Add extension support to InspectorSonarPlugin

Summary:
This mirrors the extension support added to the desktop plugin and allows people to dynamically
add extension commands

Reviewed By: danielbuechele

Differential Revision: D8691167

fbshipit-source-id: 60136b960f8bbdfa42b2077d1f5f7b391fc44443

android/plugins/inspector/InspectorSonarPlugin.java

@@ -38,6 +38,19 @@ public class InspectorSonarPlugin implements SonarPlugin {
   private String mHighlightedId;
   private TouchOverlayView mTouchOverlay;
   private SonarConnection mConnection;
+  private @Nullable List<ExtensionCommand> mExtensionCommands;
+
+  /** An interface for extensions to the Inspector Sonar plugin */
+  public interface ExtensionCommand {
+    /** The command to respond to */
+    String command();
+    /** The corresponding SonarReceiver for the command */
+    SonarReceiver receiver(ObjectTracker tracker, SonarConnection connection);
+  }
+
+  public InspectorSonarPlugin(Context context, DescriptorMapping descriptorMapping) {
+    this(context, descriptorMapping, new NullScriptingEnvironment());
+  }
 
   public InspectorSonarPlugin(
       Context context,
@@ -46,23 +59,45 @@ public class InspectorSonarPlugin implements SonarPlugin {
     this(
         new ApplicationWrapper((Application) context.getApplicationContext()),
         descriptorMapping,
-        scriptingEnvironment);
+        scriptingEnvironment,
+        null);
   }
 
-  public InspectorSonarPlugin(Context context, DescriptorMapping descriptorMapping) {
-    this(context, descriptorMapping, new NullScriptingEnvironment());
+  public InspectorSonarPlugin(
+      Context context,
+      DescriptorMapping descriptorMapping,
+      @Nullable List<ExtensionCommand> extensions) {
+    this(
+        new ApplicationWrapper((Application) context.getApplicationContext()),
+        descriptorMapping,
+        new NullScriptingEnvironment(),
+        extensions);
+  }
+
+  public InspectorSonarPlugin(
+      Context context,
+      DescriptorMapping descriptorMapping,
+      ScriptingEnvironment scriptingEnvironment,
+      @Nullable List<ExtensionCommand> extensions) {
+    this(
+        new ApplicationWrapper((Application) context.getApplicationContext()),
+        descriptorMapping,
+        scriptingEnvironment,
+        extensions);
   }
 
   // Package visible for testing
   InspectorSonarPlugin(
       ApplicationWrapper wrapper,
       DescriptorMapping descriptorMapping,
-      ScriptingEnvironment scriptingEnvironment) {
+      ScriptingEnvironment scriptingEnvironment,
+      @Nullable List<ExtensionCommand> extensions) {
     mDescriptorMapping = descriptorMapping;
 
     mObjectTracker = new ObjectTracker();
     mApplication = wrapper;
     mScriptingEnvironment = scriptingEnvironment;
+    mExtensionCommands = extensions;
   }
 
   @Override
@@ -91,6 +126,13 @@ public class InspectorSonarPlugin implements SonarPlugin {
     connection.receive("setHighlighted", mSetHighlighted);
     connection.receive("setSearchActive", mSetSearchActive);
     connection.receive("getSearchResults", mGetSearchResults);
+
+    if (mExtensionCommands != null) {
+      for (ExtensionCommand extensionCommand : mExtensionCommands) {
+        connection.receive(
+            extensionCommand.command(), extensionCommand.receiver(mObjectTracker, mConnection));
+      }
+    }
   }
 
   @Override

android/plugins/inspector/ObjectTracker.java

@@ -13,7 +13,9 @@ import java.util.HashMap;
 import java.util.Map;
 import javax.annotation.Nullable;
 
-class ObjectTracker {
+public class ObjectTracker {
+  ObjectTracker() {}
+
   private final Map<String, WeakReference<Object>> mObjects = new HashMap<>();
 
   void put(String id, Object obj) {
@@ -21,7 +23,7 @@ class ObjectTracker {
   }
 
   @Nullable
-  Object get(String id) {
+  public Object get(String id) {
     final WeakReference<Object> weakObj = mObjects.get(id);
     if (weakObj == null) {
       return null;