presence: PresenceFull newtype

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

src/main.rs

@@ -22,6 +22,7 @@ mod component;
 mod error;
 mod handlers;
 mod occupant;
+mod presence;
 mod room;
 mod session;
 

src/presence.rs

@@ -0,0 +1,46 @@
+// Copyright (C) 2022-2099 The crate authors.
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published by the
+// Free Software Foundation, either version 3 of the License, or (at your
+// option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License
+// for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+use crate::error::Error;
+use std::convert::TryFrom;
+use std::ops::Deref;
+use xmpp_parsers::{presence::Presence, Jid};
+
+/// Presence that has a FullJid as destination (to).
+#[derive(Debug, Clone, PartialEq)]
+pub struct PresenceFull(Presence);
+
+impl TryFrom<Presence> for PresenceFull {
+    type Error = Error;
+
+    fn try_from(presence: Presence) -> Result<Self, Self::Error> {
+        match (&presence.from, &presence.to) {
+            (Some(Jid::Full(_)), Some(Jid::Full(_))) => (),
+            (Some(Jid::Full(_)), _) => return Err(Error::InvalidDestinationJid),
+            (_, Some(Jid::Full(_))) => return Err(Error::InvalidOriginJid),
+            _ => return Err(Error::InvalidOriginJid),
+        }
+
+        Ok(Self(presence))
+    }
+}
+
+impl Deref for PresenceFull {
+    type Target = Presence;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}