From 911284c8ae09c14f089be786de1716269c7e04c7 Mon Sep 17 00:00:00 2001
From: Untone <anton.rewin@gmail.com>
Date: Wed, 23 Oct 2024 12:34:34 +0300
Subject: [PATCH] detect-old-width

---
 Cargo.lock       |  2 +-
 Cargo.toml       |  2 +-
 src/thumbnail.rs | 34 +++++++++++++++++++++++++---------
 3 files changed, 27 insertions(+), 11 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 9be320f..9f844cd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1273,7 +1273,7 @@ dependencies = [
 
 [[package]]
 name = "discoursio-quoter"
-version = "0.0.8"
+version = "0.0.9"
 dependencies = [
  "actix",
  "actix-multipart",
diff --git a/Cargo.toml b/Cargo.toml
index 1c3b93f..a4b07e1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "discoursio-quoter"
-version = "0.0.8"
+version = "0.0.9"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/src/thumbnail.rs b/src/thumbnail.rs
index b7515b0..4a64332 100644
--- a/src/thumbnail.rs
+++ b/src/thumbnail.rs
@@ -1,19 +1,35 @@
 use actix_web::error::ErrorInternalServerError;
 use image::{imageops::FilterType, DynamicImage};
-use std::{collections::HashMap, io::Cursor};
+use std::{cmp::max, collections::HashMap, io::Cursor};
 
-pub const THUMB_WIDTHS: [u32; 6] = [10, 40, 110, 300, 600, 800];
+pub const THUMB_WIDTHS: [u32; 7] = [10, 40, 110, 300, 600, 800, 1400];
 
 /// Парсит запрос на миниатюру, извлекая оригинальное имя файла и требуемую ширину.
-/// Пример: "filename_150.ext" -> ("filename.ext", 150)
+/// Пример: "filename_150.ext" -> ("filename", 150, "ext")
+/// unsafe/1440x/production/image/439efaa0-816f-11ef-b201-439da98539bc.jpg -> ("439efaa0-816f-11ef-b201-439da98539bc", 1440, "jpg")
 pub fn parse_image_request(path: &str) -> Option<(String, u32, String)> {
-    if let Some((name_part, ext_part)) = path.rsplit_once('.') {
-        if let Some((base_name, width_str)) = name_part.rsplit_once('_') {
-            if let Ok(width) = width_str.parse::<u32>() {
-                return Some((base_name.to_string(), width, ext_part.to_string()));
+    let mut path_parts = path.rsplit('/').collect::<Vec<&str>>();
+    if let Some(filename_part) = path_parts.pop() {
+        let mut oldwidth = 0;
+        if path.starts_with("unsafe") {
+            if let Some(old_width_str) = path_parts.get(1) {
+            let mut old_width_str = old_width_str.to_string();
+            if old_width_str.ends_with('x') {
+                old_width_str.pop();
+                if let Ok(width) = old_width_str.parse::<u32>() {
+                    oldwidth = width;
+                    }
+                }
             }
         }
-        return Some((name_part.to_string(), 0, ext_part.to_string().to_lowercase()));
+        if let Some((name_part, ext_part)) = filename_part.rsplit_once('.') {
+            if let Some((base_name, width_str)) = name_part.rsplit_once('_') {
+                if let Ok(width) = width_str.parse::<u32>() {
+                    return Some((base_name.to_string(), max(width, oldwidth), ext_part.to_string()));
+                }
+            }
+            return Some((name_part.to_string(), 0, ext_part.to_string().to_lowercase()));
+        }
     }
     None
 }
@@ -30,7 +46,7 @@ pub fn find_closest_width(requested_width: u32) -> u32 {
 pub async fn generate_thumbnails(image: &DynamicImage) -> Result<HashMap<u32, Vec<u8>>, actix_web::Error> {
     let mut thumbnails = HashMap::new();
 
-    for width in THUMB_WIDTHS {
+    for &width in THUMB_WIDTHS.iter().filter(|&&w| w < image.width()) {
         let thumbnail = image.resize(width, u32::MAX, FilterType::Lanczos3); // Ресайз изображения по ширине
         let mut buffer = Vec::new();
         thumbnail