use std::default::Default; use std::f64; use std::fs::{File, OpenOptions}; use std::io::prelude::*; use std::path::PathBuf; use std::sync::mpsc::{channel, Receiver}; use std::time::Duration; use chrono::Local; use cursive::direction::{Absolute, Direction}; use cursive::event::{Event, EventResult, Key}; use cursive::view::View; use cursive::{Printer, Vec2}; use notify::{watcher, DebouncedEvent, INotifyWatcher, RecursiveMode, Watcher}; use crate::habit::{Bit, Count, HabitWrapper, TrackEvent, ViewMode}; use crate::utils; use crate::Command; use crate::CONFIGURATION; struct StatusLine(String, String); pub struct App { // holds app data habits: Vec>, _file_watcher: INotifyWatcher, file_event_recv: Receiver, focus: usize, view_month_offset: u32, } impl Default for App { fn default() -> Self { App::new() } } impl App { pub fn new() -> Self { let (tx, rx) = channel(); let mut watcher = watcher(tx, Duration::from_secs(1)).unwrap(); watcher .watch(utils::auto_habit_file(), RecursiveMode::Recursive) .unwrap_or_else(|e| { panic!("Unable to start file watcher: {}", e); }); return App { habits: vec![], focus: 0, _file_watcher: watcher, file_event_recv: rx, view_month_offset: 0, }; } pub fn add_habit(&mut self, h: Box) { self.habits.push(h); } pub fn delete_by_name(&mut self, name: &str) { self.habits.retain(|h| h.name() != name); } pub fn get_mode(&self) -> ViewMode { if self.habits.is_empty() { return ViewMode::Day; } return self.habits[self.focus].view_mode(); } pub fn set_mode(&mut self, mode: ViewMode) { if !self.habits.is_empty() { self.habits[self.focus].set_view_mode(mode); } } pub fn set_view_month_offset(&mut self, offset: u32) { self.view_month_offset = offset; for v in self.habits.iter_mut() { v.set_view_month_offset(offset); } } pub fn sift_backward(&mut self) { self.view_month_offset += 1; for v in self.habits.iter_mut() { v.set_view_month_offset(self.view_month_offset); } } pub fn sift_forward(&mut self) { if self.view_month_offset > 0 { self.view_month_offset -= 1; for v in self.habits.iter_mut() { v.set_view_month_offset(self.view_month_offset); } } } fn set_focus(&mut self, d: Absolute) { let grid_width = CONFIGURATION.grid_width; match d { Absolute::Right => { if self.focus != self.habits.len() - 1 { self.focus += 1; } } Absolute::Left => { if self.focus != 0 { self.focus -= 1; } } Absolute::Down => { if self.focus + grid_width < self.habits.len() - 1 { self.focus += grid_width; } else { self.focus = self.habits.len() - 1; } } Absolute::Up => { if self.focus as isize - grid_width as isize >= 0 { self.focus -= grid_width; } else { self.focus = 0; } } Absolute::None => {} } } fn status(&self) -> StatusLine { let today = chrono::Local::now().naive_utc().date(); let remaining = self.habits.iter().map(|h| h.remaining(today)).sum::(); let total = self.habits.iter().map(|h| h.goal()).sum::(); let completed = total - remaining; let timestamp = if self.view_month_offset == 0 { format!("{}", Local::now().date().format("%d/%b/%y"),) } else { let months = self.view_month_offset; format!("{}", format!("{} months ago", months),) }; StatusLine { 0: format!( "Today: {} completed, {} remaining --{}--", completed, remaining, self.get_mode() ), 1: timestamp, } } fn max_size(&self) -> Vec2 { let grid_width = CONFIGURATION.grid_width; let width = { if self.habits.len() > 0 { grid_width * CONFIGURATION.view_width } else { 0 } }; let height = { if self.habits.len() > 0 { (CONFIGURATION.view_height as f64 * (self.habits.len() as f64 / grid_width as f64).ceil()) as usize } else { 0 } }; Vec2::new(width, height + 2) } pub fn load_state() -> Self { let (regular_f, auto_f) = (utils::habit_file(), utils::auto_habit_file()); let read_from_file = |file: PathBuf| -> Vec> { if let Ok(ref mut f) = File::open(file) { let mut j = String::new(); f.read_to_string(&mut j); return serde_json::from_str(&j).unwrap(); } else { return Vec::new(); } }; let mut regular = read_from_file(regular_f); let auto = read_from_file(auto_f); regular.extend(auto); return App { habits: regular, ..Default::default() }; } // this function does IO // TODO: convert this into non-blocking async function pub fn save_state(&self) { let (regular, auto): (Vec<_>, Vec<_>) = self.habits.iter().partition(|&x| !x.is_auto()); let (regular_f, auto_f) = (utils::habit_file(), utils::auto_habit_file()); let write_to_file = |data: Vec<&Box>, file: PathBuf| { let j = serde_json::to_string_pretty(&data).unwrap(); match OpenOptions::new() .write(true) .create(true) .truncate(true) .open(file) { Ok(ref mut f) => f.write_all(j.as_bytes()).unwrap(), Err(_) => panic!("Unable to write!"), }; }; write_to_file(regular, regular_f); write_to_file(auto, auto_f); } pub fn parse_command(&mut self, c: Command) { match c { Command::Add(name, goal, auto) => { let kind = if goal == Some(1) { "bit" } else { "count" }; if kind == "count" { self.add_habit(Box::new(Count::new( name, goal.unwrap_or(0), auto.unwrap_or(false), ))); } else if kind == "bit" { self.add_habit(Box::new(Bit::new(name, auto.unwrap_or(false)))); } } Command::Delete(name) => { self.delete_by_name(&name); self.focus = 0; } Command::TrackUp(name) => { let target_habit = self .habits .iter_mut() .find(|x| x.name() == name && x.is_auto()); if let Some(h) = target_habit { h.modify(Local::now().naive_utc().date(), TrackEvent::Increment); } } Command::TrackDown(name) => { let target_habit = self .habits .iter_mut() .find(|x| x.name() == name && x.is_auto()); if let Some(h) = target_habit { h.modify(Local::now().naive_utc().date(), TrackEvent::Decrement); } } Command::Quit => self.save_state(), Command::MonthNext => self.sift_forward(), Command::MonthPrev => self.sift_backward(), _ => { eprintln!("UNKNOWN COMMAND!"); } } } } impl View for App { fn draw(&self, printer: &Printer) { let grid_width = CONFIGURATION.grid_width; let view_width = CONFIGURATION.view_width; let view_height = CONFIGURATION.view_height; let mut offset = Vec2::zero(); for (idx, i) in self.habits.iter().enumerate() { if idx >= grid_width && idx % grid_width == 0 { offset = offset.map_y(|y| y + view_height).map_x(|_| 0); } i.draw(&printer.offset(offset).focused(self.focus == idx)); offset = offset.map_x(|x| x + view_width + 2); } offset = offset.map_x(|_| 0).map_y(|_| self.max_size().y - 2); let status = self.status(); printer.print(offset, &status.0); // left status let full = self.max_size().x; offset = offset.map_x(|_| full - status.1.len()); printer.print(offset, &status.1); // right status } fn required_size(&mut self, _: Vec2) -> Vec2 { let grid_width = CONFIGURATION.grid_width; let view_width = CONFIGURATION.view_width; let view_height = CONFIGURATION.view_height; let width = { if self.habits.len() > 0 { grid_width * (view_width + 2) } else { 0 } }; let height = { if self.habits.len() > 0 { (view_height as f64 * (self.habits.len() as f64 / grid_width as f64).ceil()) as usize + 2 // to acoomodate statusline and commandline } else { 0 } }; Vec2::new(width, height) } fn take_focus(&mut self, _: Direction) -> bool { false } fn on_event(&mut self, e: Event) -> EventResult { match self.file_event_recv.try_recv() { Ok(DebouncedEvent::Write(_)) => { let read_from_file = |file: PathBuf| -> Vec> { if let Ok(ref mut f) = File::open(file) { let mut j = String::new(); f.read_to_string(&mut j); return serde_json::from_str(&j).unwrap(); } else { return Vec::new(); } }; let auto = read_from_file(utils::auto_habit_file()); self.habits.retain(|x| !x.is_auto()); self.habits.extend(auto); } _ => {} }; match e { Event::Key(Key::Right) | Event::Key(Key::Tab) | Event::Char('l') => { self.set_focus(Absolute::Right); return EventResult::Consumed(None); } Event::Key(Key::Left) | Event::Shift(Key::Tab) | Event::Char('h') => { self.set_focus(Absolute::Left); return EventResult::Consumed(None); } Event::Key(Key::Up) | Event::Char('k') => { self.set_focus(Absolute::Up); return EventResult::Consumed(None); } Event::Key(Key::Down) | Event::Char('j') => { self.set_focus(Absolute::Down); return EventResult::Consumed(None); } Event::Char('d') => { if self.habits.is_empty() { return EventResult::Consumed(None); } self.habits.remove(self.focus); self.focus = self.focus.checked_sub(1).unwrap_or(0); return EventResult::Consumed(None); } Event::Char('w') => { // helper bind to test write to file let j = serde_json::to_string_pretty(&self.habits).unwrap(); let mut file = File::create("foo.txt").unwrap(); file.write_all(j.as_bytes()).unwrap(); return EventResult::Consumed(None); } Event::Char('q') => { self.save_state(); return EventResult::with_cb(|s| s.quit()); } Event::Char('v') => { if self.habits.is_empty() { return EventResult::Consumed(None); } if self.habits[self.focus].view_mode() == ViewMode::Week { self.set_mode(ViewMode::Day) } else { self.set_mode(ViewMode::Week) } return EventResult::Consumed(None); } Event::Char('V') => { for habit in self.habits.iter_mut() { habit.set_view_mode(ViewMode::Week); } return EventResult::Consumed(None); } Event::Key(Key::Esc) => { for habit in self.habits.iter_mut() { habit.set_view_mode(ViewMode::Day); } return EventResult::Consumed(None); } /* We want sifting to be an app level function, * that later trickles down into each habit * */ Event::Char(']') => { self.sift_forward(); return EventResult::Consumed(None); } Event::Char('[') => { self.sift_backward(); return EventResult::Consumed(None); } Event::Char('}') => { self.set_view_month_offset(0); return EventResult::Consumed(None); } /* Every keybind that is not caught by App trickles * down to the focused Habit We sift back to today * before performing any action, "refocusing" the cursor * */ _ => { if self.habits.is_empty() { return EventResult::Ignored; } self.set_view_month_offset(0); self.habits[self.focus].on_event(e) } } } }