From c334c36645b7242aa43a2624c88e0ffc17651e59 Mon Sep 17 00:00:00 2001 From: "G.J.R. Timmer" Date: Thu, 29 Oct 2026 07:02:46 -0400 Subject: [PATCH] feat(web): startup option in effectcraft-config.json A startup key (last, empty or demo) chooses the project the page opens on load. empty restores the last visit's project and otherwise starts blank, never with the demo; demo always opens the demo project; last, or no key, is the current behaviour. ?empty and ?demo still win. The config file is fetched once per page load and the service worker never caches it. --- apps/effectcraft-web/Cargo.toml | 4 ++ apps/effectcraft-web/src/app.rs | 13 +++-- apps/effectcraft-web/src/config_file.rs | 44 +++++++++++++++++ apps/effectcraft-web/src/lib.rs | 5 +- apps/effectcraft-web/src/startup.rs | 49 +++++++++++++++++++ apps/effectcraft-web/tests/it/main.rs | 1 + .../effectcraft-web/tests/it/startup_tests.rs | 40 +++++++++++++++ apps/effectcraft-web/web/sw.js | 4 +- docs/web.md | 19 +++++++ packaging/web/README.md | 13 +++++ packaging/web/_headers | 3 ++ 11 files changed, 188 insertions(+), 7 deletions(-) create mode 100644 apps/effectcraft-web/src/config_file.rs create mode 100644 apps/effectcraft-web/src/startup.rs create mode 100644 apps/effectcraft-web/tests/it/main.rs create mode 100644 apps/effectcraft-web/tests/it/startup_tests.rs diff --git a/apps/effectcraft-web/Cargo.toml b/apps/effectcraft-web/Cargo.toml index 28ea2f369..e7bb3c347 100644 --- a/apps/effectcraft-web/Cargo.toml +++ b/apps/effectcraft-web/Cargo.toml @@ -51,6 +51,10 @@ web-sys = { version = "0.3", features = [ "HtmlInputElement", "Location", "Navigator", + "Request", + "RequestCache", + "RequestInit", + "Response", "Url", "UrlSearchParams", "Window", diff --git a/apps/effectcraft-web/src/app.rs b/apps/effectcraft-web/src/app.rs index 169529e5d..be7063f9f 100644 --- a/apps/effectcraft-web/src/app.rs +++ b/apps/effectcraft-web/src/app.rs @@ -6,7 +6,7 @@ use std::sync::atomic::{AtomicBool, Ordering}; use effectcraft_engine::Session; -use crate::{api, audio, browse, diskcache, files, frames, persist, storage, worker}; +use crate::{api, audio, browse, config_file, diskcache, files, frames, persist, storage, worker}; use effectcraft_ui_egui::EffectcraftApp; use serde_json::json; use wasm_bindgen::prelude::*; @@ -220,6 +220,8 @@ pub async fn start(canvas_id: String) -> Result<(), JsValue> { }; api::set_info("storage", json!({"backend": persist::backend(), "entries": stored, "loadMs": t0.elapsed().as_secs_f64() * 1000.0})); audio::install_unlock(); + // `./effectcraft-config.json`: what to open on load. + let startup = config_file::startup().await; browse::restore(); diskcache::init(); storage::refresh(); @@ -255,10 +257,11 @@ pub async fn start(canvas_id: String) -> Result<(), JsValue> { let mut session = session(); session.load_settings(); let recovery = session.begin_recovery(); - // `?empty`: a blank project; `?demo`: the demo project; otherwise the last visit's - // project (the demo on a first visit). - let restored = !empty && !query_flag("demo") && persist::restore(&mut session); - if !restored && !empty { + // `?empty`: a blank project; `?demo`: the demo project; otherwise what the config's + // `startup` says (default: the last visit's project, the demo on a first visit). + let demo = query_flag("demo"); + let restored = !empty && !demo && startup.restores() && persist::restore(&mut session); + if !restored && !empty && (demo || startup.demo_when_nothing_restored()) { let _ = session.execute("file.openDemoProject", json!({})); } api::set_info("restored", json!(restored)); diff --git a/apps/effectcraft-web/src/config_file.rs b/apps/effectcraft-web/src/config_file.rs new file mode 100644 index 000000000..baeca3269 --- /dev/null +++ b/apps/effectcraft-web/src/config_file.rs @@ -0,0 +1,44 @@ +//! `./effectcraft-config.json`, fetched once per page load and shared by whoever reads a key. + +use std::cell::RefCell; + +use wasm_bindgen::JsCast; +use wasm_bindgen_futures::JsFuture; + +use crate::startup::{self, Startup}; + +thread_local! { + /// `None`: not fetched yet; `Some(None)`: no usable file. + static FILE: RefCell>>> = const { RefCell::new(None) }; +} + +async fn fetch() -> Option> { + let init = web_sys::RequestInit::new(); + // Always ask the server: the file is the operator's switch, never a cached copy. + init.set_cache(web_sys::RequestCache::NoCache); + let req = web_sys::Request::new_with_str_and_init("effectcraft-config.json", &init).ok()?; + let resp: web_sys::Response = JsFuture::from(web_sys::window()?.fetch_with_request(&req)).await.ok()?.dyn_into().ok()?; + if resp.status() != 200 { + return None; + } + let buf = JsFuture::from(resp.array_buffer().ok()?).await.ok()?; + let a = js_sys::Uint8Array::new(&buf); + (a.length() as usize <= startup::CONFIG_MAX).then(|| a.to_vec()) +} + +/// The config file's bytes (`None` when there is none), fetched on the first call. +pub async fn bytes() -> Option> { + if let Some(done) = FILE.with(|f| f.borrow().clone()) { + return done; + } + let got = fetch().await; + FILE.with(|f| *f.borrow_mut() = Some(got.clone())); + got +} + +/// The configured startup behaviour. +pub async fn startup() -> Startup { + let s = bytes().await.map(|b| startup::parse(&b)).unwrap_or_default(); + log::info!("startup: {s:?}"); + s +} diff --git a/apps/effectcraft-web/src/lib.rs b/apps/effectcraft-web/src/lib.rs index 97d2e887f..e1bf85894 100644 --- a/apps/effectcraft-web/src/lib.rs +++ b/apps/effectcraft-web/src/lib.rs @@ -18,10 +18,11 @@ //! | cpal audio output | Web Audio: an AudioWorklet fed from the preview mixdown (`audio`) | //! | TCP control channel / MCP | `window.effectcraft` JavaScript API (`api`) | //! -//! [`store`] is portable (unit-tested natively); everything else is `wasm32`-only. +//! [`store`] and [`startup`] are portable (unit-tested natively); everything else is `wasm32`-only. #![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::unimplemented, clippy::todo, clippy::unreachable)] +pub mod startup; pub mod store; #[cfg(target_arch = "wasm32")] @@ -33,6 +34,8 @@ pub mod audio; #[cfg(target_arch = "wasm32")] pub mod browse; #[cfg(target_arch = "wasm32")] +pub mod config_file; +#[cfg(target_arch = "wasm32")] pub mod diskcache; #[cfg(target_arch = "wasm32")] pub mod files; diff --git a/apps/effectcraft-web/src/startup.rs b/apps/effectcraft-web/src/startup.rs new file mode 100644 index 000000000..9d30cb609 --- /dev/null +++ b/apps/effectcraft-web/src/startup.rs @@ -0,0 +1,49 @@ +//! The `startup` key of `./effectcraft-config.json`: which project the page opens on load. +//! +//! | Value | On load | +//! |---|---| +//! | `"last"` (and absent) | the last visit's project; the demo project on a first visit | +//! | `"empty"` | the last visit's project; a blank project on a first visit, never the demo | +//! | `"demo"` | the demo project, whatever the last visit left | +//! +//! The `?empty` and `?demo` URL flags still win. Anything else (a missing key, another type, an +//! unknown value, a config that is not JSON) is the default, `"last"`. + +use serde_json::Value; + +/// What the page opens on load. +#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)] +pub enum Startup { + #[default] + Last, + Empty, + Demo, +} + +/// The largest config file read (bytes). +pub const CONFIG_MAX: usize = 64 * 1024; + +/// The `startup` key of a config file's bytes. +pub fn parse(bytes: &[u8]) -> Startup { + if bytes.len() > CONFIG_MAX { + return Startup::default(); + } + let Ok(v) = serde_json::from_slice::(bytes) else { return Startup::default() }; + match v.get("startup").and_then(Value::as_str) { + Some("empty") => Startup::Empty, + Some("demo") => Startup::Demo, + _ => Startup::Last, + } +} + +impl Startup { + /// Whether the last visit's project is restored (off for the demo). + pub fn restores(self) -> bool { + self != Startup::Demo + } + + /// Whether the demo project opens when nothing was restored (off for a blank start). + pub fn demo_when_nothing_restored(self) -> bool { + self != Startup::Empty + } +} diff --git a/apps/effectcraft-web/tests/it/main.rs b/apps/effectcraft-web/tests/it/main.rs new file mode 100644 index 000000000..a4d242ba5 --- /dev/null +++ b/apps/effectcraft-web/tests/it/main.rs @@ -0,0 +1 @@ +mod startup_tests; diff --git a/apps/effectcraft-web/tests/it/startup_tests.rs b/apps/effectcraft-web/tests/it/startup_tests.rs new file mode 100644 index 000000000..f5a491368 --- /dev/null +++ b/apps/effectcraft-web/tests/it/startup_tests.rs @@ -0,0 +1,40 @@ +//! The `startup` key of the config file. + +use effectcraft_web::startup::{CONFIG_MAX, Startup, parse}; + +#[test] +fn the_three_values() { + assert_eq!(parse(br#"{"startup":"empty"}"#), Startup::Empty); + assert_eq!(parse(br#"{"startup":"demo"}"#), Startup::Demo); + assert_eq!(parse(br#"{"startup":"last"}"#), Startup::Last); +} + +#[test] +fn absent_or_invalid_is_the_default() { + for bytes in + [&b"{}"[..], b"", b"not json", b"[]", b"null", br#"{"startup":1}"#, br#"{"startup":"Empty"}"#, br#"{"startup":null}"#, br#"{"startup":["empty"]}"#] + { + assert_eq!(parse(bytes), Startup::Last, "{:?}", String::from_utf8_lossy(bytes)); + } +} + +#[test] +fn a_config_with_other_keys_still_has_its_startup() { + assert_eq!(parse(br#"{"remote":{"mounts":[]},"startup":"empty"}"#), Startup::Empty); + assert_eq!(parse(br#"{"startup":"demo","unknown":{"a":1}}"#), Startup::Demo); +} + +#[test] +fn an_oversized_file_is_the_default() { + let mut big = br#"{"startup":"empty","pad":""#.to_vec(); + big.extend(std::iter::repeat_n(b'x', CONFIG_MAX)); + big.extend_from_slice(br#""}"#); + assert_eq!(parse(&big), Startup::Last); +} + +#[test] +fn what_each_value_does_on_load() { + assert!(Startup::Last.restores() && Startup::Last.demo_when_nothing_restored()); + assert!(Startup::Empty.restores() && !Startup::Empty.demo_when_nothing_restored()); + assert!(!Startup::Demo.restores() && Startup::Demo.demo_when_nothing_restored()); +} diff --git a/apps/effectcraft-web/web/sw.js b/apps/effectcraft-web/web/sw.js index 4acbeeeeb..8f48a93bc 100644 --- a/apps/effectcraft-web/web/sw.js +++ b/apps/effectcraft-web/web/sw.js @@ -3,7 +3,8 @@ // `cargo xtask web` fills in the build's file list and version. Every file is precached into a // cache named after the version, served cache-first (responses keep the server's headers, so // the page stays cross-origin isolated: COOP/COEP), and old versions are dropped once the new -// one activates. Anything else same-origin is fetched from the network and cached for next time. +// one activates. Anything else same-origin is fetched from the network and cached for next time, +// except the config file, which must stay live. const VERSION = "__EC_VERSION__"; const FILES = __EC_FILES__; const CACHE = `effectcraft-${VERSION}`; @@ -30,6 +31,7 @@ self.addEventListener("fetch", (event) => { const req = event.request; const url = new URL(req.url); if (req.method !== "GET" || url.origin !== self.location.origin) return; + if (url.pathname.endsWith("/effectcraft-config.json")) return; event.respondWith( (async () => { const cache = await caches.open(CACHE).catch(() => null); diff --git a/docs/web.md b/docs/web.md index c18f7e869..3f9374caa 100644 --- a/docs/web.md +++ b/docs/web.md @@ -242,6 +242,25 @@ Window ▸ Media Browser browses a virtual tree (`src/browse.rs`): `mediaBrowser.list` reports the places and these actions; `mediaBrowser.action {action}` runs one. +### Startup project + +By default the page opens the last visit's project, and the demo project on a first visit. A +`startup` key in `effectcraft-config.json` (next to `index.html`) changes that: + +```json +{"startup":"empty"} +``` + +| Value | On load | +|---|---| +| `"last"` (or no key) | the last visit's project; the demo project on a first visit | +| `"empty"` | the last visit's project; a blank project on a first visit, never the demo | +| `"demo"` | the demo project, whatever the last visit left | + +The `?empty` and `?demo` URL flags still win. A missing, invalid or non-JSON file, or an unknown +value, is the default. The file is fetched once per page load; serve it with +`Cache-Control: no-cache` (the service worker never caches it). + ### Audio Audio preview goes through **Web Audio**: an AudioWorklet (`audio-worklet.js`; a diff --git a/packaging/web/README.md b/packaging/web/README.md index 0a1f56fe8..6642b2b30 100644 --- a/packaging/web/README.md +++ b/packaging/web/README.md @@ -58,6 +58,19 @@ location /effectcraft/ { Local test: `python3 -m http.server 8765` inside the folder, then open http://localhost:8765/. +## Startup project (optional) + +To choose what the page opens on load, add an `effectcraft-config.json` next to `index.html`: + +```json +{"startup":"empty"} +``` + +`"empty"` restores the last visit's project and otherwise starts blank (never the demo); `"demo"` +always opens the demo project; `"last"` (the default) restores the last visit's project and shows +the demo on a first visit. Serve the file with `Cache-Control: no-cache`. Details: +[docs/web.md](../../docs/web.md#startup-project). + ## Embedding in a page (iframe) ```html diff --git a/packaging/web/_headers b/packaging/web/_headers index 013e1cf8a..e59592fb1 100644 --- a/packaging/web/_headers +++ b/packaging/web/_headers @@ -12,3 +12,6 @@ /index.html Cache-Control: no-cache + +/effectcraft-config.json + Cache-Control: no-cache