feat: Setup the CLI and create repo view command

Signed-off-by: Awiteb <a@4rs.nl>

src/cli/parsers.rs

@@ -0,0 +1,39 @@
+// n34 - A CLI to interact with NIP-34 and other stuff related to codes in nostr
+// Copyright (C) 2025 Awiteb <a@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://gnu.org/licenses/gpl-3.0.html>.
+
+use nostr::{
+    Kind,
+    nips::nip19::{FromBech32, Nip19Coordinate},
+};
+
+/// Parses a Nostr naddr string into a Git repository announcement coordinate.
+///
+/// # Errors
+/// Returns an error if:
+/// - The bech32 decoding fails
+/// - The naddr doesn't represent a Git repository announcement (kind != 30617)
+pub fn repo_naddr(naddr: &str) -> Result<Nip19Coordinate, String> {
+    let naddr = Nip19Coordinate::from_bech32(naddr).map_err(|err| err.to_string())?;
+    if naddr.kind != Kind::GitRepoAnnouncement {
+        return Err("The naddr is not repo announcement address".to_owned());
+    }
+
+    if naddr.relays.is_empty() {
+        tracing::warn!("The repository naddr does not contain any relay hints");
+    }
+
+    Ok(naddr)
+}