Add Generator command to generate emoji lookup table

resources/scripts/Generator/Models/Emoji.cs

@@ -0,0 +1,70 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using AngleSharp.Dom;
+using AngleSharp.Html.Dom;
+
+namespace Generator.Models
+{
+    public class Emoji
+    {
+        private static readonly string[] _headers = { "count", "code", "sample", "name" };
+
+        private Emoji(string code, string name)
+        {
+            Code = code;
+            Name = name;
+        }
+
+        public string Code { get; }
+
+        public string Name { get; }
+
+        public static IEnumerable<Emoji> Parse(IHtmlDocument document)
+        {
+            var rows = document
+                .GetNodes<IHtmlTableRowElement>(predicate: row =>
+                    row.Cells.Length >= _headers.Length && // Filter out rows that don't have enough cells.
+                    row.Cells.All(x => x.LocalName == TagNames.Td)); // We're only interested in td cells, not th.
+
+            foreach (var row in rows)
+            {
+                var dictionary = _headers
+                    .Zip(row.Cells, (header, cell) => (header, cell.TextContent.Trim()))
+                    .ToDictionary(x => x.Item1, x => x.Item2);
+
+                var code = TransformCode(dictionary["code"]);
+                var name = TransformName(dictionary["name"]);
+
+                yield return new Emoji(code, name);
+            }
+        }
+
+        private static string TransformName(string name)
+        {
+            return name.Replace(":", string.Empty)
+                .Replace(",", string.Empty)
+                .Replace(".", string.Empty)
+                .Replace("\u201c", string.Empty)
+                .Replace("\u201d", string.Empty)
+                .Replace("\u229b", string.Empty)
+                .Trim()
+                .Replace(' ', '_')
+                .ToLowerInvariant();
+        }
+
+        private static string TransformCode(string code)
+        {
+            var builder = new StringBuilder();
+
+            foreach (var part in code.Split(' '))
+            {
+                builder.Append(part.Length == 6
+                    ? part.Replace("+", "0000")
+                    : part.Replace("+", "000"));
+            }
+
+            return builder.ToString().Replace("U", "\\U");
+        }
+    }
+}