2021-07-14 07:07:08 +00:00
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use crate::{database::DatabaseGuard, ConduitResult, Error, Ruma};
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2020-07-30 16:14:47 +00:00
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use ruma::api::client::{error::ErrorKind, r0::context::get_context};
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2021-07-14 07:07:08 +00:00
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use std::convert::TryFrom;
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2020-07-30 16:14:47 +00:00
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#[cfg(feature = "conduit_bin")]
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use rocket::get;
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2021-08-31 17:14:37 +00:00
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/// # `GET /_matrix/client/r0/rooms/{roomId}/context`
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///
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/// Allows loading room history around an event.
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///
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/// - Only works if the user is joined (TODO: always allow, but only show events if the user was
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/// joined, depending on history_visibility)
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2020-07-30 16:14:47 +00:00
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#[cfg_attr(
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feature = "conduit_bin",
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get("/_matrix/client/r0/rooms/<_>/context/<_>", data = "<body>")
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)]
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2021-02-28 11:41:03 +00:00
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#[tracing::instrument(skip(db, body))]
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2020-10-21 19:28:02 +00:00
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pub async fn get_context_route(
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2021-07-14 07:07:08 +00:00
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db: DatabaseGuard,
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2020-09-08 15:32:03 +00:00
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body: Ruma<get_context::Request<'_>>,
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2020-07-30 16:14:47 +00:00
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) -> ConduitResult<get_context::Response> {
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2020-10-18 18:33:12 +00:00
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let sender_user = body.sender_user.as_ref().expect("user is authenticated");
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2020-07-30 16:14:47 +00:00
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2020-10-18 18:33:12 +00:00
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if !db.rooms.is_joined(sender_user, &body.room_id)? {
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2020-07-30 16:14:47 +00:00
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return Err(Error::BadRequest(
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ErrorKind::Forbidden,
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"You don't have permission to view this room.",
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));
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}
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2021-03-23 11:59:27 +00:00
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let base_pdu_id = db
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.rooms
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.get_pdu_id(&body.event_id)?
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.ok_or(Error::BadRequest(
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ErrorKind::NotFound,
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"Base event id not found.",
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))?;
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let base_token = db.rooms.pdu_count(&base_pdu_id)?;
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2020-07-30 16:14:47 +00:00
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let base_event = db
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.rooms
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2021-03-23 11:59:27 +00:00
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.get_pdu_from_id(&base_pdu_id)?
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2020-07-30 16:14:47 +00:00
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.ok_or(Error::BadRequest(
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ErrorKind::NotFound,
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"Base event not found.",
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))?
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.to_room_event();
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let events_before = db
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.rooms
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2021-09-13 17:45:56 +00:00
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.pdus_until(sender_user, &body.room_id, base_token)?
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2020-07-30 16:14:47 +00:00
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.take(
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u32::try_from(body.limit).map_err(|_| {
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Error::BadRequest(ErrorKind::InvalidParam, "Limit value is invalid.")
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})? as usize
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/ 2,
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)
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.filter_map(|r| r.ok()) // Remove buggy events
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.collect::<Vec<_>>();
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2020-09-17 12:44:47 +00:00
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let start_token = events_before
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.last()
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.and_then(|(pdu_id, _)| db.rooms.pdu_count(pdu_id).ok())
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.map(|count| count.to_string());
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2020-07-30 16:14:47 +00:00
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let events_before = events_before
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.into_iter()
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.map(|(_, pdu)| pdu.to_room_event())
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.collect::<Vec<_>>();
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let events_after = db
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.rooms
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2021-09-13 17:45:56 +00:00
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.pdus_after(sender_user, &body.room_id, base_token)?
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2020-07-30 16:14:47 +00:00
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.take(
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u32::try_from(body.limit).map_err(|_| {
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Error::BadRequest(ErrorKind::InvalidParam, "Limit value is invalid.")
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})? as usize
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/ 2,
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)
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.filter_map(|r| r.ok()) // Remove buggy events
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.collect::<Vec<_>>();
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2020-09-17 12:44:47 +00:00
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let end_token = events_after
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.last()
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.and_then(|(pdu_id, _)| db.rooms.pdu_count(pdu_id).ok())
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.map(|count| count.to_string());
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2020-07-30 16:14:47 +00:00
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let events_after = events_after
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.into_iter()
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.map(|(_, pdu)| pdu.to_room_event())
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.collect::<Vec<_>>();
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2020-08-06 12:29:59 +00:00
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let mut resp = get_context::Response::new();
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resp.start = start_token;
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resp.end = end_token;
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resp.events_before = events_before;
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resp.event = Some(base_event);
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resp.events_after = events_after;
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resp.state = db // TODO: State at event
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.rooms
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.room_state_full(&body.room_id)?
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.values()
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.map(|pdu| pdu.to_state_event())
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.collect();
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Ok(resp.into())
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2020-07-30 16:14:47 +00:00
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}
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