Added enablePlugin and disablePlugin, triggers events

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/plugin/PluginLoader.java

@@ -34,4 +34,22 @@ public interface PluginLoader {
      * @param event Event details
      */
     public void callEvent(RegisteredListener registration, Event event);
+
+    /**
+     * Enables the specified plugin
+     *
+     * Attempting to enable a plugin that is already enabled will have no effect
+     *
+     * @param plugin Plugin to enable
+     */
+    public void enablePlugin(Plugin plugin);
+
+    /**
+     * Disables the specified plugin
+     *
+     * Attempting to disable a plugin that is not enabled will have no effect
+     *
+     * @param plugin Plugin to disable
+     */
+    public void disablePlugin(Plugin plugin);
 }

paper-api/src/main/java/org/bukkit/plugin/PluginManager.java

@@ -84,4 +84,22 @@ public interface PluginManager {
      * @param plugin Plugin to register
      */
     public void registerEvent(Event.Type type, Listener listener, Priority priority, Plugin plugin);
+
+    /**
+     * Enables the specified plugin
+     *
+     * Attempting to enable a plugin that is already enabled will have no effect
+     *
+     * @param plugin Plugin to enable
+     */
+    public void enablePlugin(Plugin plugin);
+
+    /**
+     * Disables the specified plugin
+     *
+     * Attempting to disable a plugin that is not enabled will have no effect
+     *
+     * @param plugin Plugin to disable
+     */
+    public void disablePlugin(Plugin plugin);
 }

paper-api/src/main/java/org/bukkit/plugin/SimplePluginManager.java

@@ -161,6 +161,18 @@ public final class SimplePluginManager implements PluginManager {
         }
     }
 
+    public void enablePlugin(final Plugin plugin) {
+        if (!plugin.isEnabled()) {
+            plugin.getPluginLoader().enablePlugin(plugin);
+        }
+    }
+
+    public void disablePlugin(final Plugin plugin) {
+        if (plugin.isEnabled()) {
+            plugin.getPluginLoader().disablePlugin(plugin);
+        }
+    }
+
     /**
      * Calls a player related event with the given details
      *

paper-api/src/main/java/org/bukkit/plugin/java/JavaPlugin.java

@@ -88,4 +88,21 @@ public abstract class JavaPlugin implements Plugin {
     protected ClassLoader getClassLoader() {
         return classLoader;
     }
+
+    /**
+     * Sets the enabled state of this plugin
+     *
+     * @param enabled true if enabled, otherwise false
+     */
+    protected void setEnabled(final boolean enabled) {
+        if (isEnabled != enabled) {
+            isEnabled = enabled;
+
+            if (isEnabled) {
+                onEnable();
+            }  else {
+                onDisable();
+            }
+        }
+    }
 }

paper-api/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java

@@ -138,4 +138,32 @@ public final class JavaPluginLoader implements PluginLoader {
             }
         }
     }
+
+    public void enablePlugin(final Plugin plugin) {
+        if (!(plugin instanceof JavaPlugin)) {
+            throw new IllegalArgumentException("Plugin is not associated with this PluginLoader");
+        }
+
+        if (plugin.isEnabled()) {
+            JavaPlugin jPlugin = (JavaPlugin)plugin;
+
+            server.getPluginManager().callEvent(new PluginEvent(Event.Type.PLUGIN_ENABLE, plugin));
+            
+            jPlugin.setEnabled(true);
+        }
+    }
+
+    public void disablePlugin(Plugin plugin) {
+        if (!(plugin instanceof JavaPlugin)) {
+            throw new IllegalArgumentException("Plugin is not associated with this PluginLoader");
+        }
+
+        if (!plugin.isEnabled()) {
+            JavaPlugin jPlugin = (JavaPlugin)plugin;
+
+            server.getPluginManager().callEvent(new PluginEvent(Event.Type.PLUGIN_DISABLE, plugin));
+
+            jPlugin.setEnabled(false);
+        }
+    }
 }