GetUser

.gitignore

@@ -28,3 +28,4 @@ target
 private.key
 config.json
 messages
+users.db

src/data/mod.rs

@@ -1,2 +1,3 @@
 pub mod config;
 pub mod messages;
+pub mod users;

src/data/users.rs

@@ -0,0 +1,62 @@
+use std::{collections::HashMap, path::PathBuf};
+
+use rusqlite::{Connection, params};
+use tokio::sync::Mutex;
+
+use crate::types::ClientMeta;
+
+pub struct UserMetaStore {
+    conn: Mutex<Connection>,
+}
+
+impl UserMetaStore {
+    pub fn new(path: PathBuf) -> anyhow::Result<Self> {
+        let conn = Connection::open(&path)?;
+        conn.execute(
+            "CREATE TABLE IF NOT EXISTS users (
+                pubkey TEXT PRIMARY KEY,
+                display_name TEXT NOT NULL,
+                avatar TEXT
+            )",
+            [],
+        )?;
+        Ok(Self {
+            conn: Mutex::new(conn),
+        })
+    }
+
+    pub async fn get_users(
+        &self,
+        pubkeys: &[String],
+    ) -> anyhow::Result<HashMap<String, ClientMeta>> {
+        let conn = self.conn.lock().await;
+        let placeholders = pubkeys.iter().map(|_| "?").collect::<Vec<_>>().join(",");
+        let query = format!(
+            "SELECT pubkey, display_name, avatar FROM users WHERE pubkey IN ({placeholders})"
+        );
+
+        let mut stmt = conn.prepare(&query)?;
+        let rows = stmt.query_map(rusqlite::params_from_iter(pubkeys), |row| {
+            Ok((
+                row.get::<_, String>(0)?,
+                ClientMeta {
+                    display_name: row.get(1)?,
+                    avatar: row.get(2)?,
+                },
+            ))
+        })?;
+
+        rows.collect::<Result<HashMap<_, _>, _>>()
+            .map_err(Into::into)
+    }
+
+    pub async fn upsert_user(&self, pubkey: &str, meta: &ClientMeta) -> anyhow::Result<()> {
+        let conn = self.conn.lock().await;
+        conn.execute(
+            "INSERT INTO users (pubkey, display_name, avatar) VALUES (?1, ?2, ?3)
+             ON CONFLICT(pubkey) DO UPDATE SET display_name = ?2, avatar = ?3",
+            params![pubkey, meta.display_name, meta.avatar],
+        )?;
+        Ok(())
+    }
+}

src/protocol/mod.rs

@@ -9,6 +9,7 @@ use crate::{data::messages::StoredMessage, server::Server, types::ClientMeta};
 
 pub mod initialize;
 pub mod message;
+pub mod user;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(tag = "method")]
@@ -25,6 +26,10 @@ pub enum ClientMethod {
         messages: HashMap<String, Vec<StoredMessage>>,
     },
 
+    Users {
+        users: HashMap<String, ClientMeta>,
+    },
+
     Error {
         error: Cow<'static, str>,
     },
@@ -53,6 +58,10 @@ pub enum ServerMethod {
 
     Meta(ClientMeta),
 
+    GetUsers {
+        pubkeys: Vec<String>,
+    },
+
     Error {
         error: String,
     },
@@ -93,6 +102,10 @@ pub async fn read_loop(
             ServerMethod::GetMessages { channel_id, chunk } => {
                 message::get_messages(server, verifying_key, socket, channel_id, chunk).await?;
             }
+
+            ServerMethod::GetUsers { pubkeys } => {
+                user::get_users(server, verifying_key, socket, pubkeys).await?;
+            }
         }
 
         socket_lock = socket.lock().await;

src/protocol/user.rs

@@ -0,0 +1,23 @@
+use std::sync::Arc;
+
+use axum::extract::ws::WebSocket;
+use ed25519_dalek::VerifyingKey;
+use tokio::sync::Mutex;
+
+use crate::{
+    protocol::{ClientMethod, send_socket},
+    server::Server,
+};
+
+pub async fn get_users(
+    server: &Arc<Server>,
+    _verifying_key: VerifyingKey,
+    socket: &Arc<Mutex<WebSocket>>,
+    pubkeys: Vec<String>,
+) -> anyhow::Result<()> {
+    let users = server.user_store.get_users(&pubkeys).await?;
+
+    send_socket(&mut *socket.lock().await, &ClientMethod::Users { users }).await?;
+
+    Ok(())
+}

src/server.rs

@@ -12,7 +12,7 @@ use ed25519_dalek::{SigningKey, VerifyingKey};
 use tokio::{sync::Mutex, task::JoinSet};
 
 use crate::{
-    data::{config::Config, messages::MessageStore},
+    data::{config::Config, messages::MessageStore, users::UserMetaStore},
     protocol::{ClientMethod, read_loop, send_socket},
     types::ClientMeta,
 };
@@ -29,6 +29,7 @@ pub struct Server {
     pub config: Config,
     pub clients: Mutex<HashMap<VerifyingKey, Arc<UserConnections>>>,
     pub message_store: MessageStore,
+    pub user_store: UserMetaStore,
 }
 
 impl Server {
@@ -38,6 +39,7 @@ impl Server {
             config: Config::get().await?,
             clients: Mutex::new(HashMap::new()),
             message_store: MessageStore::new(PathBuf::from("messages"))?,
+            user_store: UserMetaStore::new(PathBuf::from("users.db"))?,
         }))
     }
 }
@@ -49,6 +51,14 @@ impl Server {
         ws.on_upgrade(move |socket: WebSocket| async move {
             match UserConnections::initialize(&s, socket).await {
                 Ok((client, public_key, meta)) => {
+                    if let Err(e) = s
+                        .user_store
+                        .upsert_user(&crate::signature::to_string(&public_key), &meta)
+                        .await
+                    {
+                        eprintln!("Failed to upsert client: {e}");
+                    }
+
                     let client = Arc::new(Mutex::new(client));
 
                     let mut clients_meta = s.clients.lock().await;