Multi-Sided Sign Support

paper/src/main/java/com/denizenscript/denizen/paper/PaperModule.java

@@ -20,6 +20,9 @@
 import net.md_5.bungee.api.ChatColor;
 import org.bukkit.Bukkit;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class PaperModule {
 
     public static void init() {
@@ -165,6 +168,14 @@ public static String stringifyComponent(Component component) {
         return FormattedTextHelper.stringify(FormattedTextHelper.parseJson(componentToJson(component)));
     }
 
+    public static List<String> stringifyComponentList(List<Component> components) {
+        List<String> values = new ArrayList<>(components.size());
+        for (Component component : components) {
+            values.add(stringifyComponent(component));
+        }
+        return values;
+    }
+
     public static Component jsonToComponent(String json) {
         if (json == null) {
             return null;

paper/src/main/java/com/denizenscript/denizen/paper/utilities/PaperAPIToolsImpl.java

@@ -28,6 +28,7 @@
 import net.md_5.bungee.api.chat.BaseComponent;
 import org.bukkit.*;
 import org.bukkit.block.Sign;
+import org.bukkit.block.sign.Side;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.*;
 import org.bukkit.event.entity.CreatureSpawnEvent;
@@ -101,18 +102,28 @@ public String getPlayerListName(Player player) {
     }
 
     @Override
-    public String[] getSignLines(Sign sign) {
-        String[] output = new String[4];
-        int i = 0;
-        for (Component component : sign.lines()) {
-            output[i++] = PaperModule.stringifyComponent(component);
-        }
-        return output;
+    public List<String> getSignLines(Sign sign) {
+        return PaperModule.stringifyComponentList(NMSHandler.getVersion().isAtLeast(NMSVersion.v1_20) ? sign.getSide(Side.FRONT).lines() : sign.lines());
+    }
+
+    @Override
+    public List<String> getBackSignLines(Sign sign) {
+        return PaperModule.stringifyComponentList(sign.getSide(Side.BACK).lines());
     }
 
     @Override
     public void setSignLine(Sign sign, int line, String text) {
-        sign.line(line, PaperModule.parseFormattedText(text == null ? "" : text, ChatColor.BLACK));
+        if (NMSHandler.getVersion().isAtLeast(NMSVersion.v1_20)) {
+            sign.getSide(Side.FRONT).line(line, PaperModule.parseFormattedText(text == null ? "" : text, ChatColor.BLACK));
+        }
+        else {
+            sign.line(line, PaperModule.parseFormattedText(text == null ? "" : text, ChatColor.BLACK));
+        }
+    }
+
+    @Override
+    public void setBackSignLine(Sign sign, int line, String text) {
+        sign.getSide(Side.BACK).line(line, PaperModule.parseFormattedText(text == null ? "" : text, ChatColor.BLACK));
     }
 
     @Override