DM styles update

packages/system-react/src/useUserSearch.tsx

@@ -0,0 +1,37 @@
+import { useContext } from "react";
+import { NostrPrefix, UserProfileCache, tryParseNostrLink } from "@snort/system";
+import { fetchNip05Pubkey } from "@snort/shared";
+import { SnortContext } from "./context";
+
+export function useUserSearch() {
+    const system = useContext(SnortContext);
+    const cache = system.ProfileLoader.Cache as UserProfileCache;
+
+    async function search(input: string): Promise<Array<string>> {
+        // try exact match first
+        if (input.length === 64 && [...input].every(c => !isNaN(parseInt(c, 16)))) {
+            return [input];
+        }
+
+        if (input.startsWith(NostrPrefix.PublicKey) || input.startsWith(NostrPrefix.Profile)) {
+            const link = tryParseNostrLink(input);
+            if (link) {
+                return [link.id]
+            }
+        }
+
+        if (input.includes("@")) {
+            const [name, domain] = input.split("@");
+            const pk = await fetchNip05Pubkey(name, domain);
+            if (pk) {
+                return [pk];
+            }
+        }
+
+        // search cache
+        const cacheResults = await cache.search(input);
+        return cacheResults.map(v => v.pubkey);
+    }
+
+    return search;
+}