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//! Types for the [`m.dummy`] event.
//!
//! [`m.dummy`]: https://spec.matrix.org/latest/client-server-api/#mdummy
use std::fmt;
use ruma_macros::EventContent;
use serde::{
de::{self, Deserialize, Deserializer},
ser::{Serialize, SerializeStruct as _, Serializer},
};
/// The content of an `m.dummy` event.
///
/// This event is used to indicate new Olm sessions for end-to-end encryption.
///
/// Typically it is encrypted as an `m.room.encrypted` event, then sent as a to-device event.
///
/// The event does not have any content associated with it. The sending client is expected to
/// send a key share request shortly after this message, causing the receiving client to process
/// this `m.dummy` event as the most recent event and using the keyshare request to set up the
/// session. The keyshare request and `m.dummy` combination should result in the original sending
/// client receiving keys over the newly established session.
#[derive(Clone, Debug, Default, EventContent)]
#[allow(clippy::exhaustive_structs)]
#[ruma_event(type = "m.dummy", kind = ToDevice)]
pub struct ToDeviceDummyEventContent;
impl ToDeviceDummyEventContent {
/// Create a new `ToDeviceDummyEventContent`.
pub fn new() -> Self {
Self
}
}
impl<'de> Deserialize<'de> for ToDeviceDummyEventContent {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
struct Visitor;
impl<'de> de::Visitor<'de> for Visitor {
type Value = ToDeviceDummyEventContent;
fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
formatter.write_str("a struct")
}
fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
where
A: de::MapAccess<'de>,
{
while map.next_entry::<de::IgnoredAny, de::IgnoredAny>()?.is_some() {}
Ok(ToDeviceDummyEventContent)
}
}
deserializer.deserialize_struct("ToDeviceDummyEventContent", &[], Visitor)
}
}
impl Serialize for ToDeviceDummyEventContent {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
serializer.serialize_struct("ToDeviceDummyEventContent", 0)?.end()
}
}