feat: Introduce CompatibleCrop class

At least EpicFarming and EpicAutomators can make good
use of this class and get rid of code that relies on
magic numbers and needs cross-version support.

Compatibility/src/main/java/com/craftaro/core/compatibility/crops/CompatibleCrop.java

@@ -0,0 +1,85 @@
+package com.craftaro.core.compatibility.crops;
+
+import com.craftaro.core.compatibility.CompatibleMaterial;
+import com.cryptomorin.xseries.XBlock;
+import com.cryptomorin.xseries.XMaterial;
+import org.bukkit.block.Block;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class CompatibleCrop {
+    private static final boolean USE_LEGACY_IMPLEMENTATION;
+
+    static {
+        boolean useLegacy = false;
+        try {
+            Class.forName("org.bukkit.block.data.Ageable");
+        } catch (ClassNotFoundException ignore) {
+            useLegacy = true;
+        }
+        USE_LEGACY_IMPLEMENTATION = useLegacy;
+    }
+
+    public static boolean isCrop(@Nullable Block block) {
+        if (block == null) {
+            return false;
+        }
+
+        XMaterial material = CompatibleMaterial.getMaterial(block.getType()).get();
+        return isCrop(material);
+    }
+
+    public static boolean isCrop(@Nullable XMaterial material) {
+        return material != null && XBlock.isCrop(material);
+    }
+
+    public static boolean isCropFullyGrown(@NotNull Block crop) {
+        return getCropAge(crop) >= getCropMaxAge(crop);
+    }
+
+    public static int getCropAge(@NotNull Block crop) {
+        if (!USE_LEGACY_IMPLEMENTATION) {
+            return CompatibleCropModern.getCropAge(crop);
+        }
+        return crop.getData();
+    }
+
+    public static int getCropMaxAge(@NotNull Block crop) {
+        if (!USE_LEGACY_IMPLEMENTATION) {
+            return CompatibleCropModern.getCropMaxAge(crop);
+        }
+
+        switch (CompatibleMaterial.getMaterial(crop.getType()).get()) {
+            case BEETROOTS:
+            case NETHER_WART:
+                return 3;
+            default:
+                return 7;
+        }
+    }
+
+    public static void resetCropAge(@NotNull Block crop) {
+        setCropAge(crop, 0);
+    }
+
+    public static void incrementCropAge(@NotNull Block crop) {
+        setCropAge(crop, getCropAge(crop) + 1);
+    }
+
+    private static void setCropAge(Block block, int stage) {
+        if (stage > getCropMaxAge(block)) {
+            return;
+        }
+
+        if (!USE_LEGACY_IMPLEMENTATION) {
+            CompatibleCropModern.setGrowthStage(block, stage);
+            return;
+        }
+
+        try {
+            Block.class.getDeclaredMethod("setData", byte.class).invoke(block, (byte) stage);
+        } catch (ReflectiveOperationException ex) {
+            throw new RuntimeException(ex);
+        }
+    }
+}

Compatibility/src/main/java/com/craftaro/core/compatibility/crops/CompatibleCropModern.java

@@ -0,0 +1,23 @@
+package com.craftaro.core.compatibility.crops;
+
+import org.bukkit.block.Block;
+import org.bukkit.block.data.Ageable;
+import org.bukkit.block.data.BlockData;
+
+class CompatibleCropModern {
+    static int getCropAge(Block block) {
+        BlockData blockData = block.getBlockData();
+        return ((Ageable) blockData).getAge();
+    }
+
+    static int getCropMaxAge(Block block) {
+        BlockData blockData = block.getBlockData();
+        return ((Ageable) blockData).getMaximumAge();
+    }
+
+    static void setGrowthStage(Block block, int stage) {
+        Ageable blockData = (Ageable) block.getBlockData();
+        blockData.setAge(stage);
+        block.setBlockData(blockData);
+    }
+}