[client] Authorize daemon IPC callers by their local identity (#6967)

client/ui/frontend/src/lib/errors.ts

@@ -1,6 +1,6 @@
 import { WindowManager } from "@bindings/services";
 
-type ClassifiedError = { short: string; long: string };
+type ClassifiedError = { short: string; long: string; command: string };
 
 const asObject = (v: unknown): Record<string, unknown> | null =>
     v && typeof v === "object" ? (v as Record<string, unknown>) : null;
@@ -22,20 +22,24 @@ const toWailsEnvelope = (e: unknown): Record<string, unknown> | null => {
     return asObject(obj.cause) ?? parseJsonObject(obj.message);
 };
 
-// Read { short, long } from wherever the classified error sits in the envelope
+// Read { short, long, command } from wherever the classified error sits in the envelope
 const toClassifiedError = (v: unknown): ClassifiedError | null => {
     const o = asObject(v);
     if (!o) return null;
     const short = typeof o.short === "string" ? o.short : "";
     const long = typeof o.long === "string" ? o.long : "";
-    return short || long ? { short, long } : null;
+    const command = typeof o.command === "string" ? o.command : "";
+    return short || long ? { short, long, command } : null;
+};
+
+const classify = (e: unknown): ClassifiedError | null => {
+    const envelope = toWailsEnvelope(e);
+    return toClassifiedError(envelope?.cause) ?? toClassifiedError(envelope);
 };
 
 export const formatErrorMessage = (e: unknown): string => {
-    const envelope = toWailsEnvelope(e);
-
     // Prefer the structured { short, long } the daemon classifier produced.
-    const classified = toClassifiedError(envelope?.cause) ?? toClassifiedError(envelope);
+    const classified = classify(e);
     if (classified) {
         const { short, long } = classified;
         if (short && long && long !== short) return `${short} Details: ${long}`;
@@ -44,17 +48,26 @@ export const formatErrorMessage = (e: unknown): string => {
     }
 
     // Unclassified (a service returned the raw daemon error)
+    const envelope = toWailsEnvelope(e);
     const message = envelope?.message;
     if (typeof message === "string" && message) return message;
     if (e instanceof Error) return e.message;
     return String(e);
 };
 
+// errorCommand returns a command the user can run to complete an operation the
+// daemon refused, when the error carries one (a change that needs elevated
+// privileges). Empty for every other error.
+export const errorCommand = (e: unknown): string => classify(e)?.command ?? "";
+
 export type ErrorDialogOptions = {
     Title: string;
     Message: string;
+    // Command is shown for copying below the message. Defaults to the one the
+    // error carries, so callers only pass it to override.
+    Command?: string;
 };
 
 export function errorDialog(options: ErrorDialogOptions): Promise<void> {
-    return WindowManager.OpenError(options.Title, options.Message);
+    return WindowManager.OpenError(options.Title, options.Message, options.Command ?? "");
 }