torrust-index 3.0.0

A BitTorrent Index
Documentation 
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//! Image cache proxy.
//!
//! The image cache proxy is a service that allows users to proxy images
//! through the server.
//!
//! Sample URL:
//!
//! <http://0.0.0.0:3001/v1/proxy/image/https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2F2%2F21%2FMandel_zoom_00_mandelbrot_set.jpg%2F1280px-Mandel_zoom_00_mandelbrot_set.jpg>
use std::sync::Arc;

use bytes::Bytes;

use super::authorization::{self, ACTION};
use crate::cache::image::manager::{Error, ImageCacheService};
use crate::models::user::UserId;

pub struct Service {
    image_cache_service: Arc<ImageCacheService>,
    authorization_service: Arc<authorization::Service>,
}

impl Service {
    #[must_use]
    pub fn new(image_cache_service: Arc<ImageCacheService>, authorization_service: Arc<authorization::Service>) -> Self {
        Self {
            image_cache_service,
            authorization_service,
        }
    }

    /// It gets image by URL and caches it.
    ///
    /// # Errors
    ///
    /// It returns an error if:
    ///
    /// * The image URL is unreachable.
    /// * The image URL is not an image.
    /// * The image is too big.
    /// * The user quota is met.
    pub async fn get_image_by_url(&self, url: &str, maybe_user_id: Option<UserId>) -> Result<Bytes, Error> {
        let Some(user_id) = maybe_user_id else {
            return Err(Error::Unauthenticated);
        };

        self.authorization_service
            .authorize(ACTION::GetImageByUrl, maybe_user_id)
            .await
            .map_err(|_| Error::Unauthenticated)?;

        self.image_cache_service.get_image_by_url(url, user_id).await
    }
}