commented out glue code that isn't public build ready

displays a preset list of hosts and their response state

Updates format of input file to CSV with <host ip>,<host name> as the format.
UI now has red/green for down/up hosts
duration_to_string now in lib
improves display of how long ago change happened
log events are now displayed on the monitoring page to show when a host comes up/goes down
Modularize ui better
Adds ability to return to monitoring or quit from editing page
table in place for displaying hosts

WIP: start of being able to go up/down through the list of hosts to eventually edit them.

Cargo.lock

@@ -709,7 +709,7 @@ dependencies = [
 
 [[package]]
 name = "pp"
-version = "0.2.0-PREVIEW"
+version = "0.2.0"
 dependencies = [
  "ansi_term",
  "chrono",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pp"
-version = "0.2.0-PREVIEW"
+version = "0.2.0"
 edition = "2024"
 
 [dependencies]

src/bin/pp.rs

@@ -11,7 +11,7 @@ use clap::Parser;
 use pp::ping_result::PingResult;
 use pp::ping_request::PingRequest;
 use pp::manager::Manager;
-use pp::{duration_to_string, SECONDS_BETWEEN_DISPLAY};
+use pp::SECONDS_BETWEEN_DISPLAY;
 use pp::target_state::TargetState;
 use std::{env, error::Error, ffi::OsString, process};
 use color_eyre::owo_colors::OwoColorize;
@@ -19,6 +19,45 @@ use crossterm::style::Stylize;
 use log::debug;
 use pp::app_settings::AppSettings;
 
+const SECONDS_IN_MINUTE: u32 = 60;
+const SECONDS_IN_HOUR: u32 = SECONDS_IN_MINUTE * 60;
+const SECONDS_IN_DAY: u32 = SECONDS_IN_HOUR * 24;
+
+pub fn duration_to_string(to_convert: Duration) -> String {
+    let mut total_seconds = to_convert.as_secs() as u32;
+    let mut working_string = String::new();
+
+    if total_seconds > 86400 {
+        // days
+        let num_days = (total_seconds / SECONDS_IN_DAY) as u32;
+        working_string = format!("{} days", num_days);
+        total_seconds = total_seconds - (num_days * SECONDS_IN_DAY);
+    }
+
+    if total_seconds > 3600 {
+        // hours
+        let num_hours = (total_seconds / SECONDS_IN_HOUR) as u32;
+        if num_hours > 0 {
+            working_string = format!("{} {} hours", working_string, num_hours);
+            total_seconds = total_seconds - (num_hours * SECONDS_IN_HOUR);
+        }
+    }
+    if total_seconds > 60 {
+        let num_minutes = (total_seconds / SECONDS_IN_MINUTE) as u32;
+        if num_minutes > 0 {
+            working_string = format!("{} {} minutes", working_string, num_minutes);
+            total_seconds = total_seconds - (num_minutes * SECONDS_IN_MINUTE);
+        }
+        // minutes
+    }
+
+
+    working_string = format!("{} {} seconds", working_string, total_seconds);
+
+    working_string
+}
+
+
 struct PPState {}
 
 impl PPState {

src/bin/rat.rs

@@ -1,4 +1,5 @@
 use clap::Parser;
+use ratatui::widgets::TableState;
 use pp::app_settings::AppSettings;
 use pp::tui::ratatui_app::RatatuiApp;
 fn main() -> color_eyre::Result<()> {
@@ -11,3 +12,4 @@ fn main() -> color_eyre::Result<()> {
     ratatui::restore();
     result
 }
+

src/tui/mod.rs

@@ -1,3 +1,8 @@
-pub mod target_state_widget;
+pub mod mode_editing;
+pub mod mode_exiting;
+pub mod mode_monitoring;
 pub mod ratatui_app;
-mod ratatui_ui;
+pub mod target_state_widget;
+mod ratatui_screens;
+mod mode_deleting;
+mod mode_adding;

src/tui/mode_adding.rs

@@ -0,0 +1,36 @@
+use std::time::Duration;
+use ratatui::Frame;
+use crate::tui::ratatui_app::RatatuiApp;
+use color_eyre::Result;
+use crossterm::event;
+use crossterm::event::{Event, KeyCode, KeyEventKind};
+use ratatui::widgets::{Block, Paragraph};
+use crate::tui::ratatui_screens::RatatuiScreens::Monitoring;
+
+pub struct RatatuiAddingMode {}
+
+impl RatatuiAddingMode {
+    pub fn render(frame: &mut Frame, state: &mut RatatuiApp) {
+        frame.render_widget(
+            Paragraph::new("Not Yet Written.")
+                .block(Block::bordered())
+                .centered(),
+            frame.area()
+        );
+
+    }
+
+    pub fn handle_crossterm_events(app: &mut RatatuiApp) -> Result<()> {
+        if event::poll(Duration::from_millis(100))? {
+            match event::read()? {
+                Event::Key(key) if key.kind == KeyEventKind::Press => match key.code {
+                    KeyCode::Esc => app.set_screen(Monitoring),
+                    _ => {}
+                }
+                _ => {}
+            }
+
+        }
+        Ok(())
+    }
+}

src/tui/mode_deleting.rs

@@ -0,0 +1,46 @@
+use std::time::Duration;
+use crossterm::event;
+use crossterm::event::{Event, KeyCode, KeyEventKind};
+use ratatui::Frame;
+use ratatui::style::Stylize;
+use ratatui::text::Line;
+use ratatui::widgets::{Block, Paragraph};
+use crate::tui::ratatui_app::RatatuiApp;
+use crate::tui::ratatui_screens::RatatuiScreens::Monitoring;
+use color_eyre::Result;
+
+pub struct RatatuiDeletingMode {}
+
+impl RatatuiDeletingMode {
+    pub fn render(frame: &mut Frame, state: &mut RatatuiApp) {
+        let title = Line::from("Delete Host").bold().red().centered();
+        let mut body = format!("Do you really want to delete {} (Y/N)", state.selected_host);
+
+        frame.render_widget(
+            Paragraph::new(body)
+                .block(Block::bordered().title(title))
+                .centered(),
+            frame.area()
+        );
+    }
+
+    pub fn handle_crossterm_events(app: &mut RatatuiApp) -> Result<()> {
+        if event::poll(Duration::from_millis(100))? {
+            match event::read()? {
+                Event::Key(key) if key.kind == KeyEventKind::Press => match key.code {
+                    KeyCode::Enter | KeyCode::Char('y') | KeyCode::Char('Y') => {
+                        println!("TiME TO DELETE SELECTED");
+                    }
+                    KeyCode::Esc | KeyCode::Char('n') | KeyCode::Char('N') => {
+                        app.set_screen(Monitoring)
+                    }
+                    _ => {}
+                }
+                _ => {}
+            }
+        }
+
+        Ok(())
+    }
+}
+

src/tui/mode_editing.rs

@@ -0,0 +1,62 @@
+use std::collections::BTreeMap;
+use std::time::Duration;
+use crossterm::event;
+use crossterm::event::{Event, KeyCode, KeyEventKind};
+use ratatui::Frame;
+use ratatui::prelude::Line;
+use ratatui::style::Stylize;
+use ratatui::widgets::{Block, Paragraph};
+use crate::target_state::TargetState;
+use crate::tui::ratatui_app::RatatuiApp;
+use color_eyre::Result;
+use crate::tui::ratatui_screens::RatatuiScreens::Monitoring;
+
+pub struct RatatuiEditingMode {}
+
+impl RatatuiEditingMode {
+    pub fn handle_crossterm_events(app: &mut RatatuiApp) -> Result<()> {
+        if event::poll(Duration::from_millis(100))? {
+            match event::read()? {
+                Event::Key(key) if key.kind == KeyEventKind::Press => match key.code {
+                    KeyCode::Up => {
+                        println!("UP")
+                    }
+                    KeyCode::Down => {
+                        println!("Down")
+                    }
+                    KeyCode::Char('+') => {
+                        println!("ADD HOST")
+                    }
+                    KeyCode::Char('-') => {
+                        println!("Delete Host")
+                    }
+                    KeyCode::Char('q') => {
+                        app.set_running(false);
+                    }
+                    KeyCode::Esc => {
+                        app.set_screen(Monitoring);
+                    }
+                    KeyCode::Char('s') => {
+                        println!("Save to existing file.");
+                    }
+                    _ => {}
+                },
+                _ => {}
+            }
+        }
+        Ok(())
+    }
+
+    pub fn render(frame: &mut Frame, state: &mut BTreeMap<String, TargetState>) {
+        let title = Line::from("Editing Hosts").bold().blue().centered();
+
+        let body_text = "This is the body text for editing hosts\n'q' to exit <esc> to return to monitoring";
+
+        frame.render_widget(
+            Paragraph::new(body_text)
+                .centered()
+                .block(Block::new().title(title).blue()),
+            frame.area(),
+        );
+    }
+}

src/tui/mode_exiting.rs

@@ -0,0 +1,43 @@
+use std::time::Duration;
+use crossterm::event;
+use crossterm::event::{Event, KeyCode, KeyEventKind};
+use ratatui::Frame;
+use ratatui::style::Stylize;
+use ratatui::text::Line;
+use ratatui::widgets::{Block, Paragraph};
+use crate::tui::ratatui_app::RatatuiApp;
+use color_eyre::Result;
+use crate::tui::ratatui_screens::RatatuiScreens::Monitoring;
+
+pub struct RatatuiExitingMode {}
+
+impl RatatuiExitingMode {
+    pub fn render(frame: &mut Frame) {
+        let title = Line::from("Exit?").bold().red().centered();
+        let mut body = "Do you want to exit? (Y/N)";
+        frame.render_widget(
+            Paragraph::new(body)
+                .block(Block::bordered().title(title))
+                .centered(),
+            frame.area(),
+        );
+    }
+
+    pub fn handle_crossterm_events(app: &mut RatatuiApp) -> Result<()>{
+        if event::poll(Duration::from_millis(100))? {
+            match event::read()? {
+                Event::Key(key) if key.kind == KeyEventKind::Press => match key.code {
+                    KeyCode::Enter  | KeyCode::Char('y') | KeyCode::Char('Y') => {
+                        app.set_running(false);
+                    }
+                    KeyCode::Char('n') | KeyCode::Char('N') => {
+                        app.set_screen(Monitoring);
+                    }
+                    _ => {}
+                },
+                _ => {}
+            }
+        }
+        Ok(())
+    }
+}

src/tui/mode_monitoring.rs

@@ -0,0 +1,175 @@
+use crate::duration_to_string;
+use color_eyre::Result;
+use crossterm::event;
+use crossterm::event::{Event, KeyCode, KeyEventKind};
+use ratatui::prelude::*;
+use ratatui::widgets::{Block, Borders, Cell, List, ListItem, ListState, Paragraph, Row, Table, TableState};
+use ratatui::Frame;
+use std::time::{Duration, SystemTime};
+use ratatui::layout::Direction::Vertical;
+use crate::tui::ratatui_app::RatatuiApp;
+use crate::tui::ratatui_screens::RatatuiScreens::{Deleting, Editing, Exiting};
+
+pub struct RatatuiMonitoringMode {}
+
+impl RatatuiMonitoringMode {
+    pub fn render(frame: &mut Frame, state: &mut RatatuiApp) {
+        let layouts = Layout::default()
+            .direction(Direction::Vertical)
+            .constraints([
+                Constraint::Fill(1),
+                Constraint::Length(10),
+                Constraint::Length(3),
+            ])
+            .split(frame.area());
+
+        let body_layout = layouts[0];
+        let logs_layout = layouts[1];
+        let footer_layout = layouts[2];
+        //
+        // let title = Line::from(format!("PP v{}", env!("CARGO_PKG_VERSION")))
+        //     .bold()
+        //     .blue()
+        //     .centered();
+        // let table_size = layouts[0].area();
+        // let columns = Layout::default()
+        //     .direction(Vertical)
+        //     .constraints([Constraint::Min(30),
+        //         Constraint::Min(6),
+        //         Constraint::Min(4),
+        //         Constraint::Min(30)]);
+
+        let headers = ["Host", "Alive", "RTT", "Last Change"]
+            .iter()
+            .map(|h| Cell::from(*h));
+        let header = Row::new(headers)
+            .style(Style::default().fg(Color::Yellow))
+            .bottom_margin(1);
+        let mut rows = vec![];
+
+        for (_, current) in state.state.iter() {
+            let mut name_field = format!("{} ({})", current.name.clone(), current.target.clone());
+
+            while name_field.len() < 40 {
+                name_field.push(' ');
+            }
+
+            let name_style = if current.alive {
+                Style::default().fg(Color::Green)
+            } else {
+                Style::default().fg(Color::Red)
+            };
+
+            let to_push = vec![
+                Cell::from(name_field).style(name_style),
+                Cell::from(current.alive.to_string()),
+                Cell::from(current.last_rtt.to_string()),
+                Cell::from(
+                    format!("{} ago.",
+                            duration_to_string(
+                                SystemTime::now()
+                                    .duration_since(current.last_alive_change)
+                                    .unwrap()
+                            )
+                    )
+                )
+            ];
+
+            rows.push(Row::new(to_push));
+        }
+
+        let table = Table::new(rows, vec![Constraint::Min(30), Constraint::Min(6), Constraint::Min(5), Constraint::Min(30)])
+            .header(header)
+            .block(Block::default()
+                .title("Hosts")
+                .borders(Borders::ALL))
+            .widths(&[
+                Constraint::Min(30),
+                Constraint::Min(6),
+                Constraint::Min(4),
+                Constraint::Min(30)
+            ])
+            .highlight_style(
+                Style::default()
+                    .bg(Color::Blue)
+                    .fg(Color::White)
+                    .add_modifier(Modifier::BOLD),
+            )
+            .highlight_symbol(">> ");
+
+        // frame.render_widget(table, layouts[0]);
+        frame.render_stateful_widget(table, layouts[0], &mut make_state(state.selected_host));
+
+        let footer_text = "Press <ESC> or q to exit";
+//        let footer_text = "Press <ESC> or q to exit | Press d to delete host | Press a to add host";
+
+        let mut list_items = vec![];
+        for entry in state.get_log_entries(10) {
+            list_items.push(ListItem::new(entry));
+        }
+
+        let list = List::new(list_items)
+            .block(Block::default().title("Logs").borders(Borders::ALL))
+            .highlight_style(
+                Style::default()
+                    .fg(Color::Yellow)
+                    .add_modifier(Modifier::BOLD),
+            );
+       //     .highlight_symbol(">> ");
+
+        let mut list_state = ListState::default();
+        list_state.select(Some(0));
+
+        frame.render_stateful_widget(list, logs_layout, &mut list_state);
+
+        frame.render_widget(
+            Paragraph::new(footer_text)
+                .block(Block::bordered())
+                .centered(),
+            footer_layout,
+        );
+    }
+
+    pub fn handle_crossterm_events(app: &mut RatatuiApp) -> Result<()> {
+        if event::poll(Duration::from_millis(100))? {
+            match event::read()? {
+                Event::Key(key) if key.kind == KeyEventKind::Press => {
+                    match (key.modifiers, key.code) {
+                        (_, KeyCode::Down) => {
+                            if app.selected_host + 1 == app.state.len() {
+                                app.selected_host = 0;
+                            } else {
+                                app.selected_host += 1;
+                            }
+                        }
+                        (_, KeyCode::Up) => {
+                            if app.selected_host == 0 {
+                                app.selected_host = app.state.len() - 1;
+                            } else {
+                                app.selected_host -= 1;
+                            }
+                        }
+                        (_, KeyCode::Esc) | (_, KeyCode::Char('q')) | (_, KeyCode::Char('Q')) => {
+                            app.set_screen(Exiting);
+                        }
+                        // (_, KeyCode::Char('e')) | (_, KeyCode::Char('E')) => {
+                        //     app.set_screen(Editing);
+                        // }
+                        // (_, KeyCode::Char('d')) | (_, KeyCode::Char('D')) => {
+                        //     app.set_screen(Deleting);
+                        // }
+                        _ => {}
+                    }
+                }
+                _ => {}
+            }
+        }
+        Ok(())
+    }
+}
+
+pub fn make_state(selected: usize) -> TableState {
+    let mut state = TableState::default();
+    state.select(Some(selected));
+    state
+}

src/tui/ratatui_app.rs

@@ -1,4 +1,11 @@
+use crate::tui::ratatui_screens::RatatuiScreens;
+use crate::manager::Manager;
+use crate::ping_result::PingResult;
+use crate::target_state::TargetState;
+use chrono::{DateTime, Local};
 use color_eyre::Result;
+use ratatui::prelude::*;
+use ratatui::{DefaultTerminal, Frame};
 use std::collections::BTreeMap;
 use std::fs::File;
 use std::net::Ipv4Addr;
@@ -7,34 +14,25 @@ use std::str::FromStr;
 use std::sync::mpsc;
 use std::sync::mpsc::Receiver;
 use std::time::{Duration, SystemTime};
-use chrono::{DateTime, Local};
-use crossterm::event;
-use crossterm::event::{Event, KeyCode, KeyEvent, KeyEventKind, KeyModifiers};
-use ratatui::{DefaultTerminal, Frame};
-use ratatui::prelude::*;
-use ratatui::widgets::{Block, Paragraph};
-use crate::duration_to_string;
-use crate::manager::Manager;
-use crate::ping_result::PingResult;
-use crate::target_state::TargetState;
-use crate::tui::ratatui_ui::RatatuiUi;
+use crate::tui::mode_adding::RatatuiAddingMode;
+use crate::tui::mode_deleting::RatatuiDeletingMode;
+use crate::tui::mode_editing::RatatuiEditingMode;
+use crate::tui::mode_exiting::RatatuiExitingMode;
+use crate::tui::mode_monitoring::RatatuiMonitoringMode;
+
 
-#[derive(Default)]
-pub enum RatatuiScreens {
-    #[default]
-    Monitoring,
-    Exiting,
-    Editing
-}
 
 #[derive(Default)]
 pub struct RatatuiApp {
     running: bool,
-    pub(crate) state: BTreeMap<String, TargetState>,
+    pub state: BTreeMap<String, TargetState>,
     current_screen: RatatuiScreens,
-    pub(crate) log_entries: Vec<String>
+    log_entries: Vec<String>,
+    filename: Option<String>,
+    pub selected_host: usize
 }
 
+/// Private Methods
 impl RatatuiApp {
     pub fn run(mut self, mut terminal: DefaultTerminal) -> Result<()> {
         self.running = true;
@@ -46,21 +44,30 @@ impl RatatuiApp {
             self.consume_waiting_results(&receiver);
 
             match self.current_screen {
+                RatatuiScreens::Deleting => {
+                    terminal
+                        .draw(|frame| RatatuiDeletingMode::render(frame, &mut self))?;
+                    RatatuiDeletingMode::handle_crossterm_events(&mut self)?
+
+                }
                 RatatuiScreens::Monitoring => {
-                    terminal.draw(|frame| RatatuiUi::monitoring_mode(frame, &mut self)).expect("Unable to draw to screen");
-                    self.handle_monitoring_crossterm_events();
+                    terminal
+                        .draw(|frame| RatatuiMonitoringMode::render(frame, &mut self))?;
+                    RatatuiMonitoringMode::handle_crossterm_events(&mut self)?;
                 }
                 RatatuiScreens::Exiting => {
-                    terminal.draw(| frame | RatatuiUi::exiting_mode(frame));
-                    self.handle_exiting_crossterm_events();
+                    terminal.draw(|frame| RatatuiExitingMode::render(frame))?;
+                    RatatuiExitingMode::handle_crossterm_events(&mut self)?;
                 }
                 RatatuiScreens::Editing => {
-                    terminal.draw(|frame| RatatuiUi::editing_mode(frame, &mut self.state));
-                    self.handle_editing_crossterm_events();
+                    terminal.draw(|frame| RatatuiEditingMode::render(frame, &mut self.state))?;
+                    RatatuiEditingMode::handle_crossterm_events(&mut self)?;
+                }
+                RatatuiScreens::Adding => {
+                    terminal.draw(|frame| RatatuiAddingMode::render(frame, &mut self))?;
+                    RatatuiAddingMode::handle_crossterm_events(&mut self)?
                 }
             }
-
-                //            self.handle_crossterm_events()?;
         }
         Ok(())
     }
@@ -96,12 +103,12 @@ impl RatatuiApp {
                     let current_time: DateTime<Local> = SystemTime::now().into();
 
                     if did_change {
-                        self.log_entries.push(
-                            format!("{:?} {} for {}",
+                        self.log_entries.push(format!(
+                            "{:?} {} for {}",
                             current_time.format("%Y-%m-%d %H:%M:%S: ").to_string(),
                             success_message,
-                                    new_state.name.clone())
-                        );
+                            new_state.name.clone()
+                        ));
                     }
                 }
             }
@@ -119,118 +126,16 @@ impl RatatuiApp {
 
     fn render(&mut self, frame: &mut Frame) {
         match self.current_screen {
-            RatatuiScreens::Monitoring => { RatatuiUi::monitoring_mode(frame, self) }
-            RatatuiScreens::Exiting => { RatatuiUi::exiting_mode(frame)}
-            RatatuiScreens::Editing => { RatatuiUi::editing_mode(frame, &mut self.state) }
+            RatatuiScreens::Monitoring => RatatuiMonitoringMode::render(frame, self),
+            RatatuiScreens::Exiting => RatatuiExitingMode::render(frame),
+            RatatuiScreens::Editing => RatatuiEditingMode::render(frame, &mut self.state),
+            RatatuiScreens::Deleting => RatatuiDeletingMode::render(frame,self),
+            RatatuiScreens::Adding => RatatuiAddingMode::render(frame, self)
         }
     }
 
-    fn handle_monitoring_crossterm_events(&mut self) -> Result<()> {
-        if event::poll(Duration::from_millis(100))? {
-            match event::read()? {
-                Event::Key(key) if key.kind == KeyEventKind::Press => {
-                    match (key.modifiers, key.code) {
-                        (_, KeyCode::Esc) => {
-                            self.current_screen = RatatuiScreens::Exiting;
-                        }
-                        (_, KeyCode::Char('e')) | (_, KeyCode::Char('E')) => {
-                            self.current_screen = RatatuiScreens::Editing
-                        }
-                        _ => {}
-                    }
-                },
-                _ => {}
-            }
-        }
-        Ok(())
-    }
-
-    fn handle_exiting_crossterm_events(&mut self) -> Result<()> {
-        if event::poll(Duration::from_millis(100))? {
-            match event::read()? {
-                Event::Key(key) if key.kind == KeyEventKind::Press => {
-                    match key.code {
-                        KeyCode::Enter => { self.running = false; }
-                        KeyCode::Char('y') | KeyCode::Char('Y') => { self.running = false;
-                        }
-                        KeyCode::Char('n') | KeyCode::Char('N') => { self.current_screen = RatatuiScreens::Monitoring }
-                        _ => {}
-                    }
-                }
-                _ => {}
-            }
-        }
-        Ok(())
-    }
-
-    fn handle_editing_crossterm_events(&mut self) -> Result<()> {
-        if event::poll(Duration::from_millis(100))? {
-            match event::read()? {
-                Event::Key(key) if key.kind == KeyEventKind::Press => {
-                    match key.code {
-                        KeyCode::Up => { println!("UP") },
-                        KeyCode::Down => { println!("Down") },
-                        KeyCode::Char('+') => { println!("ADD HOST") },
-                        KeyCode::Char('-') => { println!("Delete Host") }
-                        _ => {}
-                    }
-                }
-                _ => {}
-            }
-        }
-        Ok(())
-    }
-
-    fn handle_crossterm_events(&mut self) -> Result<()> {
-        if event::poll(Duration::from_millis(100))? {
-            match event::read()? {
-                // it's important to check KeyEventKind::Press to avoid handling key release events
-                Event::Key(key) if key.kind == KeyEventKind::Press => self.on_key_event(key),
-                Event::Mouse(_) => {}
-                Event::Resize(_, _) => {}
-                _ => {}
-            }
-        }
-        Ok(())
-    }
-
-    fn quit(&mut self) { self.running = false; }
-
-    /// Handles the key events and updates the state of [`App`].
-    fn on_key_event(&mut self, key: KeyEvent) {
-        match (key.modifiers, key.code) {
-            (_, KeyCode::Esc | KeyCode::Char('q'))
-            | (KeyModifiers::CONTROL, KeyCode::Char('c') |
-            KeyCode::Char('C')) => { self.quit() }
-            // Add other key handlers here.
-            _ => {}
-        }
-    }
-    pub fn new(option: Option<PathBuf>) -> Self {
-        let targets = if let Some(file) = option {
-            let mut working = BTreeMap::new();
-            if !&file.exists() {
-                RatatuiApp::get_default_targets()
-            } else {
-                let real_file = File::open(file);
-                let mut rdr = csv::Reader::from_reader(real_file.unwrap());
-                for result in rdr.records() {
-                    let record = result.unwrap();
-                    working.insert(record[1].to_string(),
-                    TargetState {
-                        name: record[1].to_string(),
-                        target: Ipv4Addr::from_str(&record[0]).unwrap(),
-                        alive: false,
-                        last_alive_change: SystemTime::now(),
-                        last_rtt: 0
-                    });
-                }
-                working
-            }
-        } else { RatatuiApp::get_default_targets() };
-        let mut working = Self::default();
-        working.state = targets;
-        working
+    fn quit(&mut self) {
+        self.running = false;
     }
 
     fn get_default_targets() -> BTreeMap<String, TargetState> {
@@ -238,19 +143,78 @@ impl RatatuiApp {
 
         working.insert("1111 DNS".to_string(), TargetState {
             name: "1111 DNS".to_string(),
-            target: Ipv4Addr::new(1,1,1,1),
+            target: Ipv4Addr::new(1, 1, 1, 1),
             ..TargetState::default()
         });
         working.insert("Google DNS".to_string(), TargetState {
             name: "Google DNS".to_string(),
-            target: Ipv4Addr::new(8,8,8,8),
+            target: Ipv4Addr::new(8, 8, 8, 8),
             ..TargetState::default()
         });
         working.insert("Test Site 1".to_string(), TargetState {
             name: "Test Site 1".to_string(),
-            target: Ipv4Addr::new(216,234,202,122),
+            target: Ipv4Addr::new(216, 234, 202, 122),
             ..TargetState::default()
         });
         working
     }
 }
+
+
+/// Public Methods
+impl RatatuiApp {
+    pub fn new(option: Option<PathBuf>) -> Self {
+
+        let mut working = Self::default();
+        let targets = if let Some(file) = option {
+            let mut working_btree = BTreeMap::new();
+            if !&file.exists() {
+                RatatuiApp::get_default_targets();
+                working.filename = Some("hosts.txt".to_string());
+            } else {
+                let real_file = File::open(file.clone());
+                working.filename = Some(file.as_os_str().to_string_lossy().parse().unwrap());
+                let mut rdr = csv::Reader::from_reader(real_file.unwrap());
+                for result in rdr.records() {
+                    let record = result.unwrap();
+                    working_btree.insert(record[1].to_string(), TargetState {
+                        name: record[1].to_string(),
+                        target: Ipv4Addr::from_str(&record[0]).unwrap(),
+                        alive: false,
+                        last_alive_change: SystemTime::now(),
+                        last_rtt: 0,
+                    });
+                }
+            }
+            working_btree
+        } else {
+            RatatuiApp::get_default_targets()
+        };
+        working.state = targets;
+        working
+    }
+
+    pub fn set_screen(&mut self, new_screen: RatatuiScreens) {
+        self.current_screen = new_screen
+    }
+
+    pub fn set_running(&mut self, new_state: bool) {
+        self.running = new_state
+    }
+
+    pub fn clear_log(&mut self) {
+        self.log_entries.clear();
+    }
+    pub fn log_event(&mut self, to_log: String) {
+        self.log_entries.push(to_log);
+    }
+
+    pub fn get_log_entries(&self, how_many: u32) -> Vec<String> {
+        let mut return_value = vec![];
+        for current in self.log_entries.clone().into_iter().rev() {
+            return_value.push(current);
+        }
+        return_value
+
+    }
+}

src/tui/ratatui_screens.rs

@@ -0,0 +1,10 @@
+
+#[derive(Default)]
+pub enum RatatuiScreens {
+    #[default]
+    Monitoring,
+    Exiting,
+    Editing,
+    Deleting,
+    Adding
+}

src/tui/ratatui_ui.rs

@@ -1,122 +0,0 @@
-use std::collections::BTreeMap;
-use std::time::SystemTime;
-use color_eyre::owo_colors::OwoColorize;
-use ratatui::Frame;
-use ratatui::prelude::*;
-use ratatui::widgets::{Block, Borders, List, ListItem, ListState, Paragraph};
-use crate::duration_to_string;
-use crate::target_state::TargetState;
-use crate::tui::ratatui_app::RatatuiApp;
-
-pub struct RatatuiUi {}
-
-impl RatatuiUi {
-    pub fn exiting_mode(frame: &mut Frame) {
-        let title = Line::from("Exit?")
-            .bold()
-            .red()
-            .centered();
-        let mut body = "Do you want to exit? (Y/N)";
-        frame.render_widget(
-            Paragraph::new(body)
-                .block(Block::bordered().title(title))
-                .centered(),
-            frame.area()
-        );
-    }
-
-    pub fn editing_mode(frame: &mut Frame, state: &mut BTreeMap<String, TargetState>) {
-        let title = Line::from("Editing Hosts")
-            .bold()
-            .blue()
-            .centered();
-
-        let body_text = "This is the body text for editing hosts";
-
-        frame.render_widget(
-            Paragraph::new(body_text)
-                .centered()
-                .block(Block::new()
-                    .title(title)
-                    .blue()),
-            frame.area()
-        );
-    }
-
-    pub fn monitoring_mode(frame: &mut Frame, state: &mut RatatuiApp) {
-        let layouts = Layout::default()
-            .direction(Direction::Vertical)
-            .constraints([
-                Constraint::Fill(1),
-                Constraint::Length(10),
-                Constraint::Length(3)
-            ])
-            .split(frame.area());
-
-        let body_layout = layouts[0];
-        let logs_layout = layouts[1];
-        let footer_layout = layouts[2];
-
-        let title = Line::from(format!("PP v{}", env!("CARGO_PKG_VERSION")))
-            .bold()
-            .blue()
-            .centered();
-        let mut working = vec![]; // Line::from("Empty");
-        for (title, current) in state.state.iter() {
-            let mut name_field = format!("{} ({})", current.name.clone(), current.target.clone());
-
-            while name_field.len() < 40 {
-                name_field.push(' ');
-            }
-
-            let name_style = if current.alive {
-                Style::default().fg(Color::Green)
-            } else {
-                Style::default().fg(Color::Red)
-            };
-
-            working.push(Line::from(vec![
-                Span::styled(name_field, name_style),
-                Span::styled(current.alive.to_string(), Style::default()),
-                Span::styled(current.last_rtt.to_string(), Style::default()),
-                Span::styled(
-                              format!("{} ago.", duration_to_string(
-                                  SystemTime::now()
-                                      .duration_since(current.last_alive_change)
-                                      .unwrap()
-                              )), Style::default())
-                ]));
-        }
-
-        let footer_text = "Press <ESC> to exit | Press e to edit hosts";
-
-        frame.render_widget(
-            Paragraph::new(working)
-                .block(Block::bordered().title(title)),
-            body_layout
-        );
-
-        let mut list_items = vec![];
-        for entry in state.log_entries.clone().into_iter().rev() {
-            list_items.push(ListItem::new(entry));
-        }
-
-        let list = List::new(list_items)
-            .block(Block::default().title("Hosts").borders(Borders::ALL))
-            .highlight_style(Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD))
-            .highlight_symbol(">> ");
-
-        let mut list_state = ListState::default();
-        list_state.select(Some(0));
-
-        frame.render_stateful_widget(
-            list, logs_layout, &mut list_state);
-
-        frame.render_widget(
-            Paragraph::new(footer_text)
-                .block(Block::bordered())
-                .centered(),
-            footer_layout
-        );
-    }
-}