[Feature / Cleanup] Sign rework (WIP)

Movecraft/src/main/java/net/countercraft/movecraft/listener/SignListener.java

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+package net.countercraft.movecraft.listener;public class SignListener {
+}

api/src/main/java/net/countercraft/movecraft/sign/AbstractCraftSign.java

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+package net.countercraft.movecraft.sign;public class AbstractCraftSign {
+}

api/src/main/java/net/countercraft/movecraft/sign/AbstractMovecraftSign.java

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+package net.countercraft.movecraft.sign;
+
+import net.countercraft.movecraft.craft.Craft;
+import net.countercraft.movecraft.util.MathUtils;
+import org.bukkit.block.Sign;
+import org.bukkit.entity.Player;
+import org.bukkit.event.block.Action;
+import org.bukkit.event.block.SignChangeEvent;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+
+public abstract class AbstractMovecraftSign {
+
+    private static final Map<String, AbstractMovecraftSign> SIGNS = Collections.synchronizedMap(new HashMap<>());
+
+    public static boolean hasBeenRegistered(final String ident) {
+        return SIGNS.containsKey(ident);
+    }
+
+    public static Optional<AbstractMovecraftSign> tryGet(final String ident) {
+        String identToUse = ident.toUpperCase();
+        if (identToUse.indexOf(":") >= 0) {
+            identToUse = identToUse.split(":")[0];
+        }
+        return Optional.ofNullable(SIGNS.getOrDefault(identToUse, null));
+    }
+
+    public static void forceRegister(final String ident, final @Nonnull AbstractMovecraftSign instance) {
+        register(ident, instance, true);
+    }
+
+    public static void register(final String ident, final @Nonnull AbstractMovecraftSign instance, boolean allowOverride) {
+        if (allowOverride) {
+            SIGNS.put(ident.toUpperCase(), instance);
+        } else {
+            SIGNS.putIfAbsent(ident.toUpperCase(), instance);
+        }
+    }
+
+    protected final Optional<String> optPermission;
+
+    public AbstractMovecraftSign() {
+        this(null);
+    }
+
+    public AbstractMovecraftSign(String permissionNode) {
+        this.optPermission = Optional.ofNullable(permissionNode);
+    }
+
+    // Return true to cancel the event
+    public boolean processSignClick(Action clickType, Sign sign, Player player) {
+        if (!this.isSignValid(clickType, sign, player)) {
+            return false;
+        }
+        if (!this.canPlayerUseSign(clickType, sign, player)) {
+            return false;
+        }
+
+        return internalProcessSign(clickType, sign, player, getCraft(sign));
+    }
+
+    protected boolean canPlayerUseSign(Action clickType, Sign sign, Player player) {
+        if (this.optPermission.isPresent()) {
+            return player.hasPermission(this.optPermission.get());
+        }
+        return true;
+    }
+
+    protected Optional<Craft> getCraft(Sign sign) {
+        return Optional.ofNullable(MathUtils.getCraftByPersistentBlockData(sign.getLocation()));
+    }
+
+    public abstract boolean shouldCancelEvent(boolean processingSuccessful, @Nullable Action type, boolean sneaking);
+    protected abstract boolean isSignValid(Action clickType, Sign sign, Player player);
+    protected abstract boolean internalProcessSign(Action clickType, Sign sign, Player player, Optional<Craft> craft);
+    public abstract boolean processSignChange(SignChangeEvent event);
+
+}