Create PlaceholderApiExtension

NookureStaff-Paper/src/main/java/com/nookure/staff/paper/placeholder/PlaceholderApiExtension.java

@@ -0,0 +1,57 @@
+package com.nookure.staff.paper.placeholder;
+
+import com.google.inject.Inject;
+import com.google.inject.Injector;
+import com.nookure.staff.Constants;
+import com.nookure.staff.api.placeholder.Placeholder;
+import com.nookure.staff.api.placeholder.PlaceholderManager;
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Optional;
+import java.util.stream.Stream;
+
+public class PlaceholderApiExtension extends PlaceholderExpansion {
+  @Inject
+  private PlaceholderManager placeholderManager;
+  @Inject
+  private Injector in;
+  public static final String IDENTIFIER = "nkstaff";
+
+  @Override
+  public @NotNull String getIdentifier() {
+    return IDENTIFIER;
+  }
+
+  @Override
+  public @NotNull String getAuthor() {
+    return "Angelillo15";
+  }
+
+  @Override
+  public @NotNull String getVersion() {
+    return Constants.VERSION;
+  }
+
+  @Override
+  public boolean register() {
+    Stream.of(
+        ServerCountPlaceholder.class,
+        StaffCountPlaceholder.class,
+        StaffModePlaceholder.class,
+        VanishPlaceholder.class
+    ).forEach(p -> placeholderManager.registerPlaceholder(in.getInstance(p)));
+
+    return super.register();
+  }
+
+  @Override
+  public String onPlaceholderRequest(Player player, @NotNull String params) {
+    Optional<Placeholder> placeholder = placeholderManager.getPlaceholder(params);
+
+    if (placeholder.isEmpty()) return "Not found";
+
+    return placeholder.get().onPlaceholderRequest(player, params);
+  }
+}