separate boat data, integrate with web server

lib/boatData/GwBoatData.cpp

@@ -0,0 +1,54 @@
+#include "GwBoatData.h"
+
+GwBoatItem *GwBoatData::find(String name,bool doCreate){
+    GwBoatItemMap::iterator it;
+    if ((it=values.find(name)) != values.end()){
+        return it->second;
+    }
+    if (! doCreate) return NULL;
+    GwBoatItem *ni=new GwBoatItem();
+    values[name]=ni;
+    return ni;
+}
+GwBoatData::GwBoatData(GwLog *logger){
+    
+}
+GwBoatData::~GwBoatData(){
+    GwBoatItemMap::iterator it;
+    for (it=values.begin() ; it != values.end();it++){
+        delete it->second;
+    }
+}
+void GwBoatData::update(String name,const char *value){
+   GwBoatItem *i=find(name);
+   i->update(value); 
+}
+void GwBoatData::update(String name, String value){
+   GwBoatItem *i=find(name);
+   i->update(value); 
+}
+void GwBoatData::update(String name, long value){
+   GwBoatItem *i=find(name);
+   i->update(value); 
+}
+void GwBoatData::update(String name, double value){
+   GwBoatItem *i=find(name);
+   i->update(value); 
+}
+void GwBoatData::update(String name, bool value){
+    GwBoatItem *i=find(name);
+    i->update(value); 
+}
+String GwBoatData::toJson() const {
+    long minTime=millis() - maxAge;
+    DynamicJsonDocument json(800);
+    GwBoatItemMap::const_iterator it;
+    for (it=values.begin() ; it != values.end();it++){
+        if (it->second->isValid(minTime)){
+            json[it->first]=it->second->getValue();
+        }
+    }
+    String buf;
+    serializeJson(json,buf);
+    return buf;
+}