From 6e235aa67e5a9c98b0bd236a7efecfcfb88bcc32 Mon Sep 17 00:00:00 2001
From: Mylloon <kennel.anri@tutanota.com>
Date: Tue, 16 Aug 2022 11:54:47 +0200
Subject: [PATCH] export calendar as .ics

---
 src/ics.rs | 47 +++++++++++++++++++++++++++--------------------
 1 file changed, 27 insertions(+), 20 deletions(-)

diff --git a/src/ics.rs b/src/ics.rs
index 8287691..e948dc8 100644
--- a/src/ics.rs
+++ b/src/ics.rs
@@ -3,30 +3,37 @@ use ics::{
     Event, ICalendar,
 };
 
-pub fn export(timetable: Vec<String>, filename: &str) {
+pub fn export(courses: Vec<crate::timetable::models::Course>, filename: &str) {
     let mut calendar = ICalendar::new("2.0", "cal8tor");
 
-    // Create event which contains the information regarding the course
-    let mut event = Event::new("uid", "dtstamp");
+    // Create events which contains the information regarding the course
+    for course in courses {
+        let mut event = Event::new("uid", "dtstamp");
 
-    // Add properties
-    // Public event
-    event.push(Class::public());
-    // Consume actual time
-    event.push(Transp::opaque());
-    // Professor's name
-    event.push(Description::new("Jean-Jacques Bourdin"));
-    // Start time of the course
-    event.push(DtStart::new("20220919T123000Z"));
-    // End time of the course
-    event.push(DtEnd::new("20220919T033000Z"));
-    // Room location
-    event.push(Location::new("A188"));
-    // Course's name
-    event.push(Summary::new("Algorithmique avancée"));
+        // Public event
+        event.push(Class::public());
+        // Consume actual time
+        event.push(Transp::opaque());
+        // Professor's name
+        event.push(Description::new(course.professor.unwrap_or_default()));
+        // Start time of the course
+        event.push(DtStart::new(dt_ical(course.dtstart.unwrap())));
+        // End time of the course
+        event.push(DtEnd::new(dt_ical(course.dtend.unwrap())));
+        // Room location
+        event.push(Location::new(course.room));
+        // Course's name
+        event.push(Summary::new(course.name));
 
-    // Add the course to the calendar
-    calendar.add_event(event);
+        // Add the course to the calendar
+        calendar.add_event(event);
+    }
 
     calendar.save_file(filename).unwrap();
 }
+
+/// Transform the datetime from chrono to the ICS format
+/// See https://github.com/hummingly/ics/issues/17#issue-985662287
+fn dt_ical(dt: chrono::DateTime<chrono::Utc>) -> String {
+    format!("{}", dt.format("%Y%m%dT%H%M%SZ"))
+}