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* @since Horde 1.3
* @since Log 1.0
* @package Log
*
* @example sql.php Using the SQL handler.
*/
class Log_sql extends Log
{
/**
* Variable containing the DSN information.
*/
private mixed $dsn = '';
/**
* String containing the SQL insertion statement.
*/
private string $sql = '';
/**
* Array containing our set of DB configuration options.
*/
private array $options = ['persistent' => true];
/**
* Object holding the database handle.
*/
private ?object $db = null;
/**
* Resource holding the prepared statement handle.
* @var resource
*/
private $statement = null;
/**
* Flag indicating that we're using an existing database connection.
*/
private bool $existingConnection = false;
/**
* String holding the database table to use.
*/
private string $table = 'log_table';
/**
* String holding the name of the ID sequence.
*/
private string $sequence = 'log_id';
/**
* Maximum length of the $ident string. This corresponds to the size of
* the 'ident' column in the SQL table.
*/
private int $identLimit = 16;
/**
* Constructs a new sql logging object.
*
* @param string $name The target SQL table.
* @param string $ident The identification field.
* @param array $conf The connection configuration array.
* @param int $level Log messages up to and including this level.
*/
public function __construct(
string $name,
string $ident = '',
array $conf = [],
int $level = PEAR_LOG_DEBUG
) {
$this->id = md5(microtime().random_int(0, mt_getrandmax()));
$this->table = $name;
$this->mask = Log::MAX($level);
/* Now that we have a table name, assign our SQL statement. */
if (!empty($conf['sql'])) {
$this->sql = $conf['sql'];
} else {
$this->sql = 'INSERT INTO ' . $this->table .
' (id, logtime, ident, priority, message)' .
' VALUES(?, CURRENT_TIMESTAMP, ?, ?, ?)';
}
/* If an options array was provided, use it. */
if (isset($conf['options']) && is_array($conf['options'])) {
$this->options = $conf['options'];
}
/* If a specific sequence name was provided, use it. */
if (!empty($conf['sequence'])) {
$this->sequence = $conf['sequence'];
}
/* If a specific sequence name was provided, use it. */
if (isset($conf['identLimit'])) {
$this->identLimit = $conf['identLimit'];
}
/* Now that the ident limit is confirmed, set the ident string. */
$this->setIdent($ident);
/* If an existing database connection was provided, use it. */
if (isset($conf['db'])) {
$this->db = &$conf['db'];
$this->existingConnection = true;
$this->opened = true;
} else {
$this->dsn = $conf['dsn'];
}
}
/**
* Opens a connection to the database, if it has not already
* been opened. This is implicitly called by log(), if necessary.
*
* @return boolean True on success, false on failure.
*/
public function open(): bool
{
if (!$this->opened) {
/* Use the DSN and options to create a database connection. */
$this->db = &DB::connect($this->dsn, $this->options);
if (DB::isError($this->db)) {
return false;
}
/* Create a prepared statement for repeated use in log(). */
if (!$this->prepareStatement()) {
return false;
}
/* We now consider out connection open. */
$this->opened = true;
}
return $this->opened;
}
/**
* Closes the connection to the database if it is still open and we were
* the ones that opened it. It is the caller's responsible to close an
* existing connection that was passed to us via $conf['db'].
*
* @return boolean True on success, false on failure.
*/
public function close(): bool
{
if ($this->opened && !$this->existingConnection) {
$this->opened = false;
$this->db->freePrepared($this->statement);
return $this->db->disconnect();
}
return ($this->opened === false);
}
/**
* Sets this Log instance's identification string. Note that this
* SQL-specific implementation will limit the length of the $ident string
* to sixteen (16) characters.
*
* @param string $ident The new identification string.
*
* @since Log 1.8.5
*/
public function setIdent(string $ident): void
{
$this->ident = substr($ident, 0, $this->identLimit);
}
/**
* Inserts $message to the currently open database. Calls open(),
* if necessary. Also passes the message along to any Log_observer
* instances that are observing this Log.
*
* @param mixed $message String or object containing the message to log.
* @param int|null $priority The priority of the message. Valid
* values are: PEAR_LOG_EMERG, PEAR_LOG_ALERT,
* PEAR_LOG_CRIT, PEAR_LOG_ERR, PEAR_LOG_WARNING,
* PEAR_LOG_NOTICE, PEAR_LOG_INFO, and PEAR_LOG_DEBUG.
* @return boolean True on success or false on failure.
*/
public function log($message, ?int $priority = null): bool
{
/* If a priority hasn't been specified, use the default value. */
if ($priority === null) {
$priority = $this->priority;
}
/* Abort early if the priority is above the maximum logging level. */
if (!$this->isMasked($priority)) {
return false;
}
/* If the connection isn't open and can't be opened, return failure. */
if (!$this->opened && !$this->open()) {
return false;
}
/* If we don't already have our statement object yet, create it. */
if (!is_object($this->statement) && !$this->prepareStatement()) {
return false;
}
/* Extract the string representation of the message. */
$message = $this->extractMessage($message);
/* Build our set of values for this log entry. */
$id = $this->db->nextId($this->sequence);
$values = [$id, $this->ident, $priority, $message];
/* Execute the SQL query for this log entry insertion. */
$result =& $this->db->execute($this->statement, $values);
if (DB::isError($result)) {
return false;
}
$this->announce(['priority' => $priority, 'message' => $message]);
return true;
}
/**
* Prepare the SQL insertion statement.
*
* @return boolean True if the statement was successfully created.
*
* @since Log 1.9.1
*/
private function prepareStatement(): bool
{
$this->statement = $this->db->prepare($this->sql);
/* Return success if we didn't generate an error. */
return (DB::isError($this->statement) === false);
}
}