server/src/http/topics.rs

use crate::http::error::CustomError;
use crate::http::jwt::json_web_token::Identity;
use crate::http::mapper;
use crate::http::shared::AppState;
use crate::state::command::EntryCommand;
use crate::streaming::session::Session;
use axum::extract::{Path, State};
use axum::http::StatusCode;
use axum::routing::{delete, get};
use axum::{Extension, Json, Router};
use iggy::identifier::Identifier;
use iggy::models::topic::{Topic, TopicDetails};
use iggy::topics::create_topic::CreateTopic;
use iggy::topics::delete_topic::DeleteTopic;
use iggy::topics::purge_topic::PurgeTopic;
use iggy::topics::update_topic::UpdateTopic;
use iggy::validatable::Validatable;
use std::sync::Arc;

pub fn router(state: Arc<AppState>) -> Router {
    Router::new()
        .route(
            "/streams/:stream_id/topics",
            get(get_topics).post(create_topic),
        )
        .route(
            "/streams/:stream_id/topics/:topic_id",
            get(get_topic).put(update_topic).delete(delete_topic),
        )
        .route(
            "/streams/:stream_id/topics/:topic_id/purge",
            delete(purge_topic),
        )
        .with_state(state)
}

async fn get_topic(
    State(state): State<Arc<AppState>>,
    Extension(identity): Extension<Identity>,
    Path((stream_id, topic_id)): Path<(String, String)>,
) -> Result<Json<TopicDetails>, CustomError> {
    let system = state.system.read().await;
    let stream_id = Identifier::from_str_value(&stream_id)?;
    let topic_id = Identifier::from_str_value(&topic_id)?;
    let topic = system.find_topic(
        &Session::stateless(identity.user_id, identity.ip_address),
        &stream_id,
        &topic_id,
    );
    if topic.is_err() {
        return Err(CustomError::ResourceNotFound);
    }

    let topic = mapper::map_topic(topic?).await;
    Ok(Json(topic))
}

async fn get_topics(
    State(state): State<Arc<AppState>>,
    Extension(identity): Extension<Identity>,
    Path(stream_id): Path<String>,
) -> Result<Json<Vec<Topic>>, CustomError> {
    let stream_id = Identifier::from_str_value(&stream_id)?;
    let system = state.system.read().await;
    let topics = system.find_topics(
        &Session::stateless(identity.user_id, identity.ip_address),
        &stream_id,
    )?;
    let topics = mapper::map_topics(&topics);
    Ok(Json(topics))
}

async fn create_topic(
    State(state): State<Arc<AppState>>,
    Extension(identity): Extension<Identity>,
    Path(stream_id): Path<String>,
    Json(mut command): Json<CreateTopic>,
) -> Result<Json<TopicDetails>, CustomError> {
    command.stream_id = Identifier::from_str_value(&stream_id)?;
    command.validate()?;
    let response;
    {
        let mut system = state.system.write().await;
        let topic = system
            .create_topic(
                &Session::stateless(identity.user_id, identity.ip_address),
                &command.stream_id,
                command.topic_id,
                &command.name,
                command.partitions_count,
                command.message_expiry,
                command.compression_algorithm,
                command.max_topic_size,
                command.replication_factor,
            )
            .await?;
        response = Json(mapper::map_topic(topic).await);
    }

    let system = state.system.read().await;
    system
        .state
        .apply(identity.user_id, EntryCommand::CreateTopic(command))
        .await?;
    Ok(response)
}

async fn update_topic(
    State(state): State<Arc<AppState>>,
    Extension(identity): Extension<Identity>,
    Path((stream_id, topic_id)): Path<(String, String)>,
    Json(mut command): Json<UpdateTopic>,
) -> Result<StatusCode, CustomError> {
    command.stream_id = Identifier::from_str_value(&stream_id)?;
    command.topic_id = Identifier::from_str_value(&topic_id)?;
    command.validate()?;
    {
        let mut system = state.system.write().await;
        system
            .update_topic(
                &Session::stateless(identity.user_id, identity.ip_address),
                &command.stream_id,
                &command.topic_id,
                &command.name,
                command.message_expiry,
                command.compression_algorithm,
                command.max_topic_size,
                command.replication_factor,
            )
            .await?;
    }

    let system = state.system.read().await;
    system
        .state
        .apply(identity.user_id, EntryCommand::UpdateTopic(command))
        .await?;
    Ok(StatusCode::NO_CONTENT)
}

async fn delete_topic(
    State(state): State<Arc<AppState>>,
    Extension(identity): Extension<Identity>,
    Path((stream_id, topic_id)): Path<(String, String)>,
) -> Result<StatusCode, CustomError> {
    let stream_id = Identifier::from_str_value(&stream_id)?;
    let topic_id = Identifier::from_str_value(&topic_id)?;
    {
        let mut system = state.system.write().await;
        system
            .delete_topic(
                &Session::stateless(identity.user_id, identity.ip_address),
                &stream_id,
                &topic_id,
            )
            .await?;
    }

    let system = state.system.read().await;
    system
        .state
        .apply(
            identity.user_id,
            EntryCommand::DeleteTopic(DeleteTopic {
                stream_id,
                topic_id,
            }),
        )
        .await?;
    Ok(StatusCode::NO_CONTENT)
}

async fn purge_topic(
    State(state): State<Arc<AppState>>,
    Extension(identity): Extension<Identity>,
    Path((stream_id, topic_id)): Path<(String, String)>,
) -> Result<StatusCode, CustomError> {
    let stream_id = Identifier::from_str_value(&stream_id)?;
    let topic_id = Identifier::from_str_value(&topic_id)?;
    let system = state.system.read().await;
    system
        .purge_topic(
            &Session::stateless(identity.user_id, identity.ip_address),
            &stream_id,
            &topic_id,
        )
        .await?;
    system
        .state
        .apply(
            identity.user_id,
            EntryCommand::PurgeTopic(PurgeTopic {
                stream_id,
                topic_id,
            }),
        )
        .await?;
    Ok(StatusCode::NO_CONTENT)
}