Fixes compatibility for pre-1.20 spigot

src/main/java/net/knarcraft/stargate/utility/SignHelper.java

@@ -0,0 +1,67 @@
+package net.knarcraft.stargate.utility;
+
+import org.bukkit.DyeColor;
+import org.bukkit.block.Sign;
+import org.bukkit.block.sign.Side;
+
+/**
+ * A helper class for dealing with signs
+ */
+public final class SignHelper {
+
+    private static final boolean HAS_SIGN_SIDES = hasSignSides();
+
+    private SignHelper() {
+
+    }
+
+    /**
+     * Gets the dye color of the given sign
+     *
+     * @param sign <p>The sign to check</p>
+     * @return <p>The dye currently applied to the sign</p>
+     */
+    public static DyeColor getDye(Sign sign) {
+        if (HAS_SIGN_SIDES) {
+            return sign.getSide(Side.FRONT).getColor();
+        } else {
+            // Note: This is depreciated, but is currently necessary for pre-1.19.4 support
+            //noinspection deprecation
+            return sign.getColor();
+        }
+    }
+
+    /**
+     * Sets the text of a line on a sign
+     *
+     * @param sign <p>The sign to set text for</p>
+     * @param line <p>The line to set</p>
+     * @param text <p>The text to set</p>
+     */
+    public static void setSignLine(Sign sign, int line, String text) {
+        if (HAS_SIGN_SIDES) {
+            sign.getSide(Side.FRONT).setLine(line, text);
+        } else {
+            // Note: This is depreciated, but is currently necessary for pre-1.19.4 support
+            //noinspection deprecation
+            sign.setLine(line, text);
+        }
+    }
+
+    /**
+     * Checks whether the running version differentiates between the front or back of a sign
+     *
+     * @return <p>True if the server supports sign side differentiation</p>
+     */
+    private static boolean hasSignSides() {
+        try {
+            Class.forName("Side");
+            Class<?> aClass = Class.forName("org.bukkit.block.Sign");
+            aClass.getMethod("getSide", Side.class);
+            return true;
+        } catch (ClassNotFoundException | NoSuchMethodException ignored) {
+            return false;
+        }
+    }
+
+}