Move error tracking and analytics to their own files

src/app/analytics.ts

@@ -0,0 +1,17 @@
+import {page} from "$app/stores"
+
+const w = window as any
+
+w.plausible =
+  w.plausible ||
+  function () {
+    ;(w.plausible.q = w.plausible.q || []).push(arguments)
+  }
+
+export const setupAnalytics = () => {
+  page.subscribe($page => {
+    if ($page.route) {
+      w.plausible("pageview", {u: $page.route.id})
+    }
+  })
+}

src/app/tracking.ts

@@ -0,0 +1,32 @@
+import Bugsnag from "@bugsnag/js"
+
+export const setupTracking = () => {
+  if (!import.meta.env.VITE_BUGSNAG_API_KEY) return
+
+  // Initialize
+  Bugsnag.start({
+    apiKey: import.meta.env.VITE_BUGSNAG_API_KEY,
+    collectUserIp: false,
+  })
+
+  // Redact long strings, especially hex and bech32 keys which are 64 and 63
+  // characters long, respectively. Put the threshold a little lower in case
+  // someone accidentally enters a key with the last few digits missing
+  const redactErrorInfo = (info: any) =>
+    JSON.parse(
+      JSON.stringify(info || null)
+        .replace(/\d+:{60}\w+:\w+/g, "[REDACTED]")
+        .replace(/\w{60}\w+/g, "[REDACTED]"),
+    )
+
+  Bugsnag.addOnError((event: any) => {
+    // Redact individual properties since the event needs to be
+    // mutated, and we don't want to lose the prototype
+    event.context = redactErrorInfo(event.context)
+    event.request = redactErrorInfo(event.request)
+    event.exceptions = redactErrorInfo(event.exceptions)
+    event.breadcrumbs = redactErrorInfo(event.breadcrumbs)
+
+    return true
+  })
+}