled(format!("[ERR: {err}]"), Style::default().fg(Color::Red)))
+    } else {
+        status_line
+    };
+    frame.render_widget(
+        Paragraph::new(error_line).alignment(Alignment::Center),
+        chunks[4],
+    );
+}
+
+fn render_field(frame: &mut Frame, area: ratatui::layout::Rect, config: &TuiConfig, current_field: FieldIndex, field: FieldIndex, errors: &[(FieldIndex, String)]) {
+    let value_text = get_field_display(config, field);
+    let hint = field.hint();
+    let is_active = current_field == field;
+
+    let display_value = if !value_text.is_empty() {
+        value_text.as_str()
+    } else if !hint.is_empty() {
+        hint
+    } else {
+        ""
+    };
+
+    let bool_state = if field.is_boolean_field() {
+        format!("  [{}]", if get_bool_field(config, field) { "enabled" } else { "disabled" })
+    } else {
+        String::new()
+    };
+
+    let prefix = if is_active { ">" } else { " " };
+    let label = format!("{:30} ", format!("{}:", field.label()));
+    let subtitle = field.subtitle();
+
+    let value_style = if is_active {
+        Style::default()
+    } else if display_value.is_empty() || display_value == hint {
+        Style::default().fg(Color::DarkGray)
+    } else {
+        Style::default()
+    };
+
+    let mut spans = vec![
+        Span::styled(
+            format!("{prefix} {label}"),
+            if is_active {
+                Style::default().add_modifier(Modifier::BOLD)
+            } else {
+                Style::default()
+            },
+        ),
+        Span::styled(display_value.to_string(), value_style),
+        Span::styled(bool_state, Style::default().fg(Color::DarkGray)),
+        Span::styled(format!("  {subtitle}"), Style::default().fg(Color::DarkGray)),
+    ];
+
+    if let Some((_, err)) = errors.iter().find(|(f, _)| *f == field) {
+        spans.push(Span::styled(format!("  [ERR: {err}]"), Style::default().fg(Color::Red)));
+    }
+
+    let line = Line::from(spans);
+    let block = if is_active {
+        Block::default().style(Style::default().bg(Color::DarkGray))
+    } else {
+        Block::default()
+    };
+    let widget = Paragraph::new(line).block(block);
+    frame.render_widget(widget, area);
 }
 
 fn get_bool_field(config: &TuiConfig, field: FieldIndex) -> bool {
@@ -367,8 +443,12 @@ fn load_field_into_input(text_input: &mut String, config: &TuiConfig, field: Fie
 
 fn save_input_to_field(config: &mut TuiConfig, field: FieldIndex, text_input: &str) {
     match field {
-        FieldIndex::StartUrl => { config.start_url = text_input.to_string(); }
-        FieldIndex::OutputDir => { config.output_dir = text_input.to_string(); }
+        FieldIndex::StartUrl => {
+            config.start_url = text_input.to_string();
+        }
+        FieldIndex::OutputDir => {
+            config.output_dir = text_input.to_string();
+        }
         FieldIndex::DelayMs => {
             if let Ok(val) = text_input.trim().parse::<u64>() {
                 config.delay_ms = val;
@@ -376,11 +456,19 @@ fn save_input_to_field(config: &mut TuiConfig, field: FieldIndex, text_input: &s
         }
         FieldIndex::TypesInclude => {
             let trimmed = text_input.trim();
-            config.types = if trimmed.is_empty() { None } else { Some(trimmed.to_string()) };
+            config.types = if trimmed.is_empty() {
+                None
+            } else {
+                Some(trimmed.to_string())
+            };
         }
         FieldIndex::TypesExclude => {
             let trimmed = text_input.trim();
-            config.exclude_types = if trimmed.is_empty() { None } else { Some(trimmed.to_string()) };
+            config.exclude_types = if trimmed.is_empty() {
+                None
+            } else {
+                Some(trimmed.to_string())
+            };
         }
         _ => {}
     }
@@ -393,42 +481,43 @@ fn handle_key_event(
     errors: &mut Vec<(FieldIndex, String)>,
     code: KeyCode,
     modifiers: KeyModifiers,
-) -> io::Result<bool> {
+) -> Action {
     match code {
         KeyCode::Esc
         | KeyCode::Char('c') if modifiers.contains(KeyModifiers::CONTROL) => {
-            disable_raw_mode()?;
-            execute!(io::stdout(), DisableMouseCapture)?;
-            return Ok(false);
+            Action::Cancel
         }
         KeyCode::Tab => {
             save_input_to_field(config, *current_field, text_input);
             *current_field = current_field.next();
             load_field_into_input(text_input, config, *current_field);
             errors.clear();
+            Action::Continue
         }
         KeyCode::BackTab => {
             save_input_to_field(config, *current_field, text_input);
             *current_field = current_field.prev();
             load_field_into_input(text_input, config, *current_field);
             errors.clear();
+            Action::Continue
         }
         KeyCode::Enter => {
-            process_enter(config, current_field, text_input, errors);
+            process_enter(config, current_field, text_input, errors)
         }
         KeyCode::Char(ch) if current_field.is_text_field() => {
             text_input.push(ch);
+            Action::Continue
         }
         KeyCode::Backspace if current_field.is_text_field() => {
             text_input.pop();
+            Action::Continue
         }
         KeyCode::Delete if current_field.is_text_field() => {
             text_input.clear();
+            Action::Continue
         }
-        _ => {}
+        _ => Action::Continue,
     }
-
-    Ok(true)
 }
 
 fn process_enter(
@@ -436,19 +525,23 @@ fn process_enter(
     current_field: &mut FieldIndex,
     text_input: &mut String,
     errors: &mut Vec<(FieldIndex, String)>,
-) {
+) -> Action {
     match *current_field {
         FieldIndex::Subdomains => {
             config.subdomains = !config.subdomains;
+            Action::Continue
         }
         FieldIndex::Single => {
             config.single = !config.single;
+            Action::Continue
         }
         FieldIndex::NoScope => {
             config.no_scope = !config.no_scope;
+            Action::Continue
         }
         FieldIndex::NoDocConversion => {
             config.no_doc_conversion = !config.no_doc_conversion;
+            Action::Continue
         }
         FieldIndex::StartUrl => {
             save_input_to_field(config, *current_field, text_input);
@@ -460,12 +553,14 @@ fn process_enter(
                 *current_field = current_field.next();
                 load_field_into_input(text_input, config, *current_field);
             }
+            Action::Continue
         }
         FieldIndex::OutputDir | FieldIndex::DelayMs => {
             save_input_to_field(config, *current_field, text_input);
             errors.clear();
             *current_field = current_field.next();
             load_field_into_input(text_input, config, *current_field);
+            Action::Continue
         }
         FieldIndex::TypesInclude => {
             save_input_to_field(config, *current_field, text_input);
@@ -481,6 +576,7 @@ fn process_enter(
                     errors.push((FieldIndex::TypesInclude, e));
                 }
             }
+            Action::Continue
         }
         FieldIndex::TypesExclude => {
             save_input_to_field(config, *current_field, text_input);
@@ -496,37 +592,36 @@ fn process_enter(
                     errors.push((FieldIndex::TypesExclude, e));
                 }
             }
+            Action::Continue
         }
         FieldIndex::Submit => {
             if config.start_url.trim().is_empty() {
                 errors.retain(|(f, _)| *f != FieldIndex::StartUrl);
                 errors.push((FieldIndex::StartUrl, "Required".into()));
-                return;
+                return Action::Continue;
             }
-
             if let Some(ref t) = config.types
                 && let Err(e) = validate_comma_list(t)
             {
                 errors.retain(|(f, _)| *f != FieldIndex::TypesInclude);
                 errors.push((FieldIndex::TypesInclude, e));
-                return;
+                return Action::Continue;
             }
             if let Some(ref t) = config.exclude_types
                 && let Err(e) = validate_comma_list(t)
             {
                 errors.retain(|(f, _)| *f != FieldIndex::TypesExclude);
                 errors.push((FieldIndex::TypesExclude, e));
-                return;
+                return Action::Continue;
             }
-
             if config.types.is_some() && config.exclude_types.is_some() {
-                errors.push((FieldIndex::Submit, "types and exclude-types are mutually exclusive".into()));
-                return;
+                errors.push((
+                    FieldIndex::Submit,
+                    "types and exclude-types are mutually exclusive".into(),
+                ));
+                return Action::Continue;
             }
-
-            disable_raw_mode().unwrap();
-            execute!(io::stdout(), DisableMouseCapture).unwrap();
-            std::process::exit(0);
+            Action::Submit
         }
     }
 }