wip pt1

lib/utils.ts

@@ -1,6 +1,62 @@
 import { clsx, type ClassValue } from "clsx"
+
+// Extend the Window interface to include the nostr property
+declare global {
+  interface Window {
+    nostr: {
+      signEvent: (event: NostrEvent) => Promise<NostrEvent>;
+    };
+  }
+}
 import { twMerge } from "tailwind-merge"
+import { Event as NostrEvent, finalizeEvent} from "nostr-tools";
+import { hexToBytes } from "@noble/hashes/utils"
 
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs))
 }
+
+export function getImageUrl(tags: string[][]): string {
+  const imetaTag = tags.find(tag => tag[0] === 'imeta');
+  if (imetaTag) {
+    const urlItem = imetaTag.find(item => item.startsWith('url '));
+    if (urlItem) {
+      return urlItem.split(' ')[1];
+    }
+  }
+  return '';
+}
+
+export function extractDimensions(event: NostrEvent): { width: number; height: number } {
+  const imetaTag = event.tags.find(tag => tag[0] === 'imeta');
+  if (imetaTag) {
+    const dimInfo = imetaTag.find(item => item.startsWith('dim '));
+    if (dimInfo) {
+      const [width, height] = dimInfo.split(' ')[1].split('x').map(Number);
+      return { width, height };
+    }
+  }
+  return { width: 500, height: 300 }; // Default dimensions if not found
+}
+
+export async function signEvent(loginType: string | null, event: NostrEvent): Promise<NostrEvent | null> {
+    // Sign event
+  let eventSigned: NostrEvent = { ...event, sig: '' };
+  if (loginType === 'extension') {
+    eventSigned = await window.nostr.signEvent(event);
+  } else if (loginType === 'amber') {
+    // TODO: Sign event with amber
+    alert('Signing with Amber is not implemented yet, sorry!');
+    return null;
+  } else if (loginType === 'raw_nsec') {
+    if (typeof window !== 'undefined') {
+      let nsecStr = null;
+      nsecStr = window.localStorage.getItem('nsec');
+      if (nsecStr != null) {
+        eventSigned = finalizeEvent(event, hexToBytes(nsecStr));
+      }
+    }
+  }
+  console.log(eventSigned);
+  return eventSigned;
+}