initial impl

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -1,2 +1,3 @@
+/.direnv
 /target
 result*

Cargo.toml

@@ -1,8 +1,13 @@
 [package]
-name = "quick-start-simple"
+name = "limbusart"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
+axum = {git = "https://github.com/tokio-rs/axum.git", version = "0.6"}
+tokio = {version = "1", features = ["rt-multi-thread", "macros"]}
+http = "0.2"
+fastrand = {version = "2", features = ["std"]}
+reqwest = {version = "0.11", default-features = false, features = ["rustls-tls-native-roots"]}
+dashmap = "5"
+maud = "0.25"

arts.txt

@@ -0,0 +1,3 @@
+https://twitter.com/FFJ_OFF/status/1679888209705340928
+https://twitter.com/rauchoi_ovu/status/1680486681663922177
+https://twitter.com/lk0_71604/status/1680425494741938179

flake.lock

@@ -0,0 +1,159 @@
+{
+  "nodes": {
+    "crane": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-overlay": "rust-overlay"
+      },
+      "locked": {
+        "lastModified": 1688772518,
+        "narHash": "sha256-ol7gZxwvgLnxNSZwFTDJJ49xVY5teaSvF7lzlo3YQfM=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "8b08e96c9af8c6e3a2b69af5a7fa168750fcf88e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ipetkov",
+        "repo": "crane",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1673956053,
+        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1687709756,
+        "narHash": "sha256-Y5wKlQSkgEK2weWdOu4J3riRd+kV/VCgHsqLNTTWQ/0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "dbabf0ca0c0c4bce6ea5eaf65af5cb694d2082c7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1689068808,
+        "narHash": "sha256-6ixXo3wt24N/melDWjq70UuHQLxGV8jZvooRanIHXw0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "919d646de7be200f3bf08cb76ae1f09402b6f9b4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1689449371,
+        "narHash": "sha256-sK3Oi8uEFrFPL83wKPV6w0+96NrmwqIpw9YFffMifVg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "29bcead8405cfe4c00085843eb372cc43837bb9d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "crane": "crane",
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "flake-utils": [
+          "crane",
+          "flake-utils"
+        ],
+        "nixpkgs": [
+          "crane",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1688351637,
+        "narHash": "sha256-CLTufJ29VxNOIZ8UTg0lepsn3X03AmopmaLTTeHDCL4=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "f9b92316727af9e6c7fee4a761242f7f46880329",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -46,15 +46,16 @@
         };
 
         devShells.default = pkgs.mkShell {
+          name = "limbusart-shell";
+          
           inputsFrom = builtins.attrValues self.checks.${system};
 
-          # Additional dev-shell environment variables can be set directly
-          # MY_CUSTOM_DEVELOPMENT_VAR = "something else";
-
           # Extra inputs can be added here
-          nativeBuildInputs = with pkgs; [
+          packages = with pkgs; [
             cargo
             rustc
+            rust-analyzer
+            rustfmt
           ];
         };
       });

src/error.rs

@@ -0,0 +1,47 @@
+use std::fmt::Display;
+
+use axum::response::IntoResponse;
+use http::StatusCode;
+
+type BoxedError = Box<dyn std::error::Error>;
+
+#[derive(Debug)]
+pub(crate) struct AppError {
+    internal: BoxedError,
+    status: Option<StatusCode>,
+}
+
+impl AppError {
+    pub(crate) fn status(mut self, code: StatusCode) -> Self {
+        self.status = Some(code);
+        self
+    }
+}
+
+impl<E> From<E> for AppError
+where
+    E: Into<BoxedError>,
+{
+    fn from(err: E) -> Self {
+        Self {
+            internal: err.into(),
+            status: None,
+        }
+    }
+}
+
+impl IntoResponse for AppError {
+    fn into_response(self) -> axum::response::Response {
+        (
+            self.status.unwrap_or(StatusCode::INTERNAL_SERVER_ERROR),
+            format!("Something went wrong: {}", self.internal),
+        )
+            .into_response()
+    }
+}
+
+impl Display for AppError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.internal.fmt(f)
+    }
+}

src/main.rs

@@ -1,3 +1,170 @@
-fn main() {
+use axum::{extract::State, response::Html, routing::get, Router};
-    println!("Hello, world!");
+use dashmap::DashMap;
+use error::AppError;
+use http::Uri;
+use std::{ops::Deref, str::FromStr, sync::Arc};
+
+mod error;
+
+type AppResult<T> = Result<T, AppError>;
+
+enum ArtKind {
+    Twitter,
+}
+
+impl FromStr for ArtKind {
+    type Err = AppError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "twitter.com" => Ok(Self::Twitter),
+            _ => Err("not support website".into()),
+        }
+    }
+}
+
+struct Art {
+    url: Uri,
+    kind: ArtKind,
+}
+
+impl FromStr for Art {
+    type Err = AppError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let url: Uri = s.parse()?;
+        let kind: ArtKind = url.authority().unwrap().host().parse()?;
+
+        Ok(Self { url, kind })
+    }
+}
+
+struct Data {
+    // actual arts
+    art: Vec<Art>,
+}
+
+impl Data {
+    fn parse(data: &str) -> AppResult<Self> {
+        let mut this = Self {
+            art: Default::default(),
+        };
+
+        for entry in data.lines() {
+            let art: Art = entry.parse()?;
+            this.art.push(art);
+        }
+
+        Ok(this)
+    }
+
+    fn pick_random_art(&self) -> &Art {
+        let no = fastrand::usize(0..self.art.len());
+        &self.art[no]
+    }
+}
+
+struct InternalAppState {
+    // cached direct links to images
+    direct_links: DashMap<Uri, String>,
+    data: Data,
+    http: reqwest::Client,
+}
+
+#[derive(Clone)]
+struct AppState {
+    internal: Arc<InternalAppState>,
+}
+
+impl AppState {
+    fn new(data: Data) -> Self {
+        Self {
+            internal: Arc::new(InternalAppState {
+                data,
+                direct_links: Default::default(),
+                http: reqwest::ClientBuilder::new()
+                    .redirect(reqwest::redirect::Policy::none())
+                    .build()
+                    .unwrap(),
+            }),
+        }
+    }
+}
+
+impl Deref for AppState {
+    type Target = InternalAppState;
+
+    fn deref(&self) -> &Self::Target {
+        &self.internal
+    }
+}
+
+#[tokio::main]
+async fn main() {
+    let arts = std::fs::read_to_string("arts.txt").unwrap();
+    let data = AppState::new(Data::parse(&arts).unwrap());
+    let app = Router::new().route("/", get(show_art)).with_state(data);
+
+    let listener = tokio::net::TcpListener::bind("127.0.0.1:3000")
+        .await
+        .unwrap();
+    println!("listening on {}", listener.local_addr().unwrap());
+    axum::serve(listener, app).await.unwrap();
+}
+
+async fn show_art(state: State<AppState>) -> AppResult<Html<String>> {
+    let art = state.data.pick_random_art();
+    if let Some(image_link) = state.direct_links.get(&art.url) {
+        Ok(render_page(art, &image_link))
+    } else {
+        let image_link = match art.kind {
+            ArtKind::Twitter => fetch_twitter_image_link(&state.http, &art.url).await?,
+        };
+        let page = render_page(art, &image_link);
+        state.direct_links.insert(art.url.clone(), image_link);
+        Ok(page)
+    }
+}
+
+fn render_page(art: &Art, image_link: &str) -> Html<String> {
+    let body_style =
+        "margin: 0px; background: #0e0e0e; height: 100vh; width: 100vw; display: flex;";
+    let img_style = "display: block; margin: auto; max-height: 100vh; max-width: 100vw;";
+    let about_style = "position: absolute; bottom: 0; font-size: 0.75em; color: #ffffff; background-color: #0e0e0eaa;";
+    let content = maud::html! {
+        (maud::DOCTYPE)
+        head {
+            meta charset="utf8";
+            meta property="og:image" content=(image_link);
+            title { "random limbussy art" }
+        }
+        body style=(body_style) {
+            img style=(img_style) src=(image_link);
+            a style=(format!("{about_style} left: 0;")) href=(art.url) target="_blank" {
+                "source: " (art.url)
+            }
+            a style=(format!("{about_style} right: 0;")) href="https://gaze.systems" target="_blank" {
+                "website made by dusk"
+            }
+        }
+    };
+    Html(content.into_string())
+}
+
+async fn fetch_twitter_image_link(http: &reqwest::Client, url: &Uri) -> AppResult<String> {
+    let fxurl = Uri::builder()
+        .scheme("https")
+        .authority("d.fxtwitter.com")
+        .path_and_query(url.path_and_query().unwrap().clone())
+        .build()?
+        .to_string();
+    let req = http.get(fxurl).build()?;
+    let resp = http.execute(req).await?.error_for_status()?;
+    let link = resp
+        .headers()
+        .get(http::header::LOCATION)
+        .unwrap()
+        .to_str()?
+        .to_owned();
+    Ok(link)
 }