Per-logstream loglevels.

[user/henk/code/inspircd.git] / src / logger.cpp

diff --git a/src/logger.cpp b/src/logger.cpp
index b66b34b8e3d14648990c2859493b0ccf137f4328..03c02fe09f9659a052e83260076229c19edf26f0 100644 (file)
--- a/src/logger.cpp
+++ b/src/logger.cpp
@@ -15,3 +15,160 @@
 
 #include "inspircd.h"
 
+/*
+ * Suggested implementation...
+ *     class LogManager
+ *             bool AddLogType(const std::string &type, enum loglevel, LogStream *)
+ *             bool DelLogType(const std::string &type, LogStream *)
+ *             Log(const std::string &type, enum loglevel, const std::string &msg)
+ *             std::map<std::string, std::vector<LogStream *> > logstreams (holds a 'chain' of logstreams for each type that are all notified when a log happens)
+ *
+ *  class LogStream
+ *             std::string type
+ *      virtual void OnLog(enum loglevel, const std::string &msg)
+ *
+ * How it works:
+ *  Modules create their own logstream types (core will create one for 'file logging' for example) and create instances of these logstream types
+ *  and register interest in a certain logtype. Globbing is not here, with the exception of * - for all events.. loglevel is used to drop 
+ *  events that are of no interest to a logstream.
+ *
+ *  When Log is called, the vector of logstreams for that type is iterated (along with the special vector for "*"), and all registered logstreams
+ *  are called back ("OnLog" or whatever) to do whatever they like with the message. In the case of the core, this will write to a file.
+ *  In the case of the module I plan to write (m_logtochannel or something), it will log to the channel(s) for that logstream, etc.
+ *
+ * NOTE: Somehow we have to let LogManager manage the non-blocking file streams and provide an interface to share them with various LogStreams,
+ *       as, for example, a user may want to let 'KILL' and 'XLINE' snotices go to /home/ircd/inspircd/logs/operactions.log, or whatever. How
+ *       can we accomplish this easily? I guess with a map of pre-loved logpaths, and a pointer of FILE *..
+ * 
+ */
+
+void LogManager::CloseLogs()
+{
+       /*
+        * This doesn't remove logstreams from the map/vector etc, because if this is called, shit is hitting the fan
+        * and we're going down anyway - this just provides a "nice" way for logstreams to clean up. -- w
+        */
+       std::map<std::string, std::vector<LogStream *> >::iterator i;
+
+       while (LogStreams.begin() != LogStreams.end())
+       {
+               i = LogStreams.begin();
+
+               while (i->second.begin() != i->second.end())
+               {
+                       std::vector<LogStream *>::iterator it = i->second.begin();
+
+                       delete (*it);
+                       i->second.erase(it);
+               }
+
+               LogStreams.erase(i);
+       }
+}
+
+bool LogManager::AddLogType(const std::string &type, LogStream *l)
+{
+       std::map<std::string, std::vector<LogStream *> >::iterator i = LogStreams.find(type);
+
+       if (i != LogStreams.end())
+               i->second.push_back(l);
+       else
+       {
+               std::vector<LogStream *> v;
+               v.push_back(l);
+               LogStreams[type] = v;
+       }
+
+       if (type == "*")
+               GlobalLogStreams.push_back(l);
+
+       return true;
+}
+
+bool LogManager::DelLogType(const std::string &type, LogStream *l)
+{
+       std::map<std::string, std::vector<LogStream *> >::iterator i = LogStreams.find(type);
+       std::vector<LogStream *>::iterator gi = GlobalLogStreams.begin();
+
+       while (gi != GlobalLogStreams.end())
+       {
+               if ((*gi) == l)
+               {
+                       GlobalLogStreams.erase(gi);
+                       break;
+               }
+       }
+
+       if (i != LogStreams.end())
+       {
+               std::vector<LogStream *>::iterator it = i->second.begin();
+
+               while (it != i->second.end())
+               {
+                       if (*it == l)
+                       {
+                               i->second.erase(it);
+
+                               if (i->second.size() == 0)
+                               {
+                                       LogStreams.erase(i);
+                               }
+
+                               delete l;
+                               return true;
+                       }
+
+                       it++;
+               }
+       }
+
+       return false;
+}
+
+void LogManager::Log(const std::string &type, int loglevel, const char *fmt, ...)
+{
+       if (Logging)
+               return;
+
+       va_list a;
+       static char buf[65536];
+
+       va_start(a, fmt);
+       vsnprintf(buf, 65536, fmt, a);
+       va_end(a);
+
+       this->Log(type, loglevel, std::string(buf));
+}
+
+void LogManager::Log(const std::string &type, int loglevel, const std::string &msg)
+{
+       if (Logging)
+               return;
+
+       Logging = true;
+
+       std::vector<LogStream *>::iterator gi = GlobalLogStreams.begin();
+
+       while (gi != GlobalLogStreams.end())
+       {
+               (*gi)->OnLog(loglevel, type, msg);
+               gi++;
+       }
+
+       std::map<std::string, std::vector<LogStream *> >::iterator i = LogStreams.find(type);
+
+       if (i != LogStreams.end())
+       {
+               std::vector<LogStream *>::iterator it = i->second.begin();
+
+               while (it != i->second.end())
+               {
+                       (*it)->OnLog(loglevel, type, msg);
+                       it++;
+               }
+       }
+
+       Logging = false;
+}
+
+