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use iced::futures::{SinkExt, Stream, StreamExt};
use iced::stream::try_channel;
use iced::Subscription;
use std::hash::Hash;
use std::sync::Arc;
// Just a little utility function
pub fn file<I: 'static + Hash + Copy + Send + Sync, T: ToString>(
id: I,
url: T,
) -> iced::Subscription<(I, Result<Progress, Error>)> {
Subscription::run_with_id(
id,
download(url.to_string()).map(move |progress| (id, progress)),
)
}
fn download(url: String) -> impl Stream<Item = Result<Progress, Error>> {
try_channel(1, move |mut output| async move {
let response = reqwest::get(&url).await?;
let total = response.content_length().ok_or(Error::NoContentLength)?;
let _ = output.send(Progress::Downloading { percent: 0.0 }).await;
let mut byte_stream = response.bytes_stream();
let mut downloaded = 0;
while let Some(next_bytes) = byte_stream.next().await {
let bytes = next_bytes?;
downloaded += bytes.len();
let _ = output
.send(Progress::Downloading {
percent: 100.0 * downloaded as f32 / total as f32,
})
.await;
}
let _ = output.send(Progress::Finished).await;
Ok(())
})
}
#[derive(Debug, Clone)]
pub enum Progress {
Downloading { percent: f32 },
Finished,
}
#[derive(Debug, Clone)]
pub enum Error {
RequestFailed(Arc<reqwest::Error>),
NoContentLength,
}
impl From<reqwest::Error> for Error {
fn from(error: reqwest::Error) -> Self {
Error::RequestFailed(Arc::new(error))
}
}
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