1 files changed, 79 insertions, 0 deletions
diff --git a/src/trace.js b/src/trace.js
new file mode 100644
index 0000000..8717ff1
--- /dev/null
+++ b/src/trace.js
@@ -0,0 +1,79 @@
+// Daemon diagnostic traces (WA_CLI_TRACE=1 or "trace": true in config.json).
+// Logs: CDP/evaluate calls still pending after >15 s, exceptions inside functions exposed
+// to the page (puppeteer swallows them), navigations and client events.
+// Useful to see where whatsapp-web.js hangs when it never reaches `ready`.
+
+import { createRequire } from 'node:module';
+
+const require = createRequire(import.meta.url);
+const QUIET = new Set(['loading_screen', 'message', 'message_create', 'message_ack', 'unread_count', 'media_uploaded']);
+
+export function enableTrace(log) {
+    const { CdpPage } = require('puppeteer-core/lib/cjs/puppeteer/cdp/Page.js');
+    const { CdpCDPSession } = require('puppeteer-core/lib/cjs/puppeteer/cdp/CdpSession.js');
+    const wweb = require('whatsapp-web.js');
+    const t = (...a) => log('trace:', ...a);
+
+    const pending = new Map();
+    let seq = 0;
+    const track = (desc, p) => {
+        const id = ++seq;
+        pending.set(id, { desc, start: Date.now() });
+        const done = () => pending.delete(id);
+        p.then(done, (e) => {
+            done();
+            t('error', desc, String(e?.message ?? e).slice(0, 200));
+        });
+        return p;
+    };
+    setInterval(() => {
+        for (const p of pending.values()) {
+            const s = Math.round((Date.now() - p.start) / 1000);
+            if (s >= 15 && s % 15 === 0) t(`pendiente ${s}s:`, p.desc);
+        }
+    }, 1000).unref();
+
+    const send = CdpCDPSession.prototype.send;
+    CdpCDPSession.prototype.send = function (method, ...args) {
+        return track(`cdp ${method}`, send.call(this, method, ...args));
+    };
+
+    const expose = CdpPage.prototype.exposeFunction;
+    CdpPage.prototype.exposeFunction = function (name, fn) {
+        const wrapped = async (...args) => {
+            try {
+                return await fn(...args);
+            } catch (e) {
+                t(`exception in ${name}:`, String(e?.stack ?? e).split('\n').slice(0, 4).join(' | '));
+                throw e;
+            }
+        };
+        return track(`exposeFunction(${name})`, expose.call(this, name, wrapped));
+    };
+
+    const emit = wweb.Client.prototype.emit;
+    wweb.Client.prototype.emit = function (event, ...args) {
+        if (!QUIET.has(event)) t('evento', event, event === 'disconnected' || event === 'change_state' ? args[0] : '');
+        return emit.call(this, event, ...args);
+    };
+
+    const init = wweb.Client.prototype.initialize;
+    wweb.Client.prototype.initialize = function (...args) {
+        const iv = setInterval(() => {
+            if (!this.pupPage) return;
+            clearInterval(iv);
+            const page = this.pupPage;
+            page.on('framenavigated', (f) => t('framenavigated', f === page.mainFrame() ? 'main' : 'iframe', f.url().slice(0, 60)));
+            page.on('load', () => t('load'));
+            page.on('pageerror', (e) => t('pageerror', String(e?.message ?? e).slice(0, 150)));
+        }, 20);
+        return init.apply(this, args);
+    };
+
+    const inject = wweb.Client.prototype.inject;
+    wweb.Client.prototype.inject = function (...args) {
+        t('inject()');
+        return track('inject()', inject.apply(this, args));
+    };
+    if (inject.waCompat) wweb.Client.prototype.inject.waCompat = true;
+}