#512: Expand Strider and Steerable entity API

By: Parker Hawke <hawkeboyz2@hotmail.com>

paper-api/src/main/java/org/bukkit/entity/Steerable.java

@@ -0,0 +1,71 @@
+package org.bukkit.entity;
+
+import org.bukkit.Material;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Represents an entity which may be saddled, ridden and steered using an item.
+ */
+public interface Steerable extends Animals {
+
+    /**
+     * Check if the pig has a saddle.
+     *
+     * @return if the pig has been saddled.
+     */
+    public boolean hasSaddle();
+
+    /**
+     * Sets if the pig has a saddle or not
+     *
+     * @param saddled set if the pig has a saddle or not.
+     */
+    public void setSaddle(boolean saddled);
+
+    /**
+     * Get the time in ticks this entity's movement is being increased.
+     *
+     * Movement speed is often increased as a result of using the
+     * {@link #getSteerMaterial()}.
+     *
+     * @return the current boost ticks
+     */
+    public int getBoostTicks();
+
+    /**
+     * Set the time in ticks this entity's movement will be increased.
+     *
+     * This will reset the current boost ticks to 0
+     * ({@link #getCurrentBoostTicks()}).
+     *
+     * @param ticks the boost time
+     */
+    public void setBoostTicks(int ticks);
+
+    /**
+     * Get the time in ticks this entity's movement has been increased as of the
+     * most recent boost.
+     *
+     * Current boost ticks will never be {@literal >} {@link #getBoostTicks()}.
+     *
+     * @return the current boost ticks
+     */
+    public int getCurrentBoostTicks();
+
+    /**
+     * Set the time in ticks this entity's movement has been increased relative
+     * to the most recent boost.
+     *
+     * @param ticks the current boost ticks. Must be {@literal >=} 0 and {@literal <=}
+     * {@link #getBoostTicks()}
+     */
+    public void setCurrentBoostTicks(int ticks);
+
+    /**
+     * Get the material used to steer this entity when ridden by a player.
+     *
+     * @return the lure material
+     */
+    @NotNull
+    public Material getSteerMaterial();
+}