iOS: presses are felt (#430)

The page asks the app for a haptic ({t:"haptic", kind}) and the app
plays the phone's own. A light tap for play, pause, flag and pull to
refresh; the system's success for marking read, one item or all; its
warning with an error toast. A browser has no host to ask, and an
older app ignores the message, so there is nothing to gate.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ios/CHANGELOG.md

@@ -11,3 +11,4 @@ The iOS app, `ios/`. Format: [Keep a Changelog](https://keepachangelog.com/en/1.
 - The icon shows All Subscriptions' unread count, as the page's badge does: set when the app comes forward, after an item is marked read, and by a refresh iOS runs now and then while the app is closed, so it can be hours behind (#421).
 - Episodes kept on the phone, with the page's Keep button, play with no connection: the app fetches the file in the background, even with the app closed, and plays it from the phone; where you got to and what you finished offline is sent once the connection is back. Signing out removes them (#425).
 - A sleep timer in the player, kept by the phone, so it pauses on time with the screen locked, fading out over the last ten seconds; and an AirPlay button beside it, for another speaker or a TV (#429).
+- Presses are felt: a light tap on play, pause, flag and pull to refresh, a success on marking read, a warning with an error (#430).

ios/README.md

@@ -72,6 +72,7 @@ Page to app, on `webkit.messageHandlers.ipx`:
 | `{t:"keep", url}` `{t:"unkeep", url}` | keep a file on the phone, or let it go: the page's path for it, `/media/42` or `/media/42/deadair` (#425) |
 | `{t:"clearKept"}` | signing out: everything kept goes |
 | `{t:"sleep", secs}` | pause after `secs`, fading out over the last ten; 0 turns the timer off (#429) |
+| `{t:"haptic", kind}` | a press felt: `tap`, `done` (marked read) or `warn` (an error) (#430) |
 | `{t:"route", x, y, w, h}` | open the AirPlay picker, pointing at the page's button, in the web view's points (#429) |
 
 App to page, as `window.ipxNative.on(...)`:

ios/Sources/Bridge.swift

@@ -14,6 +14,8 @@ final class Bridge: NSObject, WKScriptMessageHandler {
 
     private weak var webView: WKWebView?
     private let playback: Playback
+    private let impact = UIImpactFeedbackGenerator(style: .light)
+    private let notice = UINotificationFeedbackGenerator()
     /// The system's AirPlay picker, which has no API to open it but its own button: kept on the
     /// web view, invisible, and pressed when the page's button is.
     private lazy var routePicker: AVRoutePickerView = {
@@ -91,6 +93,7 @@ final class Bridge: NSObject, WKScriptMessageHandler {
         case "clearKept": Offline.shared.removeAll()
         case "sleep": playback.sleep(after: m["secs"] as? Double ?? 0)
         case "route": showRoutes(m)
+        case "haptic": haptic(m["kind"] as? String)
         default: break
         }
     }
@@ -110,6 +113,16 @@ final class Bridge: NSObject, WKScriptMessageHandler {
         button.sendActions(for: primary ? .primaryActionTriggered : .touchUpInside)
     }
 
+    /// The page's presses felt (#430): light for a tap, the system's success and warning for
+    /// something done and something gone wrong, as Mail and Messages use them.
+    private func haptic(_ kind: String?) {
+        switch kind {
+        case "done": notice.notificationOccurred(.success)
+        case "warn": notice.notificationOccurred(.warning)
+        default: impact.impactOccurred()
+        }
+    }
+
     private static func controls(in v: UIView) -> [UIControl] {
         v.subviews.flatMap { ($0 as? UIControl).map { [$0] } ?? controls(in: $0) }
     }

ios/project.yml

@@ -25,7 +25,7 @@ targets:
       properties:
         CFBundleDisplayName: iPX
         CFBundleShortVersionString: $(MARKETING_VERSION)
-        CFBundleVersion: "7"
+        CFBundleVersion: "8"
         # Playing on with the screen locked. A plist key, not a signed entitlement, so it works on
         # a free personal team; CarPlay's own dashboard app is an entitlement Apple has to grant.
         UIBackgroundModes: [audio, fetch]

tests/native-bridge.ts

@@ -170,6 +170,11 @@ since();
 vm.runInContext('sleepIn(0)', ctx);
 ok(last('sleep')?.secs === 0, 'turning the timer off did not reach the app');
 
+// Haptics (#430): the page asks, the phone does.
+since();
+vm.runInContext('toast("Unable to play", true)', ctx);
+ok(last('haptic')?.kind === 'warn', 'an error was not felt');
+
 if (failed) { console.error(`\n${failed} failed`); process.exit(1); }
-console.log('OK: native-bridge: the host takes playback, keeping and the sleep timer, and the page follows it');
+console.log('OK: native-bridge: the host takes playback, keeping, the sleep timer and haptics, and the page follows it');
 process.exit(0);

web/CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- In the iOS app, presses are felt: play, pause, flag, pull to refresh, marking read and errors each give the phone's haptic for it (#430).
 - A sleep timer in the player: 5 minutes to an hour, then playback fades out and pauses. In the iOS app the phone keeps the time, so it works with the screen locked; the app and Safari also get an AirPlay button. On a phone the title has the player's top line to itself, with the controls either side of play below it (#429).
 - In the iOS app, Keep on this device keeps the episode on the phone, where the app's own player plays it with no connection; until now the app had no Keep button (#425).
 - An episode kept on this device says so in its row of the list, On this device, not only in its files (#413).

web/src/feedpage.ts

@@ -163,7 +163,7 @@ async function feedAction(a: string,f: Feed){
     try{ await api('/api/fetch',{method:'POST',body:JSON.stringify({feed:f.id,force:true})}); }
     catch(e){ spinEnd(); throw e; }
   }
-  if(a==='read'){ const r=await api(`/api/feeds/${encodeURIComponent(f.id)}/read-all`,{method:'POST'}); toast(`Marked ${r.marked} read`); await loadFeeds(true); renderFeed(); loadEntries(); }
+  if(a==='read'){ const r=await api(`/api/feeds/${encodeURIComponent(f.id)}/read-all`,{method:'POST'}); haptic('done'); toast(`Marked ${r.marked} read`); await loadFeeds(true); renderFeed(); loadEntries(); }
   if(a==='rm') removeFeed(f);
   if(a==='pin'){
     try{
@@ -190,7 +190,7 @@ async function allAction(a: string){
     if(!confirm(`Mark all ${n} unread item${n===1?'':'s'} read, in every feed you subscribe to?`)) return;
     try{
       const r=await api('/api/read-all',{method:'POST'});
-      toast(`Marked ${r.marked} read`); await loadFeeds(true); renderFeed(); loadEntries();
+      haptic('done'); toast(`Marked ${r.marked} read`); await loadFeeds(true); renderFeed(); loadEntries();
     }catch(e){ toast(why(e),true); }
   }
 }

web/src/gestures.ts

@@ -156,7 +156,7 @@ document.addEventListener('touchend', () => {
   if(!g) return;
   if(g.pane === 'list'){
     pullShow(0);
-    if(g.dy >= PULL) refreshFeed();
+    if(g.dy >= PULL){ haptic('tap'); refreshFeed(); }
     return;
   }
   const i = S.entries.findIndex(x => entryKey(x) === S.sel);

web/src/items.ts

@@ -524,11 +524,11 @@ async function epAction(a: string, e: Entry, el: HTMLElement|null, encId?: numbe
   const enc=(encId!=null && e.enclosures.find(x=>x.id===encId)) || e.enclosures[0];
   const path=`/api/entries/${encodeURIComponent(e.feed_id)}/${encodeURIComponent(e.guid)}`;
   try{
-    if(a==='play') play(e, encId!=null ? enc : undefined);
+    if(a==='play'){ haptic('tap'); play(e, encId!=null ? enc : undefined); }
     if(a==='offline' && enc) await toggleKept(enc, entryName(e).text);
     if(a==='share') await share(entryName(e).text, encId!=null ? enc.url : e.link!, el??undefined);
-    if(a==='flag'){ e.flagged=!e.flagged; await api(path+'/flags',{method:'POST',body:JSON.stringify({flagged:e.flagged})}); redraw(); }
-    if(a==='read'){ await setRead(e,!e.read); redraw(); }
+    if(a==='flag'){ e.flagged=!e.flagged; await api(path+'/flags',{method:'POST',body:JSON.stringify({flagged:e.flagged})}); haptic('tap'); redraw(); }
+    if(a==='read'){ await setRead(e,!e.read); haptic(e.read?'done':'tap'); redraw(); }
     if(a==='get'){
       if(!enc) return;
       await api(`/api/enclosures/${enc.id}/download`,{method:'POST'});

web/src/native.ts

@@ -24,6 +24,15 @@ const ipxHost: ((m: any) => void) | null = (() => {
 })();
 
 if (ipxHost) installNativePlayback();
+
+/// A press felt as well as seen, in the app (#430): the phone's haptics, which a page cannot reach.
+/// `tap` for play, pause and the like, `done` for something finished (marked read), `warn` for an
+/// error. An app without them ignores the message; a browser has no host to send it to.
+function haptic(kind: 'tap'|'done'|'warn'){
+  // An error toasted while the script is still loading comes here before this file has declared
+  // ipxHost, which then throws; a haptic is not worth breaking that error's toast for.
+  try{ ipxHost?.({t:'haptic', kind}); }catch{}
+}
 // Here, after ipxHost exists: in the app the button waits for the host to say it has a picker.
 paintRoute();
 

web/src/player.ts

@@ -172,7 +172,7 @@ audio.addEventListener('playing',()=>{
   asked=0; waited=0;
 });
 audio.addEventListener('error',()=>{ if(audio.error) report('player_error',{msg:`media error ${audio.error.code}: ${audio.error.message}`,...playing()}); });
-$<HTMLButtonElement>('#pplay').onclick=()=>audio.paused?audio.play():audio.pause();
+$<HTMLButtonElement>('#pplay').onclick=()=>{haptic('tap');audio.paused?audio.play():audio.pause()};
 $<HTMLButtonElement>('#pback').onclick=()=>audio.currentTime-=15;
 $<HTMLButtonElement>('#pfwd').onclick=()=>audio.currentTime+=30;
 $<HTMLInputElement>('#seek').oninput=(e: Event)=>{const d=audio.duration;if(d)audio.currentTime=d*Number((e.target as HTMLInputElement).value)/1000};

web/src/util.ts

@@ -228,6 +228,7 @@ async function share(title: string, url: string, btn?: HTMLElement){
 function toast(msg: string, bad?: boolean){
   const t=document.createElement('div'), box=$('#toasts');
   t.className='toast'+(bad?' bad':''); t.textContent=msg;
+  if(bad) haptic('warn');
   const go=()=>{t.style.opacity='0';t.style.transition='opacity .3s';setTimeout(()=>t.remove(),320)};
   // An error stays until it is put away: gone after six seconds, it was easy to miss and could not
   // be read again (#303).