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events: Rework Relation serde

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Relation types now implement `Deserialize`, `Serialize`.
This commit is contained in:
Jonas Platte 2021-08-21 15:20:15 +02:00
parent 06f8b81ace
commit a81880c68f
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GPG Key ID: CC154DE0E30B7C67
6 changed files with 118 additions and 124 deletions
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6
crates/ruma-events/CHANGELOG.md
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@ -3,6 +3,12 @@
Improvements:
* Add `From` implementations for event and event content enums
* It's now an error for a `room::message::Relation` to be `Replaces` without
there being `new_content`
* Previously, this used to set the relation to `None`
* Unsupported relations are now deserialized to `relates_to: Some(_)` instead of
`None`
* It's not possible to inspect the inner value though
# 0.24.4

7
crates/ruma-events/src/room/encrypted.rs
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@ -33,7 +33,7 @@ pub struct EncryptedEventContent {
/// Information about related messages for [rich replies].
///
/// [rich replies]: https://matrix.org/docs/spec/client_server/r0.6.1#rich-replies
#[serde(flatten, with = "relation_serde", skip_serializing_if = "Option::is_none")]
#[serde(flatten, skip_serializing_if = "Option::is_none")]
pub relates_to: Option<Relation>,
}
@ -91,6 +91,7 @@ pub enum EncryptedEventScheme {
///
/// Outside of the encrypted payload to support server aggregation.
#[derive(Clone, Debug)]
#[allow(clippy::manual_non_exhaustive)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub enum Relation {
/// An `m.in_reply_to` relation indicating that the event is a reply to another event.
@ -113,6 +114,9 @@ pub enum Relation {
#[cfg(feature = "unstable-pre-spec")]
#[cfg_attr(docsrs, doc(cfg(feature = "unstable-pre-spec")))]
Annotation(Annotation),
#[doc(hidden)]
_Custom,
}
/// The event this relation belongs to replaces another event.
@ -263,6 +267,7 @@ impl From<message::Relation> for Relation {
message::Relation::Replacement(re) => {
Self::Replacement(Replacement { event_id: re.event_id })
}
message::Relation::_Custom => Self::_Custom,
}
}
}

72
crates/ruma-events/src/room/encrypted/relation_serde.rs
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@ -1,77 +1,69 @@
use serde::{ser::SerializeStruct as _, Deserialize, Deserializer, Serialize, Serializer};
use serde::{Deserialize, Deserializer, Serialize, Serializer};
#[cfg(feature = "unstable-pre-spec")]
use super::{Annotation, Reference, Replacement};
use super::{InReplyTo, Relation};
pub fn deserialize<'de, D>(deserializer: D) -> Result<Option<Relation>, D::Error>
where
impl<'de> Deserialize<'de> for Relation {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
fn convert_relation(ev: EventWithRelatesToJsonRepr) -> Option<Relation> {
{
fn convert_relation(ev: EventWithRelatesToJsonRepr) -> Relation {
if let Some(in_reply_to) = ev.relates_to.in_reply_to {
return Some(Relation::Reply { in_reply_to });
return Relation::Reply { in_reply_to };
}
#[cfg(feature = "unstable-pre-spec")]
if let Some(relation) = ev.relates_to.relation {
let relation = match relation {
return match relation {
RelationJsonRepr::Annotation(a) => Relation::Annotation(a),
RelationJsonRepr::Reference(r) => Relation::Reference(r),
RelationJsonRepr::Replacement(Replacement { event_id }) => {
Relation::Replacement(Replacement { event_id })
}
// FIXME: Maybe we should log this, though at this point we don't even have access
// to the rel_type of the unknown relation.
RelationJsonRepr::Unknown => return None,
// FIXME: Maybe we should log this, though at this point we don't even have
// access to the rel_type of the unknown relation.
RelationJsonRepr::Unknown => Relation::_Custom,
};
return Some(relation);
}
None
Relation::_Custom
}
EventWithRelatesToJsonRepr::deserialize(deserializer).map(convert_relation)
}
}
pub fn serialize<S>(relation: &Option<Relation>, serializer: S) -> Result<S::Ok, S::Error>
where
impl Serialize for Relation {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let relation = match relation {
Some(rel) => rel,
// FIXME: If this crate ends up depending on tracing, emit a warning here.
// This code path should not be reachable due to the skip_serializing_if serde attribute
// that should be applied together with `with = "relation_serde"`.
None => return serializer.serialize_struct("NoRelation", 0)?.end(),
};
let json_repr = match relation {
{
let relates_to = match self {
#[cfg(feature = "unstable-pre-spec")]
Relation::Annotation(r) => EventWithRelatesToJsonRepr::new(RelatesToJsonRepr {
Relation::Annotation(r) => RelatesToJsonRepr {
relation: Some(RelationJsonRepr::Annotation(r.clone())),
..Default::default()
}),
},
#[cfg(feature = "unstable-pre-spec")]
Relation::Reference(r) => EventWithRelatesToJsonRepr::new(RelatesToJsonRepr {
Relation::Reference(r) => RelatesToJsonRepr {
relation: Some(RelationJsonRepr::Reference(r.clone())),
..Default::default()
}),
},
#[cfg(feature = "unstable-pre-spec")]
Relation::Replacement(r) => EventWithRelatesToJsonRepr {
relates_to: RelatesToJsonRepr {
Relation::Replacement(r) => RelatesToJsonRepr {
relation: Some(RelationJsonRepr::Replacement(r.clone())),
..Default::default()
},
},
Relation::Reply { in_reply_to } => EventWithRelatesToJsonRepr::new(RelatesToJsonRepr {
in_reply_to: Some(in_reply_to.clone()),
..Default::default()
}),
Relation::Reply { in_reply_to } => {
RelatesToJsonRepr { in_reply_to: Some(in_reply_to.clone()), ..Default::default() }
}
Relation::_Custom => RelatesToJsonRepr::default(),
};
json_repr.serialize(serializer)
EventWithRelatesToJsonRepr { relates_to }.serialize(serializer)
}
}
#[derive(Deserialize, Serialize)]
@ -80,12 +72,6 @@ struct EventWithRelatesToJsonRepr {
relates_to: RelatesToJsonRepr,
}
impl EventWithRelatesToJsonRepr {
fn new(relates_to: RelatesToJsonRepr) -> Self {
Self { relates_to }
}
}
/// Enum modeling the different ways relationships can be expressed in a `m.relates_to` field of an
/// event.
#[derive(Default, Deserialize, Serialize)]

6
crates/ruma-events/src/room/message.rs
View File

@ -41,7 +41,7 @@ pub struct MessageEventContent {
/// Information about related messages for [rich replies].
///
/// [rich replies]: https://matrix.org/docs/spec/client_server/r0.6.1#rich-replies
#[serde(flatten, with = "relation_serde", skip_serializing_if = "Option::is_none")]
#[serde(flatten, skip_serializing_if = "Option::is_none")]
pub relates_to: Option<Relation>,
}
@ -265,6 +265,7 @@ impl From<MessageType> for MessageEventContent {
///
/// Currently used for replies and editing (message replacement).
#[derive(Clone, Debug)]
#[allow(clippy::manual_non_exhaustive)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub enum Relation {
/// An `m.in_reply_to` relation indicating that the event is a reply to another event.
@ -277,6 +278,9 @@ pub enum Relation {
#[cfg(feature = "unstable-pre-spec")]
#[cfg_attr(docsrs, doc(cfg(feature = "unstable-pre-spec")))]
Replacement(Replacement),
#[doc(hidden)]
_Custom,
}
/// Information about the event a "rich reply" is replying to.

12
crates/ruma-events/src/room/message/content_serde.rs
View File

@ -3,10 +3,8 @@
use serde::{de, Deserialize};
use serde_json::value::RawValue as RawJsonValue;
use crate::{
from_raw_json_value,
room::message::{MessageEventContent, MessageType},
};
use super::{MessageEventContent, MessageType, Relation};
use crate::from_raw_json_value;
impl<'de> Deserialize<'de> for MessageEventContent {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
@ -15,10 +13,10 @@ impl<'de> Deserialize<'de> for MessageEventContent {
{
let json = Box::<RawJsonValue>::deserialize(deserializer)?;
let mut deserializer = serde_json::Deserializer::from_str(json.get());
let relation =
super::relation_serde::deserialize(&mut deserializer).map_err(de::Error::custom)?;
let relates_to =
Option::<Relation>::deserialize(&mut deserializer).map_err(de::Error::custom)?;
Ok(Self { msgtype: from_raw_json_value(&json)?, relates_to: relation })
Ok(Self { msgtype: from_raw_json_value(&json)?, relates_to })
}
}

55
crates/ruma-events/src/room/message/relation_serde.rs
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@ -1,6 +1,6 @@
#[cfg(feature = "unstable-pre-spec")]
use ruma_identifiers::EventId;
use serde::{ser::SerializeStruct as _, Deserialize, Deserializer, Serialize, Serializer};
use serde::{Deserialize, Deserializer, Serialize, Serializer};
#[cfg(feature = "unstable-pre-spec")]
use super::Replacement;
@ -8,49 +8,42 @@ use super::{InReplyTo, Relation};
#[cfg(feature = "unstable-pre-spec")]
use crate::room::message::MessageEventContent;
pub fn deserialize<'de, D>(deserializer: D) -> Result<Option<Relation>, D::Error>
where
impl<'de> Deserialize<'de> for Relation {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
fn convert_relation(ev: EventWithRelatesToJsonRepr) -> Option<Relation> {
{
let ev = EventWithRelatesToJsonRepr::deserialize(deserializer)?;
if let Some(in_reply_to) = ev.relates_to.in_reply_to {
return Some(Relation::Reply { in_reply_to });
return Ok(Relation::Reply { in_reply_to });
}
#[cfg(feature = "unstable-pre-spec")]
if let Some(relation) = ev.relates_to.relation {
let relation = match relation {
return Ok(match relation {
RelationJsonRepr::Replacement(ReplacementJsonRepr { event_id }) => {
let new_content = ev.new_content?;
let new_content = ev
.new_content
.ok_or_else(|| serde::de::Error::missing_field("m.new_content"))?;
Relation::Replacement(Replacement { event_id, new_content })
}
// FIXME: Maybe we should log this, though at this point we don't even have access
// to the rel_type of the unknown relation.
RelationJsonRepr::Unknown => return None,
};
return Some(relation);
// FIXME: Maybe we should log this, though at this point we don't even have
// access to the rel_type of the unknown relation.
RelationJsonRepr::Unknown => Relation::_Custom,
});
}
None
Ok(Relation::_Custom)
}
EventWithRelatesToJsonRepr::deserialize(deserializer).map(convert_relation)
}
pub fn serialize<S>(relation: &Option<Relation>, serializer: S) -> Result<S::Ok, S::Error>
where
impl Serialize for Relation {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let relation = match relation {
Some(rel) => rel,
// FIXME: If this crate ends up depending on tracing, emit a warning here.
// This code path should not be reachable due to the skip_serializing_if serde attribute
// that should be applied together with `with = "relation_serde"`.
None => return serializer.serialize_struct("NoRelation", 0)?.end(),
};
let json_repr = match relation {
{
let json_repr = match self {
Relation::Reply { in_reply_to } => EventWithRelatesToJsonRepr::new(RelatesToJsonRepr {
in_reply_to: Some(in_reply_to.clone()),
..Default::default()
@ -67,12 +60,14 @@ where
new_content: Some(new_content.clone()),
}
}
Relation::_Custom => EventWithRelatesToJsonRepr::default(),
};
json_repr.serialize(serializer)
}
}
#[derive(Deserialize, Serialize)]
#[derive(Default, Deserialize, Serialize)]
struct EventWithRelatesToJsonRepr {
#[serde(rename = "m.relates_to", default, skip_serializing_if = "RelatesToJsonRepr::is_empty")]
relates_to: RelatesToJsonRepr,