Core: Implement Role based Access Control

- This system will give more control of actions an account can perform.

System defines:
- Permissions to perform some action
- Roles: a set of permissions that have some relation
- Groups: a set of roles that have some relation

Operations:
- Grant: Assign and allow
- Deny: Assign and do not allow
- Revoke: Remove

Precedence to know if something can be done: Grant, Deny. That means, if you are granted some action by a role but you have denied the permission, the action can not be done.

Some Rules:
- Groups can only have roles
- Roles can only have permissions
- An account can be assigned granted and denied roles. Permissions inherited from roles are granted if roles is granted and denied if roles is denied
- An account can be assigned granted and denied permissions
- An account can have multiple groups, roles and permissions
- An account can not have same role granted and denied at same time
- An acconnt can not have same permission granted and denied at same time
- Id 0 can not be used to define a group, role or permission

Added some permissions as a sample of use (Instant Logout, Skip Queue, Join BGs, Join DF) and some permissions as a workaround to commands till command system is modified to use RBAC

src/server/game/Server/WorldSession.cpp

@@ -21,6 +21,7 @@
 */
 
 #include "WorldSocket.h"                                    // must be first to make ACE happy with ACE includes in it
+#include "Config.h"
 #include "Common.h"
 #include "DatabaseEnv.h"
 #include "Log.h"
@@ -115,7 +116,8 @@ WorldSession::WorldSession(uint32 id, WorldSocket* sock, AccountTypes sec, uint8
     m_TutorialsChanged(false),
     recruiterId(recruiter),
     isRecruiter(isARecruiter),
-    timeLastWhoCommand(0)
+    timeLastWhoCommand(0),
+    _RBACData(NULL)
 {
     if (sock)
     {
@@ -143,8 +145,8 @@ WorldSession::~WorldSession()
         m_Socket = NULL;
     }
 
-    if (_warden)
-        delete _warden;
+    delete _warden;
+    delete _RBACData;
 
     ///- empty incoming packet queue
     WorldPacket* packet = NULL;
@@ -1200,3 +1202,24 @@ void WorldSession::InitWarden(BigNumber* k, std::string const& os)
         // _warden->Init(this, k);
     }
 }
+
+void WorldSession::LoadPermissions()
+{
+    uint32 id = GetAccountId();
+    std::string name;
+    int32 realmId = ConfigMgr::GetIntDefault("RealmID", 0);
+    AccountMgr::GetName(id, name);
+
+    _RBACData = new RBACData(id, name, realmId);
+    _RBACData->LoadFromDB();
+}
+
+RBACData* WorldSession::GetRBACData()
+{
+    return _RBACData;
+}
+
+bool WorldSession::HasPermission(uint32 permission)
+{
+    return _RBACData->HasPermission(permission);
+}