use crate::{database::DatabaseGuard, pdu::PduBuilder, utils, ConduitResult, Error, Ruma};
use ruma::{
api::client::{
error::ErrorKind,
r0::message::{get_message_events, send_message_event},
},
events::EventType,
};
use std::{
collections::{BTreeMap, HashSet},
convert::TryInto,
sync::Arc,
};
#[cfg(feature = "conduit_bin")]
use rocket::{get, put};
/// # `PUT /_matrix/client/r0/rooms/{roomId}/send/{eventType}/{txnId}`
///
/// Send a message event into the room.
///
/// - Is a NOOP if the txn id was already used before and returns the same event id again
/// - The only requirement for the content is that it has to be valid json
/// - Tries to send the event into the room, auth rules will determine if it is allowed
#[cfg_attr(
feature = "conduit_bin",
put("/_matrix/client/r0/rooms/<_>/send/<_>/<_>", data = "<body>")
)]
#[tracing::instrument(skip(db, body))]
pub async fn send_message_event_route(
db: DatabaseGuard,
body: Ruma<send_message_event::Request<'_>>,
) -> ConduitResult<send_message_event::Response> {
let sender_user = body.sender_user.as_ref().expect("user is authenticated");
let sender_device = body.sender_device.as_deref();
let mutex_state = Arc::clone(
db.globals
.roomid_mutex_state
.write()
.unwrap()
.entry(body.room_id.clone())
.or_default(),
);
let state_lock = mutex_state.lock().await;
// Forbid m.room.encrypted if encryption is disabled
if &body.event_type == "m.room.encrypted" && !db.globals.allow_encryption() {
return Err(Error::BadRequest(
ErrorKind::Forbidden,
"Encryption has been disabled",
));
}
// Check if this is a new transaction id
if let Some(response) =
db.transaction_ids
.existing_txnid(sender_user, sender_device, &body.txn_id)?
{
// The client might have sent a txnid of the /sendToDevice endpoint
// This txnid has no response associated with it
if response.is_empty() {
return Err(Error::BadRequest(
ErrorKind::InvalidParam,
"Tried to use txn id already used for an incompatible endpoint.",
));
}
let event_id = utils::string_from_bytes(&response)
.map_err(|_| Error::bad_database("Invalid txnid bytes in database."))?
.try_into()
.map_err(|_| Error::bad_database("Invalid event id in txnid data."))?;
return Ok(send_message_event::Response { event_id }.into());
}
let mut unsigned = BTreeMap::new();
unsigned.insert("transaction_id".to_owned(), body.txn_id.to_string().into());
let event_id = db.rooms.build_and_append_pdu(
PduBuilder {
event_type: EventType::from(&*body.event_type),
content: serde_json::from_str(body.body.body.json().get())
.map_err(|_| Error::BadRequest(ErrorKind::BadJson, "Invalid JSON body."))?,
unsigned: Some(unsigned),
state_key: None,
redacts: None,
},
sender_user,
&body.room_id,
&db,
&state_lock,
)?;
db.transaction_ids.add_txnid(
sender_user,
sender_device,
&body.txn_id,
event_id.as_bytes(),
)?;
drop(state_lock);
db.flush()?;
Ok(send_message_event::Response::new((*event_id).to_owned()).into())
}
/// # `GET /_matrix/client/r0/rooms/{roomId}/messages`
///
/// Allows paginating through room history.
///
/// - Only works if the user is joined (TODO: always allow, but only show events where the user was
/// joined, depending on history_visibility)
#[cfg_attr(
feature = "conduit_bin",
get("/_matrix/client/r0/rooms/<_>/messages", data = "<body>")
)]
#[tracing::instrument(skip(db, body))]
pub async fn get_message_events_route(
db: DatabaseGuard,
body: Ruma<get_message_events::Request<'_>>,
) -> ConduitResult<get_message_events::Response> {
let sender_user = body.sender_user.as_ref().expect("user is authenticated");
let sender_device = body.sender_device.as_ref().expect("user is authenticated");
if !db.rooms.is_joined(sender_user, &body.room_id)? {
return Err(Error::BadRequest(
ErrorKind::Forbidden,
"You don't have permission to view this room.",
));
}
let from = body
.from
.clone()
.parse()
.map_err(|_| Error::BadRequest(ErrorKind::InvalidParam, "Invalid `from` value."))?;
let to = body.to.as_ref().map(|t| t.parse());
db.rooms
.lazy_load_confirm_delivery(&sender_user, &sender_device, &body.room_id, from)?;
// Use limit or else 10
let limit = body.limit.try_into().map_or(10_usize, |l: u32| l as usize);
let next_token;
let mut resp = get_message_events::Response::new();
let mut lazy_loaded = HashSet::new();
match body.dir {
get_message_events::Direction::Forward => {
let events_after: Vec<_> = db
.rooms
.pdus_after(sender_user, &body.room_id, from)?
.take(limit)
.filter_map(|r| r.ok()) // Filter out buggy events
.filter_map(|(pdu_id, pdu)| {
db.rooms
.pdu_count(&pdu_id)
.map(|pdu_count| (pdu_count, pdu))
.ok()
})
.take_while(|&(k, _)| Some(Ok(k)) != to) // Stop at `to`
.collect();
for (_, event) in &events_after {
if !db.rooms.lazy_load_was_sent_before(
&sender_user,
&sender_device,
&body.room_id,
&event.sender,
)? {
lazy_loaded.insert(event.sender.clone());
}
}
next_token = events_after.last().map(|(count, _)| count).copied();
let events_after: Vec<_> = events_after
.into_iter()
.map(|(_, pdu)| pdu.to_room_event())
.collect();
resp.start = body.from.to_owned();
resp.end = next_token.map(|count| count.to_string());
resp.chunk = events_after;
}
get_message_events::Direction::Backward => {
let events_before: Vec<_> = db
.rooms
.pdus_until(sender_user, &body.room_id, from)?
.take(limit)
.filter_map(|r| r.ok()) // Filter out buggy events
.filter_map(|(pdu_id, pdu)| {
db.rooms
.pdu_count(&pdu_id)
.map(|pdu_count| (pdu_count, pdu))
.ok()
})
.take_while(|&(k, _)| Some(Ok(k)) != to) // Stop at `to`
.collect();
for (_, event) in &events_before {
if !db.rooms.lazy_load_was_sent_before(
&sender_user,
&sender_device,
&body.room_id,
&event.sender,
)? {
lazy_loaded.insert(event.sender.clone());
}
}
next_token = events_before.last().map(|(count, _)| count).copied();
let events_before: Vec<_> = events_before
.into_iter()
.map(|(_, pdu)| pdu.to_room_event())
.collect();
resp.start = body.from.to_owned();
resp.end = next_token.map(|count| count.to_string());
resp.chunk = events_before;
}
}
resp.state = Vec::new();
for ll_id in &lazy_loaded {
if let Some(member_event) =
db.rooms
.room_state_get(&body.room_id, &EventType::RoomMember, ll_id.as_str())?
{
resp.state.push(member_event.to_state_event());
}
}
if let Some(next_token) = next_token {
db.rooms.lazy_load_mark_sent(
&sender_user,
&sender_device,
&body.room_id,
lazy_loaded,
next_token,
);
}
Ok(resp.into())
}