remove concept of settings object from library

common/settings_json.cpp

@@ -0,0 +1,46 @@
+#include "settings_json.hpp"
+#include <rapidjson/prettywriter.h>
+#include <rapidjson/filestream.h>
+#include <rapidjson/document.h>
+#include <stdio.h>
+
+using namespace llmr;
+
+Settings_JSON::Settings_JSON() { load(); }
+
+void Settings_JSON::load() {
+    FILE *settingsFile = fopen("/tmp/llmr-native.json", "r");
+    if (settingsFile != NULL) {
+        rapidjson::FileStream is(settingsFile);
+        rapidjson::Document document;
+        document.ParseStream<0>(is);
+        if (document.IsArray()) {
+            longitude = document[rapidjson::SizeType(0)].GetDouble();
+            latitude = document[1].GetDouble();
+            zoom = document[2].GetDouble();
+            angle = document[3].GetDouble();
+            debug = document[4].GetBool();
+        }
+    }
+}
+
+void Settings_JSON::save() {
+
+    rapidjson::FileStream s(fopen("/tmp/llmr-native.json", "w"));
+    rapidjson::PrettyWriter<rapidjson::FileStream> writer(s);
+    writer.StartArray();
+    writer.Double(longitude);
+    writer.Double(latitude);
+    writer.Double(zoom);
+    writer.Double(angle);
+    writer.Bool(debug);
+    writer.EndArray();
+}
+
+void Settings_JSON::clear() {
+    longitude = 0;
+    latitude = 0;
+    zoom = 0;
+    angle = 0;
+    debug = false;
+}