GH-140 Bump run server version to 1.21.4 and add old legacy hex color transformers (#144)

* Bump run server version to 1.21.4 and add old legacy hex color transformers

* Add test for legacy hex formatting

Author: CitralFlo

build.gradle.kts

@@ -85,7 +85,7 @@ runPaper {
 }
 
 tasks.runServer {
-    minecraftVersion("1.20.4")
+    minecraftVersion("1.21.4")
     dependsOn("shadowAll")
     pluginJars = files("/build/libs/ChatFormatter v${project.version}.jar")
 }

chatformatter-core/src/main/java/com/eternalcode/formatter/legacy/Legacy.java

@@ -19,6 +19,7 @@ public final class Legacy {
     public static final Pattern AMPERSAND_PATTERN = Pattern.compile("(?i)" + AMPERSAND + "([0-9A-FK-ORX#])");
     public static final Pattern SHADOW_PATTERN = Pattern.compile("(?i)" + SHADOW + "[0-9A-FK-ORX#]");
     public static final Pattern HEX_PATTERN = Pattern.compile("(?i)" + AMPERSAND + "#([0-9A-F]{6})");
+    public static final Pattern HEX_COLOR_PATTERN = Pattern.compile("(?i)&x(&[0-9A-F]){6}");
 
     public static final Map<String, String> codeTranslations = new ImmutableMap.Builder<String, String>()
             .put("0", "<black>")
@@ -96,7 +97,12 @@ static String placeholderToAmpersand(String text) {
     }
 
     public static String legacyToAdventure(String input) {
-        String result = HEX_PATTERN.matcher(input).replaceAll(matchResult -> {
+        String result = HEX_COLOR_PATTERN.matcher(input).replaceAll(matchResult -> {
+            String hexColor = matchResult.group().replace("&x", "").replace("&", "");
+            return "<#" + hexColor + ">";
+        });
+
+        result = HEX_PATTERN.matcher(result).replaceAll(matchResult -> {
             String hex = matchResult.group(1);
             return "<#" + hex + ">";
         });

chatformatter-core/src/test/java/com/eternalcode/formatter/legacy/LegacyTest.java

@@ -50,4 +50,14 @@ void testLegacyToAdventure() {
         assertEquals("<red> SIEMA <#8376d3> <reset>test<green>!", result);
     }
 
+    @Test
+    @DisplayName("Conversion of legacy hex formatting used in plugins like HexNicks default format")
+    void testLegacyHexToAdventure() {
+        String input = "&x&c&c&d&d&7&7&lSIEMA &x&7&7&5&5&4&4test&a!";
+
+        String result = Legacy.legacyToAdventure(input);
+
+        assertEquals("<#ccdd77><bold>SIEMA <#775544>test<green>!", result);
+    }
+
 }