feat: support 1.21.4+ shadowColor in component parser

Closes #470

Author: diogotcorreia

Diff for: core/src/main/java/com/rexcantor64/triton/language/parser/AdvancedComponent.java

@@ -7,7 +7,9 @@
 import lombok.val;
 import net.md_5.bungee.api.ChatColor;
 import net.md_5.bungee.api.chat.*;
+import net.md_5.bungee.api.chat.TextComponent;
 
+import java.awt.*;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -48,6 +50,16 @@ public static AdvancedComponent fromBaseComponent(boolean onlyText, BaseComponen
             boolean hasHover = false;
             boolean hasFont = false;
             builder.append(ComponentUtils.getColorFromBaseComponent(comp).toString());
+            try {
+                Color shadowColor = comp.getShadowColor();
+                if (shadowColor != null) {
+                    // getRGB also includes alpha information
+                    builder.append("§s");
+                    builder.append(String.format("%08x", shadowColor.getRGB()));
+                }
+            } catch (NoSuchMethodError ignore) {
+                // old versions of Spigot don't have getShadowColor()
+            }
             if (comp.isBold())
                 builder.append(ChatColor.BOLD.toString());
             if (comp.isItalic())
@@ -159,6 +171,11 @@ private List<BaseComponent> toBaseComponent(String text) {
                     val color = text.substring(i + 1, i + 13);
                     format = ChatColor.of("#" + color.replace("\u00A7", ""));
                     i += 12;
+                } else if (lowercaseChar == 's' && i + 8 < text.length()) {
+                    val color = text.substring(i + 1, i + 9);
+                    component.setShadowColor(new Color(Integer.parseUnsignedInt(color, 16), true));
+                    i += 8;
+                    continue;
                 } else {
                     format = ChatColor.getByChar(lowercaseChar);
                 }

Diff for: core/src/main/java/com/rexcantor64/triton/utils/ComponentUtils.java

@@ -73,6 +73,11 @@ public static void copyFormatting(BaseComponent origin, BaseComponent target) {
         } catch (NoSuchMethodError ignore) {
             // Ignore, it's an outdated server
         }
+        try {
+            target.setShadowColor(origin.getShadowColorRaw());
+        } catch (NoSuchMethodError ignore) {
+            // Ignore, it's an outdated server
+        }
     }
 
     public static ChatColor getColorFromBaseComponent(BaseComponent bc) {
@@ -100,6 +105,12 @@ public static boolean haveSameFormatting(BaseComponent c1, BaseComponent c2) {
         } catch (NoSuchMethodError ignore) {
             // Ignore, it's an outdated server
         }
+        try {
+            if (!Objects.equals(c1.getShadowColorRaw(), c2.getShadowColorRaw()))
+                return false;
+        } catch (NoSuchMethodError ignore) {
+            // Ignore, it's an outdated server
+        }
         return c1.getColorRaw() == c2.getColorRaw() &&
                 c1.isBoldRaw() == c2.isBoldRaw() &&
                 c1.isItalicRaw() == c2.isItalicRaw() &&

Diff for: core/src/test/java/com/rexcantor64/triton/language/parser/AdvancedComponentTest.java

@@ -8,6 +8,8 @@
 import net.md_5.bungee.chat.ComponentSerializer;
 import org.junit.jupiter.api.Test;
 
+import java.awt.*;
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 public class AdvancedComponentTest {
@@ -33,4 +35,26 @@ public void testColorCodeBetweenClickEvent() {
         String expectedResultJson = "{\"extra\":[{\"strikethrough\":true,\"color\":\"gray\",\"hoverEvent\":{\"action\":\"show_text\",\"contents\":\"\"},\"extra\":[{\"text\":\"Testing\"}],\"text\":\"\"},{\"color\":\"gray\",\"hoverEvent\":{\"action\":\"show_text\",\"contents\":\"\"},\"extra\":[{\"text\":\"another test\"}],\"text\":\"\"}],\"text\":\"\"}";
         assertEquals(expectedResultJson, ComponentSerializer.toString(components));
     }
+
+    @Test
+    public void testShadowColor() {
+        BaseComponent root = new TextComponent();
+        BaseComponent child1 = new TextComponent("Testing");
+        child1.setColor(ChatColor.GRAY);
+        child1.setStrikethrough(true);
+        child1.setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new Text("")));
+        root.addExtra(child1);
+        BaseComponent child2 = new TextComponent("another test");
+        child2.setColor(ChatColor.GRAY);
+        child2.setShadowColor(new Color(0x33, 0x44, 0x55, 0x88));
+        root.addExtra(child2);
+
+        AdvancedComponent advancedComponent = AdvancedComponent.fromBaseComponent(root);
+        advancedComponent.setText(advancedComponent.getTextClean());
+
+        BaseComponent[] components = advancedComponent.toBaseComponent();
+
+        String expectedResultJson = "{\"extra\":[{\"strikethrough\":true,\"color\":\"gray\",\"hoverEvent\":{\"action\":\"show_text\",\"contents\":\"\"},\"extra\":[{\"text\":\"Testing\"}],\"text\":\"\"},{\"color\":\"gray\",\"shadow_color\":-2009906091,\"text\":\"another test\"}],\"text\":\"\"}";
+        assertEquals(expectedResultJson, ComponentSerializer.toString(components));
+    }
 }