Add relay view

Signed-off-by: kernelkind <kernelkind@gmail.com>
Signed-off-by: William Casarin <jb55@jb55.com>

src/relay_pool_manager.rs

@@ -0,0 +1,54 @@
+use enostr::RelayPool;
+pub use enostr::RelayStatus;
+
+/// The interface to a RelayPool for UI components.
+/// Represents all user-facing operations that can be performed for a user's relays
+pub struct RelayPoolManager<'a> {
+    pub pool: &'a mut RelayPool,
+}
+
+pub struct RelayInfo<'a> {
+    pub relay_url: &'a str,
+    pub status: &'a RelayStatus,
+}
+
+impl<'a> RelayPoolManager<'a> {
+    pub fn new(pool: &'a mut RelayPool) -> Self {
+        RelayPoolManager { pool }
+    }
+
+    pub fn get_relay_infos(&self) -> Vec<RelayInfo> {
+        self.pool
+            .relays
+            .iter()
+            .map(|relay| RelayInfo {
+                relay_url: &relay.relay.url,
+                status: &relay.relay.status,
+            })
+            .collect()
+    }
+
+    /// index of the Vec<RelayInfo> from get_relay_infos
+    pub fn remove_relay(&mut self, index: usize) {
+        if index < self.pool.relays.len() {
+            self.pool.relays.remove(index);
+        }
+    }
+
+    /// removes all specified relay indicies shown in get_relay_infos
+    pub fn remove_relays(&mut self, mut indices: Vec<usize>) {
+        indices.sort_unstable_by(|a, b| b.cmp(a));
+        indices.iter().for_each(|index| self.remove_relay(*index));
+    }
+
+    pub fn add_relay(&mut self, ctx: &egui::Context, relay_url: String) {
+        let _ = self.pool.add_url(relay_url, create_wakeup(ctx));
+    }
+}
+
+fn create_wakeup(ctx: &egui::Context) -> impl Fn() + Send + Sync + Clone + 'static {
+    let ctx = ctx.clone();
+    move || {
+        ctx.request_repaint();
+    }
+}