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Implement subscription::channel and simplify unfold

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Héctor Ramón Jiménez 2023-04-11 07:46:54 +02:00
parent ff24f9040c
commit ae7e6b3d48
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GPG key ID: 140CC052C94F138E
3 changed files with 121 additions and 85 deletions
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17
examples/download_progress/src/download.rs
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@ -18,10 +18,7 @@ pub struct Download<I> {
url: String,
}
async fn download<I: Copy>(
id: I,
state: State,
) -> (Option<(I, Progress)>, State) {
async fn download<I: Copy>(id: I, state: State) -> ((I, Progress), State) {
match state {
State::Ready(url) => {
let response = reqwest::get(&url).await;
@ -30,7 +27,7 @@ async fn download<I: Copy>(
Ok(response) => {
if let Some(total) = response.content_length() {
(
Some((id, Progress::Started)),
(id, Progress::Started),
State::Downloading {
response,
total,
@ -38,10 +35,10 @@ async fn download<I: Copy>(
},
)
} else {
(Some((id, Progress::Errored)), State::Finished)
((id, Progress::Errored), State::Finished)
}
}
Err(_) => (Some((id, Progress::Errored)), State::Finished),
Err(_) => ((id, Progress::Errored), State::Finished),
}
}
State::Downloading {
@ -55,7 +52,7 @@ async fn download<I: Copy>(
let percentage = (downloaded as f32 / total as f32) * 100.0;
(
Some((id, Progress::Advanced(percentage))),
(id, Progress::Advanced(percentage)),
State::Downloading {
response,
total,
@ -63,8 +60,8 @@ async fn download<I: Copy>(
},
)
}
Ok(None) => (Some((id, Progress::Finished)), State::Finished),
Err(_) => (Some((id, Progress::Errored)), State::Finished),
Ok(None) => ((id, Progress::Finished), State::Finished),
Err(_) => ((id, Progress::Errored), State::Finished),
},
State::Finished => {
// We do not let the stream die, as it would start a