FlightTasks: error to char string message

src/lib/FlightTasks/FlightTasks.cpp

@@ -140,6 +140,17 @@ void FlightTasks::handleParameterUpdate()
 	}
 }
 
+const char *FlightTasks::errorToString(const int error)
+{
+	for (auto e : _taskError) {
+		if (e.error == error) {
+			return e.msg;
+		}
+	}
+
+	return "This error is not mapped to a string or is unknown.";
+}
+
 void FlightTasks::_updateCommand()
 {
 //	TODO: port flight task mavlink command to have support for this functionality

src/lib/FlightTasks/FlightTasks.hpp

@@ -134,6 +134,11 @@ public:
 	 */
 	void handleParameterUpdate();
 
+	/**
+	 * Call this method to get the description of a task error.
+	 */
+	const char *errorToString(const int error);
+
 private:
 
 	/**
@@ -161,6 +166,21 @@ private:
 
 	SubscriptionArray _subscription_array;
 
+	struct task_error_t {
+		int error;
+		const char *msg;
+	};
+
+	static const int _numError = 4;
+	/**
+	 * Map from Error int to user friendly string.
+	 */
+	task_error_t _taskError[_numError] = {
+		{0, "No Error"},
+		{-1, "Invalid Task "},
+		{-2, "Subscription Failed"},
+		{-3, "Activation Failed"}
+	};
 	/**
 	 * Check for vehicle commands (received via MAVLink), evaluate and acknowledge them
 	 */