|
| 1 | +use std::collections::BTreeMap; |
| 2 | + |
| 3 | +use ruma::{ |
| 4 | + MxcUri, OwnedMxcUri, OwnedRoomId, OwnedUserId, RoomId, UserId, |
| 5 | + events::room::member::SyncRoomMemberEvent, |
| 6 | +}; |
| 7 | +use tracing::trace; |
| 8 | + |
| 9 | +use crate::{StateChanges, StateStore, StoreError, store::SaveLockedStateStore}; |
| 10 | + |
| 11 | +/// A cache for keeping track of avatar changes in sync responses. |
| 12 | +#[derive(Debug)] |
| 13 | +pub struct AvatarCache { |
| 14 | + store: SaveLockedStateStore, |
| 15 | + changes: BTreeMap<OwnedRoomId, BTreeMap<OwnedUserId, Option<OwnedMxcUri>>>, |
| 16 | +} |
| 17 | + |
| 18 | +impl AvatarCache { |
| 19 | + /// Creates a new [`AvatarCache`]. |
| 20 | + pub fn new(store: SaveLockedStateStore) -> Self { |
| 21 | + Self { store, changes: BTreeMap::new() } |
| 22 | + } |
| 23 | + |
| 24 | + /// Processes the room member event and checks if there was any change in |
| 25 | + /// the avatar URL for the room member. |
| 26 | + pub async fn handle_event( |
| 27 | + &mut self, |
| 28 | + state_changes: &StateChanges, |
| 29 | + room_id: &RoomId, |
| 30 | + member_event: &SyncRoomMemberEvent, |
| 31 | + ) -> Result<(), StoreError> { |
| 32 | + let user_id = member_event.sender(); |
| 33 | + if self.changes.get(room_id).is_some_and(|user_ids| user_ids.contains_key(user_id)) { |
| 34 | + return Ok(()); |
| 35 | + } |
| 36 | + match member_event { |
| 37 | + SyncRoomMemberEvent::Original(original_event) => { |
| 38 | + let avatar_url = original_event.content.avatar_url.clone(); |
| 39 | + self.add_to_changes_if_needed(state_changes, room_id, user_id, avatar_url).await; |
| 40 | + } |
| 41 | + SyncRoomMemberEvent::Redacted(_) => { |
| 42 | + trace!("Redacted event, discarding avatar change for {:?}", user_id); |
| 43 | + } |
| 44 | + } |
| 45 | + Ok(()) |
| 46 | + } |
| 47 | + |
| 48 | + async fn add_to_changes_if_needed( |
| 49 | + &mut self, |
| 50 | + state_changes: &StateChanges, |
| 51 | + room_id: &RoomId, |
| 52 | + user_id: &UserId, |
| 53 | + avatar: Option<OwnedMxcUri>, |
| 54 | + ) { |
| 55 | + if !self.is_same_avatar(state_changes, room_id, user_id, avatar.as_deref()).await { |
| 56 | + trace!("Avatar for {} is different, saving to changes", user_id); |
| 57 | + let change = self.changes.entry(room_id.to_owned()).or_default(); |
| 58 | + change.insert(user_id.to_owned(), avatar); |
| 59 | + } else { |
| 60 | + trace!("Avatar for {} is the same, not saving", user_id); |
| 61 | + } |
| 62 | + } |
| 63 | + |
| 64 | + async fn is_same_avatar( |
| 65 | + &self, |
| 66 | + state_changes: &StateChanges, |
| 67 | + room_id: &RoomId, |
| 68 | + user_id: &UserId, |
| 69 | + avatar: Option<&MxcUri>, |
| 70 | + ) -> bool { |
| 71 | + let current_avatar = if let Some(event) = state_changes.member(room_id, user_id) { |
| 72 | + event.content.avatar_url |
| 73 | + } else { |
| 74 | + match self.store.get_profile(room_id, user_id).await { |
| 75 | + Ok(Some(profile)) => profile.content.avatar_url, |
| 76 | + Ok(None) => None, |
| 77 | + Err(_) => None, |
| 78 | + } |
| 79 | + }; |
| 80 | + |
| 81 | + trace!( |
| 82 | + "Current avatar for {} in {} is: {:?}, new avatar is: {:?}", |
| 83 | + user_id, room_id, current_avatar, avatar |
| 84 | + ); |
| 85 | + |
| 86 | + match (current_avatar, avatar) { |
| 87 | + (Some(current_avatar), Some(avatar)) => current_avatar == avatar, |
| 88 | + (None, None) => true, |
| 89 | + _ => false, |
| 90 | + } |
| 91 | + } |
| 92 | + |
| 93 | + /// Removes and returns the avatar changes associated with the [`RoomId`], |
| 94 | + /// if any. |
| 95 | + pub fn remove_changes( |
| 96 | + &mut self, |
| 97 | + room_id: &RoomId, |
| 98 | + ) -> Option<BTreeMap<OwnedUserId, Option<OwnedMxcUri>>> { |
| 99 | + self.changes.remove(room_id) |
| 100 | + } |
| 101 | +} |
0 commit comments