# demo.rs - source
Source of the Rust file `src/demo.rs`.

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    // Copyright (C) 2022  Aravinth Manivannan <realaravinth@batsense.net>
    // SPDX-FileCopyrightText: 2023 Aravinth Manivannan <realaravinth@batsense.net>
    //
    // SPDX-License-Identifier: AGPL-3.0-or-later

    use std::time::Duration;
    //use std::sync::atomicBool

    use actix::clock::sleep;
    use actix::spawn;
    use tokio::sync::oneshot::{channel, error::TryRecvError, Receiver, Sender};
    use tokio::task::JoinHandle;

    use crate::api::v1::account::delete::runners::delete_user;
    use crate::api::v1::account::{username::runners::username_exists, AccountCheckPayload};
    use crate::api::v1::auth::runners::{register_runner, Register};
    use crate::*;

    use errors::*;

    /// Demo username
    pub const DEMO_USER: &str = "aaronsw";
    /// Demo password
    pub const DEMO_PASSWORD: &str = "password";

    pub struct DemoUser {
        tx: Sender<()>,
    }

    impl DemoUser {
        pub async fn spawn(
            data: AppData,
            duration: u32,
        ) -> ServiceResult<(Self, JoinHandle<()>)> {
            let (tx, rx) = channel();
            let handle = Self::run(data, duration, rx).await?;
            let d = Self { tx };

            Ok((d, handle))
        }

        #[allow(dead_code)]
        pub fn abort(mut self) {
            self.tx.send(());
        }

        /// register demo user runner
        async fn register_demo_user(data: &AppData) -> ServiceResult<()> {
            let user_exists_payload = AccountCheckPayload {
                val: DEMO_USER.into(),
            };

            if !username_exists(&user_exists_payload, data).await?.exists {
                let register_payload = Register {
                    username: DEMO_USER.into(),
                    password: DEMO_PASSWORD.into(),
                    confirm_password: DEMO_PASSWORD.into(),
                    email: None,
                };

                log::info!("Registering demo user");
                match register_runner(&register_payload, data).await {
                    Err(ServiceError::UsernameTaken) | Ok(_) => Ok(()),
                    Err(e) => Err(e),
                }
            } else {
                Ok(())
            }
        }

        async fn delete_demo_user(data: &AppData) -> ServiceResult<()> {
            log::info!("Deleting demo user");
            delete_user(DEMO_USER, data).await?;
            Ok(())
        }

        pub async fn run(
            data: AppData,
            duration: u32,
            mut rx: Receiver<()>,
        ) -> ServiceResult<JoinHandle<()>> {
            Self::register_demo_user(&data).await?;

            fn can_run(rx: &mut Receiver<()>) -> bool {
                match rx.try_recv() {
                    Err(TryRecvError::Empty) => true,
                    _ => false,
                }
            }

            let mut exit = false;
            let fut = async move {
                loop {
                    if exit {
                        break;
                    }
                    for _ in 0..duration {
                        if can_run(&mut rx) {
                            sleep(Duration::new(1, 0)).await;
                            continue;
                        } else {
                            exit = true;
                            break;
                        }
                    }

                    if let Err(e) = Self::delete_demo_user(&data).await {
                        log::error!("Error while deleting demo user: {:?}", e);
                    }

                    if let Err(e) = Self::register_demo_user(&data).await {
                        log::error!("Error while registering demo user: {:?}", e);
                    }
                }
            };
            let handle = spawn(fut);
            Ok(handle)
        }
    }

    #[cfg(test)]
    mod tests {

        use actix_web::test;
        use libmcaptcha::defense::Level;

        use super::*;
        use crate::tests::*;

        const DURATION: u64 = 25;

        #[actix_rt::test]
        async fn demo_account_works_pg() {
            let data = crate::tests::pg::get_data().await;
            demo_account_works(data).await;
        }

        #[actix_rt::test]
        async fn demo_account_works_maria() {
            let data = crate::tests::maria::get_data().await;
            demo_account_works(data).await;
        }

        async fn demo_account_works(data_inner: ArcData) {
            let data_inner = &data_inner;
            let data = AppData::new(data_inner.clone());
            crate::tests::delete_user(data_inner, DEMO_USER).await;
            let duration = Duration::from_secs(DURATION);

            // register works
            DemoUser::register_demo_user(&data).await.unwrap();
            let payload = AccountCheckPayload {
                val: DEMO_USER.into(),
            };
            assert!(username_exists(&payload, &data).await.unwrap().exists);
            signin(data_inner, DEMO_USER, DEMO_PASSWORD).await;

            // deletion works
            assert!(DemoUser::delete_demo_user(&data).await.is_ok());
            assert!(!username_exists(&payload, &data).await.unwrap().exists);

            // test the runner
            let user = DemoUser::spawn(data, DURATION as u32).await.unwrap();
            let (_, signin_resp, token_key) =
                add_levels_util(data_inner, DEMO_USER, DEMO_PASSWORD).await;
            let cookies = get_cookie!(signin_resp);
            let app = get_app!(data_inner).await;

            let resp = test::call_service(
                &app,
                post_request!(&token_key, crate::V1_API_ROUTES.captcha.get)
                    .cookie(cookies.clone())
                    .to_request(),
            )
            .await;
            assert_eq!(resp.status(), StatusCode::OK);
            let res_levels: Vec<Level> = test::read_body_json(resp).await;
            assert!(!res_levels.is_empty());

            sleep(Duration::from_secs(DURATION * 2)).await;

            let resp = test::call_service(
                &app,
                post_request!(&token_key, crate::V1_API_ROUTES.captcha.get)
                    .cookie(cookies)
                    .to_request(),
            )
            .await;
            assert_eq!(resp.status(), StatusCode::OK);
            let res_levels: Vec<Level> = test::read_body_json(resp).await;
            assert!(res_levels.is_empty());
            user.0.abort();
            user.1.await.unwrap();
        }
    }