caching, i think (i genuinely dont remember what half of this does but i know it works)

src/cache.rs

@@ -1,32 +1,57 @@
-use std::{fs, process, path::Path};
+use std::{fs, path::Path, process};
 
-pub async fn download_image(cache_path: &str, image_url: String, file_name: String) {
+use crate::Page;
+
+pub async fn download_page_image(cache_path: &str, page: &Page) {
     let replaced = cache_path.replace('~', &crate::get_home()[..]); // replace ~ with $HOME
     crate::ensure_exists(&replaced);
 
-    if Path::new(&format!("{cache_path}/{file_name}.json")).exists() {
-        return
+    if Path::new(&format!("{cache_path}/{}.json", page.date)).exists() {
+        return;
     }
 
-    let image = match reqwest::get(image_url).await {
+    let image = match reqwest::get(&page.image).await {
         Ok(image) => match image.bytes().await {
             Ok(bytes) => bytes,
             Err(why) => {
-                eprintln!("cache::download_image: Couldn't get the bytes of the current page's image: {why:?}");
+                eprintln!("cache::download_page_image: Couldn't get the bytes of the current page's image: {why:?}");
                 process::exit(1);
             }
         },
         Err(why) => {
-            eprintln!("cache::download_image: Couldn't get the current image: {why:?}");
+            eprintln!("cache::download_page_image: Couldn't get the current image: {why:?}");
             process::exit(1);
         }
     };
 
     // println!("{replaced}/{file_name}");
 
-    let wrote = fs::write(format!("{replaced}/images/{file_name}.jpg"), image);
-    if let Err(why) = wrote {
-        eprintln!("cache::download_image: Couldn't save the image to `{replaced}/{file_name}`: {why:?}");
-        process::exit(1);
-    }
+    match fs::write(format!("{replaced}/images/{}.jpg", page.date), image) {
+        Ok(var) => var,
+        Err(why) => {
+            eprintln!(
+                "cache::download_page_image: Couldn't save the image to `{replaced}/images/{}`: {why:?}",
+                page.date
+            );
+            process::exit(1);
+        }
+    };
+
+    match fs::write(
+        format!("{replaced}/{}.json", page.date),
+        match serde_json::to_string(page) {
+            Ok(var) => var,
+            Err(why) => {
+                eprintln!("cache::download_page_image: Couldn't serialize Page struct: {why:?}");
+                process::exit(1)
+            }
+        }
+        .replace("\"cached\":false", "\"cached\":true"), // war crimes
+    ) {
+        Ok(var) => var,
+        Err(why) => {
+            eprintln!("cache::download_page_image: Couldn't save the Page struct to {replaced}/{}.json: {why:?}", page.date);
+            process::exit(1)
+        }
+    };
 }

src/lib.rs

@@ -138,16 +138,44 @@ pub struct Config {
     pub cache_folder: String,
 }
 
-#[derive(Debug)]
+#[derive(Debug, Serialize, Deserialize)]
 pub struct Page {
     pub date: String,
     pub next_page: Option<String>,
     pub prev_page: Option<String>,
     pub image: String,
-    pub cached: bool
+    pub cached: bool,
 }
 
-pub async fn get_page(date: &str) -> Page {
+pub async fn get_page(date: &str, config: &Config) -> Page {
+    if Path::new(&format!(
+        "{}/{date}.json",
+        config.cache_folder.replace('~', &get_home()[..])
+    ))
+    .exists()
+    {
+        match serde_json::from_str(
+            &match fs::read_to_string(
+                &format!(
+                    "{}/{date}.json",
+                    config.cache_folder.replace('~', &get_home()[..])
+                )[..],
+            ) {
+                Ok(var) => var,
+                Err(why) => {
+                    eprintln!("lib::get_page: Couldn't read cache data: {why:?}");
+                    process::exit(1)
+                }
+            }[..],
+        ) {
+            Ok(var) => var,
+            Err(why) => {
+                eprintln!("lib::get_page: Couldn't serialize read cache data: {why:?}");
+                process::exit(1);
+            }
+        }
+    }
+
     let page_html = &match match reqwest::get(format!(
         "https://girlgeniusonline.com/comic.php?date={date}"
     ))
@@ -194,6 +222,10 @@ pub async fn get_page(date: &str) -> Page {
     // check if cache/date.json exists
     // if it does, cached = true
     // if it doesn't, cached = false
+    let mut cached = false;
+    if Path::new(&format!("{}/{date}.json", config.cache_folder)).exists() {
+        cached = true;
+    }
 
     Page {
         date: date.to_string(),

src/main.rs

@@ -18,9 +18,10 @@ async fn main() {
 
     let config = ggg::read_config(&config_file);
     ggg::ensure_exists(&config.cache_folder);
+    ggg::ensure_exists(&format!("{}/images", &config.cache_folder)[..]);
 
-    let current_page = ggg::get_page(&config.latest_date).await;
+    let current_page = ggg::get_page(&config.latest_date, &config).await;
 
     println!("image url: {}\ncache folder: {}", &current_page.image, &config.cache_folder);
-    cache::download_image(&config.cache_folder.replace('~', &ggg::get_home()[..]), current_page.image, current_page.date).await;
+    cache::download_page_image(&config.cache_folder.replace('~', &ggg::get_home()[..]), &current_page).await;
 }