start working on cal

src/model/personal/cal.rs

@@ -0,0 +1,23 @@
+use std::io::Write;
+
+use ics::ICalendar;
+use sqlx::SqlitePool;
+
+use crate::model::{event::Event, trip::Trip, user::User};
+
+pub(crate) async fn get_personal_cal(db: &SqlitePool, user: &User) -> String {
+    let mut calendar = ICalendar::new("2.0", "ics-rs");
+
+    let events = Event::all_with_user(db, user).await;
+    for event in events {
+        calendar.add_event(event.get_vevent(db).await);
+    }
+
+    let trips = Trip::all_with_user(db, user).await;
+    for trip in trips {
+        calendar.add_event(trip.get_vevent(db).await);
+    }
+    let mut buf = Vec::new();
+    write!(&mut buf, "{}", calendar).unwrap();
+    String::from_utf8(buf).unwrap()
+}