iCalendar in Rust

A builder and parser for rfc5545 iCalendar.

You want to help make this more mature? Please talk to me, Pull Requests and suggestions are very welcome.

Examples

Below are two examples of how to use this library. See the examples directory as well as the documentation for many more.

Building a new Calendar

Use the builder-pattern to assemble the full calendar or event by event. Display printing produces the rfc5545 format.

use icalendar::{Calendar, CalendarDateTime, Class, Component, Event, EventLike, Property, Todo};
use chrono::{Duration, NaiveDate, NaiveTime, Utc};

// let's create a calendar
let my_calendar = Calendar::new()
    .name("example calendar")
    .push(
        // add an event
        Event::new()
            .summary("test event")
            .description("here I have something really important to do")
            .starts(Utc::now())
            .class(Class::Confidential)
            .ends(Utc::now() + Duration::days(1))
            .append_property(
                Property::new("TEST", "FOOBAR")
                    .add_parameter("IMPORTANCE", "very")
                    .add_parameter("DUE", "tomorrow")
            )
    )
    .push(
        // add a todo
        Todo::new()
            .summary("groceries")
            .description("Buy some milk")
    )
    .push(
        // add an all-day event
        Event::new()
            .all_day(NaiveDate::from_ymd_opt(2016, 3, 15).unwrap())
            .summary("My Birthday")
            .description("Hey, I'm gonna have a party\nBYOB: Bring your own beer.\nHendrik")
    )
    .push(
        // event with utc timezone
        Event::new()
            .starts(CalendarDateTime::from(
                NaiveDate::from_ymd_opt(2024, 10, 24).unwrap()
                    .and_time(NaiveTime::from_hms_opt(20, 10, 00).unwrap())
                    .and_utc()
            ))
            .summary("Birthday Party")
            .description("I'm gonna have a party\nBYOB: Bring your own beer.\nHendrik")
    )
    .done();

println!("{}", my_calendar);

Removing Properties from Components

You can remove properties from components when you need to update their state:

use icalendar::{Calendar, Component, Event, EventStatus, Todo, TodoStatus};
use chrono::Utc;

// Create a completed todo
let mut todo = Todo::new();
todo
    .summary("Buy milk")
    .completed(Utc::now())
    .percent_complete(100)
    .status(TodoStatus::Completed);

// Later, mark it as uncompleted by removing completion properties
todo.mark_uncompleted();
// This removes COMPLETED, PERCENT-COMPLETE, and STATUS properties

// For events, you can remove specific properties
let mut event = Event::new();
event
    .summary("Team Meeting")
    .status(EventStatus::Cancelled);

// Remove the cancelled status
event.remove_status();

// You can also remove any property directly
event.remove_property("LOCATION");

Parsing a Calendar

There is a feature called "parser" which allows you to read calendars again like this:

use std::fs::read_to_string;

use icalendar::{Calendar, CalendarComponent, Component};

let contents = read_to_string("fixtures/icalendar-rb/event.ics").unwrap();

let parsed_calendar: Calendar = contents.parse().unwrap();

for component in &parsed_calendar.components {
    if let CalendarComponent::Event(event) = component {
        println!("Event: {}", event.get_summary().unwrap())
    }
}

Structure

A [Calendar] represents a full calendar, which contains multiple [Component]s. These may be either [Event]s, [Todo]s, or [Venue]s. Components in turn have [Property]s, which may have [Parameter]s.

License

Icalendar (this crate) is licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Any help in form of descriptive and friendly issues or comprehensive pull requests are welcome!

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in icalendar by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

Thanks goes to these wonderful people: