Don’t use ! as the separator for nicknames, use % instead

It’s now easier to use. The distinction between a nick and a channel name is
based on the first character (by default it's '#' and '&'). The user doesn’t
have to worry about which separator to use anymore.

fix #3066

4 files changed, 105 insertions, 91 deletions

diff --git a/src/irc/iid.cpp b/src/irc/iid.cpp
index 0e2841e..c951a49 100644
--- a/src/irc/iid.cpp
+++ b/src/irc/iid.cpp
@@ -1,62 +1,70 @@
 #include <utils/tolower.hpp>
 #include <config/config.hpp>
-
+#include <bridge/bridge.hpp>
 #include <irc/iid.hpp>
 
 #include <utils/encoding.hpp>
 
-Iid::Iid(const std::string& iid):
-  is_channel(false),
-  is_user(false)
+Iid::Iid(const std::string local, const std::string server, Iid::Type type):
+        type(type),
+        local(local),
+        server(server)
 {
-  const std::string fixed_irc_server = Config::get("fixed_irc_server", "");
-  if (fixed_irc_server.empty())
-    this->init(iid);
-  else
-    this->init_with_fixed_server(iid, fixed_irc_server);
 }
 
+Iid::Iid(const std::string& iid, const std::set<char>& chantypes)
+{
+  this->init(iid);
+  this->set_type(std::set<char>(chantypes));
+}
 
-void Iid::init(const std::string& iid)
+Iid::Iid(const std::string& iid, const std::initializer_list<char>& chantypes):
+    Iid(iid, std::set<char>(chantypes))
 {
-  const std::string::size_type sep = iid.find_first_of("%!");
-  if (sep != std::string::npos)
-    {
-      if (iid[sep] == '%')
-        this->is_channel = true;
-      else
-        this->is_user = true;
-      this->set_local(iid.substr(0, sep));
-      this->set_server(iid.substr(sep + 1));
-    }
-  else
-    this->set_server(iid);
 }
 
-void Iid::init_with_fixed_server(const std::string& iid, const std::string& hostname)
+Iid::Iid(const std::string& iid, const Bridge *bridge)
+{
+  this->init(iid);
+  const auto chantypes = bridge->get_chantypes(this->server);
+  this->set_type(chantypes);
+}
+
+void Iid::set_type(const std::set<char>& chantypes)
 {
-  this->set_server(hostname);
+  if (this->local.empty())
+    return;
 
-  const std::string::size_type sep = iid.find("!");
+  if (chantypes.count(this->local[0]) == 1)
+    this->type = Iid::Type::Channel;
+  else
+    this->type = Iid::Type::User;
+}
 
-  // Without any separator, we consider that it's a channel
-  if (sep == std::string::npos)
+void Iid::init(const std::string& iid)
+{
+  const std::string fixed_irc_server = Config::get("fixed_irc_server", "");
+
+  if (fixed_irc_server.empty())
+  {
+    const std::string::size_type sep = iid.find('%');
+    if (sep != std::string::npos)
     {
-      this->is_channel = true;
-      this->set_local(iid);
+      this->set_local(iid.substr(0, sep));
+      this->set_server(iid.substr(sep + 1));
+      this->type = Iid::Type::Channel;
     }
-  else // A separator can be present to differenciate a channel from a user,
-       // but the part behind it (the hostname) is ignored
+    else
     {
-      this->set_local(iid.substr(0, sep));
-        this->is_user = true;
+      this->set_server(iid);
+      this->type = Iid::Type::Server;
     }
-}
-
-Iid::Iid():
-  is_channel(false),
-  is_user(false)
-{
+  }
+  else
+  {
+    this->set_server(fixed_irc_server);
+    this->set_local(iid);
+  }
 }
 
 void Iid::set_local(const std::string& loc)
@@ -88,27 +96,18 @@ const std::string& Iid::get_server() const
   return this->server;
 }
 
-std::string Iid::get_sep() const
-{
-  if (this->is_channel)
-    return "%";
-  else if (this->is_user)
-    return "!";
-  return "";
-}
-
 namespace std {
   const std::string to_string(const Iid& iid)
   {
     if (Config::get("fixed_irc_server", "").empty())
-      return iid.get_encoded_local() + iid.get_sep() + iid.get_server();
+    {
+      if (iid.type == Iid::Type::Server)
+        return iid.get_server();
+      else
+        return iid.get_encoded_local() + iid.separator + iid.get_server();
+    }
     else
-      {
-        if (iid.get_sep() == "!")
-          return iid.get_encoded_local() + iid.get_sep();
-        else
-          return iid.get_encoded_local();
-      }
+      return iid.get_encoded_local();
   }
 }
 
diff --git a/src/irc/iid.hpp b/src/irc/iid.hpp
index 3b11470..7361c51 100644
--- a/src/irc/iid.hpp
+++ b/src/irc/iid.hpp
@@ -2,48 +2,64 @@
 
 
 #include <string>
+#include <set>
+
+class Bridge;
 
 /**
  * A name representing an IRC channel on an IRC server, or an IRC user on an
  * IRC server, or just an IRC server.
  *
- * The separator for an user is '!', for a channel it's '%'. If no separator
- * is present, it's just an irc server.
+ * The separator is '%' between the local part (nickname or channel) and the
+ * server part. If no separator is present, it's just an irc server.
+ * If it is present, the first character of the local part determines if it’s
+ * a channel or a user: ff the local part is empty or if its first character
+ * is part of the chantypes characters, then it’s a channel, otherwise it’s
+ * a user.
+ *
  * It’s possible to have an empty-string server, but it makes no sense in
- * the biboumi context.
+ * biboumi’s context.
+ *
+ * Assuming the chantypes are '#' and '&':
  *
  * #test%irc.example.org has :
  * - local: "#test" (the # is part of the name, it could very well be absent, or & (for example) instead)
  * - server: "irc.example.org"
- * - is_channel: true
- * - is_user: false
+ * - type: channel
  *
  * %irc.example.org:
  * - local: ""
  * - server: "irc.example.org"
- * - is_channel: true
- * - is_user: false
- * Note: this is the special empty-string channel, used internal in biboumi
+ * - type: channel
+ * Note: this is the special empty-string channel, used internally in biboumi
  * but has no meaning on IRC.
  *
- * foo!irc.example.org
+ * foo%irc.example.org
  * - local: "foo"
  * - server: "irc.example.org"
- * - is_channel: false
- * - is_user: true
- * Note: the empty-string user (!irc.example.org) has no special meaning in biboumi
+ * - type: user
+ * Note: the empty-string user (!irc.example.org) makes no sense for biboumi
  *
  * irc.example.org:
  * - local: ""
  * - server: "irc.example.org"
- * - is_channel: false
- * - is_user: false
+ * - type: server
  */
 class Iid
 {
 public:
-  Iid(const std::string& iid);
-  Iid();
+  enum class Type
+  {
+      Channel,
+      User,
+      Server,
+  };
+  static constexpr auto separator = "%";
+  Iid(const std::string& iid, const std::set<char>& chantypes);
+  Iid(const std::string& iid, const std::initializer_list<char>& chantypes);
+  Iid(const std::string& iid, const Bridge* bridge);
+  Iid(const std::string local, const std::string server, Type type);
+  Iid() = default;
   Iid(const Iid&) = default;
 
   Iid(Iid&&) = delete;
@@ -52,21 +68,19 @@ public:
 
   void set_local(const std::string& loc);
   void set_server(const std::string& serv);
+
   const std::string& get_local() const;
   const std::string get_encoded_local() const;
   const std::string& get_server() const;
 
-  bool is_channel;
-  bool is_user;
-
-  std::string get_sep() const;
-
   std::tuple<std::string, std::string> to_tuple() const;
 
+  Type type { Type::Server };
+
 private:
 
   void init(const std::string& iid);
-  void init_with_fixed_server(const std::string& iid, const std::string& hostname);
+  void set_type(const std::set<char>& chantypes);
 
   std::string local;
   std::string server;
diff --git a/src/irc/irc_client.cpp b/src/irc/irc_client.cpp
index dd83307..d00b6ee 100644
--- a/src/irc/irc_client.cpp
+++ b/src/irc/irc_client.cpp
@@ -213,7 +213,7 @@ void IrcClient::on_connection_failed(const std::string& reason)
       // Send an error message for all room that the user wanted to join
       for (const auto& tuple: this->channels_to_join)
         {
-          Iid iid(std::get<0>(tuple) + "%" + this->hostname);
+          Iid iid(std::get<0>(tuple) + "%" + this->hostname, this->chantypes);
           this->bridge.send_presence_error(iid, this->current_nick,
                                             "cancel", "item-not-found",
                                             "", reason);
@@ -551,7 +551,7 @@ void IrcClient::on_notice(const IrcMessage& message)
       if (this->nicks_to_treat_as_private.find(nick) !=
           this->nicks_to_treat_as_private.end())
         { // We previously sent a message to that nick)
-          this->bridge.send_message({nick + "!" + this->hostname}, nick, body,
+          this->bridge.send_message({nick, this->hostname, Iid::Type::User}, nick, body,
                                      false);
         }
       else
@@ -663,12 +663,12 @@ void IrcClient::on_channel_message(const IrcMessage& message)
   bool muc = true;
   if (!this->get_channel(iid.get_local())->joined)
     {
-      iid.is_user = true;
+      iid.type = Iid::Type::User;
       iid.set_local(nick);
       muc = false;
     }
   else
-    iid.is_channel = true;
+    iid.type = Iid::Type::Channel;
   if (!body.empty() && body[0] == '\01')
     {
       if (body.substr(1, 6) == "ACTION")
@@ -780,7 +780,7 @@ void IrcClient::on_nickname_conflict(const IrcMessage& message)
     Iid iid;
     iid.set_local(it->first);
     iid.set_server(this->hostname);
-    iid.is_channel = true;
+    iid.type = Iid::Type::Channel;
     this->bridge.send_nickname_conflict_error(iid, nickname);
   }
 }
@@ -797,7 +797,7 @@ void IrcClient::on_nickname_change_too_fast(const IrcMessage& message)
     Iid iid;
     iid.set_local(it->first);
     iid.set_server(this->hostname);
-    iid.is_channel = true;
+    iid.type = Iid::Type::Channel;
     this->bridge.send_presence_error(iid, nickname,
                                       "cancel", "not-acceptable",
                                       "", txt);
@@ -858,7 +858,7 @@ void IrcClient::on_part(const IrcMessage& message)
       Iid iid;
       iid.set_local(chan_name);
       iid.set_server(this->hostname);
-      iid.is_channel = true;
+      iid.type = Iid::Type::Channel;
       bool self = channel->get_self()->nick == nick;
       if (self)
       {
@@ -880,7 +880,7 @@ void IrcClient::on_error(const IrcMessage& message)
     Iid iid;
     iid.set_local(it->first);
     iid.set_server(this->hostname);
-    iid.is_channel = true;
+    iid.type = Iid::Type::Channel;
     IrcChannel* channel = it->second.get();
     if (!channel->joined)
       continue;
@@ -908,7 +908,7 @@ void IrcClient::on_quit(const IrcMessage& message)
           Iid iid;
           iid.set_local(chan_name);
           iid.set_server(this->hostname);
-          iid.is_channel = true;
+          iid.type = Iid::Type::Channel;
           this->bridge.send_muc_leave(std::move(iid), std::move(nick), txt, false);
         }
     }
@@ -928,7 +928,7 @@ void IrcClient::on_nick(const IrcMessage& message)
           Iid iid;
           iid.set_local(chan_name);
           iid.set_server(this->hostname);
-          iid.is_channel = true;
+          iid.type = Iid::Type::Channel;
           const bool self = channel->get_self()->nick == old_nick;
           const char user_mode = user->get_most_significant_mode(this->sorted_user_modes);
           this->bridge.send_nick_change(std::move(iid), old_nick, new_nick, user_mode, self);
@@ -956,7 +956,7 @@ void IrcClient::on_kick(const IrcMessage& message)
   Iid iid;
   iid.set_local(chan_name);
   iid.set_server(this->hostname);
-  iid.is_channel = true;
+  iid.type = Iid::Type::Channel;
   this->bridge.kick_muc_user(std::move(iid), target, reason, author.nick);
 }
 
@@ -976,7 +976,7 @@ void IrcClient::on_channel_mode(const IrcMessage& message)
   Iid iid;
   iid.set_local(message.arguments[0]);
   iid.set_server(this->hostname);
-  iid.is_channel = true;
+  iid.type = Iid::Type::Channel;
   IrcUser user(message.prefix);
   std::string mode_arguments;
   for (size_t i = 1; i < message.arguments.size(); ++i)
@@ -1105,7 +1105,7 @@ void IrcClient::leave_dummy_channel(const std::string& exit_message)
   this->dummy_channel.joined = false;
   this->dummy_channel.joining = false;
   this->dummy_channel.remove_all_users();
-  this->bridge.send_muc_leave(Iid("%"s + this->hostname), std::string(this->current_nick), exit_message, true);
+  this->bridge.send_muc_leave(Iid("%"s + this->hostname, this->chantypes), std::string(this->current_nick), exit_message, true);
 }
 
 #ifdef BOTAN_FOUND
diff --git a/src/irc/irc_client.hpp b/src/irc/irc_client.hpp
index fc3918e..fa35e65 100644
--- a/src/irc/irc_client.hpp
+++ b/src/irc/irc_client.hpp
@@ -280,8 +280,9 @@ public:
 
   const Resolver& get_resolver() const { return this->dns_resolver; }
 
-  const std::vector<char>& get_sorted_user_modes() const { return sorted_user_modes; }
+  const std::vector<char>& get_sorted_user_modes() const { return this->sorted_user_modes; }
 
+  std::set<char> get_chantypes() const { return this->chantypes; }
 private:
   /**
    * The hostname of the server we are connected to.