Calendar data model: Switch to only saving timezone id

crates/store/Cargo.toml

@@ -32,6 +32,7 @@ headers.workspace = true
 tower.workspace = true
 futures-core.workspace = true
 tower-sessions.workspace = true
+vtimezones-rs.workspace = true
 
 [dev-dependencies]
 rstest = { workspace = true }

crates/store/src/calendar.rs

@@ -1,3 +1,5 @@
+use std::str::FromStr;
+
 use crate::synctoken::format_synctoken;
 use chrono::NaiveDateTime;
 use rustical_ical::CalendarObjectType;
@@ -11,7 +13,6 @@ pub struct Calendar {
     pub order: i64,
     pub description: Option<String>,
     pub color: Option<String>,
-    pub timezone: Option<String>,
     pub timezone_id: Option<String>,
     pub deleted_at: Option<NaiveDateTime>,
     pub synctoken: i64,
@@ -24,4 +25,16 @@ impl Calendar {
     pub fn format_synctoken(&self) -> String {
         format_synctoken(self.synctoken)
     }
+
+    pub fn get_timezone(&self) -> Option<chrono_tz::Tz> {
+        self.timezone_id
+            .as_ref()
+            .and_then(|tzid| chrono_tz::Tz::from_str(tzid).ok())
+    }
+
+    pub fn get_vtimezone(&self) -> Option<&'static str> {
+        self.timezone_id
+            .as_ref()
+            .and_then(|tzid| vtimezones_rs::VTIMEZONES.get(tzid).cloned())
+    }
 }

crates/store/src/contact_birthday_store.rs

@@ -20,7 +20,6 @@ fn birthday_calendar(addressbook: Addressbook) -> Calendar {
         order: 0,
         description: None,
         color: None,
-        timezone: None,
         timezone_id: None,
         deleted_at: addressbook.deleted_at,
         synctoken: addressbook.synctoken,