feat: init

.envrc

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+use flake

.gitignore

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+# Created by https://www.toptal.com/developers/gitignore/api/direnv
+# Edit at https://www.toptal.com/developers/gitignore?templates=direnv
+
+### direnv ###
+.direnv
+.envrc
+
+# End of https://www.toptal.com/developers/gitignore/api/direnv
+# Created by https://www.toptal.com/developers/gitignore/api/rust
+# Edit at https://www.toptal.com/developers/gitignore?templates=rust
+
+### Rust ###
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# End of https://www.toptal.com/developers/gitignore/api/rust

Cargo.toml

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+[package]
+name = "counter-rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+actix-web = { version = "4.4.1" }
+askama = { version = "0.12.1", features = ["with-actix-web"] }
+askama_actix = "0.14.0"
+env_logger = "0.11.0"
+rustls = "0.22.2"

flake.lock

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+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1705309234,
+        "narHash": "sha256-uNRRNRKmJyCRC/8y1RqBkqWBLM034y4qN7EprSdmgyA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "1ef2e671c3b0c19053962c07dbda38332dcebf26",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "naersk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1698420672,
+        "narHash": "sha256-/TdeHMPRjjdJub7p7+w55vyABrsJlt5QkznPYy55vKA=",
+        "owner": "nix-community",
+        "repo": "naersk",
+        "rev": "aeb58d5e8faead8980a807c840232697982d47b9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1704161960,
+        "narHash": "sha256-QGua89Pmq+FBAro8NriTuoO/wNaUtugt29/qqA8zeeM=",
+        "path": "/nix/store/7b7m3p9gc9da6cd7wgyabs3wg1832j0v-source",
+        "rev": "63143ac2c9186be6d9da6035fa22620018c85932",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1705666311,
+        "narHash": "sha256-VYdSQm7zq3AStyHhRr3SBCTA8fVzrl6WtIlXTs2Wlts=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a455c5fb3ee513e2f443838a0e84d52b035adb67",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs_2"
+      }
+    },
+    "systems": {
+      "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

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+{
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    naersk.url = "github:nix-community/naersk";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = { self, flake-utils, naersk, nixpkgs }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = (import nixpkgs) {
+          inherit system;
+        };
+
+        naersk' = pkgs.callPackage naersk { };
+
+      in
+      rec {
+        # For `nix build` & `nix run`:
+        defaultPackage = naersk'.buildPackage {
+          src = ./.;
+        };
+
+        # For `nix develop`:
+        devShell = pkgs.mkShell {
+          nativeBuildInputs = with pkgs; [ rustc cargo rust-analyzer clippy entr ];
+        };
+      }
+    );
+}

src/main.rs

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+use std::sync::Mutex;
+
+use actix_web::{App, HttpServer};
+use actix_web::web;
+use askama::Template;
+
+#[derive(Debug)]
+struct AppState {
+    counter: Mutex<i32>
+}
+
+#[derive(Template)]
+#[template(path = "counter.html")]
+struct CounterTemplate {
+    counter: i32,
+}
+
+#[derive(Template)]
+#[template(path = "index.html", escape = "txt")]
+struct IndexTemplate {
+    counter: CounterTemplate,
+}
+
+#[actix_web::get("/")]
+async fn index(data: web::Data<AppState>) -> impl actix_web::Responder {
+    let counter = data.counter.lock().unwrap();
+    let counter_template = CounterTemplate { counter: *counter };
+    IndexTemplate { counter: counter_template }
+}
+
+#[actix_web::post("/api/increment")]
+async fn increment(data: web::Data<AppState>) -> impl actix_web::Responder {
+    let mut counter = data.counter.lock().unwrap();
+    *counter += 1;
+    CounterTemplate { counter: *counter }
+}
+
+#[actix_web::post("/api/decrement")]
+async fn decrement(data: web::Data<AppState>) -> impl actix_web::Responder {
+    let mut counter = data.counter.lock().unwrap();
+    *counter -= 1;
+    CounterTemplate { counter: *counter }
+}
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    std::env::set_var("RUST_LOG", "debug");
+    env_logger::init();
+    println!("Starting webserver on port 8080");
+    let app_state = web::Data::new( AppState {
+        counter: Mutex::new(0)
+    });
+    HttpServer::new(move|| {
+        App::new()
+            .app_data(app_state.clone())
+            .service(index)
+            .service(increment)
+            .service(decrement)
+    })
+    .bind(("127.0.0.1", 8080))?
+    .run()
+    .await
+}

templates/counter.html

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+<h1 id="counter" class="text-6xl font-bold text-gray-800 dark:text-gray-200">
+  {{ counter }}
+</h1>

templates/index.html

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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title></title>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <script src="https://cdn.tailwindcss.com"></script>
+    <script src="https://unpkg.com/htmx.org@1.9.10" integrity="sha384-D1Kt99CQMDuVetoL1lrYwg5t+9QdHe7NLX/SoJYkXDFfX37iInKRy5xLSi8nO7UC" crossorigin="anonymous"></script>
+  </head>
+  <body>
+    <div class="flex flex-col items-center justify-center h-screen bg-gray-100 dark:bg-gray-900">
+      <div class="text-center">
+        {{ counter }}
+        <p class="text-xl text-gray-600 dark:text-gray-400">
+          Click the buttons to increase or decrease the counter
+        </p>
+      </div>
+      <div class="mt-8 flex gap-4">
+        <button hx-post="/api/increment" hx-target="#counter" class="px-4 py-2 bg-blue-500 text-white rounded hover:bg-blue-600 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-opacity-50">
+          Increment
+        </button>
+        <button hx-post="/api/decrement" hx-target="#counter" class="px-4 py-2 bg-red-500 text-white rounded hover:bg-red-600 focus:outline-none focus:ring-2 focus:ring-red-500 focus:ring-opacity-50">
+          Decrement
+        </button>
+      </div>
+    </div>
+  </body>
+</html>
+