Respond to MAM requests on a channel JID

At the moment, result-set-management is not implemented, the whole history
(well, at most 1024 messages) is returned.

louloulibs/utils/time.cpp

@@ -0,0 +1,12 @@
+#include <utils/time.hpp>
+
+namespace utils
+{
+std::string to_string(const std::time_t& timestamp)
+{
+    constexpr std::size_t stamp_size = 20;
+    char date_buf[stamp_size];
+    std::strftime(date_buf, stamp_size, "%FT%TZ", std::gmtime(&timestamp));
+    return {std::begin(date_buf), std::end(date_buf)};
+}
+}

louloulibs/utils/time.hpp

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <ctime>
+#include <string>
+
+namespace utils
+{
+std::string to_string(const std::time_t& timestamp);
+}

louloulibs/xmpp/jid.hpp

@@ -26,7 +26,12 @@ public:
   }
   std::string full() const
   {
-    return this->local + "@" + this->domain + "/" + this->resource;
+    std::string res = this->domain;
+    if (!this->local.empty())
+      res = this->local + "@" + this->domain;
+    if (!this->resource.empty())
+      res += "/" + this->resource;
+    return res;
   }
 };
 

louloulibs/xmpp/xmpp_component.cpp

@@ -7,22 +7,10 @@
 #include <config/config.hpp>
 #include <xmpp/jid.hpp>
 #include <utils/sha1.hpp>
-
-#include <stdexcept>
-#include <iostream>
-#include <set>
-
-#include <stdio.h>
+#include <utils/time.hpp>
 
 #include <uuid.h>
 
-#include <cstdlib>
-
-#include <louloulibs.h>
-#ifdef SYSTEMD_FOUND
-# include <systemd/sd-daemon.h>
-#endif
-
 using namespace std::string_literals;
 
 static std::set<std::string> kickable_errors{
@@ -443,12 +431,9 @@ void XmppComponent::send_history_message(const std::string& muc_name, const std:
   message.add_child(std::move(body));
 
   XmlNode delay("delay");
-  delay["xmlns"] = "urn:xmpp:delay";
+  delay["xmlns"] = DELAY_NS;
   delay["from"] = muc_name + "@" + this->served_hostname;
-  constexpr std::size_t stamp_size = 20;
-  char date_buf[stamp_size];
-  std::strftime(date_buf, stamp_size, "%FT%TZ", std::gmtime(&timestamp));
-  delay["stamp"] = date_buf;
+  delay["stamp"] = utils::to_string(timestamp);
 
   message.add_child(std::move(delay));
   this->send_stanza(message);

louloulibs/xmpp/xmpp_component.hpp

@@ -26,6 +26,10 @@
 #define VERSION_NS       "jabber:iq:version"
 #define ADHOC_NS         "http://jabber.org/protocol/commands"
 #define PING_NS          "urn:xmpp:ping"
+#define DELAY_NS         "urn:xmpp:delay"
+#define MAM_NS           "urn:xmpp:mam:1"
+#define FORWARD_NS       "urn:xmpp:forward:0"
+#define CLIENT_NS        "jabber:client"
 
 /**
  * An XMPP component, communicating with an XMPP server using the protocole