504 lines
17 KiB
Rust
504 lines
17 KiB
Rust
use crate::{
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client_server::invite_helper, database::DatabaseGuard, pdu::PduBuilder, ConduitResult, Error,
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Ruma,
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};
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use log::info;
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use ruma::{
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api::client::{
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error::ErrorKind,
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r0::room::{self, create_room, get_room_event, upgrade_room},
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},
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events::{
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room::{guest_access, history_visibility, join_rules, member, name, topic},
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EventType,
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},
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serde::Raw,
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RoomAliasId, RoomId, RoomVersionId,
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};
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use std::{cmp::max, collections::BTreeMap, convert::TryFrom};
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#[cfg(feature = "conduit_bin")]
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use rocket::{get, post};
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#[cfg_attr(
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feature = "conduit_bin",
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post("/_matrix/client/r0/createRoom", data = "<body>")
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)]
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#[tracing::instrument(skip(db, body))]
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pub async fn create_room_route(
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db: DatabaseGuard,
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body: Ruma<create_room::Request<'_>>,
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) -> ConduitResult<create_room::Response> {
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let sender_user = body.sender_user.as_ref().expect("user is authenticated");
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let room_id = RoomId::new(db.globals.server_name());
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let alias = body
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.room_alias_name
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.as_ref()
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.map_or(Ok(None), |localpart| {
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// TODO: Check for invalid characters and maximum length
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let alias =
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RoomAliasId::try_from(format!("#{}:{}", localpart, db.globals.server_name()))
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.map_err(|_| Error::BadRequest(ErrorKind::InvalidParam, "Invalid alias."))?;
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if db.rooms.id_from_alias(&alias)?.is_some() {
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Err(Error::BadRequest(
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ErrorKind::RoomInUse,
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"Room alias already exists.",
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))
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} else {
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Ok(Some(alias))
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}
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})?;
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let mut content = ruma::events::room::create::CreateEventContent::new(sender_user.clone());
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content.federate = body.creation_content.federate;
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content.predecessor = body.creation_content.predecessor.clone();
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content.room_version = RoomVersionId::Version6;
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// 1. The room create event
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomCreate,
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content: serde_json::to_value(content).expect("event is valid, we just created it"),
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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&sender_user,
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&room_id,
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&db,
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)?;
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// 2. Let the room creator join
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomMember,
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content: serde_json::to_value(member::MemberEventContent {
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membership: member::MembershipState::Join,
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displayname: db.users.displayname(&sender_user)?,
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avatar_url: db.users.avatar_url(&sender_user)?,
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is_direct: Some(body.is_direct),
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third_party_invite: None,
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})
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.expect("event is valid, we just created it"),
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unsigned: None,
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state_key: Some(sender_user.to_string()),
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redacts: None,
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},
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&sender_user,
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&room_id,
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&db,
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)?;
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// 3. Power levels
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// Figure out preset. We need it for preset specific events
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let preset = body
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.preset
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.clone()
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.unwrap_or_else(|| match &body.visibility {
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room::Visibility::Private => create_room::RoomPreset::PrivateChat,
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room::Visibility::Public => create_room::RoomPreset::PublicChat,
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room::Visibility::_Custom(_) => create_room::RoomPreset::PrivateChat, // Room visibility should not be custom
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});
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let mut users = BTreeMap::new();
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users.insert(sender_user.clone(), 100.into());
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if preset == create_room::RoomPreset::TrustedPrivateChat {
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for invite_ in &body.invite {
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users.insert(invite_.clone(), 100.into());
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}
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}
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let mut power_levels_content =
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serde_json::to_value(ruma::events::room::power_levels::PowerLevelsEventContent {
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users,
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..Default::default()
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})
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.expect("event is valid, we just created it");
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if let Some(power_level_content_override) = &body.power_level_content_override {
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let json = serde_json::from_str::<serde_json::Map<String, serde_json::Value>>(
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power_level_content_override.json().get(),
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)
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.map_err(|_| {
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Error::BadRequest(ErrorKind::BadJson, "Invalid power_level_content_override.")
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})?;
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for (key, value) in json {
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power_levels_content[key] = value;
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}
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}
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomPowerLevels,
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content: power_levels_content,
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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&sender_user,
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&room_id,
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&db,
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)?;
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// 4. Events set by preset
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// 4.1 Join Rules
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomJoinRules,
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content: match preset {
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create_room::RoomPreset::PublicChat => serde_json::to_value(
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join_rules::JoinRulesEventContent::new(join_rules::JoinRule::Public),
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)
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.expect("event is valid, we just created it"),
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// according to spec "invite" is the default
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_ => serde_json::to_value(join_rules::JoinRulesEventContent::new(
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join_rules::JoinRule::Invite,
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))
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.expect("event is valid, we just created it"),
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},
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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&sender_user,
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&room_id,
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&db,
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)?;
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// 4.2 History Visibility
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomHistoryVisibility,
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content: serde_json::to_value(history_visibility::HistoryVisibilityEventContent::new(
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history_visibility::HistoryVisibility::Shared,
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))
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.expect("event is valid, we just created it"),
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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&sender_user,
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&room_id,
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&db,
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)?;
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// 4.3 Guest Access
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomGuestAccess,
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content: match preset {
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create_room::RoomPreset::PublicChat => {
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serde_json::to_value(guest_access::GuestAccessEventContent::new(
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guest_access::GuestAccess::Forbidden,
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))
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.expect("event is valid, we just created it")
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}
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_ => serde_json::to_value(guest_access::GuestAccessEventContent::new(
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guest_access::GuestAccess::CanJoin,
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))
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.expect("event is valid, we just created it"),
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},
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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&sender_user,
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&room_id,
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&db,
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)?;
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// 5. Events listed in initial_state
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for event in &body.initial_state {
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let pdu_builder = serde_json::from_str::<PduBuilder>(
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&serde_json::to_string(&event).expect("AnyInitialStateEvent::to_string always works"),
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)
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.map_err(|_| Error::BadRequest(ErrorKind::InvalidParam, "Invalid initial state event."))?;
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// Silently skip encryption events if they are not allowed
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if pdu_builder.event_type == EventType::RoomEncryption && !db.globals.allow_encryption() {
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continue;
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}
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db.rooms
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.build_and_append_pdu(pdu_builder, &sender_user, &room_id, &db)?;
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}
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// 6. Events implied by name and topic
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if let Some(name) = &body.name {
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomName,
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content: serde_json::to_value(
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name::NameEventContent::new(name.clone()).map_err(|_| {
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Error::BadRequest(ErrorKind::InvalidParam, "Name is invalid.")
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})?,
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)
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.expect("event is valid, we just created it"),
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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&sender_user,
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&room_id,
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&db,
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)?;
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}
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if let Some(topic) = &body.topic {
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomTopic,
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content: serde_json::to_value(topic::TopicEventContent {
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topic: topic.clone(),
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})
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.expect("event is valid, we just created it"),
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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&sender_user,
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&room_id,
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&db,
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)?;
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}
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// 7. Events implied by invite (and TODO: invite_3pid)
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for user_id in &body.invite {
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let _ = invite_helper(sender_user, user_id, &room_id, &db, body.is_direct).await;
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}
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// Homeserver specific stuff
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if let Some(alias) = alias {
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db.rooms.set_alias(&alias, Some(&room_id), &db.globals)?;
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}
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if body.visibility == room::Visibility::Public {
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db.rooms.set_public(&room_id, true)?;
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}
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info!("{} created a room", sender_user);
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db.flush().await?;
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Ok(create_room::Response::new(room_id).into())
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}
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#[cfg_attr(
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feature = "conduit_bin",
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get("/_matrix/client/r0/rooms/<_>/event/<_>", data = "<body>")
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)]
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#[tracing::instrument(skip(db, body))]
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pub async fn get_room_event_route(
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db: DatabaseGuard,
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body: Ruma<get_room_event::Request<'_>>,
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) -> ConduitResult<get_room_event::Response> {
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let sender_user = body.sender_user.as_ref().expect("user is authenticated");
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if !db.rooms.is_joined(sender_user, &body.room_id)? {
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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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Ok(get_room_event::Response {
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event: db
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.rooms
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.get_pdu(&body.event_id)?
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.ok_or(Error::BadRequest(ErrorKind::NotFound, "Event not found."))?
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.to_room_event(),
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}
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.into())
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}
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#[cfg_attr(
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feature = "conduit_bin",
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post("/_matrix/client/r0/rooms/<_room_id>/upgrade", data = "<body>")
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)]
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#[tracing::instrument(skip(db, body))]
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pub async fn upgrade_room_route(
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db: DatabaseGuard,
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body: Ruma<upgrade_room::Request<'_>>,
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_room_id: String,
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) -> ConduitResult<upgrade_room::Response> {
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let sender_user = body.sender_user.as_ref().expect("user is authenticated");
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if !matches!(body.new_version, RoomVersionId::Version6) {
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return Err(Error::BadRequest(
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ErrorKind::UnsupportedRoomVersion,
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"This server does not support that room version.",
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));
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}
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// Create a replacement room
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let replacement_room = RoomId::new(db.globals.server_name());
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// Send a m.room.tombstone event to the old room to indicate that it is not intended to be used any further
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// Fail if the sender does not have the required permissions
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let tombstone_event_id = db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomTombstone,
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content: serde_json::to_value(ruma::events::room::tombstone::TombstoneEventContent {
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body: "This room has been replaced".to_string(),
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replacement_room: replacement_room.clone(),
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})
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.expect("event is valid, we just created it"),
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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sender_user,
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&body.room_id,
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&db,
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)?;
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// Get the old room federations status
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let federate = serde_json::from_value::<Raw<ruma::events::room::create::CreateEventContent>>(
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db.rooms
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.room_state_get(&body.room_id, &EventType::RoomCreate, "")?
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.ok_or_else(|| Error::bad_database("Found room without m.room.create event."))?
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.content
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.clone(),
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)
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.expect("Raw::from_value always works")
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.deserialize()
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.map_err(|_| Error::bad_database("Invalid room event in database."))?
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.federate;
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// Use the m.room.tombstone event as the predecessor
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let predecessor = Some(ruma::events::room::create::PreviousRoom::new(
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body.room_id.clone(),
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tombstone_event_id,
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));
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// Send a m.room.create event containing a predecessor field and the applicable room_version
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let mut create_event_content =
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ruma::events::room::create::CreateEventContent::new(sender_user.clone());
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create_event_content.federate = federate;
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create_event_content.room_version = body.new_version.clone();
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create_event_content.predecessor = predecessor;
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomCreate,
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content: serde_json::to_value(create_event_content)
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.expect("event is valid, we just created it"),
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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sender_user,
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&replacement_room,
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&db,
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)?;
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// Join the new room
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomMember,
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content: serde_json::to_value(member::MemberEventContent {
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membership: member::MembershipState::Join,
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displayname: db.users.displayname(&sender_user)?,
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avatar_url: db.users.avatar_url(&sender_user)?,
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is_direct: None,
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third_party_invite: None,
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})
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.expect("event is valid, we just created it"),
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unsigned: None,
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state_key: Some(sender_user.to_string()),
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redacts: None,
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},
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sender_user,
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&replacement_room,
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&db,
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)?;
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// Recommended transferable state events list from the specs
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let transferable_state_events = vec![
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EventType::RoomServerAcl,
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EventType::RoomEncryption,
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EventType::RoomName,
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EventType::RoomAvatar,
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EventType::RoomTopic,
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EventType::RoomGuestAccess,
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EventType::RoomHistoryVisibility,
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EventType::RoomJoinRules,
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EventType::RoomPowerLevels,
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];
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// Replicate transferable state events to the new room
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for event_type in transferable_state_events {
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let event_content = match db.rooms.room_state_get(&body.room_id, &event_type, "")? {
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Some(v) => v.content.clone(),
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None => continue, // Skipping missing events.
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};
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db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type,
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content: event_content,
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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sender_user,
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&replacement_room,
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&db,
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)?;
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}
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// Moves any local aliases to the new room
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for alias in db.rooms.room_aliases(&body.room_id).filter_map(|r| r.ok()) {
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db.rooms
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.set_alias(&alias, Some(&replacement_room), &db.globals)?;
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}
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// Get the old room power levels
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let mut power_levels_event_content =
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serde_json::from_value::<Raw<ruma::events::room::power_levels::PowerLevelsEventContent>>(
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db.rooms
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.room_state_get(&body.room_id, &EventType::RoomPowerLevels, "")?
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.ok_or_else(|| Error::bad_database("Found room without m.room.create event."))?
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.content
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.clone(),
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)
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.expect("database contains invalid PDU")
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.deserialize()
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.map_err(|_| Error::bad_database("Invalid room event in database."))?;
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// Setting events_default and invite to the greater of 50 and users_default + 1
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let new_level = max(
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50.into(),
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power_levels_event_content.users_default + 1.into(),
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);
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power_levels_event_content.events_default = new_level;
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power_levels_event_content.invite = new_level;
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// Modify the power levels in the old room to prevent sending of events and inviting new users
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let _ = db.rooms.build_and_append_pdu(
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PduBuilder {
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event_type: EventType::RoomPowerLevels,
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content: serde_json::to_value(power_levels_event_content)
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.expect("event is valid, we just created it"),
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unsigned: None,
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state_key: Some("".to_owned()),
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redacts: None,
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},
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sender_user,
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&body.room_id,
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&db,
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)?;
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db.flush().await?;
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// Return the replacement room id
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Ok(upgrade_room::Response { replacement_room }.into())
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}
|