rtodo 0.1.3

A very simple to-do list manager
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129

//! # rtodo
//!
//! I wrote this project while I'm learning Rust for practice.
//! I decided to put this project online so that others, like me,
//! who are learning Rust can take some ideas and help me improve this code too.
//!
//! Feel free to open a pull request to improve the code or to
//! add new features and help me learn Rust.

use colored::Colorize;
use rtodo::commands::execute_commands;

use std::process::Command;
use std::sync::{atomic::{AtomicBool, Ordering},Arc};

use rtodo::persistence;
use rtodo::todos::Todo;
use rtodo::{
    add_todo, main_menu, remove_todo, save_and_exit, show_todos, sub_menu, update_todo, user_input,
};

fn main() {
    // Create an atomic variable wrapped in an Arc pointer
    let running = Arc::new(AtomicBool::new(true));

    // Clone pointer for later use
    let first_catch = running.clone();
    let last_catch = running.clone();

    // Create a handler to catch CTRL+C
    ctrlc::set_handler(move || {
        first_catch.store(false, Ordering::SeqCst);
    })
    .expect("Error creating a handler!!!");

    // Create a vector to hold the todos
    let mut todos: Vec<Todo> = vec![];

    // Try reading todos from the file
    if let Ok(vec) = persistence::read_from_file() {
        todos.extend(vec);
    }

    // Get command and execute
    if let Err(e) = execute_commands(&mut todos) {
        println!("Error execute the command!!! {e}");
    }

    // Main loop
    loop {
        // Handler loop
        while running.load(Ordering::SeqCst) {
            // Clear the screen
            Command::new("clear").status().unwrap();

            // Show main menu
            main_menu();

            // Ask user to choose an option
            print!(
                "{}{}",
                "Choose an option ".white().bold(),
                "-> ".green().bold()
            );

            // Check if input from user is valid
            let user = match user_input() {
                Ok(u) => u.trim().to_string(),
                Err(e) => panic!("Error get user input {e}"),
            };

            // Open sub menu / show todos
            if user.contains('1') {
                show_todos(&mut todos);

                // Display the sub menu in a loop
                while let Ok(e) = sub_menu(&mut todos) {
                    // Break if `sub_menu()` returned false
                    if !e {
                        break;
                    }
                    show_todos(&mut todos);
                }
            // add todo
            } else if user.contains('2') {
                if let Err(e) = add_todo(&mut todos) {
                    println!("Error add todo!!! {e}");
                }
            // update todo
            } else if user.contains('3') {
                show_todos(&mut todos);
                if let Err(e) = update_todo(&mut todos) {
                    println!("Error update todo!!! {e}");
                }
            // remove todo
            } else if user.contains('4') {
                show_todos(&mut todos);
                if let Err(e) = remove_todo(&mut todos) {
                    println!("Error remove todo!!! {e}");
                }
            // exit
            } else if user.contains('5') {
                if let Err(e) = persistence::write_to_file(&todos) {
                    println!("Error save to file!!! {e}");
                }
                std::process::exit(0);
            }
        } // End while loop

        print!(
            "{}{}{}",
            "Do you want exit?".red().bold(),
            " [Y/N]".yellow().bold(),
            " -> ".green().bold()
        );

        // Get confirmation from the user
        if let Ok(confirm) = user_input() {
            // Check if the user wants to exit.
            if confirm.trim().eq_ignore_ascii_case("y") {
                // Save and exit
                save_and_exit(&mut todos);
            } else {
                // Write true into the handler
                last_catch.store(true, Ordering::SeqCst);
            }
        }
    } // End main loop
}