Polish and publish sigweb

README.md

@@ -4,6 +4,8 @@ Consisting of a Rust library for generating song ideas `libsig`,
 a command line tool for calling `libsig`,
 and a web interface with a JSON API for getting structured results from `libsig`.
 
+![an example of sigweb in use](sigweb.png)
+
 ## Usage
 
 The primary type of `libsig` is the `SongIdea`. You can generate human-readable representations with `Display` (so, `println!("{}", my_song_idea)`).
@@ -20,3 +22,7 @@ surfy lead, blownout pad, light vocals, acidic snare, sonorous hat, and digital
 ```
 
 It also takes a parameter `--ambient` to avoid suggesting percussion parts.
+
+`sigweb` is a very basic Rocket app. I suggest building it with `x86_64-unknown-linux-musl`. Once built take the `sigweb` binary and put it in a folder with an appropriate `Rocket.toml`. You can set a base URL with the environment variable `SIGWEB_BASE_URL`. See the provided `sigweb.service` for a sample SystemD unit.
+
+It provides a JSON API with the endpoints `/api/v1/{generate, generate_ambient}`.

sigweb/sigweb.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Song Idea Generator Web Service
+
+[Service]
+Type=simple
+User=nora
+WorkingDirectory=/home/nora/sigweb
+ExecStart=/home/nora/sigweb/sigweb
+Environment=SIGWEB_BASE_URL="https://nora.codes/sigweb/"
+
+[Install]
+WantedBy=multi-user.target

sigweb/src/main.rs

@@ -1,13 +1,17 @@
 #[macro_use]
 extern crate rocket;
 use libsig;
-use rocket::fs::NamedFile;
 use rocket::response::content::{Css, Html};
 use rocket::serde::json::Json;
+use rocket::State;
 use serde::{Deserialize, Serialize};
 use serde_json::{json, Value};
 mod templates;
 
+struct BaseUrl {
+    url: String,
+}
+
 #[get("/api")]
 fn api_version_available() -> Json<Value> {
     Json(json! ({
@@ -47,42 +51,46 @@ fn api_v1_generate_ambient() -> Json<Output> {
 }
 
 #[get("/")]
-fn index() -> Html<String> {
-    Html(templates::main_page_template(None))
+fn index(base: &State<BaseUrl>) -> Html<String> {
+    Html(templates::main_page_template(None, &base.url))
 }
 
 #[get("/generate")]
-fn generate() -> Html<String> {
+fn generate(base: &State<BaseUrl>) -> Html<String> {
     Html(templates::main_page_template(Some(
         libsig::SongIdea::generate(),
-    )))
+    ), &base.url))
 }
 
 #[get("/generate_ambient")]
-fn generate_ambient() -> Html<String> {
+fn generate_ambient(base: &State<BaseUrl>) -> Html<String> {
     Html(templates::main_page_template(Some(
         libsig::SongIdea::generate_ambient(),
-    )))
+    ), &base.url))
 }
 
 #[get("/style.css")]
-async fn style_css() -> Css<Option<NamedFile>> {
-    Css(NamedFile::open("static/style.css").await.ok())
+async fn style_css() -> Css<String> {
+    Css(include_str!("../static/style.css").into())
 }
 
 #[launch]
 fn rocket() -> _ {
-    rocket::build().mount(
-        "/",
-        routes![
-            api_version_available,
-            api_v1_index,
-            api_v1_generate,
-            api_v1_generate_ambient,
-            generate,
-            generate_ambient,
-            index,
-            style_css,
-        ],
-    )
+    rocket::build()
+        .manage(BaseUrl {
+            url: std::env::var("SIGWEB_BASE_URL").unwrap_or("/".to_string()),
+        })
+        .mount(
+            "/",
+            routes![
+                api_version_available,
+                api_v1_index,
+                api_v1_generate,
+                api_v1_generate_ambient,
+                generate,
+                generate_ambient,
+                index,
+                style_css,
+            ],
+        )
 }

sigweb/src/templates.rs

@@ -1,22 +1,22 @@
 use maud::{html, DOCTYPE};
 use libsig::SongIdea;
 
-pub fn main_page_template(idea: Option<SongIdea>) -> String {
-    let content = match idea {
-        Some(idea) => { idea.to_string() },
-        None => { "Generate a new idea with the links below!".to_string() }
-    };
+pub fn main_page_template(idea: Option<SongIdea>, base_url: &str) -> String {
     let html = html! {
         (DOCTYPE)
         head {
             link rel="stylesheet" href="style.css";
+            base href=(base_url);
         }
         body {
             h1 { "Song Idea Generator" } 
-            p{ "Why don't you make a song like this: " }
-            p.content {
-                (content)
-            }
+            (match idea {
+                Some(idea) => html!{ 
+                    p { "Why don't you make a song like this: " }
+                    p.content { (idea) }
+                },
+                None => html! { p { "Generate a new idea with the links below!" } p.content {} }
+            })
             footer {
                 p {
                     a href="./generate" { "generate new" }