From a3441429dae611f938a2fed506b0dea9718b5903 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Damir=20Jeli=C4=87?= <poljar@termina.org.uk>
Date: Wed, 8 Jul 2020 20:22:50 +0200
Subject: [PATCH] matrix-sdk: Add an autojoin example.

---
 matrix_sdk/examples/autojoin.rs | 100 ++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 matrix_sdk/examples/autojoin.rs

diff --git a/matrix_sdk/examples/autojoin.rs b/matrix_sdk/examples/autojoin.rs
new file mode 100644
index 00000000..0b95c673
--- /dev/null
+++ b/matrix_sdk/examples/autojoin.rs
@@ -0,0 +1,100 @@
+use std::{env, process::exit};
+
+use matrix_sdk::{
+    self,
+    events::{room::member::MemberEventContent, stripped::StrippedRoomMember},
+    Client, ClientConfig, EventEmitter, SyncRoom, SyncSettings,
+};
+use matrix_sdk_common_macros::async_trait;
+use url::Url;
+
+struct AutoJoinBot {
+    client: Client,
+}
+
+impl AutoJoinBot {
+    pub fn new(client: Client) -> Self {
+        Self { client }
+    }
+}
+
+#[async_trait]
+impl EventEmitter for AutoJoinBot {
+    async fn on_stripped_state_member(
+        &self,
+        room: SyncRoom,
+        room_member: &StrippedRoomMember,
+        _: Option<MemberEventContent>,
+    ) {
+        if room_member.state_key != self.client.user_id().await.unwrap() {
+            return;
+        }
+
+        match room {
+            SyncRoom::Invited(room) => {
+                let room = room.read().await;
+                println!("Autojoining room {}", room.display_name());
+                self.client
+                    .join_room_by_id(&room.room_id)
+                    .await
+                    .expect("Can't join room");
+            }
+            _ => (),
+        }
+    }
+}
+
+async fn login_and_sync(
+    homeserver_url: String,
+    username: String,
+    password: String,
+) -> Result<(), matrix_sdk::Error> {
+    let mut home = dirs::home_dir().expect("no home directory found");
+    home.push("autojoin_bot");
+
+    let client_config = ClientConfig::new().store_path(home);
+
+    let homeserver_url = Url::parse(&homeserver_url).expect("Couldn't parse the homeserver URL");
+    let mut client = Client::new_with_config(homeserver_url, client_config).unwrap();
+
+    client
+        .login(
+            username.clone(),
+            password,
+            None,
+            Some("autojoin bot".to_string()),
+        )
+        .await?;
+
+    println!("logged in as {}", username);
+
+    client
+        .add_event_emitter(Box::new(AutoJoinBot::new(client.clone())))
+        .await;
+
+    client
+        .sync_forever(SyncSettings::default(), |_| async {})
+        .await;
+
+    Ok(())
+}
+
+#[tokio::main]
+async fn main() -> Result<(), matrix_sdk::Error> {
+    tracing_subscriber::fmt::init();
+
+    let (homeserver_url, username, password) =
+        match (env::args().nth(1), env::args().nth(2), env::args().nth(3)) {
+            (Some(a), Some(b), Some(c)) => (a, b, c),
+            _ => {
+                eprintln!(
+                    "Usage: {} <homeserver_url> <username> <password>",
+                    env::args().next().unwrap()
+                );
+                exit(1)
+            }
+        };
+
+    login_and_sync(homeserver_url, username, password).await?;
+    Ok(())
+}