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|
use bytes::Bytes;
use serde::Deserialize;
use sipper::{sipper, Straw};
use tokio::task;
use std::fmt;
use std::io;
use std::sync::Arc;
#[derive(Debug, Clone, Deserialize)]
pub struct Image {
pub id: Id,
url: String,
hash: String,
}
impl Image {
pub const LIMIT: usize = 99;
pub async fn list() -> Result<Vec<Self>, Error> {
let client = reqwest::Client::new();
#[derive(Deserialize)]
struct Response {
items: Vec<Image>,
}
let response: Response = client
.get("https://civitai.com/api/v1/images")
.query(&[
("sort", "Most Reactions"),
("period", "Week"),
("nsfw", "None"),
("limit", &Image::LIMIT.to_string()),
])
.send()
.await?
.error_for_status()?
.json()
.await?;
Ok(response.items)
}
pub async fn blurhash(
self,
width: u32,
height: u32,
) -> Result<Blurhash, Error> {
task::spawn_blocking(move || {
let pixels = blurhash::decode(&self.hash, width, height, 1.0)?;
Ok::<_, Error>(Blurhash {
rgba: Rgba {
width,
height,
pixels: Bytes::from(pixels),
},
})
})
.await?
}
pub fn download(self, size: Size) -> impl Straw<Rgba, Blurhash, Error> {
sipper(move |mut sender| async move {
let client = reqwest::Client::new();
if let Size::Thumbnail { width, height } = size {
let image = self.clone();
drop(task::spawn(async move {
if let Ok(blurhash) = image.blurhash(width, height).await {
sender.send(blurhash).await;
}
}));
}
let bytes = client
.get(match size {
Size::Original => self.url,
Size::Thumbnail { width, .. } => self
.url
.split("/")
.map(|part| {
if part.starts_with("width=") {
format!("width={}", width * 2) // High DPI
} else {
part.to_owned()
}
})
.collect::<Vec<_>>()
.join("/"),
})
.send()
.await?
.error_for_status()?
.bytes()
.await?;
let image = task::spawn_blocking(move || {
Ok::<_, Error>(
image::ImageReader::new(io::Cursor::new(bytes))
.with_guessed_format()?
.decode()?
.to_rgba8(),
)
})
.await??;
Ok(Rgba {
width: image.width(),
height: image.height(),
pixels: Bytes::from(image.into_raw()),
})
})
}
}
#[derive(
Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Deserialize,
)]
pub struct Id(u32);
#[derive(Debug, Clone)]
pub struct Blurhash {
pub rgba: Rgba,
}
#[derive(Clone)]
pub struct Rgba {
pub width: u32,
pub height: u32,
pub pixels: Bytes,
}
impl fmt::Debug for Rgba {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Rgba")
.field("width", &self.width)
.field("height", &self.height)
.finish()
}
}
#[derive(Debug, Clone, Copy)]
pub enum Size {
Original,
Thumbnail { width: u32, height: u32 },
}
#[derive(Debug, Clone)]
#[allow(dead_code)]
pub enum Error {
RequestFailed(Arc<reqwest::Error>),
IOFailed(Arc<io::Error>),
JoinFailed(Arc<task::JoinError>),
ImageDecodingFailed(Arc<image::ImageError>),
BlurhashDecodingFailed(Arc<blurhash::Error>),
}
impl From<reqwest::Error> for Error {
fn from(error: reqwest::Error) -> Self {
Self::RequestFailed(Arc::new(error))
}
}
impl From<io::Error> for Error {
fn from(error: io::Error) -> Self {
Self::IOFailed(Arc::new(error))
}
}
impl From<task::JoinError> for Error {
fn from(error: task::JoinError) -> Self {
Self::JoinFailed(Arc::new(error))
}
}
impl From<image::ImageError> for Error {
fn from(error: image::ImageError) -> Self {
Self::ImageDecodingFailed(Arc::new(error))
}
}
impl From<blurhash::Error> for Error {
fn from(error: blurhash::Error) -> Self {
Self::BlurhashDecodingFailed(Arc::new(error))
}
}
|
