[ntcore] NetworkTables 4 (#3217)

wpilibc/src/main/native/cpp/event/NetworkBooleanEvent.cpp

@@ -0,0 +1,40 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#include "frc/event/NetworkBooleanEvent.h"
+
+#include <networktables/BooleanTopic.h>
+#include <networktables/NetworkTable.h>
+#include <networktables/NetworkTableInstance.h>
+
+using namespace frc;
+
+NetworkBooleanEvent::NetworkBooleanEvent(EventLoop* loop,
+                                         nt::BooleanTopic topic)
+    : NetworkBooleanEvent{loop, topic.Subscribe(false)} {}
+
+NetworkBooleanEvent::NetworkBooleanEvent(EventLoop* loop,
+                                         nt::BooleanSubscriber sub)
+    : BooleanEvent{
+          loop,
+          [sub = std::make_shared<nt::BooleanSubscriber>(std::move(sub))] {
+            return sub->GetTopic().GetInstance().IsConnected() && sub->Get();
+          }} {}
+
+NetworkBooleanEvent::NetworkBooleanEvent(
+    EventLoop* loop, std::shared_ptr<nt::NetworkTable> table,
+    std::string_view topicName)
+    : NetworkBooleanEvent{loop, table->GetBooleanTopic(topicName)} {}
+
+NetworkBooleanEvent::NetworkBooleanEvent(EventLoop* loop,
+                                         std::string_view tableName,
+                                         std::string_view topicName)
+    : NetworkBooleanEvent{loop, nt::NetworkTableInstance::GetDefault(),
+                          tableName, topicName} {}
+
+NetworkBooleanEvent::NetworkBooleanEvent(EventLoop* loop,
+                                         nt::NetworkTableInstance inst,
+                                         std::string_view tableName,
+                                         std::string_view topicName)
+    : NetworkBooleanEvent{loop, inst.GetTable(tableName), topicName} {}