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use std::{time::SystemTime, vec::IntoIter};
use matrix_sdk_common::{
events::AnyPossiblyRedactedSyncMessageEvent,
identifiers::{EventId, UserId},
};
use serde::{de, ser, Serialize};
pub trait PossiblyRedactedExt {
fn event_id(&self) -> &EventId;
fn origin_server_ts(&self) -> &SystemTime;
fn sender(&self) -> &UserId;
}
impl PossiblyRedactedExt for AnyPossiblyRedactedSyncMessageEvent {
fn event_id(&self) -> &EventId {
match self {
Self::Regular(e) => e.event_id(),
Self::Redacted(e) => e.event_id(),
}
}
fn origin_server_ts(&self) -> &SystemTime {
match self {
Self::Regular(e) => e.origin_server_ts(),
Self::Redacted(e) => e.origin_server_ts(),
}
}
fn sender(&self) -> &UserId {
match self {
Self::Regular(e) => e.sender(),
Self::Redacted(e) => e.sender(),
}
}
}
const MESSAGE_QUEUE_CAP: usize = 35;
#[derive(Clone, Debug, Default)]
pub struct MessageQueue {
pub(crate) msgs: Vec<AnyPossiblyRedactedSyncMessageEvent>,
}
impl MessageQueue {
pub fn new() -> Self {
Self {
msgs: Vec::with_capacity(45),
}
}
pub fn push(&mut self, msg: AnyPossiblyRedactedSyncMessageEvent) -> bool {
if let Some(latest) = self.msgs.last() {
if msg.origin_server_ts() < latest.origin_server_ts() && self.msgs.len() >= 10 {
return false;
}
}
if self.msgs.iter().all(|old| old.event_id() != msg.event_id()) {
self.msgs.push(msg)
}
if self.msgs.len() > MESSAGE_QUEUE_CAP {
self.msgs.pop();
}
true
}
pub fn iter(&self) -> impl Iterator<Item = &AnyPossiblyRedactedSyncMessageEvent> {
self.msgs.iter()
}
pub fn iter_mut(&mut self) -> impl Iterator<Item = &mut AnyPossiblyRedactedSyncMessageEvent> {
self.msgs.iter_mut()
}
}
impl PartialEq for MessageQueue {
fn eq(&self, other: &MessageQueue) -> bool {
self.msgs
.iter()
.zip(other.msgs.iter())
.all(|(a, b)| a.event_id() == b.event_id())
}
}
impl IntoIterator for MessageQueue {
type Item = AnyPossiblyRedactedSyncMessageEvent;
type IntoIter = IntoIter<Self::Item>;
fn into_iter(self) -> Self::IntoIter {
self.msgs.into_iter()
}
}
pub(crate) mod ser_deser {
use std::fmt;
use super::*;
struct MessageQueueDeserializer;
impl<'de> de::Visitor<'de> for MessageQueueDeserializer {
type Value = MessageQueue;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("an array of message events")
}
fn visit_seq<S>(self, mut access: S) -> Result<Self::Value, S::Error>
where
S: de::SeqAccess<'de>,
{
let mut msgs = Vec::with_capacity(access.size_hint().unwrap_or(0));
while let Some(msg) = access.next_element::<AnyPossiblyRedactedSyncMessageEvent>()? {
msgs.push(msg);
}
Ok(MessageQueue { msgs })
}
}
pub fn deserialize<'de, D>(deserializer: D) -> Result<MessageQueue, D::Error>
where
D: de::Deserializer<'de>,
{
deserializer.deserialize_seq(MessageQueueDeserializer)
}
pub fn serialize<S>(msgs: &MessageQueue, serializer: S) -> Result<S::Ok, S::Error>
where
S: ser::Serializer,
{
msgs.msgs.serialize(serializer)
}
}
#[cfg(test)]
mod test {
use std::collections::HashMap;
use matrix_sdk_common::{
events::{AnyPossiblyRedactedSyncMessageEvent, AnySyncMessageEvent},
identifiers::{room_id, user_id, RoomId},
};
use matrix_sdk_test::test_json;
#[cfg(target_arch = "wasm32")]
use wasm_bindgen_test::*;
use super::*;
use crate::Room;
#[test]
fn serialize() {
let id = room_id!("!roomid:example.com");
let user = user_id!("@example:example.com");
let mut room = Room::new(&id, &user);
let json: &serde_json::Value = &test_json::MESSAGE_TEXT;
let msg = AnyPossiblyRedactedSyncMessageEvent::Regular(
serde_json::from_value::<AnySyncMessageEvent>(json.clone()).unwrap(),
);
let mut msgs = MessageQueue::new();
msgs.push(msg.clone());
room.messages = msgs;
let mut joined_rooms = HashMap::new();
joined_rooms.insert(id, room);
assert_eq!(
serde_json::json!({
"!roomid:example.com": {
"room_id": "!roomid:example.com",
"room_name": {
"name": null,
"canonical_alias": null,
"aliases": [],
"heroes": [],
"joined_member_count": null,
"invited_member_count": null
},
"own_user_id": "@example:example.com",
"creator": null,
"direct_target": null,
"joined_members": {},
"invited_members": {},
"messages": [ msg ],
"typing_users": [],
"power_levels": null,
"encrypted": null,
"unread_highlight": null,
"unread_notifications": null,
"tombstone": null
}
}),
serde_json::to_value(&joined_rooms).unwrap()
);
}
#[test]
fn deserialize() {
let id = room_id!("!roomid:example.com");
let user = user_id!("@example:example.com");
let mut room = Room::new(&id, &user);
let json: &serde_json::Value = &test_json::MESSAGE_TEXT;
let msg = AnyPossiblyRedactedSyncMessageEvent::Regular(
serde_json::from_value::<AnySyncMessageEvent>(json.clone()).unwrap(),
);
let mut msgs = MessageQueue::new();
msgs.push(msg.clone());
room.messages = msgs;
let mut joined_rooms = HashMap::new();
joined_rooms.insert(id, room);
let json = serde_json::json!({
"!roomid:example.com": {
"room_id": "!roomid:example.com",
"room_name": {
"name": null,
"canonical_alias": null,
"aliases": [],
"heroes": [],
"joined_member_count": null,
"invited_member_count": null
},
"own_user_id": "@example:example.com",
"creator": null,
"direct_target": null,
"joined_members": {},
"invited_members": {},
"messages": [ msg ],
"typing_users": [],
"power_levels": null,
"encrypted": null,
"unread_highlight": null,
"unread_notifications": null,
"tombstone": null
}
});
assert_eq!(
joined_rooms,
serde_json::from_value::<HashMap<RoomId, Room>>(json).unwrap()
);
}
}