Send and receive messages

Also correctly respond to PING with the id, escape some XML content, but not
always

src/xmpp/stanza.hpp

@@ -1,18 +0,0 @@
-#ifndef Stanza
-# define Stanza
-
-class Stanza
-{
-public:
-  explicit Stanza();
-  ~Stanza();
-private:
-  Stanza(const Stanza&) = delete;
-  Stanza(Stanza&&) = delete;
-  Stanza& operator=(const Stanza&) = delete;
-  Stanza& operator=(Stanza&&) = delete;
-};
-
-#endif // Stanza
-
-

src/xmpp/xmpp_component.cpp

@@ -25,6 +25,8 @@ XmppComponent::XmppComponent(const std::string& hostname, const std::string& sec
                                 std::bind(&XmppComponent::handle_handshake, this,std::placeholders::_1));
   this->stanza_handlers.emplace("presence",
                                 std::bind(&XmppComponent::handle_presence, this,std::placeholders::_1));
+  this->stanza_handlers.emplace("message",
+                                std::bind(&XmppComponent::handle_message, this,std::placeholders::_1));
 }
 
 XmppComponent::~XmppComponent()
@@ -151,6 +153,20 @@ void XmppComponent::handle_presence(const Stanza& stanza)
     bridge->join_irc_channel(iid, to.resource);
 }
 
+void XmppComponent::handle_message(const Stanza& stanza)
+{
+  Bridge* bridge = this->get_user_bridge(stanza["from"]);
+  Jid to(stanza["to"]);
+  Iid iid(to.local);
+  XmlNode* body = stanza.get_child("body");
+  if (stanza["type"] == "groupchat")
+    {
+      if (to.resource.empty())
+        if (body && !body->get_inner().empty())
+          bridge->send_channel_message(iid, body->get_inner());
+    }
+}
+
 Bridge* XmppComponent::get_user_bridge(const std::string& user_jid)
 {
   try
@@ -239,3 +255,17 @@ void XmppComponent::send_topic(const std::string& from, const std::string& topic
   message.close();
   this->send_stanza(message);
 }
+
+void XmppComponent::send_muc_message(const std::string& muc_name, const std::string& nick, const std::string body_str, const std::string& jid_to)
+{
+  Stanza message("message");
+  message["to"] = jid_to;
+  message["from"] = muc_name + "@" + this->served_hostname + "/" + nick;
+  message["type"] = "groupchat";
+  XmlNode body("body");
+  body.set_inner(body_str);
+  body.close();
+  message.add_child(std::move(body));
+  message.close();
+  this->send_stanza(message);
+}

src/xmpp/xmpp_component.hpp

@@ -71,11 +71,16 @@ public:
    * Send the MUC topic to the user
    */
   void send_topic(const std::string& from, const std::string& topic, const std::string& to);
+  /**
+   * Send a (non-private) message to the MUC
+   */
+  void send_muc_message(const std::string& muc_name, const std::string& nick, const std::string body_str, const std::string& jid_to);
   /**
    * Handle the various stanza types
    */
   void handle_handshake(const Stanza& stanza);
   void handle_presence(const Stanza& stanza);
+  void handle_message(const Stanza& stanza);
 
 private:
   /**

src/xmpp/xmpp_stanza.cpp

@@ -2,6 +2,26 @@
 
 #include <iostream>
 
+std::string xml_escape(const std::string& data)
+{
+  std::string res;
+  buffer.reserve(data.size());
+  for(size_t pos = 0; pos != data.size(); ++pos)
+    {
+      switch(data[pos])
+        {
+        case '&':  buffer += "&amp;";       break;
+        case '\"': buffer += "&quot;";      break;
+        case '\'': buffer += "&apos;";      break;
+        case '<':  buffer += "&lt;";        break;
+        case '>':  buffer += "&gt;";        break;
+        default:   buffer += data[pos]; break;
+        }
+    }
+  return buffer;
+}
+
+
 XmlNode::XmlNode(const std::string& name, XmlNode* parent):
   name(name),
   parent(parent),
@@ -40,7 +60,22 @@ void XmlNode::set_tail(const std::string& data)
 
 void XmlNode::set_inner(const std::string& data)
 {
-  this->inner = data;
+  this->inner = xml_escape(data);
+}
+
+std::string XmlNode::get_inner() const
+{
+  return this->inner;
+}
+
+XmlNode* XmlNode::get_child(const std::string& name) const
+{
+  for (auto& child: this->children)
+    {
+      if (child->name == name)
+        return child;
+    }
+  return nullptr;
 }
 
 void XmlNode::add_child(XmlNode* child)

src/xmpp/xmpp_stanza.hpp

@@ -7,6 +7,8 @@
 
 #include <expatpp.h>
 
+std::string xml_escape(const std::string& data);
+
 /**
  * Raised on operator[] when the attribute does not exist
  */
@@ -51,8 +53,18 @@ public:
   void set_tail(const std::string& data);
   /**
    * Set the content of the inner, that is the text inside this node
+   * TODO: escape it here.
    */
   void set_inner(const std::string& data);
+  /**
+   * Get the content of inner
+   * TODO: unescape it here.
+   */
+  std::string get_inner() const;
+  /**
+   * Get a pointer to the first child element with that name
+   */
+  XmlNode* get_child(const std::string& name) const;
   void add_child(XmlNode* child);
   void add_child(XmlNode&& child);
   XmlNode* get_last_child() const;