Abstracted statuses, made display event-driven

src/NodeStatus.h

@@ -0,0 +1,62 @@
+#pragma once
+#include <Arduino.h>
+#include "lock.h"
+#include "configuration.h"
+
+namespace meshtastic {
+
+/// Describes the state of the GPS system.
+struct NodeStatus 
+{
+
+    bool isDirty = false;
+    size_t numOnline; // Number of nodes online
+    size_t numTotal;  // Number of nodes total
+
+};
+
+class NodeStatusHandler 
+{
+
+   private:
+    NodeStatus status;
+    CallbackObserver<NodeStatusHandler, const NodeStatus> nodeObserver = CallbackObserver<NodeStatusHandler, const NodeStatus>(this, &NodeStatusHandler::updateStatus);
+    bool initialized = false;
+    /// Protects all of internal state.
+    Lock lock;
+
+   public:
+    Observable<void *> onNewStatus;
+
+    void observe(Observable<const NodeStatus> *source)
+    {
+        nodeObserver.observe(source);
+    }
+
+    bool isInitialized() const { return initialized; }
+    size_t getNumOnline() const { return status.numOnline; }
+    size_t getNumTotal() const { return status.numTotal; }
+
+    int updateStatus(const NodeStatus newStatus) 
+    {
+        // Only update the status if values have actually changed
+        status.isDirty = (
+            newStatus.numOnline != status.numOnline ||
+            newStatus.numTotal != status.numTotal
+        );
+        LockGuard guard(&lock);
+        initialized = true; 
+        status.numOnline = newStatus.numOnline;
+        status.numTotal = newStatus.numTotal;
+        if(status.isDirty) {
+            DEBUG_MSG("Node status update: %d online, %d total\n", status.numOnline, status.numTotal);            
+            onNewStatus.notifyObservers(NULL);
+        }
+        return 0;
+    }
+
+};
+
+}
+
+extern meshtastic::NodeStatus nodeStatus;