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

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    // Copyright (C) 2024// Copyright (C) 2024  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::mcaptcha::easy::{
        update_runner, TrafficPatternRequest, UpdateTrafficPattern,
    };
    use crate::*;

    use errors::*;

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

    impl UpdateEasyCaptcha {
        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(());
        }

        /// update configurations
        async fn update_captcha_configurations(
            data: &AppData,
            rx: &mut Receiver<()>,
        ) -> ServiceResult<()> {
            let limit = 10;
            let mut offset = 0;
            let mut page = 0;
            loop {
                offset = page * limit;

                if !Self::can_run(rx) {
                    return Ok(());
                }

                let mut patterns = data.db.get_all_easy_captchas(limit, offset).await?;
                if patterns.is_empty() {
                    break;
                }
                for pattern in patterns.drain(0..) {
                    if !Self::can_run(rx) {
                        return Ok(());
                    }

                    let publish_benchmarks =
                        data.db.analytics_captcha_is_published(&pattern.key).await?;

                    let req = UpdateTrafficPattern {
                        pattern: TrafficPatternRequest {
                            avg_traffic: pattern.traffic_pattern.avg_traffic,
                            peak_sustainable_traffic: pattern
                                .traffic_pattern
                                .peak_sustainable_traffic,
                            broke_my_site_traffic: pattern
                                .traffic_pattern
                                .broke_my_site_traffic,
                            description: pattern.description,
                            publish_benchmarks,
                        },
                        key: pattern.key,
                    };
                    if !Self::can_run(rx) {
                        return Ok(());
                    }

                    update_runner(&data, req, pattern.username).await?;
                }
                page += 1;
            }
            Ok(())
        }

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

        pub async fn run(
            data: AppData,
            duration: u32,
            mut rx: Receiver<()>,
        ) -> ServiceResult<JoinHandle<()>> {
            let mut exit = false;
            let fut = async move {
                loop {
                    if exit {
                        break;
                    }
                    for _ in 0..duration {
                        if Self::can_run(&mut rx) {
                            sleep(Duration::new(1, 0)).await;
                            continue;
                        } else {
                            exit = true;
                            break;
                        }
                    }

                    if let Some(err) = Self::update_captcha_configurations(&data, &mut rx)
                        .await
                        .err()
                    {
                        log::error!(
                            "Tried to update easy captcha configurations in background {:?}",
                            err
                        );
                    }
                }
            };
            let handle = spawn(fut);
            Ok(handle)
        }
    }