Implemented http status codes and htmlbuilder

src/htmlbuilder.h

@@ -0,0 +1,53 @@
+#pragma once
+
+// system includes
+#include <string>
+#include <string_view>
+
+namespace esphttpdutils {
+
+class HtmlTag
+{
+public:
+    HtmlTag(std::string_view tagName, std::string &body);
+
+    HtmlTag(std::string_view tagName, std::string_view attributes, std::string &body);
+
+    ~HtmlTag();
+
+private:
+    const std::string_view m_tagName;
+    std::string &m_body;
+};
+
+inline HtmlTag::HtmlTag(std::string_view tagName, std::string &body) :
+    m_tagName{tagName},
+    m_body{body}
+{
+    m_body += '<';
+    m_body += m_tagName;
+    m_body += '>';
+}
+
+inline HtmlTag::HtmlTag(std::string_view tagName, std::string_view attributes, std::string &body) :
+    m_tagName{tagName},
+    m_body{body}
+{
+    m_body += '<';
+    m_body += m_tagName;
+    if (!attributes.empty())
+    {
+        m_body += ' ';
+        m_body += attributes;
+    }
+    m_body += '>';
+}
+
+inline HtmlTag::~HtmlTag()
+{
+    m_body += "</";
+    m_body += m_tagName;
+    m_body += '>';
+}
+
+} // namespace esphttpdutils