restructuring

include/api.h

@@ -1,5 +1,8 @@
 #pragma once
 
+//major minor patch
+#define LITTLESNITCH_VERSION 100
+
 #include <iostream>
 #include <map>
 #include <vector>
@@ -7,6 +10,42 @@
 #include <algorithm>
 #include <string>
 
+#include <qdebug.h>
+
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+template<typename T, typename K>
+bool json_get(json j, T& value, K key) noexcept {
+    try {
+        j[key].get_to(value);
+        return true;
+    } catch (nlohmann::detail::type_error& err) {
+        std::cout << "key " << key << " error " << err.what();
+    } catch (nlohmann::detail::out_of_range& err) {
+        std::cout << "key " << key << " error " << err.what();
+    } catch (nlohmann::detail::other_error& err) {
+        std::cout << "key " << key << " error " << err.what();
+    }
+    return false;
+}
+
+template<typename T, typename K, typename... Ks>
+bool json_get(json j, T& value, K key, Ks... keys) noexcept {
+    try {
+        return json_get(j[key], value, keys...);
+    } catch (nlohmann::detail::type_error& err) {
+        std::cout << "key " << key << " error " << err.what();
+    } catch (nlohmann::detail::out_of_range& err) {
+        std::cout << "key " << key << " error " << err.what();
+    } catch (nlohmann::detail::other_error& err) {
+        std::cout << "key " << key << " error " << err.what();
+    }
+    return false;
+}
+
+
 //! represents one item in the http history.
 struct HistoryItem {
     int id = -1;