Fix Calendar: Uppercase MAILTO calendar addresses become invalid SMTP recipients

crates/groupware/src/calendar/index.rs

@@ -8,9 +8,12 @@ use super::{
     ArchivedCalendar, ArchivedCalendarEvent, ArchivedCalendarPreferences, ArchivedDefaultAlert,
     ArchivedTimezone, Calendar, CalendarEvent, CalendarPreferences, DefaultAlert, Timezone,
 };
-use crate::calendar::{
-    ArchivedCalendarEventNotification, ArchivedChangedBy, ArchivedEventPreferences,
-    CalendarEventNotification, ChangedBy, EventPreferences,
+use crate::{
+    calendar::{
+        ArchivedCalendarEventNotification, ArchivedChangedBy, ArchivedEventPreferences,
+        CalendarEventNotification, ChangedBy, EventPreferences,
+    },
+    strip_mailto_scheme,
 };
 use ahash::AHashSet;
 use calcard::icalendar::{
@@ -463,7 +466,7 @@ impl ArchivedCalendarEvent {
                             _ => None,
                         }))
                     {
-                        let value = value.strip_prefix("mailto:").unwrap_or(value).trim();
+                        let value = strip_mailto_scheme(value);
                         let lang = if is_lang {
                             detector.detect(value, MIN_LANGUAGE_SCORE);
                             Language::Unknown

crates/groupware/src/lib.rs

@@ -149,3 +149,10 @@ impl DavCalendarResource for DavResources {
             .map(|p| p.tz)
     }
 }
+
+pub fn strip_mailto_scheme(value: &str) -> &str {
+    value
+        .split_once(':')
+        .filter(|(scheme, _)| scheme.eq_ignore_ascii_case("mailto"))
+        .map_or(value, |(_, address)| address.trim())
+}

crates/groupware/src/scheduling/mod.rs

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
  */
 
+use crate::strip_mailto_scheme;
 use ahash::{AHashMap, AHashSet};
 use calcard::{
     common::{IanaString, PartialDateTime},
@@ -238,7 +239,7 @@ impl Attendee<'_> {
 impl Email {
     pub fn new(email: &str, local_addresses: &[String]) -> Option<Self> {
         email.contains('@').then(|| {
-            let email = email.trim().trim_start_matches("mailto:").to_lowercase();
+            let email = strip_mailto_scheme(email.trim()).to_lowercase();
             let is_local = local_addresses.contains(&email);
             Email { email, is_local }
         })