account system and syslogs

2026-07-26 18:31:43 +00:00
parent 540f6e0af1
commit 6f7af751e1
37 changed files with 2475 additions and 258 deletions
@@ -0,0 +1,59 @@
+/**
+ * Best-effort device / browser label from a User-Agent string.
+ * Not for security decisions — display and audit only.
+ */
+export function parseDeviceFromUserAgent(
+  userAgent: string | null | undefined,
+): { device: string; userAgent: string | null } {
+  const ua = userAgent?.trim() || null;
+  if (!ua) {
+    return { device: "Unknown device", userAgent: null };
+  }
+
+  const os =
+    /Windows NT/i.test(ua)
+      ? "Windows"
+      : /Android/i.test(ua)
+        ? "Android"
+        : /iPhone|iPad|iPod/i.test(ua)
+          ? "iOS"
+          : /Mac OS X|Macintosh/i.test(ua)
+            ? "macOS"
+            : /CrOS/i.test(ua)
+              ? "Chrome OS"
+              : /Linux/i.test(ua)
+                ? "Linux"
+                : null;
+
+  const browser =
+    /Edg\//i.test(ua)
+      ? "Edge"
+      : /OPR\/|Opera/i.test(ua)
+        ? "Opera"
+        : /Firefox\//i.test(ua)
+          ? "Firefox"
+          : /Chrome\//i.test(ua) && !/Edg\//i.test(ua)
+            ? "Chrome"
+            : /Safari\//i.test(ua) && !/Chrome\//i.test(ua)
+              ? "Safari"
+              : /curl\//i.test(ua)
+                ? "curl"
+                : null;
+
+  const formFactor = /Mobile|Android.*Mobile|iPhone|iPod/i.test(ua)
+    ? "Mobile"
+    : /iPad|Tablet|Android(?!.*Mobile)/i.test(ua)
+      ? "Tablet"
+      : "Desktop";
+
+  const parts = [formFactor, os, browser].filter(Boolean);
+  return {
+    device: parts.length > 0 ? parts.join(" · ") : "Unknown device",
+    userAgent: ua.slice(0, 512),
+  };
+}
+
+export function getRequestUserAgent(request: Request): string | null {
+  const ua = request.headers.get("user-agent")?.trim();
+  return ua || null;
+}