feat: add editor screen

packages/utils/src/nip01.ts

@@ -0,0 +1,96 @@
+import { nip19 } from "nostr-tools";
+import { EventPointer, ProfilePointer } from "nostr-tools/lib/types/nip19";
+
+// Borrow from NDK
+// https://github.com/nostr-dev-kit/ndk/blob/master/ndk/src/events/content-tagger.ts
+export async function generateContentTags(content: string) {
+	let promises: Promise<void>[] = [];
+	let tags: string[][] = [];
+
+	const tagRegex = /(@|nostr:)(npub|nprofile|note|nevent|naddr)[a-zA-Z0-9]+/g;
+	const hashtagRegex = /#(\w+)/g;
+
+	const addTagIfNew = (t: string[]) => {
+		if (!tags.find((t2) => t2[0] === t[0] && t2[1] === t[1])) {
+			tags.push(t);
+		}
+	};
+
+	content = content.replace(tagRegex, (tag) => {
+		try {
+			const entity = tag.split(/(@|nostr:)/)[2];
+			const { type, data } = nip19.decode(entity);
+			let t: string[] | undefined;
+
+			switch (type) {
+				case "npub":
+					t = ["p", data as string];
+					break;
+				case "nprofile":
+					t = ["p", (data as ProfilePointer).pubkey as string];
+					break;
+				case "note":
+					promises.push(
+						new Promise(async (resolve) => {
+							addTagIfNew(["e", data, "", "mention"]);
+							resolve();
+						}),
+					);
+					break;
+				case "nevent":
+					promises.push(
+						new Promise(async (resolve) => {
+							let { id, relays, author } = data as EventPointer;
+
+							// If the nevent doesn't have a relay specified, try to get one
+							if (!relays || relays.length === 0) {
+								relays = [""];
+							}
+
+							addTagIfNew(["e", id, relays[0], "mention"]);
+							if (author) addTagIfNew(["p", author]);
+							resolve();
+						}),
+					);
+					break;
+				case "naddr":
+					promises.push(
+						new Promise(async (resolve) => {
+							const id = [data.kind, data.pubkey, data.identifier].join(":");
+							let relays = data.relays ?? [];
+
+							// If the naddr doesn't have a relay specified, try to get one
+							if (relays.length === 0) {
+								relays = [""];
+							}
+
+							addTagIfNew(["a", id, relays[0], "mention"]);
+							addTagIfNew(["p", data.pubkey]);
+							resolve();
+						}),
+					);
+					break;
+				default:
+					return tag;
+			}
+
+			if (t) addTagIfNew(t);
+
+			return `nostr:${entity}`;
+		} catch (error) {
+			return tag;
+		}
+	});
+
+	await Promise.all(promises);
+
+	content = content.replace(hashtagRegex, (tag, word) => {
+		const t: string[] = ["t", word];
+		if (!tags.find((t2) => t2[0] === t[0] && t2[1] === t[1])) {
+			tags.push(t);
+		}
+		return tag; // keep the original tag in the content
+	});
+
+	return { content, tags };
+}