public/subjects/events

events

Instructions

You have to design a notification system for a platform.

Depending on the type of event, your event handler will control the size, color and position of the notification.

Create a method named notify which returns a Notification with the following characteristics for each of:

• Remainder(text):
  • size: 50
  • color: (50, 50, 50)
  • position: Bottom
  • content: the text associated to the enum variant
• Registration(chrono::Duration):
  • size: 30
  • color: (255, 2, 22)
  • position: Top
  • content: "You have {duration} left before the registration ends"
• Appointment(text):
  • size: 100
  • color: (200, 200, 3)
  • position: Center
  • content: text associated to the value
• Holiday:
  • size: 25
  • color: (0, 255, 0)
  • position: Top
  • content: "Enjoy your holiday"

duration must be displayed in the form of {hours}H:{minutes}M:{seconds}S. The time will represent the remaining time before the event starts. For example, if there are 13 hours, 38 minutes and 14 seconds left, then the content will be "You have 13H:38M:14S left before the registration ends"

Implement the std::fmt::Display trait so the text of the notifications are printed in the right color in the command line.

Dependencies

chrono = "0.4"

colored = "2.0.0"

Expected Functions and Data Structures

use chrono::Duration;
use colored::*;

#[derive(Debug, Eq, PartialEq)]
pub enum Position {
	Top,
	Bottom,
	Center,
}

#[derive(Debug, Eq, PartialEq)]
 pub struct Notification {
	pub size: u32,
	pub color: (u8, u8, u8),
	pub position: Position,
	pub content: String,
}

#[derive(Debug)]
pub enum Event<'a> {
	Remainder(&'a str),
	Registration(Duration),
	Appointment(&'a str),
	Holiday,
}

use std::fmt;

impl fmt::Display for Notification {
}

use Event::*;

impl Event {
	pub fn notify(&self) -> Notification {
	}
}

Usage

Here is a program to test your function.

use events::Event::*;
use chrono::Duration;

fn main() {
	let remainder = Remainder("Go to the doctor");
	println!("{}", remainder.notify());
	let registration = Registration(Duration::seconds(49094));
	println!("{}", registration.notify());
	let appointment = Appointment("Go to the doctor");
	println!("{}", appointment.notify());
	let holiday = Holiday;
	println!("{}", holiday.notify());
}

And its output

$ cargo run
(Bottom, 50, Go to the doctor)
(Top, 30, You have 13H:38M:14S left before the registration ends)
(Center, 100, Go to the doctor)
(Top, 25, Enjoy your holiday)
$

Notions

• colored crate
• chrono crate