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feat(appservice): Improve autojoin example #703

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May 23, 2022
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feat(appservice): Improve autojoin example #703

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21 changes: 20 additions & 1 deletion crates/matrix-sdk-appservice/examples/appservice_autojoin.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -8,9 +8,14 @@ use matrix_sdk_appservice::{
events::room::member::{MembershipState, OriginalSyncRoomMemberEvent},
UserId,
},
HttpError,
},
AppService, AppServiceRegistration, Result,
};
use ruma::api::{
client::{error::ErrorKind, uiaa::UiaaResponse},
error::{FromHttpResponseError, ServerError},
};
use tracing::trace;

pub async fn handle_room_member(
Expand All @@ -22,7 +27,9 @@ pub async fn handle_room_member(
trace!("not an appservice user: {}", event.state_key);
} else if let MembershipState::Invite = event.content.membership {
let user_id = UserId::parse(event.state_key.as_str())?;
appservice.register_virtual_user(user_id.localpart()).await?;
if let Err(error) = appservice.register_virtual_user(user_id.localpart()).await {
error_if_user_not_in_use(error)?;
}

let client = appservice.virtual_user_client(user_id.localpart()).await?;
client.join_room_by_id(room.room_id()).await?;
Expand All @@ -31,6 +38,17 @@ pub async fn handle_room_member(
Ok(())
}

pub fn error_if_user_not_in_use(error: matrix_sdk_appservice::Error) -> Result<()> {
match error {
// If user is already in use that's OK.
matrix_sdk_appservice::Error::Matrix(matrix_sdk::Error::Http(HttpError::UiaaError(
FromHttpResponseError::Server(ServerError::Known(UiaaResponse::MatrixError(error))),
))) if matches!(error.kind, ErrorKind::UserInUse) => Ok(()),
// In all other cases return with an error.
error => Err(error),
}
}

#[tokio::main]
pub async fn main() -> Result<(), Box<dyn std::error::Error>> {
env::set_var("RUST_LOG", "matrix_sdk=debug,matrix_sdk_appservice=debug");
Expand All @@ -41,6 +59,7 @@ pub async fn main() -> Result<(), Box<dyn std::error::Error>> {
let registration = AppServiceRegistration::try_from_yaml_file("./tests/registration.yaml")?;

let appservice = AppService::new(homeserver_url, server_name, registration).await?;
appservice.register_user_query(Box::new(|_, _| Box::pin(async { true }))).await;
appservice
.register_event_handler_context(appservice.clone())?
.register_event_handler(
Expand Down