New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/platform/servers_list.cpp

@@ -0,0 +1,82 @@
+#include "platform/servers_list.hpp"
+
+#include "platform/http_request.hpp"
+#include "platform/platform.hpp"
+#include "platform/settings.hpp"
+
+#include "base/logging.hpp"
+#include "base/assert.hpp"
+
+#include "cppjansson/cppjansson.hpp"
+
+namespace downloader
+{
+
+std::optional<MetaConfig> ParseMetaConfig(std::string const & jsonStr)
+{
+  char const kSettings[] = "settings";
+  char const kServers[] = "servers";
+  char const kProductsConfig[] = "productsConfig";
+
+  MetaConfig outMetaConfig;
+  try
+  {
+    const base::Json root(jsonStr.c_str());
+    const json_t * servers;
+    if (json_is_object(root.get()))
+    {
+      // New format:
+      // {
+      //   "servers": ["http://url1", "http://url2", "http://url3"],
+      //   "settings": {
+      //      "key1": "value1",
+      //      "key2": "http://url"
+      //    }
+      // }
+
+      json_t * settings = json_object_get(root.get(), kSettings);
+      const char * key;
+      const json_t * value;
+      json_object_foreach(settings, key, value)
+      {
+        if (key == settings::kDonateUrl || key == settings::kNY)
+        {
+          const char * valueStr = json_string_value(value);
+          if (value)
+            outMetaConfig.m_settings[key] = valueStr;
+        }
+      }
+
+      servers = json_object_get(root.get(), kServers);
+
+      auto const productsConfig = json_object_get(root.get(), kProductsConfig);
+      if (productsConfig)
+        outMetaConfig.m_productsConfig = json_dumps(productsConfig, JSON_ENCODE_ANY);
+      else
+        LOG(LINFO, ("No ProductsConfig in meta configuration"));
+    }
+    else
+    {
+      // Old format:
+      // ["http://url1", "http://url2", "http://url3"]
+      servers = root.get();
+    }
+
+    for (size_t i = 0; i < json_array_size(servers); ++i)
+    {
+      char const * url = json_string_value(json_array_get(servers, i));
+      if (url)
+        outMetaConfig.m_serversList.push_back(url);
+    }
+  }
+  catch (base::Json::Exception const & ex)
+  {
+    LOG(LWARNING, ("Can't parse meta configuration:", ex.Msg(), jsonStr));
+  }
+
+  if (outMetaConfig.m_serversList.empty())
+    return std::nullopt;
+
+  return outMetaConfig;
+}
+} // namespace downloader