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use axum::extract::{Multipart, Path};
use axum::http::StatusCode;
use axum::response::{IntoResponse, Response};
use axum::{body, Extension, Json};
use diesel::OptionalExtension;
use rand::distributions::Alphanumeric;
use rand::Rng;
use serde::{Deserialize, Serialize};
use serde_json::{self, json, value::Value as JsonValue};
use std::io::Cursor;
use std::path::PathBuf;
use std::sync::Arc;
use thiserror;
use crate::db;
use crate::db::bots::{self, BotVersion};
use crate::db::ratings::{self, RankedBot};
use crate::db::users::User;
use crate::modules::bots::save_code_string;
use crate::{DatabaseConnection, GlobalConfig};
use bots::Bot;
use super::users::UserData;
#[derive(Serialize, Deserialize, Debug)]
pub struct SaveBotParams {
pub bot_name: String,
pub code: String,
}
#[derive(Debug, thiserror::Error)]
pub enum SaveBotError {
#[error("database error")]
DatabaseError(#[from] diesel::result::Error),
#[error("validation failed")]
ValidationFailed(Vec<&'static str>),
#[error("bot name already exists")]
BotNameTaken,
}
impl IntoResponse for SaveBotError {
fn into_response(self) -> Response {
let (status, value) = match self {
SaveBotError::BotNameTaken => (
StatusCode::FORBIDDEN,
json!({ "error": {
"type": "bot_name_taken",
} }),
),
SaveBotError::DatabaseError(_e) => (
StatusCode::INTERNAL_SERVER_ERROR,
json!({ "error": {
"type": "internal_server_error",
} }),
),
SaveBotError::ValidationFailed(errors) => (
StatusCode::UNPROCESSABLE_ENTITY,
json!({ "error": {
"type": "validation_failed",
"validation_errors": errors,
} }),
),
};
let encoded = serde_json::to_vec(&value).expect("could not encode response value");
Response::builder()
.status(status)
.body(body::boxed(body::Full::from(encoded)))
.expect("could not build response")
}
}
pub fn validate_bot_name(bot_name: &str) -> Result<(), SaveBotError> {
let mut errors = Vec::new();
if bot_name.len() < 3 {
errors.push("bot name must be at least 3 characters long");
}
if bot_name.len() > 32 {
errors.push("bot name must be at most 32 characters long");
}
if !bot_name
.chars()
.all(|c| !c.is_uppercase() && (c.is_ascii_alphanumeric() || c == '_' || c == '-'))
{
errors.push("only lowercase alphanumeric characters, underscores, and dashes are allowed in bot names");
}
if errors.is_empty() {
Ok(())
} else {
Err(SaveBotError::ValidationFailed(errors))
}
}
pub async fn save_bot(
Json(params): Json<SaveBotParams>,
user: User,
conn: DatabaseConnection,
Extension(config): Extension<Arc<GlobalConfig>>,
) -> Result<Json<Bot>, SaveBotError> {
let res = bots::find_bot_by_name(¶ms.bot_name, &conn)
.optional()
.expect("could not run query");
let bot = match res {
Some(existing_bot) => {
if existing_bot.owner_id == Some(user.id) {
existing_bot
} else {
return Err(SaveBotError::BotNameTaken);
}
}
None => {
validate_bot_name(¶ms.bot_name)?;
let new_bot = bots::NewBot {
owner_id: Some(user.id),
name: ¶ms.bot_name,
};
bots::create_bot(&new_bot, &conn).expect("could not create bot")
}
};
let _code_bundle = save_code_string(¶ms.code, Some(bot.id), &conn, &config)
.expect("failed to save code bundle");
Ok(Json(bot))
}
#[derive(Serialize, Deserialize, Debug)]
pub struct BotParams {
name: String,
}
// TODO: can we unify this with save_bot?
pub async fn create_bot(
conn: DatabaseConnection,
user: User,
params: Json<BotParams>,
) -> Result<(StatusCode, Json<Bot>), SaveBotError> {
validate_bot_name(¶ms.name)?;
let existing_bot = bots::find_bot_by_name(¶ms.name, &conn)
.optional()
.expect("could not run query");
if existing_bot.is_some() {
return Err(SaveBotError::BotNameTaken);
}
let bot_params = bots::NewBot {
owner_id: Some(user.id),
name: ¶ms.name,
};
let bot = bots::create_bot(&bot_params, &conn).unwrap();
Ok((StatusCode::CREATED, Json(bot)))
}
// TODO: handle errors
pub async fn get_bot(
conn: DatabaseConnection,
Path(bot_name): Path<String>,
) -> Result<Json<JsonValue>, StatusCode> {
let bot = db::bots::find_bot_by_name(&bot_name, &conn).map_err(|_| StatusCode::NOT_FOUND)?;
let owner: Option<UserData> = match bot.owner_id {
Some(user_id) => {
let user = db::users::find_user(user_id, &conn)
.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
Some(user.into())
}
None => None,
};
let versions =
bots::find_bot_versions(bot.id, &conn).map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
Ok(Json(json!({
"bot": bot,
"owner": owner,
"versions": versions,
})))
}
pub async fn get_user_bots(
conn: DatabaseConnection,
Path(user_name): Path<String>,
) -> Result<Json<Vec<Bot>>, StatusCode> {
let user =
db::users::find_user_by_name(&user_name, &conn).map_err(|_| StatusCode::NOT_FOUND)?;
db::bots::find_bots_by_owner(user.id, &conn)
.map(Json)
.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)
}
/// List all active bots
pub async fn list_bots(conn: DatabaseConnection) -> Result<Json<Vec<Bot>>, StatusCode> {
bots::find_active_bots(&conn)
.map(Json)
.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)
}
pub async fn get_ranking(conn: DatabaseConnection) -> Result<Json<Vec<RankedBot>>, StatusCode> {
ratings::get_bot_ranking(&conn)
.map(Json)
.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)
}
// TODO: currently this only implements the happy flow
pub async fn upload_code_multipart(
conn: DatabaseConnection,
user: User,
Path(bot_name): Path<String>,
mut multipart: Multipart,
Extension(config): Extension<Arc<GlobalConfig>>,
) -> Result<Json<BotVersion>, StatusCode> {
let bots_dir = PathBuf::from(&config.bots_directory);
let bot = bots::find_bot_by_name(&bot_name, &conn).map_err(|_| StatusCode::NOT_FOUND)?;
if Some(user.id) != bot.owner_id {
return Err(StatusCode::FORBIDDEN);
}
let data = multipart
.next_field()
.await
.map_err(|_| StatusCode::BAD_REQUEST)?
.ok_or(StatusCode::BAD_REQUEST)?
.bytes()
.await
.map_err(|_| StatusCode::BAD_REQUEST)?;
// TODO: this random path might be a bit redundant
let folder_name: String = rand::thread_rng()
.sample_iter(&Alphanumeric)
.take(16)
.map(char::from)
.collect();
zip::ZipArchive::new(Cursor::new(data))
.map_err(|_| StatusCode::BAD_REQUEST)?
.extract(bots_dir.join(&folder_name))
.map_err(|_| StatusCode::BAD_REQUEST)?;
let bot_version = bots::NewBotVersion {
bot_id: Some(bot.id),
code_bundle_path: Some(&folder_name),
container_digest: None,
};
let code_bundle =
bots::create_bot_version(&bot_version, &conn).expect("Failed to create code bundle");
Ok(Json(code_bundle))
}
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