refactor: improve relay management code structure (#220)

src-tauri/src/nostr/relay.rs

@@ -1,12 +1,11 @@
-use std::{
-  fs,
-  io::{self, BufRead, Write},
-};
-
 use crate::Nostr;
 use nostr_sdk::prelude::*;
 use serde::Serialize;
 use specta::Type;
+use std::{
+  fs::OpenOptions,
+  io::{self, BufRead, Write},
+};
 use tauri::{path::BaseDirectory, Manager, State};
 
 #[derive(Serialize, Type)]
@@ -22,13 +21,16 @@ pub struct Relays {
 pub async fn get_relays(state: State<'_, Nostr>) -> Result<Relays, String> {
   let client = &state.client;
 
-  // Get connected relays
+  let connected_relays = client
-  let list = client.relays().await;
+    .relays()
-  let connected_relays: Vec<String> = list.into_keys().map(|url| url.to_string()).collect();
+    .await
+    .into_keys()
+    .map(|url| url.to_string())
+    .collect::<Vec<_>>();
 
-  // Get NIP-65 relay list
   let signer = client.signer().await.map_err(|e| e.to_string())?;
   let public_key = signer.public_key().await.map_err(|e| e.to_string())?;
+
   let filter = Filter::new()
     .author(public_key)
     .kind(Kind::RelayList)
@@ -38,22 +40,35 @@ pub async fn get_relays(state: State<'_, Nostr>) -> Result<Relays, String> {
     Ok(events) => {
       if let Some(event) = events.first() {
         let nip65_list = nip65::extract_relay_list(event);
-        let read: Vec<String> = nip65_list
+        let read = nip65_list
-          .clone()
+          .iter()
-          .into_iter()
+          .filter_map(|(url, meta)| {
-          .filter(|i| matches!(&i.1, Some(y) if *y == RelayMetadata::Read))
+            if let Some(RelayMetadata::Read) = meta {
-          .map(|(url, _)| url.to_string())
+              Some(url.to_string())
+            } else {
+              None
+            }
+          })
           .collect();
-        let write: Vec<String> = nip65_list
+        let write = nip65_list
-          .clone()
+          .iter()
-          .into_iter()
+          .filter_map(|(url, meta)| {
-          .filter(|i| matches!(&i.1, Some(y) if *y == RelayMetadata::Write))
+            if let Some(RelayMetadata::Write) = meta {
-          .map(|(url, _)| url.to_string())
+              Some(url.to_string())
+            } else {
+              None
+            }
+          })
           .collect();
-        let both: Vec<String> = nip65_list
+        let both = nip65_list
-          .into_iter()
+          .iter()
-          .filter(|i| i.1.is_none())
+          .filter_map(|(url, meta)| {
-          .map(|(url, _)| url.to_string())
+            if meta.is_none() {
+              Some(url.to_string())
+            } else {
+              None
+            }
+          })
           .collect();
 
         Ok(Relays {
@@ -79,31 +94,30 @@ pub async fn get_relays(state: State<'_, Nostr>) -> Result<Relays, String> {
 #[specta::specta]
 pub async fn connect_relay(relay: &str, state: State<'_, Nostr>) -> Result<bool, String> {
   let client = &state.client;
-  match client.add_relay(relay).await {
+  let status = client.add_relay(relay).await.map_err(|e| e.to_string())?;
-    Ok(status) => {
   if status {
-        println!("connecting to relay: {}", relay);
+    println!("Connecting to relay: {}", relay);
-        let _ = client.connect_relay(relay).await;
+    client
-        Ok(true)
+      .connect_relay(relay)
-      } else {
+      .await
-        Ok(false)
+      .map_err(|e| e.to_string())?;
-      }
-    }
-    Err(e) => Err(e.to_string()),
   }
+  Ok(status)
 }
 
 #[tauri::command]
 #[specta::specta]
 pub async fn remove_relay(relay: &str, state: State<'_, Nostr>) -> Result<bool, String> {
   let client = &state.client;
-  match client.remove_relay(relay).await {
+  client
-    Ok(_) => {
+    .remove_relay(relay)
-      let _ = client.disconnect_relay(relay).await;
+    .await
+    .map_err(|e| e.to_string())?;
+  client
+    .disconnect_relay(relay)
+    .await
+    .map_err(|e| e.to_string())?;
   Ok(true)
-    }
-    Err(e) => Err(e.to_string()),
-  }
 }
 
 #[tauri::command]
@@ -115,15 +129,12 @@ pub fn get_bootstrap_relays(app: tauri::AppHandle) -> Result<Vec<String>, String
     .map_err(|e| e.to_string())?;
 
   let file = std::fs::File::open(relays_path).map_err(|e| e.to_string())?;
-  let lines = io::BufReader::new(file).lines();
+  let reader = io::BufReader::new(file);
 
-  let mut relays = Vec::new();
+  reader
-
+    .lines()
-  for line in lines.map_while(Result::ok) {
+    .collect::<Result<Vec<String>, io::Error>>()
-    relays.push(line.to_string())
+    .map_err(|e| e.to_string())
-  }
-
-  Ok(relays)
 }
 
 #[tauri::command]
@@ -134,13 +145,10 @@ pub fn save_bootstrap_relays(relays: &str, app: tauri::AppHandle) -> Result<(),
     .resolve("resources/relays.txt", BaseDirectory::Resource)
     .map_err(|e| e.to_string())?;
 
-  let mut file = fs::OpenOptions::new()
+  let mut file = OpenOptions::new()
     .write(true)
     .open(relays_path)
     .map_err(|e| e.to_string())?;
 
-  match file.write_all(relays.as_bytes()) {
+  file.write_all(relays.as_bytes()).map_err(|e| e.to_string())
-    Ok(_) => Ok(()),
-    Err(e) => Err(e.to_string()),
-  }
 }

src-tauri/src/nostr/utils.rs

@@ -2,8 +2,8 @@ use std::collections::HashSet;
 use std::str::FromStr;
 
 use linkify::LinkFinder;
-use nostr_sdk::{Alphabet, Event, EventId, FromBech32, PublicKey, SingleLetterTag, Tag, TagKind};
 use nostr_sdk::prelude::Nip19Event;
+use nostr_sdk::{Alphabet, Event, EventId, FromBech32, PublicKey, SingleLetterTag, Tag, TagKind};
 use reqwest::Client;
 use serde::Serialize;
 use specta::Type;
@@ -47,7 +47,7 @@ const IMAGES: [&str; 7] = ["jpg", "jpeg", "gif", "png", "webp", "avif", "tiff"];
 const VIDEOS: [&str; 5] = ["mp4", "mov", "avi", "webm", "mkv"];
 
 pub fn get_latest_event(events: &[Event]) -> Option<&Event> {
-  events.iter().max_by_key(|event| event.created_at())
+  events.iter().next()
 }
 
 pub fn dedup_event(events: &[Event]) -> Vec<Event> {