Clarified .feedadd errors

src/NadekoBot/Modules/Searches/Feeds/FeedCommands.cs

@@ -32,33 +32,43 @@ public partial class Searches
         [UserPerm(GuildPerm.ManageMessages)]
         public async Task Feed(string url, [Leftover] ITextChannel channel = null)
         {
-            var success = Uri.TryCreate(url, UriKind.Absolute, out var uri)
-                          && (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps);
-            if (success)
+            if (Uri.TryCreate(url, UriKind.Absolute, out var uri)
+                && (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps))
             {
-                channel ??= (ITextChannel)ctx.Channel;
-                try
-                {
-                    await FeedReader.ReadAsync(url);
-                }
-                catch (Exception ex)
-                {
-                    Log.Information(ex, "Unable to get feeds from that url");
-                    success = false;
-                }
+                await ReplyErrorLocalizedAsync(strs.feed_invalid_url);
+                return;
             }
 
-            if (success)
+            channel ??= (ITextChannel)ctx.Channel;
+            try
             {
-                success = _service.AddFeed(ctx.Guild.Id, channel.Id, url);
-                if (success)
-                {
-                    await ReplyConfirmLocalizedAsync(strs.feed_added);
-                    return;
-                }
+                await FeedReader.ReadAsync(url);
+            }
+            catch (Exception ex)
+            {
+                Log.Information(ex, "Unable to get feeds from that url");
+                await ReplyErrorLocalizedAsync(strs.feed_cant_parse);
+                return;
             }
 
-            await ReplyConfirmLocalizedAsync(strs.feed_not_valid);
+            var result = _service.AddFeed(ctx.Guild.Id, channel.Id, url);
+            if (result == FeedAddResult.Success)
+            {
+                await ReplyConfirmLocalizedAsync(strs.feed_added);
+                return;
+            }
+
+            if (result == FeedAddResult.Duplicate)
+            {
+                await ReplyErrorLocalizedAsync(strs.feed_duplicate);
+                return;
+            }
+
+            if (result == FeedAddResult.LimitReached)
+            {
+                await ReplyErrorLocalizedAsync(strs.feed_limit_reached);
+                return;
+            }
         }
 
         [Cmd]

src/NadekoBot/Modules/Searches/Feeds/FeedsService.cs

@@ -207,7 +207,7 @@ public class FeedsService : INService
                   .ToList();
     }
 
-    public bool AddFeed(ulong guildId, ulong channelId, string rssFeed)
+    public FeedAddResult AddFeed(ulong guildId, ulong channelId, string rssFeed)
     {
         ArgumentNullException.ThrowIfNull(rssFeed, nameof(rssFeed));
 
@@ -221,9 +221,9 @@ public class FeedsService : INService
         var gc = uow.GuildConfigsForId(guildId, set => set.Include(x => x.FeedSubs));
 
         if (gc.FeedSubs.Any(x => x.Url.ToLower() == fs.Url.ToLower()))
-            return false;
+            return FeedAddResult.Duplicate;
         if (gc.FeedSubs.Count >= 10)
-            return false;
+            return FeedAddResult.LimitReached;
 
         gc.FeedSubs.Add(fs);
         uow.SaveChanges();
@@ -242,7 +242,7 @@ public class FeedsService : INService
                 });
         }
 
-        return true;
+        return FeedAddResult.Success;
     }
 
     public bool RemoveFeed(ulong guildId, int index)
@@ -271,3 +271,11 @@ public class FeedsService : INService
         return true;
     }
 }
+
+public enum FeedAddResult
+{
+    Success,
+    LimitReached,
+    Invalid,
+    Duplicate,
+}

src/NadekoBot/data/strings/responses/responses.en-US.json

@@ -885,7 +885,10 @@
   "started": "Started. Reposting every {0}s.",
   "stopped": "Stopped reposting.",
   "feed_added": "Feed added.",
-  "feed_not_valid": "Invalid link, or you're already following that feed on this server, or you've reached maximum number of feeds allowed.",
+  "feed_limit_reached": "You've reached the maximum number of feeds allowed per server.",
+  "feed_duplicate": "You're already following that feed on this server.",
+  "feed_cant_parse": "Unable to access or parse that feed url's contents.",
+  "feed_invalid_url": "Invalid feed url. It must be an absolute http or https url.",
   "feed_out_of_range": "Index out of range.",
   "feed_removed": "Feed removed.",
   "feed_no_feed": "You haven't subscribed to any feeds on this server.",