Add privacy-safe BufferDash product events

.env.example

@@ -2,7 +2,8 @@
 NEXT_PUBLIC_DOCS_URL=
 
 # Optional. Enables the private BufferDash analytics tracker when both values are set.
-# Create the site in BufferDash, then use the generated public site key here.
+# Create the site with domain buffer.lol in BufferDash, then use its public site key here.
+# BufferDash rejects browser tracking requests from other origins by default.
 BUFFERDASH_URL=
 BUFFERDASH_SITE_ID=
 

README.md

@@ -90,7 +90,7 @@ The worker container needs `NET_RAW` for low-level network diagnostics. See `dia
 
 ## BufferDash Analytics
 
-buffer.lol can send page views, outbound clicks, sessions, and custom product events to a private BufferDash instance.
+buffer.lol can send page views, outbound clicks, sessions, and custom product events to a private BufferDash instance. Server-backed and browser-latency product events contain only the tool slug, outcome, and request duration; tool inputs are never included.
 
 1. Deploy BufferDash at a private dashboard URL, such as `https://dash.buffer.lol`.
 2. In BufferDash, open `/sites`, create a site for `buffer.lol`, and copy the generated public site key.

app/privacy/page.tsx

@@ -21,7 +21,7 @@ export default function PrivacyPage() {
           <ul>
             <li>Input used in browser-ready developer tools is processed on your device and is not submitted to buffer.lol.</li>
             <li>Server-backed network and IP tools process the target you submit, the request metadata needed to complete the check, and short-lived diagnostic results.</li>
-            <li>Private analytics may collect page paths, referrers, session identifiers, outbound clicks, browser metadata, user agent, IP-derived signals, and timing information so we can understand usage and abuse patterns.</li>
+            <li>Private analytics may collect page paths, referrers, session identifiers, outbound clicks, browser metadata, user agent, IP-derived signals, and timing information. Server-backed and browser latency/stability checks may also record the tool slug, outcome, and duration, but not the submitted target or browser-local tool input.</li>
             <li>Your email address and message content if you contact us.</li>
             <li>Basic technical metadata collected by the hosting platform, such as request time, IP address, user agent, and abuse-prevention signals.</li>
           </ul>

components/tools/ToolExperience.tsx

@@ -4,6 +4,18 @@ import { useMemo, useState, useSyncExternalStore } from "react";
 import type { Tool } from "@/data/tools";
 import { ResultPanel } from "./ResultPanel";
 
+type BufferDashWindow = Window & {
+  bufferdash?: {
+    track: (type: string, metadata?: Record<string, string | number | boolean>) => void;
+  };
+};
+
+function trackToolUse(tool: string, outcome: "success" | "error", durationMs?: number) {
+  const metadata: Record<string, string | number | boolean> = { tool, outcome };
+  if (typeof durationMs === "number") metadata.durationMs = Math.round(durationMs);
+  (window as BufferDashWindow).bufferdash?.track("tool_used", metadata);
+}
+
 export function ToolExperience({ tool }: { tool: Tool }) {
   switch (tool.slug) {
     case "ping": return <BrowserLatencyTool mode="ping" />;
@@ -518,9 +530,12 @@ function BrowserLatencyTool({ mode }: { mode: "ping" | "stability" }) {
         if (index < sampleCount - 1) await wait(160);
       }
 
-      setResult({ kind: "success", samples, summary: summarizeLatencySamples(samples) });
+      const summary = summarizeLatencySamples(samples);
+      setResult({ kind: "success", samples, summary });
+      trackToolUse(mode, summary.received > 0 ? "success" : "error", summary.avgMs ?? undefined);
     } catch (error) {
       setResult({ kind: "error", message: error instanceof Error ? error.message : "The latency test failed." });
+      trackToolUse(mode, "error");
     }
   }
 
@@ -703,6 +718,7 @@ function BackendPlaceholder({ tool }: { tool: Tool }) {
           durationMs: payload.durationMs,
           requestId: payload.requestId
         });
+        trackToolUse(tool.slug, "error", payload.durationMs);
         return;
       }
 
@@ -712,11 +728,13 @@ function BackendPlaceholder({ tool }: { tool: Tool }) {
         durationMs: payload.durationMs,
         requestId: payload.requestId
       });
+      trackToolUse(tool.slug, "success", payload.durationMs);
     } catch (error) {
       setResult({
         kind: "error",
         message: error instanceof Error ? error.message : "The backend request failed."
       });
+      trackToolUse(tool.slug, "error");
     }
   }