New 'isConnected' API

Summary:
Expose a new API to be used to check if there's an open connection with Flipper Desktop.

Changelog: new FlipperClient isConnected API

Reviewed By: antonk52

Differential Revision: D46841095

fbshipit-source-id: 82a60f52496fb218cb50c6a28d7ffe7225ae23aa

xplat/Flipper/FlipperClient.cpp

@@ -160,6 +160,13 @@ void FlipperClient::onDisconnected() {
   });
 }
 
+bool FlipperClient::isConnected() {
+  if (socket_ != nullptr) {
+    return socket_->isConnected();
+  }
+  return false;
+}
+
 void FlipperClient::onMessageReceived(
     const dynamic& message,
     std::unique_ptr<FlipperResponder> uniqueResponder) {

xplat/Flipper/FlipperClient.h

@@ -74,6 +74,8 @@ class FlipperClient : public FlipperConnectionManager::Callbacks {
 
   void onDisconnected() override;
 
+  bool isConnected();
+
   void onMessageReceived(
       const folly::dynamic& message,
       std::unique_ptr<FlipperResponder>) override;

xplat/Flipper/FlipperConnectionManager.h

@@ -47,7 +47,7 @@ class FlipperConnectionManager {
    True if there's an open connection.
    This method may block if the connection is busy.
    */
-  virtual bool isOpen() const = 0;
+  virtual bool isConnected() const = 0;
 
   /**
    Send message to the ws server.

xplat/Flipper/FlipperConnectionManagerImpl.cpp

@@ -55,7 +55,7 @@ class ConnectionEvents {
       }
       switch (event) {
         case SocketEvent::OPEN:
-          impl->isOpen_ = true;
+          impl->isConnected_ = true;
           if (impl->connectionIsTrusted_) {
             impl->callbacks_->onConnected();
           }
@@ -66,9 +66,10 @@ class ConnectionEvents {
           break;
         case SocketEvent::CLOSE:
         case SocketEvent::ERROR:
-          if (!impl->isOpen_)
+          if (!impl->isConnected_) {
             return;
-          impl->isOpen_ = false;
+          }
+          impl->isConnected_ = false;
           if (impl->connectionIsTrusted_) {
             impl->connectionIsTrusted_ = false;
             impl->callbacks_->onDisconnected();
@@ -144,7 +145,7 @@ void FlipperConnectionManagerImpl::startSync() {
     log(WRONG_THREAD_EXIT_MSG);
     return;
   }
-  if (isOpen()) {
+  if (isConnected()) {
     log("Already connected");
     return;
   }
@@ -317,8 +318,8 @@ void FlipperConnectionManagerImpl::stop() {
   join.wait();
 }
 
-bool FlipperConnectionManagerImpl::isOpen() const {
-  return isOpen_ && connectionIsTrusted_;
+bool FlipperConnectionManagerImpl::isConnected() const {
+  return isConnected_ && connectionIsTrusted_;
 }
 
 void FlipperConnectionManagerImpl::setCallbacks(Callbacks* callbacks) {

xplat/Flipper/FlipperConnectionManagerImpl.h

@@ -36,7 +36,7 @@ class FlipperConnectionManagerImpl : public FlipperConnectionManager {
 
   void stop() override;
 
-  bool isOpen() const override;
+  bool isConnected() const override;
 
   void setCallbacks(Callbacks* callbacks) override;
 
@@ -54,7 +54,7 @@ class FlipperConnectionManagerImpl : public FlipperConnectionManager {
   std::shared_ptr<FlipperCertificateProvider> getCertificateProvider() override;
 
  private:
-  bool isOpen_ = false;
+  bool isConnected_ = false;
   bool isStarted_ = false;
   std::shared_ptr<FlipperCertificateProvider> certProvider_ = nullptr;
   Callbacks* callbacks_;