state_store: load_client takes a sessions obj, docs, copyright, move state store into base client

matrix_sdk/src/async_client.rs

@@ -675,8 +675,8 @@ impl AsyncClient {
                 let decrypted_event = {
                     let mut client = self.base_client.write().await;
                     let mut timeline_update = false;
-                    let decrypt_ev = client
+                    let (decrypt_ev, timeline_update) = client
-                        .receive_joined_timeline_event(room_id, &mut event, &mut timeline_update)
+                        .receive_joined_timeline_event(room_id, &mut event)
                         .await;
                     if timeline_update {
                         updated = true;
@@ -746,7 +746,7 @@ impl AsyncClient {
         }
 
         let mut client = self.base_client.write().await;
-        client.receive_sync_response(&mut response).await;
+        client.receive_sync_response(&mut response, updated).await?;
 
         if updated {
             if let Some(store) = client.state_store.as_ref() {

matrix_sdk/src/base_client.rs

@@ -76,7 +76,10 @@ pub struct Client {
     /// Any implementor of EventEmitter will act as the callbacks for various
     /// events.
     pub event_emitter: Option<Box<dyn EventEmitter>>,
+    /// Any implementor of `StateStore` will be called to save `Room` and
+    /// some `BaseClient` state during `AsyncClient::sync` calls.
     ///
+    /// There is a default implementation `JsonStore` that saves JSON to disk.
     pub state_store: Option<Box<dyn StateStore>>,
     /// Does the `Client` need to sync with the state store.
     needs_state_store_sync: bool,
@@ -148,7 +151,8 @@ impl Client {
     /// Returns `true` when a sync has successfully completed.
     pub(crate) async fn sync_with_state_store(&mut self) -> Result<bool> {
         if let Some(store) = self.state_store.as_ref() {
-            if let Some(client_state) = store.load_client_state().await? {
+            if let Some(sess) = self.session.as_ref() {
+                if let Some(client_state) = store.load_client_state(sess).await? {
                     let ClientState {
                         user_id,
                         device_id,
@@ -182,7 +186,7 @@ impl Client {
 
                 self.needs_state_store_sync = false;
             }
-
+        }
         Ok(!self.needs_state_store_sync)
     }
 
@@ -278,23 +282,19 @@ impl Client {
 
     /// Receive a timeline event for a joined room and update the client state.
     ///
-    /// If the event was a encrypted room event and decryption was successful
+    /// Returns a tuple of the successfully decrypted event, or None on failure and
-    /// the decrypted event will be returned, otherwise None.
+    /// a bool, true when the `Room` state has been updated.
     ///
     /// # Arguments
     ///
     /// * `room_id` - The unique id of the room the event belongs to.
     ///
     /// * `event` - The event that should be handled by the client.
-    ///
-    /// * `did_update` - This is used internally to confirm when the state has
-    /// been updated.
     pub async fn receive_joined_timeline_event(
         &mut self,
         room_id: &RoomId,
         event: &mut EventJson<RoomEvent>,
-        did_update: &mut bool,
+    ) -> (Option<EventJson<RoomEvent>>, bool) {
-    ) -> Option<EventJson<RoomEvent>> {
         match event.deserialize() {
             #[allow(unused_mut)]
             Ok(mut e) => {
@@ -319,11 +319,9 @@ impl Client {
                 }
 
                 let mut room = self.get_or_create_room(&room_id).write().await;
-                // TODO is passing in the bool to use in `AsyncClient::sync` ok here
+                (decrypted_event, room.receive_timeline_event(&e))
-                *did_update = room.receive_timeline_event(&e);
-                decrypted_event
             }
-            _ => None,
+            _ => (None, false),
         }
     }
 
@@ -419,7 +417,13 @@ impl Client {
     /// # Arguments
     ///
     /// * `response` - The response that we received after a successful sync.
-    pub async fn receive_sync_response(&mut self, response: &mut api::sync::sync_events::Response) {
+    ///
+    /// * `did_update` - Signals to the `StateStore` if the client state needs updating.
+    pub async fn receive_sync_response(
+        &mut self,
+        response: &mut api::sync::sync_events::Response,
+        did_update: bool,
+    ) -> Result<()> {
         self.sync_token = Some(response.next_batch.clone());
 
         #[cfg(feature = "encryption")]
@@ -442,6 +446,14 @@ impl Client {
                 }
             }
         }
+
+        if did_update {
+            if let Some(store) = self.state_store.as_ref() {
+                let state = ClientState::from_base_client(&self);
+                store.store_client_state(state).await?;
+            }
+        }
+        Ok(())
     }
 
     /// Should account or one-time keys be uploaded to the server.

matrix_sdk/src/state/mod.rs

@@ -1,4 +1,4 @@
-// Copyright 2020 Damir Jelić
+// Copyright 2020 Devin Ragotzy
 // Copyright 2020 The Matrix.org Foundation C.I.C.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -23,8 +23,7 @@ use serde::{Deserialize, Serialize};
 use crate::base_client::{Client as BaseClient, Token};
 use crate::events::push_rules::Ruleset;
 use crate::identifiers::{DeviceId, RoomId, UserId};
-use crate::models::Room;
+use crate::{Result, Room, Session};
-use crate::Result;
 
 /// `ClientState` holds all the information to restore a `BaseClient`
 /// except the `access_token` as the default store is not secure.
@@ -72,7 +71,7 @@ pub trait StateStore: Send + Sync {
     ///
     /// An `Option::None` should be returned only if the `StateStore` tries to
     /// load but no state has been stored.
-    async fn load_client_state(&self) -> Result<Option<ClientState>>;
+    async fn load_client_state(&self, _: &Session) -> Result<Option<ClientState>>;
     /// Load the state of all `Room`s.
     ///
     /// This will be mapped over in the client in order to store `Room`s in an async safe way.

matrix_sdk/src/state/state_store.rs

@@ -1,6 +1,5 @@
 use std::collections::HashMap;
-use std::fs::{self, OpenOptions};
+use std::fs;
-use std::io::{BufReader, BufWriter, Write};
 use std::path::{Path, PathBuf};
 use std::sync::{
     atomic::{AtomicBool, Ordering},
@@ -8,16 +7,17 @@ use std::sync::{
 };
 
 use tokio::fs as async_fs;
+use tokio::io::AsyncWriteExt;
 use tokio::sync::RwLock;
 
 use super::{ClientState, StateStore};
 use crate::identifiers::RoomId;
-use crate::{Error, Result, Room};
+use crate::{Error, Result, Room, Session};
 /// A default `StateStore` implementation that serializes state as json
 /// and saves it to disk.
 ///
 /// When logged in the `JsonStore` appends the user_id to it's folder path,
-/// so all files are saved in `my_client/user_id/*`.
+/// so all files are saved in `my_client/user_id_localpart/*`.
 pub struct JsonStore {
     path: Arc<RwLock<PathBuf>>,
     user_path_set: AtomicBool,
@@ -41,7 +41,12 @@ impl JsonStore {
 
 #[async_trait::async_trait]
 impl StateStore for JsonStore {
-    async fn load_client_state(&self) -> Result<Option<ClientState>> {
+    async fn load_client_state(&self, sess: &Session) -> Result<Option<ClientState>> {
+        if !self.user_path_set.load(Ordering::SeqCst) {
+            self.user_path_set.swap(true, Ordering::SeqCst);
+            self.path.write().await.push(sess.user_id.localpart())
+        }
+
         let mut path = self.path.read().await.clone();
         path.push("client.json");
 
@@ -67,10 +72,9 @@ impl StateStore for JsonStore {
                 continue;
             }
 
-            let f_hdl = OpenOptions::new().read(true).open(&file)?;
+            let json = async_fs::read_to_string(&file).await?;
-            let reader = BufReader::new(f_hdl);
 
-            let room = serde_json::from_reader::<_, Room>(reader).map_err(Error::from)?;
+            let room = serde_json::from_str::<Room>(&json).map_err(Error::from)?;
             let room_id = room.room_id.clone();
 
             rooms_map.insert(room_id, room);
@@ -97,15 +101,13 @@ impl StateStore for JsonStore {
 
         let json = serde_json::to_string(&state).map_err(Error::from)?;
 
-        let file = OpenOptions::new()
+        let mut file = async_fs::OpenOptions::new()
             .write(true)
             .create(true)
             .truncate(true)
-            .open(path)?;
+            .open(path)
-        let mut writer = BufWriter::new(file);
+            .await?;
-        writer.write_all(json.as_bytes())?;
+        file.write_all(json.as_bytes()).await.map_err(Error::from)
-
-        Ok(())
     }
 
     async fn store_room_state(&self, room: &Room) -> Result<()> {
@@ -125,15 +127,13 @@ impl StateStore for JsonStore {
 
         let json = serde_json::to_string(&room).map_err(Error::from)?;
 
-        let file = OpenOptions::new()
+        let mut file = async_fs::OpenOptions::new()
             .write(true)
             .create(true)
             .truncate(true)
-            .open(path)?;
+            .open(path)
-        let mut writer = BufWriter::new(file);
+            .await?;
-        writer.write_all(json.as_bytes())?;
+        file.write_all(json.as_bytes()).await.map_err(Error::from)
-
-        Ok(())
     }
 }
 
@@ -187,6 +187,12 @@ mod test {
 
         let user = UserId::try_from("@example:example.com").unwrap();
 
+        let sess = Session {
+            access_token: "32nj9zu034btz90".to_string(),
+            user_id: user.clone(),
+            device_id: "Tester".to_string(),
+        };
+
         let store = JsonStore::open(path).unwrap();
 
         let state = ClientState {
@@ -198,7 +204,9 @@ mod test {
         };
 
         store.store_client_state(state.clone()).await.unwrap();
-        let loaded = store.load_client_state().await.unwrap();
+
+        let store = JsonStore::open(path).unwrap();
+        let loaded = store.load_client_state(&sess).await.unwrap();
         assert_eq!(loaded, Some(state));
     }
 

matrix_sdk/src/test_builder.rs

@@ -367,7 +367,7 @@ impl ClientTestRunner {
         }
 
         for event in &self.room_events {
-            cli.receive_joined_timeline_event(room_id, &mut EventJson::from(event), &mut false)
+            cli.receive_joined_timeline_event(room_id, &mut EventJson::from(event))
                 .await;
         }
         for event in &self.presence_events {