common: Add replacement to Relations

crates/ruma-common/src/events/relation.rs

@@ -5,7 +5,7 @@ use std::fmt::Debug;
 use js_int::UInt;
 use serde::{Deserialize, Serialize};
 
-use crate::MilliSecondsSinceUnixEpoch;
+use crate::{EventId, MilliSecondsSinceUnixEpoch, UserId};
 
 /// Summary of all reactions with the given key to an event.
 #[derive(Clone, Debug, Default, Deserialize, PartialEq, Eq, Serialize)]
@@ -67,6 +67,30 @@ impl AnnotationChunk {
     }
 }
 
+/// A bundled replacement.
+#[derive(Clone, Debug, Deserialize, Serialize)]
+#[cfg(feature = "unstable-msc2676")]
+#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
+pub struct BundledReplacement {
+    /// The ID of the replacing event.
+    pub event_id: Box<EventId>,
+
+    /// The user ID of the sender of the latest replacement.
+    pub sender: Box<UserId>,
+
+    /// Timestamp in milliseconds on originating homeserver when the latest replacement was sent.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub origin_server_ts: Option<MilliSecondsSinceUnixEpoch>,
+}
+
+#[cfg(feature = "unstable-msc2676")]
+impl BundledReplacement {
+    /// Creates a new `BundledReplacement` with the given event ID and sender.
+    pub fn new(event_id: Box<EventId>, sender: Box<UserId>) -> Self {
+        Self { event_id, sender, origin_server_ts: None }
+    }
+}
+
 /// Precompiled list of relations to this event grouped by relation type.
 #[derive(Clone, Debug, Default, Deserialize, Serialize)]
 #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
@@ -75,6 +99,11 @@ pub struct Relations {
     #[cfg(feature = "unstable-msc2677")]
     #[serde(rename = "m.annotation")]
     pub annotation: Option<AnnotationChunk>,
+
+    /// Replacement relation.
+    #[cfg(feature = "unstable-msc2676")]
+    #[serde(rename = "m.replace")]
+    pub replace: Option<BundledReplacement>,
 }
 
 impl Relations {