feat: chunk large subcodexes on words

Author: DominicEliot

Elementalist/DiscordUi/CodexUi.cs

@@ -1,7 +1,10 @@
 using System.Data;
+using System.Text;
 using System.Text.RegularExpressions;
 using Elementalist.Models;
+using Elementalist.Shared;
 using ElementalistBot.Infrastructure.DataAccess.Rules;
+using NetCord;
 using NetCord.Rest;
 using NetCord.Services.ApplicationCommands;
 
@@ -66,7 +69,16 @@ private static EmbedProperties CreateCodexRuleEmbed(CodexEntry rule)
 
         foreach (var subCodex in rule.Subcodexes)
         {
-            codexEmbed.AddFields(new EmbedFieldProperties().WithName(subCodex.Title).WithValue(subCodex.Content));
+            var continued = string.Empty;
+            foreach (var fieldContentChunk in subCodex.Content.ChunkStringOnWords(1024)) //discord's max field length
+            {
+                codexEmbed.AddFields(new EmbedFieldProperties()
+                    .WithName(subCodex.Title + continued)
+                    .WithValue(new string(fieldContentChunk))
+                );
+
+                continued = " - continued";
+            }
         }
 
         return codexEmbed;

Elementalist/Shared/StringChunker.cs

@@ -0,0 +1,30 @@
+using System.Text;
+
+namespace Elementalist.Shared;
+
+public static class StringChunker
+{
+    public static IEnumerable<string> ChunkStringOnWords(this string value, int maxLength)
+    {
+        var words =  value.Split([' ']);
+        var sb = new StringBuilder();
+        int currentLength = 0;
+
+        foreach (var word in words)
+        {
+            if (currentLength + word.Length < maxLength)
+            {
+                sb.Append(word).Append(' ');
+                currentLength += word.Length + 1;
+                continue;
+            }
+
+            var wordChunk = sb.ToString().Trim();
+            sb = new StringBuilder();
+            sb.Append(word).Append(' ');
+            currentLength = word.Length + 1;
+
+            yield return wordChunk;
+        }
+    }
+}

ElementalistTests/Shared/StringChunkerTests.cs

@@ -0,0 +1,17 @@
+using Elementalist.Shared;
+using Xunit;
+
+namespace ElementalistTests.Shared;
+
+public class StringChunkerTests
+{
+    [Fact]
+    public void ChunkStringOnWords()
+    {
+        var testSentence = "The quick brown fox jumped over the lazy dog.";
+        var chunked = testSentence.ChunkStringOnWords(12);
+
+        Assert.True(chunked.All(chunk => chunk.Length <= 12));
+        Assert.Equal("brown fox", chunked.ElementAt(1));
+    }
+}