feat: improve channel deletion logic

backend/server.js

@@ -62,8 +62,9 @@ app.use('/proxy', proxyRouter);
 const PORT = 5000;
 const server = app.listen(PORT, async () => {
   console.log(`Server listening on Port ${PORT}`);
-  if (ChannelService.getCurrentChannel().restream()) {
-    await streamController.start(ChannelService.getCurrentChannel());
+  const currentChannel = ChannelService.getCurrentChannel();
+  if (currentChannel && currentChannel.restream()) {
+    await streamController.start(currentChannel);
   }
   PlaylistUpdater.startScheduler();
   PlaylistUpdater.registerChannelsPlaylist(ChannelService.getChannels());

backend/services/ChannelService.js

@@ -88,10 +88,17 @@ class ChannelService {
             throw new Error('Channel does not exist');
         }
 
+        // Prevent deleting the last channel
+        if (this.channels.length === 1) {
+            throw new Error('Cannot delete the last channel');
+        }
+
         const [deletedChannel] = this.channels.splice(channelIndex, 1);
 
+        // If we deleted the current channel, switch to another one
         if (this.currentChannel.id === id) {
-            await this.setCurrentChannel(0);
+            const nextChannel = this.channels[0];
+            await this.setCurrentChannel(nextChannel.id);
         }
 
         if(save) ChannelStorage.save(this.channels);

frontend/src/components/add_channel/ChannelModal.tsx

@@ -155,17 +155,17 @@ function ChannelModal({ onClose, channel }: ChannelModalProps) {
 
   const handleDelete = () => {
     if (channel) {
+      addToast({
+        type: "error",
+        title: `Deleting ${type}`,
+        duration: 3000,
+      });
       if (type === 'channel') {
         socketService.deleteChannel(channel.id);
       } else if (type === 'playlist') {
         socketService.deletePlaylist(channel.playlist);
       }
     }
-    addToast({
-      type: 'error',
-      title: `${type} deleted`,
-      duration: 3000,
-    });
     onClose();
   };