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::i18n::tr; |
| 9 | use crate::{http, map}; |
| 10 | |
| 11 | #[wasm_bindgen(inline_js = r#" |
| 12 | export function appToken() { |
| 13 | return window.OtApp ? window.OtApp.token() : null; |
| 14 | } |
| 15 | "#)] |
| 16 | extern "C" { |
| 17 | #[wasm_bindgen(js_name = appToken)] |
| 18 | fn app_token() -> Option<String>; |
| 19 | } |
| 20 | |
| 21 | /// The map of this device only. The app hands over its token through a JavaScript bridge. |
| 22 | #[component] |
| 23 | pub fn DevicePage() -> impl IntoView { |
| 24 | match app_token() { |
| 25 | Some(token) => { |
| 26 | view! { <main class="device"><map::MapPage source=map::Source::Device(token) /></main> } |
| 27 | .into_any() |
| 28 | } |
| 29 | None => { |
| 30 | view! { <p class="login">{tr("This page is for the opentracker app.")}</p> }.into_any() |
| 31 | } |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | /// A query parameter of `#pair?challenge=…&name=…`. |
| 36 | fn hash_param(key: &str) -> Option<String> { |
| 37 | let hash = window().location().hash().ok()?; |
| 38 | let query = hash.split_once('?')?.1; |
| 39 | web_sys::UrlSearchParams::new_with_str(query).ok()?.get(key) |
| 40 | } |
| 41 | |
| 42 | /// Confirms a new device for the signed-in user, then hands a one-time code back to the app. |
| 43 | #[component] |
| 44 | pub fn PairPage() -> impl IntoView { |
| 45 | let challenge = hash_param("challenge"); |
| 46 | let name = RwSignal::new(hash_param("name").unwrap_or_else(|| "Android".into())); |
| 47 | let error = RwSignal::new(None::<String>); |
| 48 | let done = RwSignal::new(None::<String>); |
| 49 | let busy = RwSignal::new(false); |
| 50 | let has_challenge = challenge.is_some(); |
| 51 | |
| 52 | let connect = move |ev: leptos::ev::SubmitEvent| { |
| 53 | ev.prevent_default(); |
| 54 | let Some(challenge) = challenge.clone() else { |
| 55 | return; |
| 56 | }; |
| 57 | busy.set(true); |
| 58 | let body = PairBegin { |
| 59 | challenge, |
| 60 | name: name.get_untracked(), |
| 61 | }; |
| 62 | spawn_local(async move { |
| 63 | match http::post::<PairCode>("/api/devices/pair/begin", &body).await { |
| 64 | Ok(c) => { |
| 65 | let url = format!("opentracker://paired?code={}", c.code); |
| 66 | let _ = window().location().assign(&url); |
| 67 | done.set(Some(url)); |
| 68 | } |
| 69 | Err(e) => error.set(Some(e.to_string())), |
| 70 | } |
| 71 | busy.set(false); |
| 72 | }); |
| 73 | }; |
| 74 | |
| 75 | view! { |
| 76 | <form class="login" on:submit=connect> |
| 77 | <h1>{tr("Connect the app")}</h1> |
| 78 | {move || match (has_challenge, done.get()) { |
| 79 | (false, _) => view! { <p class="error">{tr("This link is incomplete. Start again in the app.")}</p> }.into_any(), |
| 80 | // Browsers may block opening the app without a tap, so the link stays as a fallback. |
| 81 | (true, Some(url)) => view! { |
| 82 | <p>{tr("Done. Return to the app to finish.")}</p> |
| 83 | <a class="button primary" href=url>{tr("Open the app")}</a> |
| 84 | } |
| 85 | .into_any(), |
| 86 | (true, None) => view! { |
| 87 | <p>{tr("The opentracker app asks to upload positions to your account as a new device.")}</p> |
| 88 | <label>{tr("Device name")} <input required maxlength="100" bind:value=name /></label> |
| 89 | <button class="primary" disabled=busy>{tr("Connect")}</button> |
| 90 | } |
| 91 | .into_any(), |
| 92 | }} |
| 93 | <p class="error">{move || error.get()}</p> |
| 94 | </form> |
| 95 | } |
| 96 | } |
| 97 |