Logging

The TeamSpeak 3 Client Lib offers basic logging functions:

`unsigned int ts3client_logMessage(`	`logMessage`,
	`severity`,
	`channel`,
	`logID)`;

const char* logMessage;
LogLevel severity;
const char* channel;
uint64 logID;

logMessage
Text written to log.

severity

The level of the message, warning or error. Defined by the enum LogLevel in clientlib_publicdefinitions.h:

enum LogLevel {
    LogLevel_CRITICAL = 0, //these messages stop the program
    LogLevel_ERROR,        //everything that is really bad, but not so bad we need to shut down
    LogLevel_WARNING,      //everything that *might* be bad
    LogLevel_DEBUG,        //output that might help find a problem
    LogLevel_INFO,         //informational output, like "starting database version x.y.z"
    LogLevel_DEVEL         //developer only output (will not be displayed in release mode)
};

channel
Custom text to categorize the message channel (i.e. "Client", "Sound").
Pass an empty string if unused.
logID
Server connection handler ID to identify the current server connection when using multiple connections.
Pass 0 if unused.

All strings need to be encoded in UTF-8 format.

Returns ERROR_ok on success, otherwise an error code as defined in public_errors.h.

Log messages can be printed to stdout, logged to a file logs/ts3client_[date]__[time].log and sent to user-defined callbacks. The log output behaviour is defined when initialzing the client library with ts3client_initClientLib.

Unless user-defined logging is used, program execution will halt on a log message with severity LogLevel_CRITICAL.

User-defined logging

If user-defined logging was enabled when initialzing the Client Lib by passing LogType_USERLOGGING to the usedLogTypes parameter of ts3client_initClientLib, log messages will be sent to the following callback, which allows user customizable logging and handling or critical errors:

`void onUserLoggingMessageEvent(`	`logMessage`,
	`logLevel`,
	`logChannel`,
	`logID`,
	`logTime`,
	`completeLogString)`;

const char* logMessage;
int logLevel;
const char* logChannel;
uint64 logID;
const char* logTime;
const char* completeLogString;

Most callback parameters reflect the arguments passed to the logMessage function.

logMessage
Actual log message text.
logLevel
Severity of log message, defined by the enum LogLevel. Note that only log messages of a level higher than the one configured with ts3client_setLogVerbosity will appear.
logChannel
Optional custom text to categorize the message channel.
logID
Server connection handler ID identifying the current server connection when using multiple connections.
logTime
String with date and time when the log message occured.
completeLogString
Provides a verbose log message including all previous parameters for convinience.

The severity of log messages that are passed to above callback can be configured with:

unsigned int ts3client_setLogVerbosity( logVerbosity);

enum LogLevel logVerbosity;

logVerbosity
Only messages with a log level equal or higher than logVerbosity will be sent to the callback. The default value is LogLevel_DEVEL.
For example, after calling
```
ts3client_setLogVerbosity(LogLevel_ERROR);
```
only log messages of level LogLevel_ERROR and LogLevel_CRITICAL will be passed to onUserLoggingMessageEvent.

Returns ERROR_ok on success, otherwise an error code as defined in public_errors.h.


Error handling		Using playback and capture modes and devices