feat(examples): minijinja (#108)

viz-rs · Dec 9, 2023 · 8c501f2 · 8c501f2
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diff --git a/examples/README.md b/examples/README.md
@@ -29,6 +29,7 @@ Here you can find a lot of small crabs 🦀.
   * [markup](templates/markup)
   * [tera](templates/tera)
   * [maud](templates/maud)
+  * [minijinja](templates/minijinja)
 * [Tracing aka logging](tracing)
 
 ## Usage

diff --git a/examples/templates/minijinja/Cargo.toml b/examples/templates/minijinja/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "template-minijinja"
+version = "0.1.0"
+edition.workspace = true
+publish = false
+
+[dependencies]
+viz.workspace = true
+
+serde.workspace = true
+tokio = { workspace = true, features = [ "rt-multi-thread", "macros" ] }
+minijinja = { version = "1", features = ["loader"] }
+once_cell = "1.19"
diff --git a/examples/templates/minijinja/src/main.rs b/examples/templates/minijinja/src/main.rs
@@ -0,0 +1,68 @@
+#![deny(warnings)]
+#![allow(clippy::unused_async)]
+
+use std::{net::SocketAddr, sync::Arc};
+
+use minijinja::{context, path_loader, Environment};
+use once_cell::sync::Lazy;
+use serde::Serialize;
+use tokio::net::TcpListener;
+use viz::{serve, BytesMut, Error, Request, Response, ResponseExt, Result, Router, Tree};
+
+static MINIJINJA: Lazy<Environment> = Lazy::new(|| {
+    let mut env = Environment::new();
+    env.set_loader(path_loader("examples/templates/minijinja/templates"));
+    env
+});
+
+#[derive(Serialize)]
+struct User<'a> {
+    url: &'a str,
+    username: &'a str,
+}
+
+async fn index(_: Request) -> Result<Response> {
+    let mut buf = BytesMut::with_capacity(512);
+    buf.extend(
+        MINIJINJA
+            .get_template("index.html")
+            .map_err(Error::normal)?
+            .render(context! {
+                title => "Viz.rs",
+                users => &vec![
+                    User {
+                        url: "https://github.com/rust-lang",
+                        username: "rust-lang",
+                    },
+                    User {
+                        url: "https://github.com/viz-rs",
+                        username: "viz-rs",
+                    },
+                ],
+            })
+            .map_err(Error::normal)?
+            .as_bytes(),
+    );
+
+    Ok(Response::html(buf.freeze()))
+}
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
+    let listener = TcpListener::bind(addr).await?;
+    println!("listening on http://{addr}");
+
+    let app = Router::new().get("/", index);
+    let tree = Arc::new(Tree::from(app));
+
+    loop {
+        let (stream, addr) = listener.accept().await?;
+        let tree = tree.clone();
+        tokio::task::spawn(async move {
+            if let Err(err) = serve(stream, tree, Some(addr)).await {
+                eprintln!("Error while serving HTTP connection: {err}");
+            }
+        });
+    }
+}
diff --git a/examples/templates/minijinja/templates/index.html b/examples/templates/minijinja/templates/index.html
@@ -0,0 +1,9 @@
+{% extends "layout.html" %}
+{% block title %} Viz & MiniJinja {% endblock title %}
+{% block body %}
+<ul>
+{% for user in users %}
+  <li><a href="{{ user.url | safe }}">{{ user.username }}</a></li>
+{% endfor %}
+</ul>
+{% endblock %}
diff --git a/examples/templates/minijinja/templates/layout.html b/examples/templates/minijinja/templates/layout.html
@@ -0,0 +1,10 @@
+<html>
+  <head>
+    <title>
+      {% block title %}{% endblock %}
+    </title>
+  </head>
+  <body>
+    {% block body %}{% endblock %}
+  </body>
+</html>