cargolifter-web 0.2.0

CargoLifter web service
Documentation 
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use cargolifter_core::{models::PublishRequest, BackendCommand, StorageCommand};

pub async fn publish(
    request: crate::RequestExtractor,
    headers: axum::http::HeaderMap,
    backend: axum::extract::Extension<tokio::sync::mpsc::Sender<cargolifter_core::BackendCommand>>,
    storage: axum::extract::Extension<tokio::sync::mpsc::Sender<cargolifter_core::StorageCommand>>,
) -> Result<(), axum::http::StatusCode> {
    let request = request.0;
    tracing::info!(
        "publishing '{}' in version '{}'",
        request.meta.name,
        request.meta.vers
    );
    let token = match headers.get("authorization") {
        Some(token) => token.to_str().unwrap(),
        None => {
            return Err(axum::http::StatusCode::UNAUTHORIZED);
        }
    };


    if is_version_published(backend.0.clone(), &request.meta.name, &request.meta.vers, token).await? {
        // TODO: return 200 with json like
        // {
        //     // Array of errors to display to the user.
        //     "errors": [
        //         {
        //             // The error message as a string.
        //             "detail": "error message text"
        //         }
        //     ]
        // }

        Err(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
    } else {
        // TODO: store to storage
        publish_to_storage(
            storage.0,
            &request.meta.name,
            &request.meta.vers,
            request.data.clone(),
        )
        .await?;
        publish_to_backend(backend.0, request, token).await?;

        Ok(())
    }
}

async fn is_version_published(
    storage: tokio::sync::mpsc::Sender<cargolifter_core::BackendCommand>,
    crate_name: &str,
    crate_version: &str,
    token: &str,
) -> Result<bool, axum::http::StatusCode> {
    let (tx, rx) = tokio::sync::oneshot::channel::<bool>();

    match storage.send(BackendCommand::IsVersionPublished(token.into(), crate_name.into(), crate_version.into(), tx)).await {
        Ok(_) => match rx.await {
            Ok(result) => {
                Ok(result)
            }
            Err(e) => {
                tracing::error!("Failed to receive storage response: {}", e);
                Err(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
            }
        },
        Err(e) => {
            tracing::error!("Failed to send storage command: {}", e);
            Err(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
        }
    }
}

async fn publish_to_storage(
    storage: tokio::sync::mpsc::Sender<cargolifter_core::StorageCommand>,
    crate_name: &str,
    crate_version: &str,
    data: Vec<u8>,
) -> Result<(), axum::http::StatusCode> {
    let (tx, rx) = tokio::sync::oneshot::channel::<bool>();
    let put_request = cargolifter_core::models::StoragePutRequest {
        crate_name: crate_name.into(),
        crate_version: crate_version.into(),
        data,
        result_sender: tx,
    };

    match storage.send(StorageCommand::Put(put_request)).await {
        Ok(_) => match rx.await {
            Ok(result) => {
                if result {
                    Ok(())
                } else {
                    tracing::error!("Failed store crate");
                    Err(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
                }
            }
            Err(e) => {
                tracing::error!("Failed to receive storage response: {}", e);
                Err(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
            }
        },
        Err(e) => {
            tracing::error!("Failed to send storage command: {}", e);
            Err(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
        }
    }
}

async fn publish_to_backend(
    backend: tokio::sync::mpsc::Sender<cargolifter_core::BackendCommand>,
    request: PublishRequest,
    token: &str,
) -> Result<(), axum::http::StatusCode> {
    let (tx, rx) = tokio::sync::oneshot::channel::<bool>();
    match backend
        .send(BackendCommand::Publish(token.into(), request, tx))
        .await
    {
        Ok(_) => match rx.await {
            Ok(result) => {
                if result {
                    Ok(())
                } else {
                    tracing::error!("Failed publish crate");
                    Err(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
                }
            }
            Err(e) => {
                tracing::error!("Failed to receive backend response: {}", e);
                Err(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
            }
        },
        Err(e) => {
            tracing::error!("Failed to send backend command: {}", e);
            Err(axum::http::StatusCode::INTERNAL_SERVER_ERROR)
        }
    }
}