fix(embed): implement robust EmbedPlayerModal and guard resetTorrentStats

- Add `js/ui/components/EmbedPlayerModal.js` to implement the `VideoModal` interface for embed contexts (including `resetStats`).
- Update `js/ui/ModalManager.js` to detect embed mode and use `EmbedPlayerModal`.
- Clean up `js/embed.js` to remove local modal definition and add `postMessage` diagnostic logging.
- Update `js/app.js` `resetTorrentStats` log message and verify guard.
- Add unit tests for `EmbedPlayerModal` and `resetTorrentStats` logic.
- Add E2E reproduction script `tests/e2e/repro_issue.spec.ts`.

js/app.js

@@ -4906,7 +4906,7 @@ class Application {
         this.videoModal.resetStats();
       } else {
         devLogger.info(
-          "[Application] resetTorrentStats: videoModal.resetStats not available in this context — skipping."
+          "[Application] resetTorrentStats: videoModal.resetStats not available — skipping."
         );
       }
     }

js/embed.js

@@ -5,13 +5,52 @@ import { resolveVideoPointer } from "./utils/videoPointer.js";
 import { devLogger, userLogger } from "./utils/logger.js";
 import { nostrToolsReady } from "./nostrToolsBootstrap.js";
 
+// Diagnostic forwarder for embed debugging
+function postToParent(type, payload) {
+  try {
+    if (window.parent !== window) {
+      window.parent.postMessage({ __bitvid_debug: true, type, payload }, "*");
+    }
+  } catch (e) {
+    /* no-op */
+  }
+}
+
+window.addEventListener("error", (ev) => {
+  postToParent("error", {
+    message: ev.message,
+    filename: ev.filename,
+    lineno: ev.lineno,
+    colno: ev.colno,
+    stack: ev.error && ev.error.stack,
+  });
+});
+
+window.addEventListener("unhandledrejection", (ev) => {
+  postToParent("unhandledrejection", {
+    reason: (ev.reason && ev.reason.stack) || String(ev.reason),
+  });
+});
+
+["log", "info", "warn", "error", "debug"].forEach((level) => {
+  if (console[level]) {
+    const orig = console[level].bind(console);
+    console[level] = (...args) => {
+      postToParent("console", {
+        level,
+        args: args.map((a) => (typeof a === "string" ? a : String(a))),
+      });
+      orig(...args);
+    };
+  }
+});
+
 const POINTER_PARAM = "pointer";
 const PLAYBACK_PARAM = "playback";
 const HEX64_REGEX = /^[0-9a-f]{64}$/i;
 
 const statusEl = document.getElementById("embedStatus");
 const videoEl = document.getElementById("embedVideo");
-const rootEl = document.getElementById("embedRoot");
 
 const toneClasses = {
   default: "text-muted",
@@ -24,8 +63,7 @@ const setStatus = (message, tone = "default") => {
     return;
   }
 
-  const normalizedMessage =
+  const normalizedMessage = typeof message === "string" ? message.trim() : "";
-    typeof message === "string" ? message.trim() : "";
   statusEl.textContent = normalizedMessage;
 
   Object.values(toneClasses).forEach((className) => {
@@ -40,102 +78,15 @@ const setStatus = (message, tone = "default") => {
   }
 };
 
-class EmbedVideoModal {
+// ModalManager will instantiate EmbedPlayerModal automatically when running in embed mode.
-  constructor({ root, video, status } = {}) {
+const app = new Application();
-    this.root = root || null;
-    this.video = video || null;
-    this.status = status || null;
-    this.eventTarget = new EventTarget();
-  }
-
-  addEventListener(...args) {
-    this.eventTarget.addEventListener(...args);
-  }
-
-  removeEventListener(...args) {
-    this.eventTarget.removeEventListener(...args);
-  }
-
-  dispatchEvent(event) {
-    return this.eventTarget.dispatchEvent(event);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-  getVideoElement() {
-    return this.video;
-  }
-
-  setVideoElement(videoElement) {
-    if (videoElement instanceof HTMLVideoElement) {
-      this.video = videoElement;
-    }
-    return this.video;
-  }
-
-  resetStats() {
-    // No-op for embed view
-  }
-
-  updateStatus(message) {
-    setStatus(message, "default");
-  }
-
-  applyLoadingPoster() {
-    setStatus("Preparing playback…", "default");
-  }
-
-  forceRemovePoster() {
-    return false;
-  }
-
-  clearPosterCleanup() {}
-
-  setTorrentStatsVisibility(isVisible) {
-    if (!this.root) {
-      return;
-    }
-    this.root.dataset.torrentStats = isVisible ? "true" : "false";
-  }
-
-  open() {
-    return this.root;
-  }
-
-  close() {}
-
-  async load() {
-    if (!this.video || !(this.video instanceof HTMLVideoElement)) {
-      throw new Error("Embed video element is missing.");
-    }
-    return this.root;
-  }
-}
-
-const embedModal = new EmbedVideoModal({
-  root: rootEl,
-  video: videoEl,
-  status: statusEl,
-});
-
-const app = new Application({
-  ui: {
-    videoModal: embedModal,
-  },
-});
 
 app.showError = (message) => {
-  const normalizedMessage =
+  const normalizedMessage = typeof message === "string" ? message.trim() : "";
-    typeof message === "string" ? message.trim() : "";
   if (normalizedMessage) {
     userLogger.error(normalizedMessage);
   }
-  setStatus(
+  setStatus(normalizedMessage || "Playback failed. Please try again.", "error");
-    normalizedMessage || "Playback failed. Please try again.",
-    "error",
-  );
 };
 
 app.showStatus = (message) => {
@@ -228,8 +179,8 @@ const buildRelayList = (relays) => {
     new Set(
       combined
         .map((relay) => (typeof relay === "string" ? relay.trim() : ""))
-        .filter(Boolean),
+        .filter(Boolean)
-    ),
+    )
   );
 };
 
@@ -308,7 +259,7 @@ const resolveEventFromPointer = async (pointer) => {
         if (Array.isArray(events) && events.length) {
           const flattened = events.flat().filter(Boolean);
           rawEvent = flattened.sort(
-            (a, b) => (b.created_at || 0) - (a.created_at || 0),
+            (a, b) => (b.created_at || 0) - (a.created_at || 0)
           )[0];
         }
       } catch (error) {

js/ui/ModalManager.js

@@ -7,6 +7,7 @@ import { VideoModal } from "./components/VideoModal.js";
 import { RevertModal } from "./components/RevertModal.js";
 import { ShareNostrModal } from "./components/ShareNostrModal.js";
 import { EmbedVideoModal } from "./components/EmbedVideoModal.js";
+import { EmbedPlayerModal } from "./components/EmbedPlayerModal.js";
 import initUploadModal from "./initUploadModal.js";
 import initEditModal from "./initEditModal.js";
 import initDeleteModal from "./initDeleteModal.js";
@@ -195,29 +196,36 @@ export default class ModalManager {
     });
     app.embedVideoModal = this.embedVideoModal;
 
+    const isEmbedMode = typeof window !== "undefined" && window.location.pathname.endsWith("/embed.html");
+
     this.videoModal =
       (typeof this.ui.videoModal === "function"
         ? this.ui.videoModal({ app })
         : this.ui.videoModal) ||
-      new VideoModal({
+      (isEmbedMode
-        removeTrackingScripts,
+        ? new EmbedPlayerModal({
-        setGlobalModalState,
+            document: doc,
-        document: doc,
+            logger: { log: (...a) => app.log(...a) },
-        logger: {
+          })
-          log: (message, ...args) => app.log(message, ...args),
+        : new VideoModal({
-        },
+            removeTrackingScripts,
-        mediaLoader: app.mediaLoader,
+            setGlobalModalState,
-        assets: {
+            document: doc,
-          fallbackThumbnailSrc: this.assets.fallbackThumbnailSrc,
+            logger: {
-        },
+              log: (message, ...args) => app.log(message, ...args),
-        state: {
+            },
-          loadedThumbnails: app.loadedThumbnails,
+            mediaLoader: app.mediaLoader,
-        },
+            assets: {
-        helpers: {
+              fallbackThumbnailSrc: this.assets.fallbackThumbnailSrc,
-          safeEncodeNpub: (pubkey) => app.safeEncodeNpub(pubkey),
+            },
-          formatShortNpub: (value) => formatShortNpub(value),
+            state: {
-        },
+              loadedThumbnails: app.loadedThumbnails,
-      });
+            },
+            helpers: {
+              safeEncodeNpub: (pubkey) => app.safeEncodeNpub(pubkey),
+              formatShortNpub: (value) => formatShortNpub(value),
+            },
+          }));
 
     if (
       this.videoModal &&

js/ui/components/EmbedPlayerModal.js

@@ -0,0 +1,106 @@
+export class EmbedPlayerModal {
+  constructor({ document: doc, logger } = {}) {
+    this.document = doc || (typeof document !== "undefined" ? document : null);
+    this.logger = logger || console;
+    this.root = null;
+    this.video = null;
+    this.status = null;
+    this.eventTarget = new EventTarget();
+
+    this.toneClasses = {
+      default: "text-muted",
+      error: "text-danger",
+      success: "text-success",
+    };
+  }
+
+  load() {
+    if (this.document) {
+      this.root = this.document.getElementById("embedRoot");
+      this.video = this.document.getElementById("embedVideo");
+      this.status = this.document.getElementById("embedStatus");
+    }
+    return Promise.resolve(this.root);
+  }
+
+  getRoot() {
+    return this.root;
+  }
+
+  getVideoElement() {
+    return this.video;
+  }
+
+  setVideoElement(videoElement) {
+    if (videoElement) {
+      this.video = videoElement;
+    }
+    return this.video;
+  }
+
+  resetStats() {
+    // no-op for embed view
+  }
+
+  setStatus(message, tone = "default") {
+    if (!this.status) {
+      return;
+    }
+
+    const normalizedMessage = typeof message === "string" ? message.trim() : "";
+    this.status.textContent = normalizedMessage;
+
+    Object.values(this.toneClasses).forEach((className) => {
+      if (className) {
+        this.status.classList.remove(className);
+      }
+    });
+
+    const toneClass = this.toneClasses[tone] || this.toneClasses.default;
+    if (toneClass) {
+      this.status.classList.add(toneClass);
+    }
+  }
+
+  updateStatus(message) {
+    this.setStatus(message, "default");
+  }
+
+  applyLoadingPoster() {
+    this.setStatus("Preparing playback…", "default");
+  }
+
+  forceRemovePoster() {
+    return false;
+  }
+
+  clearPosterCleanup() {}
+
+  setTorrentStatsVisibility(isVisible) {
+    if (!this.root) {
+      return;
+    }
+    this.root.dataset.torrentStats = isVisible ? "true" : "false";
+  }
+
+  open() {
+    return this.root;
+  }
+
+  close() {}
+
+  updateMetadata() {}
+  setShareEnabled() {}
+
+  addEventListener(type, listener, options) {
+    this.eventTarget.addEventListener(type, listener, options);
+  }
+
+  removeEventListener(type, listener, options) {
+    this.eventTarget.removeEventListener(type, listener, options);
+  }
+
+  dispatch(type, detail) {
+    return this.eventTarget.dispatchEvent(new CustomEvent(type, { detail }));
+  }
+}

tests/e2e/repro_issue.spec.ts

@@ -0,0 +1,112 @@
+import { test, expect } from '@playwright/test';
+import { startRelay } from '../../scripts/agent/simple-relay.mjs';
+import { WebSocket } from 'ws';
+import { finalizeEvent, getPublicKey, nip19 } from 'nostr-tools';
+
+// Polyfill WebSocket for node environment
+if (!global.WebSocket) {
+    global.WebSocket = WebSocket;
+}
+
+const RELAY_PORT = 8899;
+const RELAY_URL = `ws://127.0.0.1:${RELAY_PORT}`;
+
+test.describe('Embed Player', () => {
+  let relayServer;
+
+  test.beforeAll(async () => {
+    relayServer = startRelay(RELAY_PORT);
+  });
+
+  test.afterAll(async () => {
+    if (relayServer) {
+        await relayServer.close();
+    }
+  });
+
+  test('reproduce embed resetStats error', async ({ page }) => {
+    // 1. Create a dummy video event
+    const sk = Uint8Array.from(Buffer.from('7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b7b', 'hex'));
+    const pk = getPublicKey(sk);
+
+    const event = finalizeEvent({
+      kind: 30078,
+      created_at: Math.floor(Date.now() / 1000),
+      tags: [
+        ['d', 'test-video'],
+        ['title', 'Test Video'],
+        ['url', 'https://example.com/video.mp4'],
+      ],
+      content: '',
+      pubkey: pk,
+    }, sk);
+
+    // 2. Publish event to local relay
+    await new Promise((resolve, reject) => {
+        const ws = new WebSocket(RELAY_URL);
+        ws.on('open', () => {
+            ws.send(JSON.stringify(['EVENT', event]));
+        });
+        ws.on('message', (msg) => {
+            const data = JSON.parse(msg.toString());
+            if (data[0] === 'OK') {
+                ws.close();
+                resolve();
+            }
+        });
+        ws.on('error', (e) => {
+            reject(e);
+        });
+    });
+
+    // 3. Construct nevent
+    const nevent = nip19.neventEncode({
+        id: event.id,
+        relays: [RELAY_URL]
+    });
+
+    // 4. Navigate
+    const consoleMessages = [];
+    page.on('console', msg => consoleMessages.push(msg.text()));
+
+    const errors = [];
+    page.on('pageerror', err => {
+        errors.push(err);
+        console.log('PAGE ERROR:', err.message);
+    });
+
+    // Force local storage cleanup or setup if needed
+    // The memory said: "Frontend verification scripts using Playwright must inject localStorage.setItem('hasSeenDisclaimer', 'true')"
+    await page.addInitScript(() => {
+        localStorage.setItem('hasSeenDisclaimer', 'true');
+    });
+
+    const embedUrl = `/embed.html?pointer=${nevent}&playback=url`;
+    await page.goto(embedUrl);
+
+    // 5. Wait for video attempt
+    // We expect the status to change from "Loading video..."
+    // If it crashes, it might not change, or it might change to "Resolving..." then crash.
+
+    // We wait for a bit to let the async playback logic run
+    try {
+        await expect(page.locator('#embedStatus')).not.toHaveText('Loading video…', { timeout: 5000 });
+        await expect(page.locator('#embedStatus')).not.toHaveText('Resolving video…', { timeout: 5000 });
+    } catch (e) {
+        console.log('Timeout waiting for status change. Current status:', await page.locator('#embedStatus').textContent());
+    }
+
+    // Check for the specific error
+    const typeError = errors.find(e => e.message && e.message.includes('this.videoModal.resetStats is not a function'));
+    if (typeError) {
+        console.error('Reproduced TypeError:', typeError);
+        // Fail the test
+        expect(typeError).toBeUndefined();
+    } else {
+        console.log('No TypeError found.');
+    }
+
+    // Log console for debugging
+    console.log('Console output:', consoleMessages.join('\n'));
+  });
+});

tests/unit/app_guard_logic.test.mjs

@@ -0,0 +1,51 @@
+import { test } from 'node:test';
+import assert from 'node:assert';
+
+/**
+ * Validates the logic used in Application.resetTorrentStats.
+ * Note: We test the function logic in isolation because importing the full Application class
+ * triggers side effects (network, webtorrent) that are difficult to mock in this unit test environment.
+ */
+function resetTorrentStats(context, logger) {
+    // Exact logic from js/app.js
+    if (context.videoModal) {
+      if (typeof context.videoModal.resetStats === "function") {
+        context.videoModal.resetStats();
+      } else {
+        logger.info(
+          "[Application] resetTorrentStats: videoModal.resetStats not available — skipping."
+        );
+      }
+    }
+}
+
+test('Application.resetTorrentStats logic', async (t) => {
+    const logger = {
+        info: () => {},
+        warn: () => {}
+    };
+
+    await t.test('does not throw when videoModal is null', () => {
+        const context = { videoModal: null };
+        assert.doesNotThrow(() => resetTorrentStats(context, logger));
+    });
+
+    await t.test('does not throw when videoModal is undefined', () => {
+        const context = { videoModal: undefined };
+        assert.doesNotThrow(() => resetTorrentStats(context, logger));
+    });
+
+    await t.test('does not throw when videoModal lacks resetStats', () => {
+        const context = { videoModal: { other: 1 } };
+        assert.doesNotThrow(() => resetTorrentStats(context, logger));
+    });
+
+    await t.test('calls resetStats when available', () => {
+        let called = false;
+        const context = {
+            videoModal: { resetStats: () => { called = true; } }
+        };
+        resetTorrentStats(context, logger);
+        assert.strictEqual(called, true);
+    });
+});

tests/unit/embed_player_modal.test.mjs

@@ -0,0 +1,34 @@
+import { test } from 'node:test';
+import assert from 'node:assert';
+import { EmbedPlayerModal } from '../../js/ui/components/EmbedPlayerModal.js';
+
+// Polyfill EventTarget for Node < 16 if needed, but likely available
+if (typeof EventTarget === 'undefined') {
+    global.EventTarget = class EventTarget {
+        constructor() { this.listeners = {}; }
+        addEventListener() {}
+        removeEventListener() {}
+        dispatchEvent() { return true; }
+    };
+}
+
+test('EmbedPlayerModal interface', async (t) => {
+    const modal = new EmbedPlayerModal();
+
+    await t.test('has expected methods', () => {
+        assert.strictEqual(typeof modal.load, 'function');
+        assert.strictEqual(typeof modal.getRoot, 'function');
+        assert.strictEqual(typeof modal.getVideoElement, 'function');
+        assert.strictEqual(typeof modal.setVideoElement, 'function');
+        assert.strictEqual(typeof modal.resetStats, 'function');
+        assert.strictEqual(typeof modal.updateStatus, 'function');
+        assert.strictEqual(typeof modal.setTorrentStatsVisibility, 'function');
+        assert.strictEqual(typeof modal.addEventListener, 'function');
+        assert.strictEqual(typeof modal.removeEventListener, 'function');
+        assert.strictEqual(typeof modal.dispatch, 'function');
+    });
+
+    await t.test('resetStats is no-op and does not throw', () => {
+        assert.doesNotThrow(() => modal.resetStats());
+    });
+});