app.rs
| 1 | //! Pages for the Android app: `#device` inside its WebView, `#pair` in the browser. |
| 2 | |
| 3 | use api::{PairBegin, PairCode}; |
| 4 | use leptos::prelude::*; |
| 5 | use leptos::task::spawn_local; |
| 6 | use wasm_bindgen::prelude::*; |
| 7 | |
| 8 | use crate::{http, map}; |
| 9 | |
| 10 | #[wasm_bindgen(inline_js = r#" |
| 11 | export function appToken() { |
| 12 | return window.OtApp ? window.OtApp.token() : null; |
| 13 | } |
| 14 | "#)] |
| 15 | extern "C" { |
| 16 | #[wasm_bindgen(js_name = appToken)] |
| 17 | fn app_token() -> Option<String>; |
| 18 | } |
| 19 | |
| 20 | /// The map of this device only. The app hands over its token through a JavaScript bridge. |
| 21 | #[component] |
| 22 | pub fn DevicePage() -> impl IntoView { |
| 23 | match app_token() { |
| 24 | Some(token) => { |
| 25 | view! { <main class="device"><map::MapPage source=map::Source::Device(token) /></main> } |
| 26 | .into_any() |
| 27 | } |
| 28 | None => view! { <p class="login">"This page is for the opentracker app."</p> }.into_any(), |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | /// A query parameter of `#pair?challenge=…&name=…`. |
| 33 | fn hash_param(key: &str) -> Option<String> { |
| 34 | let hash = window().location().hash().ok()?; |
| 35 | let query = hash.split_once('?')?.1; |
| 36 | query.split('&').find_map(|pair| { |
| 37 | let (k, v) = pair.split_once('=')?; |
| 38 | (k == key) |
| 39 | .then(|| { |
| 40 | js_sys::decode_uri_component(&v.replace('+', " ")) |
| 41 | .ok() |
| 42 | .map(String::from) |
| 43 | }) |
| 44 | .flatten() |
| 45 | }) |
| 46 | } |
| 47 | |
| 48 | /// Confirms a new device for the signed-in user, then hands a one-time code back to the app. |
| 49 | #[component] |
| 50 | pub fn PairPage() -> impl IntoView { |
| 51 | let challenge = hash_param("challenge"); |
| 52 | let name = RwSignal::new(hash_param("name").unwrap_or_else(|| "Android".into())); |
| 53 | let error = RwSignal::new(None::<String>); |
| 54 | let done = RwSignal::new(None::<String>); |
| 55 | let busy = RwSignal::new(false); |
| 56 | let has_challenge = challenge.is_some(); |
| 57 | |
| 58 | let connect = move |ev: leptos::ev::SubmitEvent| { |
| 59 | ev.prevent_default(); |
| 60 | let Some(challenge) = challenge.clone() else { |
| 61 | return; |
| 62 | }; |
| 63 | busy.set(true); |
| 64 | let body = PairBegin { |
| 65 | challenge, |
| 66 | name: name.get_untracked(), |
| 67 | }; |
| 68 | spawn_local(async move { |
| 69 | match http::post::<PairCode>("/api/devices/pair/begin", &body).await { |
| 70 | Ok(c) => { |
| 71 | let url = format!("opentracker://paired?code={}", c.code); |
| 72 | let _ = window().location().assign(&url); |
| 73 | done.set(Some(url)); |
| 74 | } |
| 75 | Err(e) => error.set(Some(e.to_string())), |
| 76 | } |
| 77 | busy.set(false); |
| 78 | }); |
| 79 | }; |
| 80 | |
| 81 | view! { |
| 82 | <form class="login" on:submit=connect> |
| 83 | <h1>"Connect the app"</h1> |
| 84 | {move || match (has_challenge, done.get()) { |
| 85 | (false, _) => view! { <p class="error">"This link is incomplete. Start again in the app."</p> }.into_any(), |
| 86 | // Browsers may block opening the app without a tap, so the link stays as a fallback. |
| 87 | (true, Some(url)) => view! { |
| 88 | <p>"Done. Return to the app to finish."</p> |
| 89 | <a class="button primary" href=url>"Open the app"</a> |
| 90 | } |
| 91 | .into_any(), |
| 92 | (true, None) => view! { |
| 93 | <p>"The opentracker app asks to upload positions to your account as a new device."</p> |
| 94 | <label>"Device name" <input required maxlength="100" bind:value=name /></label> |
| 95 | <button class="primary" disabled=busy>"Connect"</button> |
| 96 | } |
| 97 | .into_any(), |
| 98 | }} |
| 99 | <p class="error">{move || error.get()}</p> |
| 100 | </form> |
| 101 | } |
| 102 | } |
| 103 |