Add getStateSummary method for diagnostics

Summary:
Adds a more structured representation of state updates than a multiline string.
Also changes the string form to omit [started] records.

Reviewed By: danielbuechele

Differential Revision: D9315503

fbshipit-source-id: 55b8f9572091fd42fe852c8d26a8f2a53f76c82a

android/src/main/java/com/facebook/sonar/android/SonarClientImpl.java

@@ -14,6 +14,7 @@ import com.facebook.sonar.BuildConfig;
 import com.facebook.sonar.core.SonarClient;
 import com.facebook.sonar.core.SonarPlugin;
 import com.facebook.sonar.core.SonarStateUpdateListener;
+import com.facebook.sonar.core.StateSummary;
 
 @DoNotStrip
 class SonarClientImpl implements SonarClient {
@@ -65,4 +66,7 @@ class SonarClientImpl implements SonarClient {
 
   @Override
   public native String getState();
+
+  @Override
+  public native StateSummary getStateSummary();
 }

android/src/main/java/com/facebook/sonar/core/SonarClient.java

@@ -23,4 +23,6 @@ public interface SonarClient {
   void unsubscribe();
 
   String getState();
+
+  StateSummary getStateSummary();
 }

android/src/main/java/com/facebook/sonar/core/StateElement.java

@@ -0,0 +1,13 @@
+package com.facebook.sonar.core;
+
+public class StateElement {
+    private final String mName;
+    private final String mState;
+    public StateElement(String name, String state) {
+      mName = name;
+      mState = state;
+    }
+    public String getName() {
+      return mName;
+    }
+}

android/src/main/java/com/facebook/sonar/core/StateSummary.java

@@ -0,0 +1,38 @@
+package com.facebook.sonar.core;
+
+import java.util.List;
+import java.util.ArrayList;
+
+public class StateSummary {
+
+  public enum State {
+    IN_PROGRESS, SUCCESS, FAILED, UNKNOWN;
+  }
+
+  public static class StateElement {
+    private final String mName;
+    private final State mState;
+    public StateElement(String name, State state) {
+      mName = name;
+      mState = state;
+    }
+    public String getName() {
+      return mName;
+    }
+    public State getState() {
+      return mState;
+    }
+  }
+
+  public final List<StateElement> mList = new ArrayList<>();
+
+  public void addEntry(String name, String state) {
+    State s;
+    try {
+      s = State.valueOf(state);
+    } catch (RuntimeException e) {
+      s = State.UNKNOWN;
+    }
+    mList.add(new StateElement(name, s));
+  }
+}