char
/
matrix-rust-sdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Clarify comment.

master
Denis Kasak 2020-07-06 15:22:49 +02:00
parent 559306a33c
commit 949305da72
1 changed files with 91 additions and 211 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

302
matrix_sdk_base/src/models/room.rs
View File

@ -18,7 +18,7 @@ use std::collections::{BTreeMap, HashMap, HashSet};
use std::convert::TryFrom;
use serde::{Deserialize, Serialize};
use tracing::{debug, error, trace};
use tracing::{debug, instrument};
#[cfg(feature = "messages")]
use super::message::MessageQueue;
@ -31,7 +31,7 @@ use crate::events::room::{
aliases::AliasesEvent,
canonical_alias::CanonicalAliasEvent,
encryption::EncryptionEvent,
member::{MemberEvent, MembershipChange, MembershipState},
member::{MemberEvent, MembershipChange},
name::NameEvent,
power_levels::{NotificationPowerLevels, PowerLevelsEvent, PowerLevelsEventContent},
tombstone::TombstoneEvent,
@ -321,10 +321,8 @@ impl Room {
/// Get the disambiguated display name for a member of this room.
///
/// If a member has no display name set, returns the MXID as a fallback.
///
/// This method never fails, even if user with the supplied MXID is not a member in the room.
/// In this case we still return the supplied MXID as a fallback.
/// If a member has no display name set, returns the MXID as a fallback. Additionally, we
/// return the MXID even if there is no such member in the room.
///
/// When displaying a room member's display name, clients *must* use this method to obtain the
/// name instead of displaying the `RoomMember::display_name` directly. This is because
@ -340,56 +338,49 @@ impl Room {
} else {
member.name().into()
}
}
},
// Even if there is no such member, we return the MXID that was given to us.
None => id.as_ref().into(),
}
}
/// Process the join or invite event for a new room member.
///
/// If the user is not already a member, he will be added. Otherwise, his state will be updated
/// to reflect the event's state.
/// Process the member event of an entering user.
///
/// Returns a tuple of:
///
/// 1. True if the event made changes to the room's state, false otherwise.
/// 2. Returns a map of display name disambiguations which tells us which members need to have
/// their display names disambiguated and to what.
///
/// # Arguments
///
/// * `target_member` - The ID of the member to add.
/// * `event` - The join or invite event for the specified room member.
fn add_member(
&mut self,
target_member: &UserId,
event: &MemberEvent,
) -> (bool, HashMap<UserId, bool>) {
#[instrument]
fn add_member(&mut self, event: &MemberEvent) -> (bool, HashMap<UserId, bool>) {
let new_member = RoomMember::new(event);
// Perform display name disambiguations, if necessary.
let disambiguations =
self.ambiguity_updates(target_member, None, new_member.display_name.clone());
let disambiguations = self.disambiguation_updates(&new_member.user_id, None, new_member.display_name.clone());
debug!("add_member: disambiguations: {:#?}", disambiguations);
debug!(
"add_member: disambiguations: {:#?}",
disambiguations
);
match event.content.membership {
MembershipState::Join => {
match event.membership_change() {
MembershipChange::Joined => {
// Since the member is now joined, he shouldn't be tracked as an invited member any
// longer if he was previously tracked as such.
self.invited_members.remove(target_member);
self.invited_members.remove(&new_member.user_id);
self.joined_members
.insert(target_member.clone(), new_member.clone())
.insert(new_member.user_id.clone(), new_member.clone())
}
MembershipState::Invite => self
MembershipChange::Invited => self
.invited_members
.insert(target_member.clone(), new_member.clone()),
.insert(new_member.user_id.clone(), new_member.clone()),
_ => panic!("Room::add_member called on event that is neither `join` nor `invite`."),
_ => {
panic!("Room::add_member called on an event that is neither a join nor an invite.")
}
};
for (id, is_ambiguous) in disambiguations.iter() {
@ -399,34 +390,29 @@ impl Room {
(true, disambiguations)
}
/// Process the leaving event for a room member.
/// Process the member event of a leaving user.
///
/// Returns a tuple of:
///
/// 1. True if the event made changes to the room's state, false otherwise.
/// 2. Returns a map of display name disambiguations which tells us which members need to have
/// their display names disambiguated and to what.
///
/// # Arguments
///
/// * `target_member` - The ID of the member to remove.
/// * `event` - The leaving event for the specified room member.
fn remove_member(
&mut self,
target_member: &UserId,
event: &MemberEvent,
) -> (bool, HashMap<UserId, bool>) {
#[instrument]
fn remove_member(&mut self, event: &MemberEvent) -> (bool, HashMap<UserId, bool>) {
let leaving_member = RoomMember::new(event);
if self.get_member(target_member).is_none() {
if self.get_member(&leaving_member.user_id).is_none() {
return (false, HashMap::new());
}
// Perform display name disambiguations, if necessary.
let disambiguations =
self.ambiguity_updates(target_member, leaving_member.display_name.clone(), None);
self.disambiguation_updates(&leaving_member.user_id, leaving_member.display_name.clone(), None);
debug!("remove_member: disambiguations: {:#?}", disambiguations);
debug!(
"remove_member: disambiguations: {:#?}",
disambiguations
);
for (id, is_ambiguous) in disambiguations.iter() {
self.get_member_mut(id).unwrap().display_name_ambiguous = *is_ambiguous;
@ -434,20 +420,12 @@ impl Room {
// TODO: factor this out to a method called `remove_member` and rename this method
// to something like `process_member_leaving_event`.
self.joined_members
.remove(target_member)
.or_else(|| self.invited_members.remove(target_member));
self.joined_members.remove(&leaving_member.user_id).or_else(||
self.invited_members.remove(&leaving_member.user_id));
(true, disambiguations)
}
/// Check whether the user with the MXID `user_id` is joined or invited to the room.
///
/// Returns true if so, false otherwise.
pub fn member_is_tracked(&self, user_id: &UserId) -> bool {
self.invited_members.contains_key(&user_id) || self.joined_members.contains_key(&user_id)
}
/// Get a room member by user ID.
///
/// If there is no such member, returns `None`.
@ -463,7 +441,7 @@ impl Room {
pub fn get_member_mut(&mut self, user_id: &UserId) -> Option<&mut RoomMember> {
match self.joined_members.get_mut(user_id) {
None => self.invited_members.get_mut(user_id),
Some(m) => Some(m),
Some(m) => Some(m)
}
}
@ -476,39 +454,19 @@ impl Room {
// Find all other users that share the display name with the joining user.
members
.filter(|(_, member)| {
member
.display_name
.as_ref()
.map(|other_name| other_name == name)
.unwrap_or(false)
})
.filter(|(_, member)| member.display_name.as_ref().map(|other_name| other_name == name).unwrap_or(false))
.map(|(_, member)| member.user_id.clone())
.collect()
}
/// Given a change in a member's display name, determine the set of members whose display names
/// would either become newly ambiguous or no longer ambiguous after the change.
/// Given a room member, generate a map of all display name disambiguations which are necessary
/// in order to make that member's display name unique.
///
/// Returns a map of `user` -> `ambiguity` for affected room member. If `ambiguity` is `true`,
/// the member's display name is newly ambiguous after the change. If `false`, their display
/// name is no longer ambiguous (but it was before).
/// The `inclusive` parameter controls whether or not the member for which we are
/// disambiguating should be considered a current member of the room.
///
/// The method *must* be called before any actual display name changes are performed in our
/// model (e.g. the `RoomMember` structs).
///
/// # Arguments
///
/// * `member` - The ID of the member changing their display name.
/// * `old_name` - Their old display name, prior to the change. May be `None` if they had no
/// display name in this room (e.g. because it was unset or because they were not a room
/// member).
/// * `new_name` - Their new display name, after the change. May be `None` if they are no
/// longer going to have a display name in this room after the change (e.g. because they are
/// unsetting it or leaving the room).
///
/// Returns a map from user ID to the new ambiguity status.
fn ambiguity_updates(
/// Returns a map from MXID to disambiguated name.
fn disambiguation_updates(
&self,
member: &UserId,
old_name: Option<String>,
@ -525,7 +483,7 @@ impl Room {
n if n > 1 => vec![(member.clone(), false)].into_iter().collect(),
1 => old_name_eq_class.into_iter().map(|m| (m, false)).collect(),
0 => HashMap::new(),
_ => panic!("impossible"),
_ => panic!("impossible")
};
//
@ -543,10 +501,7 @@ impl Room {
_ => vec![(member.clone(), true)].into_iter().collect(),
};
disambiguate_old
.into_iter()
.chain(disambiguate_new.into_iter())
.collect()
disambiguate_old.into_iter().chain(disambiguate_new.into_iter()).collect()
}
/// Add to the list of `RoomAliasId`s.
@ -621,61 +576,45 @@ impl Room {
pub fn handle_membership(
&mut self,
event: &MemberEvent,
state_event: bool,
) -> (bool, HashMap<UserId, bool>) {
use MembershipChange::*;
use MembershipState::*;
trace!(
"Received {} event: {}",
if state_event { "state" } else { "timeline" },
event.event_id
);
match event.membership_change() {
Invited | Joined => {
debug!(
"handle_membership: User {} entering room {} ({}) (joined or invited)",
event.state_key,
self.room_id,
self.display_name(),
);
let target_user = match UserId::try_from(event.state_key.clone()) {
Ok(id) => id,
Err(e) => {
error!("Received a member event with invalid state_key: {}", e);
return (false, HashMap::new());
self.add_member(event)
}
};
Kicked | Banned | KickedAndBanned | InvitationRejected | Left => {
debug!(
"handle_membership: User {} exiting room {} ({}) (leaving, kicked, banned or invitation rejected)",
event.state_key,
self.room_id,
self.display_name(),
);
if state_event && !self.member_is_tracked(&target_user) {
debug!(
"handle_membership: User {user_id} is {state} the room {room_id} ({room_name})",
user_id = target_user,
state = event.content.membership.describe(),
room_id = self.room_id,
room_name = self.display_name(),
);
match event.content.membership {
Join | Invite => self.add_member(&target_user, event),
// We are not interested in tracking past members for now
_ => (false, HashMap::new()),
self.remove_member(event)
}
} else {
let change = event.membership_change();
ProfileChanged => {
debug!(
"handle_membership: Profile changed for user {} in room {} ({}) (displayname={:?}, avatar={:?}",
event.state_key,
self.room_id,
self.display_name(),
event.content.displayname,
event.content.avatar_url
);
debug!(
"handle_membership: User {user_id} {action} the room {room_id} ({room_name})",
user_id = target_user,
action = change.describe(),
room_id = self.room_id,
room_name = self.display_name(),
);
match change {
Invited | Joined => self.add_member(&target_user, event),
Kicked | Banned | KickedAndBanned | InvitationRejected | Left => {
self.remove_member(&target_user, event)
}
ProfileChanged => self.update_member_profile(&target_user, event),
// Not interested in other events.
_ => (false, HashMap::new()),
self.update_member_profile(event)
}
// Not interested in other events.
_ => (false, HashMap::new()),
}
}
@ -775,7 +714,7 @@ impl Room {
pub fn receive_timeline_event(&mut self, event: &RoomEvent) -> bool {
match event {
// update to the current members of the room
RoomEvent::RoomMember(member) => self.handle_membership(member, false).0,
RoomEvent::RoomMember(member) => self.handle_membership(member).0,
// finds all events related to the name of the room for later use
RoomEvent::RoomName(name) => self.handle_room_name(name),
RoomEvent::RoomCanonicalAlias(c_alias) => self.handle_canonical(c_alias),
@ -800,7 +739,7 @@ impl Room {
pub fn receive_state_event(&mut self, event: &StateEvent) -> bool {
match event {
// update to the current members of the room
StateEvent::RoomMember(member) => self.handle_membership(member, true).0,
StateEvent::RoomMember(member) => self.handle_membership(member).0,
// finds all events related to the name of the room for later use
StateEvent::RoomName(name) => self.handle_room_name(name),
StateEvent::RoomCanonicalAlias(c_alias) => self.handle_canonical(c_alias),
@ -889,55 +828,38 @@ impl Room {
///
/// # Arguments
///
/// * `target_member` - The ID of the member to update.
/// * `event` - The profile update event for the specified room member.
/// * `event` - The profile update event for a specified room member.
#[instrument]
pub fn update_member_profile(
&mut self,
target_member: &UserId,
event: &MemberEvent,
) -> (bool, HashMap<UserId, bool>) {
let old_name = self
.get_member(target_member)
.map_or_else(|| None, |m| m.display_name.clone());
let user_id = if let Ok(id) = UserId::try_from(event.state_key.as_str()) {
id
} else {
return (false, HashMap::new());
};
let old_name = self.get_member(&user_id).map_or_else(|| None, |m| m.display_name.clone());
let new_name = event.content.displayname.clone();
debug!(
"update_member_profile [{}]: from nick {:#?} to nick {:#?}",
self.room_id, old_name, &new_name
);
let disambiguations =
self.ambiguity_updates(target_member, old_name.clone(), new_name.clone());
let disambiguations = self.disambiguation_updates(&user_id, old_name, new_name);
for (id, is_ambiguous) in disambiguations.iter() {
if self.get_member_mut(id).is_none() {
error!("update_member_profile: I'm about to fail for id {}. user_id = {}\nevent = {:#?}",
id,
target_member,
event);
} else {
self.get_member_mut(id).unwrap().display_name_ambiguous = *is_ambiguous;
}
self.get_member_mut(id).unwrap().display_name_ambiguous = *is_ambiguous;
}
debug!(
"update_member_profile [{}]: disambiguations: {:#?}",
self.room_id, &disambiguations
"update_member_profile: disambiguations: {:#?}",
&disambiguations
);
let changed = match self.get_member_mut(target_member) {
let changed = match self.get_member_mut(&user_id) {
Some(member) => {
member.display_name = new_name;
member.display_name = event.content.displayname.clone();
member.avatar_url = event.content.avatar_url.clone();
true
}
None => {
error!(
"update_member_profile [{}]: user {} does not exist",
self.room_id, target_member
);
false
}
None => false,
};
(changed, disambiguations)
@ -973,48 +895,6 @@ impl Room {
}
}
trait Describe {
fn describe(&self) -> String;
}
impl Describe for MembershipState {
fn describe(&self) -> String {
use MembershipState::*;
match self {
Ban => "is banned in",
Invite => "is invited to",
Join => "is a member of",
Knock => "is requesting access",
Leave => "left",
}
.to_string()
}
}
impl Describe for MembershipChange {
fn describe(&self) -> String {
use MembershipChange::*;
match self {
Invited => "got invited to",
Joined => "joined",
Kicked => "got kicked from",
Banned => "got banned from",
Unbanned => "got unbanned from",
KickedAndBanned => "got kicked and banned from",
InvitationRejected => "rejected the invitation to",
InvitationRevoked => "got their invitation revoked from",
Left => "left",
ProfileChanged => "changed their profile",
None => "did nothing in",
NotImplemented => "NOT IMPLEMENTED",
Error => "ERROR",
}
.to_string()
}
}
#[cfg(test)]
mod test {
use super::*;