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use crate::prelude::*;
#[derive(Debug,Clone,Serialize,Deserialize,IntoOwned)]
pub struct ProgressInfo<'pi> {
pub phase: Count<'pi>,
pub item: Count<'pi>,
}
#[derive(Debug,Clone,Serialize,Deserialize,IntoOwned)]
pub struct Count<'pi> {
pub value: Value,
pub desc: Cow<'pi, str>,
}
#[derive(Debug,Clone,Serialize,Deserialize,IntoOwned)]
#[derive(Educe)]
#[educe(Default)]
pub enum Value {
#[educe(Default)] Exact {
i: usize,
n: usize,
},
Fraction {
f: f32,
}
}
impl Value {
pub fn fraction(&self) -> f32 {
match self {
&Value::Exact{ i:_, n } if n == 0 => 0.,
&Value::Exact{ i, n } => (i as f32) / (n as f32),
&Value::Fraction{ f } => f,
}
}
}
pub trait Originator {
fn report(&mut self, info: ProgressInfo<'_>);
fn phase_begin_(&mut self, phase: Count<'_>, len: usize);
fn item_(&mut self, item: usize, desc: Cow<'_, str>);
}
pub struct ResponseOriginator<'c,'w,W,F> where W: Write {
chan: &'c mut ResponseWriter<'w,W>,
phase: Count<'static>,
len: usize,
formatter: F,
}
impl<'c,'w,W,F> ResponseOriginator<'c,'w,W,F> where W: Write {
pub fn new(chan: &'c mut ResponseWriter<'w,W>,
formatter: F) -> Self {
Self {
chan,
phase: Count { value: default(), desc: Cow::Borrowed("") },
len: 0,
formatter,
}
}
}
impl<W,F,M> Originator for ResponseOriginator<'_,'_,W,F>
where W: Write,
F: Fn(ProgressInfo<'_>) -> M,
M: Serialize,
{
fn report(&mut self, pi: ProgressInfo<'_>) {
let resp = (self.formatter)(pi);
self.chan.progress_with(resp).unwrap_or(());
}
fn phase_begin_(&mut self, phase: Count<'_>, len: usize) {
self.phase = phase.into_owned();
self.len = len;
}
fn item_(&mut self, item: usize, desc: Cow<'_, str>) {
let value = Value::Exact { i: item, n: self.len };
self.report(ProgressInfo {
phase: self.phase.clone(),
item: Count { value, desc }
})
}
}
#[allow(unused_variables)]
impl Originator for () {
fn report(&mut self, pi: ProgressInfo<'_>) { }
fn phase_begin_(&mut self, phase: Count<'_>, len: usize) { }
fn item_(&mut self, item: usize, desc: Cow<'_, str>) { }
}
pub trait Enum: EnumCount + ToPrimitive + EnumMessage { }
impl<T> From<T> for Count<'static> where T: Enum {
fn from(t: T) -> Count<'static> {
let value = Value::Exact {
i: t.to_usize().unwrap(),
n: T::COUNT - 1,
};
Count {
value,
desc: Cow::Owned(t.get_message().unwrap_or("...").to_owned()),
}
}
}
impl<'t> From<&'t str> for Count<'t> {
fn from(s: &'t str) -> Count<'t> {
Count { value: default(), desc: Cow::Borrowed(s) }
}
}
impl From<String> for Count<'static> {
fn from(s: String) -> Count<'static> {
Count { value: default(), desc: Cow::Owned(s) }
}
}
impl<'t> From<()> for Count<'t> { fn from(_:()) -> Count<'t> {
Count { value: default(), desc: Cow::Borrowed("") }
} }
#[ext(pub, name=OriginatorExt)]
impl &'_ mut (dyn Originator + '_) {
fn phase_item<'p,'e,P,E>(&mut self, phase: P, item: E)
where P: Into<Count<'p>>,
E: Into<Count<'e>>,
{
let phase = phase.into();
let item = item .into();
self.report(ProgressInfo { phase, item });
}
fn phase<'p,P>(&mut self, phase: P, len: usize)
where P: Into<Count<'p>>,
{
self.phase_begin_(phase.into(), len)
}
fn item<'s,S>(&mut self, item: usize, desc: S)
where S: Into<Cow<'s, str>>,
{
self.item_(item, desc.into())
}
}
pub struct ReadOriginator<'o,R:Read> {
r: R,
total_len: usize,
orig: &'o mut dyn Originator,
counter: usize,
last_report: usize,
}
impl<'oo,'o,R:Read> ReadOriginator<'o,R> {
pub fn new<'p,P>(mut orig: &'o mut dyn Originator, phase: P,
total_len: usize, r: R) -> Self
where P: Into<Count<'p>>
{
orig.phase(phase, total_len);
let mut ro = ReadOriginator {
r, orig, total_len,
counter: 0,
last_report: 0,
};
ro.report();
ro
}
fn report(&mut self) {
let t = self.total_len.to_string();
let c = format!("{:>width$}", self.counter, width=t.len());
let m = |s: String| {
izip!( iter::once("").chain(["",""," "].iter().cloned().cycle()),
s.chars().rev() )
.map(|(s,c)| [s.chars().next(), Some(c)])
.flatten()
.flatten()
.collect::<String>()
.chars().rev()
.collect::<String>()
};
let desc = format!(" {} of {}", m(c), m(t));
self.orig.item(self.counter, desc);
self.last_report = self.counter;
}
}
impl<R:Read> Read for ReadOriginator<'_,R> {
#[throws(io::Error)]
fn read(&mut self, buf: &mut [u8]) -> usize {
let got = self.r.read(buf)?;
self.counter += got;
if self.counter - self.last_report > 10000 {
self.report();
}
got
}
}
