start work on webconsole with templates

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

libi2pd_webconsole/inja/template.hpp

@@ -0,0 +1,37 @@
+#ifndef INCLUDE_INJA_TEMPLATE_HPP_
+#define INCLUDE_INJA_TEMPLATE_HPP_
+
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "node.hpp"
+#include "statistics.hpp"
+
+namespace inja {
+
+/*!
+ * \brief The main inja Template.
+ */
+struct Template {
+  BlockNode root;
+  std::string content;
+  std::map<std::string, std::shared_ptr<BlockStatementNode>> block_storage;
+
+  explicit Template() {}
+  explicit Template(const std::string& content): content(content) {}
+
+  /// Return number of variables (total number, not distinct ones) in the template
+  int count_variables() {
+    auto statistic_visitor = StatisticsVisitor();
+    root.accept(statistic_visitor);
+    return statistic_visitor.variable_counter;
+  }
+};
+
+using TemplateStorage = std::map<std::string, Template>;
+
+} // namespace inja
+
+#endif // INCLUDE_INJA_TEMPLATE_HPP_