Support multilang, update code

Signed-off-by: R4SAS <r4sas@i2pmail.org>

i18n/English.cpp

@@ -0,0 +1,56 @@
+#include <map>
+#include <vector>
+#include <string>
+
+// Russian localization file
+
+namespace i2p {
+namespace i18n {
+namespace english { // language
+
+	// See for language plural forms here:
+	// https://localization-guide.readthedocs.io/en/latest/l10n/pluralforms.html
+	int plural (int n) {
+		return n != 1 ? 1 : 0;
+	}
+
+	static std::map<std::string, std::string> strings
+	{
+		{"Enabled", "Enabled"},
+		{"Disabled", "Disabled"}
+	};
+
+	static std::map<std::string, std::vector<std::string>> plurals
+	{
+		{"days",    {"day", "days"}},
+		{"hours",   {"hour", "hours"}},
+		{"minutes", {"minute", "minutes"}},
+		{"seconds", {"second", "seconds"}}
+	};
+
+	std::string GetString (std::string arg)
+	{
+		auto it = strings.find(arg);
+		if (it == strings.end())
+		{
+			return arg;
+		} else {
+			return it->second;
+		}
+	}
+
+	std::string GetPlural (std::string arg, int n)
+	{
+		auto it = plurals.find(arg);
+		if (it == plurals.end())
+		{
+			return arg;
+		} else {
+			int form = plural(n);
+			return it->second[form];
+		}
+	}
+
+} // language
+} // i18n
+} // i2p