You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: telemetry.rs
    path of file: ./repos/zed/crates/client/src
    
    the code of the file until where you have to start completion: mod event_coalescer;

use crate::{ChannelId, TelemetrySettings};
use chrono::{DateTime, Utc};
use clock::SystemClock;
use futures::Future;
use gpui::{AppContext, AppMetadata, BackgroundExecutor, Task};
use once_cell::sync::Lazy;
use parking_lot::Mutex;
use release_channel::ReleaseChannel;
use settings::{Settings, SettingsStore};
use sha2::{Digest, Sha256};
use std::io::Write;
use std::{env, mem, path::PathBuf, sync::Arc, time::Duration};
use sysinfo::{
    CpuRefreshKind, Pid, PidExt, ProcessExt, ProcessRefreshKind, RefreshKind, System, SystemExt,
};
use telemetry_events::{
    ActionEvent, AppEvent, AssistantEvent, AssistantKind, CallEvent, CopilotEvent, CpuEvent,
    EditEvent, EditorEvent, Event, EventRequestBody, EventWrapper, MemoryEvent, SettingEvent,
};
use tempfile::NamedTempFile;
use util::http::{self, HttpClient, HttpClientWithUrl, Method};
#[cfg(not(debug_assertions))]
use util::ResultExt;
use util::TryFutureExt;

use self::event_coalescer::EventCoalescer;

pub struct Telemetry {
    clock: Arc<dyn SystemClock>,
    http_client: Arc<HttpClientWithUrl>,
    executor: BackgroundExecutor,
    state: Arc<Mutex<TelemetryState>>,
}

struct TelemetryState {
    settings: TelemetrySettings,
    metrics_id: Option<Arc<str>>,      // Per logged-in user
    installation_id: Option<Arc<str>>, // Per app installation (different for dev, nightly, preview, and stable)
    session_id: Option<String>,        // Per app launch
    release_channel: Option<&'static str>,
    app_metadata: AppMetadata,
    architecture: &'static str,
    events_queue: Vec<EventWrapper>,
    flush_events_task: Option<Task<()>>,
    log_file: Option<NamedTempFile>,
    is_staff: Option<bool>,
    first_event_date_time: Option<DateTime<Utc>>,
    event_coalescer: EventCoalescer,
    max_queue_size: usize,
}

#[cfg(debug_assertions)]
const MAX_QUEUE_LEN: usize = 5;

#[cfg(not(debug_assertions))]
const MAX_QUEUE_LEN: usize = 50;

#[cfg(debug_assertions)]
const FLUSH_INTERVAL: Duration = Duration::from_secs(1);

#[cfg(not(debug_assertions))]
const FLUSH_INTERVAL: Duration = Duration::from_secs(60 * 5);
static ZED_CLIENT_CHECKSUM_SEED: Lazy<Option<Vec<u8>>> = Lazy::new(|| {
    option_env!("ZED_CLIENT_CHECKSUM_SEED")
        .map(|s| s.as_bytes().into())
        .or_else(|| {
            env::var("ZED_CLIENT_CHECKSUM_SEED")
                .ok()
                .map(|s| s.as_bytes().into())
        })
});

impl Telemetry {
    pub fn new(
        clock: Arc<dyn SystemClock>,
        client: Arc<HttpClientWithUrl>,
        cx: &mut AppContext,
    ) -> Arc<Self> {
        let release_channel =
            ReleaseChannel::try_global(cx).map(|release_channel| release_channel.display_name());

        TelemetrySettings::register(cx);

        let state = Arc::new(Mutex::new(Telemet
    
    pub fn flush_events(self: &Arc<Self>) {
        let mut state = self.state.lock();
        state.first_event_date_time = None;
        let mut events = mem::take(&mut state.events_queue);
        state.flush_events_task.take();
        drop(state);
        if events.is_empty() {
            return;
        }

        let Some(checksum_seed) = &*ZED_CLIENT_CHECKSUM_SEED else {
            return;
        };

        let this = self.clone();
        self.executor
            .spawn(
                async move {
                    let mut json_bytes = Vec::new();

                    if let Some(file) = &mut this.state.lock().log_file {
                        let file = file.as_file_mut();
                        for event in &mut events {
                            json_bytes.clear();
                            serde_json::to_writer(&mut json_bytes, event)?;
                            file.write_all(&json_bytes)?;
                            file.write_all(b"\n")?;
                        }
                    }

                    {
                        let state = this.state.lock();
                        let request_body = EventRequestBody {
                            installation_id: state.installation_id.as_deref().map(Into::into),
                            session_id: state.session_id.clone(),
                            is_staff: state.is_staff,
                            app_version: state
                                .app_metadata
                                .app_version
                                .unwrap_or_default()
                                .to_string(),
                            os_name: state.app_metadata.os_name.to_string(),
                            os_version: state
                                .app_metadata
                                .os_version
                                .map(|version| version.to_string()),
                            architecture: state.architecture.to_string(),

                            release_channel: state.release_channel.map(Into::into),
                            events,
                        };
                        json_bytes.clear();
                        serde_json::to_writer(&mut json_bytes, &request_body)?;
                    }

                    let mut summer = Sha256::new();
                    summer.update(checksum_seed);
                    summer.update(&json_bytes);
                    summer.update(checksum_seed);
                    let mut checksum = String::new();
                    for byte in summer.finalize().as_slice() {
                        use std::fmt::Write;
                        write!(&mut checksum, "{:02x}", byte).unwrap();
                    }

                    let request = http::Request::builder()
                        .method(Method::POST)
                        .uri(this.http_client.build_zed_api_url("/telemetry/events"))
                        .header("Content-Type", "text/plain")
                        .header("x-zed-checksum", checksum)
                        .body(json_bytes.into());

                    let response = this.http_client.send(request?).await?;
                    if response.status() != 200 {
                        log::error!("Failed to send events: HTTP {:?}", response.status());
                    }
                    anyhow::Ok(())
                }
                .log_err(),
            )
            .detach();
    }