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13
Cargo.toml Normal file
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@ -0,0 +1,13 @@
[package]
name = "todue"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0.86"
chrono = "0.4.38"
clap = { version = "4.5.8", features = ["cargo"] }
crossterm = "0.27.0"
termcolor = "1.4.1"

674
LICENSE Normal file
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@ -0,0 +1,674 @@
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above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# ☑️ todue
Keep track of TODOs and deadlines using an interactive markdown TUI.
---
### Layout preview
This is roughly what the UI looks like in the terminal
```md
Chores
- [x] Get groceries (2024-06-20; 16:00)
- [ ] Do the dishes (2024-06-20; 20:00)
- [ ] Take out the trash (2024-06-20; 21:00)
```

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- [ ] ((2024-06-20 21:00)) Take out the trash
- [x] ((2024-06-20 16:00)) Get groceries
- [ ] ((2024-06-20 20:00)) Do the dishes
- [x] This is an extremely long todo entry without a date and yet it has already been completed. there is no way it will all fit in one line, right? i sure hope that doesn't cause any trouble for the end user.
- [ ] didnt
- [ ] you
- [ ] know
- [ ] you
- [ ] were
- [ ] freaky
- [ ] like
- [ ] that
- [ ] can
- [ ] i
- [ ] pay
- [ ] with
- [ ] mousepay
- [ ] here
- [ ] man
- [ ] tiktok
- [ ] is
- [ ] actually
- [ ] hilarious
- [ ] though
- [ ] there
- [ ] is
- [ ] also
- [ ] some
- [ ] baddies
- [ ] with
- [ ] fat
- [ ] honkers
- [ ] on
- [ ] there
- [ ] that
- [ ] have
- [ ] nice
- [ ] smiles
- [ ] and
- [ ] sometimes
- [ ] personalities
- [ ] oh
- [ ] yeeah
- [ ] baby
- [ ] they
- [ ] are
- [ ] real
- [ ] hot
- [ ] babes
- [ ] i
- [ ] hope
- [ ] to
- [ ] see
- [ ] such
- [ ] nice
- [ ] melons
- [ ] in
- [ ] person
- [ ] one
- [ ] day
- [ ] but
- [ ] for
- [ ] that
- [ ] i
- [ ] would
- [ ] probably
- [ ] need
- [ ] to
- [ ] go
- [ ] outside

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use clap::{command, value_parser, Arg, ArgAction, Command, ValueHint};
pub fn new() -> Command {
command!()
.about("Manage todo lists through a tui/cli via markdown-files!")
.arg(
Arg::new("file")
.help("Markdown file to use")
.action(ArgAction::Set)
.value_name("FILE")
.value_parser(value_parser!(String))
.value_hint(ValueHint::FilePath),
)
}

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use std::{
io::{self, Write},
sync::Mutex,
};
pub struct Log {}
pub struct DropGuard<F>
where
F: Fn(),
{
pub exec_on_drop: F,
}
static LOG_BUFFER: Mutex<String> = Mutex::new(String::new());
impl Log {
pub fn log<S1, S2, S3>(label: S1, message: S2, label_ansi_style_code: S3)
where
S1: ToString,
S2: ToString,
S3: ToString,
{
let mut log_entry = String::new();
log_entry += &label_ansi_style_code.to_string(); // set style
log_entry += &label.to_string();
log_entry += "\x1b[0m"; // reset style
log_entry += &message.to_string();
log_entry += "\r\n";
*LOG_BUFFER.lock().unwrap() += &log_entry;
}
pub fn error_exit_with<S, I>(error_code: I, error_msg: S)
where
S: ToString,
I: Into<i32>,
{
Self::error(error_msg);
Self::flush();
std::process::exit(error_code.into());
}
pub fn error<S>(error_msg: S)
where
S: ToString,
{
Self::log("error: ", error_msg, "\x1b[1;31m"); // red and bold label style
}
pub fn info<S>(info_msg: S)
where
S: ToString,
{
Self::log("info: ", info_msg, "\x1b[1;34m"); // blue and bold label style
}
pub fn warn<S>(warning_msg: S)
where
S: ToString,
{
Self::log("warning: ", warning_msg, "\x1b[1;33m"); // blue and bold label style
}
pub fn flush() {
let _ = write!(&mut io::stderr(), "{}", *LOG_BUFFER.lock().unwrap());
io::stderr().flush().unwrap();
}
}
// unused variants here are ok -> hide warning in debug builds
#[cfg_attr(debug_assertions, allow(dead_code))]
pub enum ErrorCode {
App = 1,
IO = 2,
}
impl From<ErrorCode> for i32 {
fn from(value: ErrorCode) -> Self {
value as Self
}
}
impl<F> Drop for DropGuard<F>
where
F: Fn(),
{
fn drop(&mut self) {
(self.exec_on_drop)()
}
}

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use std::{
fs,
io::{self, Write},
path, process, time,
};
use crossterm::event::{poll, read, Event::*, KeyCode::Char};
mod md;
use md::*;
mod ui;
use ui::*;
mod cli;
mod log;
pub use log::*;
mod tests;
fn main() -> anyhow::Result<()> {
let command = cli::new();
let args = command.clone().get_matches();
let md_file = match args.get_one::<String>("file") {
Some(path) => path,
_ => {
Log::warn("No filename specified -- falling back to `todo.md`");
&"todo.md".to_string()
}
};
if !path::Path::new(md_file).exists() {
Log::error_exit_with(
ErrorCode::IO,
format!("Markdown file `{md_file}` not found. Exiting..."),
);
}
let md = fs::read_to_string(md_file).unwrap();
let document = Document::from_md(md)?;
let mut ui = Ui::init(io::stdout(), document);
let _guard = DropGuard {
exec_on_drop: || {
{
let _ = Ui::init(&mut io::stdout(), Document::default()).deinit();
}
.into()
},
};
loop {
ui.draw()?;
if poll(time::Duration::from_millis(250)).unwrap_or(false) {
if let Ok(Key(k)) = read() {
match k.code {
Char('q') => break,
Char('j') => ui.move_selection(Down)?,
Char('k') => ui.move_selection(Up)?,
Char('J') => ui.move_selected_entry(Down),
Char('K') => ui.move_selected_entry(Up),
Char('G') => ui.move_selection_to_bottom(),
Char('g') => ui.move_selection_to_top(),
Char(' ') => ui.toggle_active_entry(),
Char('s') => ui.cycle_sort_mode(),
Char('Q') => { ui.dont_save_on_quit(); break; },
_ => {}
}
}
}
}
if ui.save_on_quit {
Log::info(format!(
"Writing updated markdown to file `{md_file}` and exiting..."
));
let file = fs::File::create(md_file);
if file.is_err() {
Log::error(format!("Failed to open file for writing: `{md_file}`"));
process::exit(ErrorCode::IO.into());
}
write!(file.unwrap(), "{}", ui.document.to_md()).unwrap_or_else(|e| {
Log::error(format!("Failed to write to file: `{md_file}`: {e}"));
process::exit(ErrorCode::IO.into());
});
}
ui.deinit()?;
Log::flush();
Ok(())
}

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use anyhow::anyhow;
use chrono::NaiveDateTime;
/// a todo-list entry; can be thought of as an abstract representation of a line
/// of markdown in one of the following formats:
/// - without deadline: `"- [ ] Do something"`
/// - with deadline: `"- [ ] (2024-06-20 20:00) Do another thing"`
#[derive(Debug, Default, Clone, PartialEq, Eq)]
pub struct Entry {
pub done: bool,
pub text: String,
pub deadline: Option<NaiveDateTime>,
}
/// a todo-document; can be thought of as an abstract representation of an entire
/// document consisting of `title`, and all of the documents `entries`
#[derive(Debug, Default, Clone, PartialEq, Eq)]
pub struct Document {
pub title: Option<String>,
pub entries: Vec<Entry>,
}
pub trait Markdown {
fn to_md(&self) -> String;
fn from_md(md: String) -> anyhow::Result<Self>
where
Self: Sized;
}
impl Markdown for Entry {
fn to_md(&self) -> String {
let mut md = format!("- [{}] ", if self.done { "x" } else { " " });
if let Some(deadline) = self.deadline {
md += &format!("({}) ", deadline.format("(%Y-%m-%d %H:%M)"));
}
md += &self.text;
md
}
fn from_md(md: String) -> anyhow::Result<Self> {
let mut entry = Entry::default();
#[derive(PartialEq, Eq)]
enum ParseState {
Nothing,
Dash,
BrackOpen,
BrackClose,
Text,
}
use ParseState::*;
let mut state = Nothing;
let mut i = 0;
let mut text = String::new();
while i < md.len() {
match state {
Nothing if &md[i..=i] == "-" => state = Dash,
Dash if &md[i..=i] == "[" => state = BrackOpen,
BrackOpen if &md[i..=i] == "x" => entry.done = true,
BrackOpen if &md[i..=i] == "]" => state = BrackClose,
BrackOpen
if !&md[i..=i]
.chars()
.next()
.unwrap_or(' ')
.is_ascii_whitespace() =>
{
return Err(anyhow!("Invalid character in presumed checkbox. Expected whitespace or 'x', found '{}'", &md[i..=i]));
}
BrackClose if md.len() - i >= "(YYYY-mm-dd HH:MM)".len() => {
let maybe_date = &md[i..i + "(YYYY-mm-dd HH:MM)".len()];
let deadline = NaiveDateTime::parse_from_str(maybe_date, "(%Y-%m-%d %H:%M)");
if maybe_date.chars().any(|c| c.is_alphabetic()) {
state = Text; // if there is any letters, stop trying to parse date
} else {
match deadline {
Ok(deadline) => {
entry.deadline = Some(deadline);
state = Text;
i += "(YYYY-mm-dd HH:MM)".len();
text = String::new();
}
_ => text += &md[i..=i],
}
}
}
Text | BrackClose
if !&md[i..].chars().next().unwrap_or(' ').is_ascii_whitespace() =>
{
text += &md[i..=i];
state = Text;
}
Text if !["\r", "\n"].contains(&&md[i..=i]) => text += &md[i..=i],
_ => {}
}
i += 1;
}
match state {
Text => {
entry.text = text.trim_start().to_string();
Ok(entry)
}
_ => Err(anyhow!("Invalid entry")),
}
}
}
impl Markdown for Document {
fn to_md(&self) -> String {
let mut md = match &self.title {
None => String::new(),
Some(title) => format!("# {}\n", title),
};
if !self.entries.is_empty() {
md += "\n";
for entry in &self.entries {
md += &(entry.to_md() + "\n");
}
}
md
}
fn from_md(md: String) -> anyhow::Result<Self> {
let mut document = Document::default();
for line in md.lines() {
if let Ok(entry) = Entry::from_md(line.to_string()) {
document.entries.push(entry);
}
}
Ok(document)
}
}

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use crate::*;
/// test case: valid markdown, entry not done, not actually a date, date-like entry text
#[test]
fn test_valid_fake_date_not_done_dateless() {
let entry = Entry::from_md("- [ ] (2024-06-what) this should work, kind of".to_string());
dbg!(&entry);
assert_eq!(
entry.unwrap(),
Entry {
done: false,
deadline: None,
text: "(2024-06-what) this should work, kind of".to_string(),
}
);
}
/// test case: valid, weirdly spaced, done with date
#[test]
fn test_valid_weirdly_spaced_done_dated() {
let entry =
Entry::from_md(" - [ x] (2024-06-20 20:30) weirdly spaced but ok".to_string());
assert_eq!(
entry.unwrap(),
Entry {
done: true,
deadline: Some(
chrono::NaiveDateTime::parse_from_str("(2024-06-20 20:30)", "(%Y-%m-%d %H:%M)")
.unwrap()
),
text: "weirdly spaced but ok".to_string(),
}
);
}
// test case: invalid, undefined checkbox fill character 'a'
#[test]
fn test_invalid_bad_checkbox_fill() {
let entry = Entry::from_md("- [a] this shouldn't work".to_string());
dbg!(&entry);
assert!(entry.is_err());
}

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#[cfg(test)]
mod md;

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#![allow(dead_code, unused)] // todo
use crate::*;
use std::cmp::Ordering::*;
use std::io;
use anyhow::{anyhow, Result};
use crossterm::{
cursor::{self, MoveTo, RestorePosition, SavePosition},
execute, queue,
style::{Color, SetBackgroundColor, SetForegroundColor, Stylize},
terminal::{
disable_raw_mode, enable_raw_mode, size, Clear, ClearType::All, EnterAlternateScreen,
LeaveAlternateScreen,
},
};
/// state of the user interface
pub struct Ui<T>
where
T: io::Write,
{
pub active_color_pair: (Color, Color),
pub inactive_color_pair: (Color, Color),
pub inactive_done_color_pair: (Color, Color),
pub header_color_pair: (Color, Color),
pub ostream: T,
pub scrolloff: usize,
pub current_sort_mode: SortMode,
pub document: Document,
pub original_document: Document,
pub width: usize,
pub save_on_quit: bool,
pub height: usize,
pub active_entry_idx: usize,
pub current_scroll_offset: usize,
queue_sort_update: bool
}
impl<T> Ui<T>
where
T: io::Write,
{
/// returns a new `Ui` using `ostream` as its' output stream
/// and sets up terminal state.
pub fn init(ostream: T, document: Document) -> Self {
let (width, height) = size().unwrap();
let (width, height) = (width as usize, height as usize);
let active_color_pair = (Color::Black, Color::Yellow);
let inactive_color_pair = (Color::Reset, Color::Reset);
let inactive_done_color_pair = (Color::DarkGrey, Color::Reset);
let header_color_pair = (Color::Yellow, Color::Reset);
let mut ui = Ui {
active_color_pair,
save_on_quit: true,
inactive_color_pair,
inactive_done_color_pair,
header_color_pair,
current_sort_mode: Default,
active_entry_idx: 0,
scrolloff: 8,
current_scroll_offset: 0,
original_document: document.clone(),
document,
ostream,
width,
height,
queue_sort_update: false,
};
queue!(
ui.ostream,
SavePosition,
EnterAlternateScreen,
Clear(All),
cursor::Hide
);
enable_raw_mode().unwrap_or_else(|e| {
Log::error(format!("IO-error when enabling raw-mode: `{}`", e));
process::exit(ErrorCode::IO.into());
});
ui
}
/// resets terminal state that `Ui::init()` sets
pub fn deinit(&mut self) -> Result<()> {
disable_raw_mode()?;
execute!(
self.ostream,
LeaveAlternateScreen,
RestorePosition,
cursor::Show
)?;
Ok(())
}
/// updates `self.width` and `self.height`.
/// errs if the new dimensions are too small
pub fn update_dimensions(&mut self) -> Result<()> {
let (width, height) = size()?;
self.width = width as usize;
self.height = height as usize;
if height < 4 || width < 45 {
Err(anyhow!(
"ui::update_dimensions: Terminal size too small to display UI"
))
} else {
Ok(())
}
}
pub fn clear(&mut self) -> Result<()> {
queue!(self.ostream, Clear(All), MoveTo(0, 0))?;
Ok(())
}
/// draws the entire ui including unchanged parts
pub fn draw(&mut self) -> Result<()> {
self.update_dimensions()?;
self.update_scroll_offset();
self.clear().unwrap();
self.apply_sort_mode();
self.draw_header();
for (i, entry) in self
.document
.entries
.iter()
.skip(self.current_scroll_offset)
.enumerate()
{
if i >= self.inner_height() {
break;
}
let mut bold = false;
let (fg, bg) = match i == self.active_entry_idx - self.current_scroll_offset {
true => {
bold = true;
self.active_color_pair
}
false if entry.done => self.inactive_done_color_pair,
false => self.inactive_color_pair,
};
queue!(self.ostream, SetForegroundColor(fg), SetBackgroundColor(bg));
let mut line = String::with_capacity(self.width);
if entry.done {
line += " [x] ";
} else {
line += " [ ] ";
}
if let Some(deadline) = entry.deadline {
line += &format!("{}", deadline.format("(%Y-%m-%d %H:%M)"));
} else {
line += &" ".repeat("(YYYY-mm-dd HH:MM)".len());
}
line += " ";
let space = self.width - line.len() - 1;
let mut text = entry.text.clone();
if text.chars().count() > space {
text = text[0..space - 3].to_string() + "... ";
}
line += &text;
let space = self.width - line.len();
line += &" ".repeat(space);
match bold {
true => write!(self.ostream, "{}\r\n", line.bold()),
false => write!(self.ostream, "{}\r\n", line),
};
queue!(
self.ostream,
SetBackgroundColor(Color::Reset),
SetForegroundColor(Color::Reset)
);
}
self.ostream.flush()?;
Ok(())
}
pub fn draw_header(&mut self) {
let (fg, bg) = self.header_color_pair;
queue!(self.ostream, SetForegroundColor(fg), SetBackgroundColor(bg));
let mut line = String::with_capacity(self.width);
line += " [todue] ";
line += &" ".repeat(" [x] (YYYY-mm-dd HH:MM) ".len() - line.len());
line += &self.document.title.clone().unwrap_or("TODO".into());
let space = self.width - line.len();
line += &" ".repeat(space);
write!(self.ostream, "{}\r\n", line);
write!(self.ostream, "{}\r\n", "—".repeat(self.width));
queue!(
self.ostream,
SetForegroundColor(Color::Reset),
SetBackgroundColor(Color::Reset)
);
}
/// update the index of the first *shown* entry using `self.scrolloff`
pub fn update_scroll_offset(&mut self) {
if self.current_scroll_offset + self.scrolloff >= self.active_entry_idx {
let diff = (self.current_scroll_offset + self.scrolloff).abs_diff(self.active_entry_idx);
self.current_scroll_offset = self.current_scroll_offset.saturating_sub(diff);
} else if (self.current_scroll_offset + self.inner_height()).saturating_sub(self.scrolloff) <= self.active_entry_idx {
let diff = (self.current_scroll_offset + self.inner_height()).saturating_sub(self.scrolloff).abs_diff(self.active_entry_idx);
self.current_scroll_offset = (self.current_scroll_offset + diff).min(
self.document
.entries
.len()
.saturating_sub(self.inner_height()),
);
}
}
/// get height in characters excluding header/title
pub fn inner_height(&self) -> usize {
self.height - 3
}
pub fn move_selection(&mut self, dir: MoveDirection) -> Result<()> {
match dir {
Down => {
self.active_entry_idx = (self.active_entry_idx + 1) % self.document.entries.len()
}
Up => {
self.active_entry_idx = ((self.active_entry_idx as isize - 1)
.rem_euclid(self.document.entries.len() as isize))
as usize
}
}
Ok(())
}
pub fn move_selection_to_bottom(&mut self) {
self.active_entry_idx = self.document.entries.len() - 1;
}
pub fn move_selection_to_top(&mut self) {
self.active_entry_idx = 0;
}
pub fn move_selected_entry(&mut self, dir: MoveDirection) {
let swap_idx = match dir {
Down => (self.active_entry_idx + 1) % self.document.entries.len(),
Up => {
((self.active_entry_idx as isize - 1)
.rem_euclid(self.document.entries.len() as isize)) as usize
}
};
self.document.entries.swap(self.active_entry_idx, swap_idx);
self.move_selection(dir);
}
pub fn toggle_active_entry(&mut self) {
let state = self.document.entries[self.active_entry_idx].done;
self.document.entries[self.active_entry_idx].done = !state;
}
pub fn cycle_sort_mode(&mut self) {
self.current_sort_mode = match self.current_sort_mode {
Default => ByDeadlineDescending,
ByDeadlineDescending => ByDeadlineAscending,
ByDeadlineAscending => ByTextAscending,
ByTextAscending => ByTextDescending,
ByTextDescending => Default,
};
self.queue_sort_update = true;
}
pub fn apply_sort_mode(&mut self) {
if self.queue_sort_update {
match self.current_sort_mode {
Default => self.document = self.original_document.clone(),
ByDeadlineDescending => {
self.document.entries.sort_by_key(|entry| entry.deadline);
self.document.entries.reverse();
},
ByDeadlineAscending => self.document.entries.sort_by_key(|entry| entry.deadline),
ByTextAscending => self.document.entries.sort_by_key(|entry| entry.text.to_lowercase()),
ByTextDescending => {
self.document.entries.sort_by_key(|entry| entry.text.to_lowercase());
self.document.entries.reverse();
},
}
self.queue_sort_update = false;
}
}
pub fn dont_save_on_quit(&mut self) {
self.save_on_quit = false;
Log::info("Quitting without saving file...");
}
}
pub enum MoveDirection {
Down,
Up,
}
pub use MoveDirection::*;
pub enum SortMode {
Default,
ByDeadlineDescending,
ByDeadlineAscending,
ByTextAscending,
ByTextDescending,
}
pub use SortMode::*;