- .say now uses new SmartText instead of CREmbed

- Added IMessageChannel extensions for sending smarttext
- Added implicit operator from string to smarttext (which just creates smartplaintext instance)

src/NadekoBot/Common/Replacements/Replacer.cs

@@ -34,6 +34,58 @@ namespace NadekoBot.Common.Replacements
             return input;
         }
 
+        public SmartText Replace(SmartText data)
+            => data switch
+            {
+                SmartEmbedText embedData => Replace(embedData),
+                SmartPlainText plain => Replace(plain),
+                _ => throw new ArgumentOutOfRangeException(nameof(data), "Unsupported argument type")
+            };
+
+        public SmartPlainText Replace(SmartPlainText plainText)
+            => Replace(plainText.Text);
+
+        public SmartEmbedText Replace(SmartEmbedText embedData)
+        {
+            var newEmbedData = new SmartEmbedText();
+            newEmbedData.PlainText = Replace(embedData.PlainText);
+            newEmbedData.Description = Replace(embedData.Description);
+            newEmbedData.Title = Replace(embedData.Title);
+            newEmbedData.Thumbnail = Replace(embedData.Thumbnail);
+            newEmbedData.Image = Replace(embedData.Image);
+            if (embedData.Author != null)
+            {
+                newEmbedData.Author = new SmartTextEmbedAuthor();
+                newEmbedData.Author.Name = Replace(embedData.Author.Name);
+                newEmbedData.Author.IconUrl = Replace(embedData.Author.IconUrl);
+            }
+
+            if (embedData.Fields != null)
+            {
+                var fields = new List<SmartTextEmbedField>();
+                foreach (var f in embedData.Fields)
+                {
+                    var newF = new SmartTextEmbedField();
+                    newF.Name = Replace(f.Name);
+                    newF.Value = Replace(f.Value);
+                    fields.Add(newF);
+                }
+
+                newEmbedData.Fields = fields.ToArray();
+            }
+
+            if (embedData.Footer != null)
+            {
+                newEmbedData.Footer = new SmartTextEmbedFooter();
+                newEmbedData.Footer.Text = Replace(embedData.Footer.Text);
+                newEmbedData.Footer.IconUrl = Replace(embedData.Footer.IconUrl);
+            }
+
+            newEmbedData.Color = embedData.Color;
+
+            return newEmbedData;
+        }
+
         public CREmbed Replace(CREmbed embedData)
         {
             embedData.PlainText = Replace(embedData.PlainText);

src/NadekoBot/Common/SmartText/SmartText.cs

@@ -2,15 +2,17 @@
 
 namespace NadekoBot
 {
-    // todo 3.3 check if saving embeds in db has IsEmbed field, to prevent rechecking and generating exceptions on every use
     public abstract class SmartText
     {
         public bool IsEmbed => this is SmartEmbedText;
         public bool IsPlainText => this is SmartPlainText;
 
+        public static implicit operator SmartText(string input)
+            => new SmartPlainText(input);
+        
         public static SmartText CreateFrom(string input)
         {
-            if (string.IsNullOrWhiteSpace(input) || !input.Trim().StartsWith("{"))
+            if (string.IsNullOrWhiteSpace(input) || !input.TrimStart().StartsWith("{"))
             {
                 return new SmartPlainText(input);
             }

src/NadekoBot/Common/TypeReaders/KwumTypeReader.cs

@@ -13,4 +13,12 @@ namespace NadekoBot.Common.TypeReaders
             return Task.FromResult(TypeReaderResult.FromError(CommandError.ParseFailed, "Input is not a valid kwum"));
         }
     }
+
+    public sealed class SmartTextTypeReader : NadekoTypeReader<SmartText>
+    {
+        public override Task<TypeReaderResult> ReadAsync(ICommandContext ctx, string input)
+        {
+            return Task.FromResult(TypeReaderResult.FromSuccess(SmartText.CreateFrom(input)));
+        }
+    }
 }