feat: add icalendar

__misc/icalendar/src/main.rs

@@ -0,0 +1,41 @@
+use chrono::{Duration, NaiveDate, Utc};
+use icalendar::{Calendar, Class, Component, Event, Property, Todo};
+
+fn main() {
+    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")
+                        .done(),
+                )
+                .done(),
+        )
+        .push(
+            // add a todo
+            Todo::new()
+                .summary("groceries")
+                .description("Buy some milk")
+                .done(),
+        )
+        .push(
+            // add an all-day event
+            Event::new()
+                .all_day(NaiveDate::from_ymd(2016, 3, 15))
+                .summary("My Birthday")
+                .description("Hey, I'm gonna have a party\nBYOB: Bring your own beer.\nHendrik")
+                .done(),
+        )
+        .done();
+
+    println!("{}", my_calendar);
+}