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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Db
  * @subpackage Adapter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 
 /**
  * @see Zend_Db_Adapter_Abstract
  */
 // require_once 'Zend/Db/Adapter/Abstract.php';
 
 /**
  * @see Zend_Db_Profiler
  */
 // require_once 'Zend/Db/Profiler.php';
 
 /**
  * @see Zend_Db_Select
  */
 // require_once 'Zend/Db/Select.php';
 
 /**
  * @see Zend_Db_Statement_Mysqli
  */
 // require_once 'Zend/Db/Statement/Mysqli.php';
 
 
 /**
  * @category   Zend
  * @package    Zend_Db
  * @subpackage Adapter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Db_Adapter_Mysqli extends Zend_Db_Adapter_Abstract
 {
 
     /**
      * Keys are UPPERCASE SQL datatypes or the constants
      * Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE.
      *
      * Values are:
      * 0 = 32-bit integer
      * 1 = 64-bit integer
      * 2 = float or decimal
      *
      * @var array Associative array of datatypes to values 0, 1, or 2.
      */
     protected $_numericDataTypes = array(
         Zend_Db::INT_TYPE    => Zend_Db::INT_TYPE,
         Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE,
         Zend_Db::FLOAT_TYPE  => Zend_Db::FLOAT_TYPE,
         'INT'                => Zend_Db::INT_TYPE,
         'INTEGER'            => Zend_Db::INT_TYPE,
         'MEDIUMINT'          => Zend_Db::INT_TYPE,
         'SMALLINT'           => Zend_Db::INT_TYPE,
         'TINYINT'            => Zend_Db::INT_TYPE,
         'BIGINT'             => Zend_Db::BIGINT_TYPE,
         'SERIAL'             => Zend_Db::BIGINT_TYPE,
         'DEC'                => Zend_Db::FLOAT_TYPE,
         'DECIMAL'            => Zend_Db::FLOAT_TYPE,
         'DOUBLE'             => Zend_Db::FLOAT_TYPE,
         'DOUBLE PRECISION'   => Zend_Db::FLOAT_TYPE,
         'FIXED'              => Zend_Db::FLOAT_TYPE,
         'FLOAT'              => Zend_Db::FLOAT_TYPE
     );
 
     /**
      * @var Zend_Db_Statement_Mysqli
      */
     protected $_stmt = null;
 
     /**
      * Default class name for a DB statement.
      *
      * @var string
      */
     protected $_defaultStmtClass = 'Zend_Db_Statement_Mysqli';
 
     /**
      * Quote a raw string.
      *
      * @param mixed $value Raw string
      *
      * @return string           Quoted string
      */
     protected function _quote($value)
     {
         if (is_int($value) || is_float($value)) {
             return $value;
         }
         $this->_connect();
         return "'" . $this->_connection->real_escape_string($value) . "'";
     }
 
     /**
      * Returns the symbol the adapter uses for delimiting identifiers.
      *
      * @return string
      */
     public function getQuoteIdentifierSymbol()
     {
         return "`";
     }
 
     /**
      * Returns a list of the tables in the database.
      *
      * @return array
      */
     public function listTables()
     {
         $result = array();
         // Use mysqli extension API, because SHOW doesn't work
         // well as a prepared statement on MySQL 4.1.
         $sql = 'SHOW TABLES';
         if ($queryResult = $this->getConnection()->query($sql)) {
             while ($row = $queryResult->fetch_row()) {
                 $result[] = $row[0];
             }
             $queryResult->close();
         } else {
             /**
              * @see Zend_Db_Adapter_Mysqli_Exception
              */
             // require_once 'Zend/Db/Adapter/Mysqli/Exception.php';
             throw new Zend_Db_Adapter_Mysqli_Exception($this->getConnection()->error);
         }
         return $result;
     }
 
     /**
      * Returns the column descriptions for a table.
      *
      * The return value is an associative array keyed by the column name,
      * as returned by the RDBMS.
      *
      * The value of each array element is an associative array
      * with the following keys:
      *
      * SCHEMA_NAME      => string; name of database or schema
      * TABLE_NAME       => string;
      * COLUMN_NAME      => string; column name
      * COLUMN_POSITION  => number; ordinal position of column in table
      * DATA_TYPE        => string; SQL datatype name of column
      * DEFAULT          => string; default expression of column, null if none
      * NULLABLE         => boolean; true if column can have nulls
      * LENGTH           => number; length of CHAR/VARCHAR
      * SCALE            => number; scale of NUMERIC/DECIMAL
      * PRECISION        => number; precision of NUMERIC/DECIMAL
      * UNSIGNED         => boolean; unsigned property of an integer type
      * PRIMARY          => boolean; true if column is part of the primary key
      * PRIMARY_POSITION => integer; position of column in primary key
      * IDENTITY         => integer; true if column is auto-generated with unique values
      *
      * @param string $tableName
      * @param string $schemaName OPTIONAL
      * @return array
      */
     public function describeTable($tableName, $schemaName = null)
     {
         /**
          * @todo  use INFORMATION_SCHEMA someday when
          * MySQL's implementation isn't too slow.
          */
 
         if ($schemaName) {
             $sql = 'DESCRIBE ' . $this->quoteIdentifier("$schemaName.$tableName", true);
         } else {
             $sql = 'DESCRIBE ' . $this->quoteIdentifier($tableName, true);
         }
 
         /**
          * Use mysqli extension API, because DESCRIBE doesn't work
          * well as a prepared statement on MySQL 4.1.
          */
         if ($queryResult = $this->getConnection()->query($sql)) {
             while ($row = $queryResult->fetch_assoc()) {
                 $result[] = $row;
             }
             $queryResult->close();
         } else {
             /**
              * @see Zend_Db_Adapter_Mysqli_Exception
              */
             // require_once 'Zend/Db/Adapter/Mysqli/Exception.php';
             throw new Zend_Db_Adapter_Mysqli_Exception($this->getConnection()->error);
         }
 
         $desc = array();
 
         $row_defaults = array(
             'Length'          => null,
             'Scale'           => null,
             'Precision'       => null,
             'Unsigned'        => null,
             'Primary'         => false,
             'PrimaryPosition' => null,
             'Identity'        => false
         );
         $i = 1;
         $p = 1;
         foreach ($result as $key => $row) {
             $row = array_merge($row_defaults, $row);
             if (preg_match('/unsigned/', $row['Type'])) {
                 $row['Unsigned'] = true;
             }
             if (preg_match('/^((?:var)?char)\((\d+)\)/', $row['Type'], $matches)) {
                 $row['Type'] = $matches[1];
                 $row['Length'] = $matches[2];
             } else if (preg_match('/^decimal\((\d+),(\d+)\)/', $row['Type'], $matches)) {
                 $row['Type'] = 'decimal';
                 $row['Precision'] = $matches[1];
                 $row['Scale'] = $matches[2];
             } else if (preg_match('/^float\((\d+),(\d+)\)/', $row['Type'], $matches)) {
                 $row['Type'] = 'float';
                 $row['Precision'] = $matches[1];
                 $row['Scale'] = $matches[2];
             } else if (preg_match('/^((?:big|medium|small|tiny)?int)\((\d+)\)/', $row['Type'], $matches)) {
                 $row['Type'] = $matches[1];
                 /**
                  * The optional argument of a MySQL int type is not precision
                  * or length; it is only a hint for display width.
                  */
             }
             if (strtoupper($row['Key']) == 'PRI') {
                 $row['Primary'] = true;
                 $row['PrimaryPosition'] = $p;
                 if ($row['Extra'] == 'auto_increment') {
                     $row['Identity'] = true;
                 } else {
                     $row['Identity'] = false;
                 }
                 ++$p;
             }
             $desc[$this->foldCase($row['Field'])] = array(
                 'SCHEMA_NAME'      => null, // @todo
                 'TABLE_NAME'       => $this->foldCase($tableName),
                 'COLUMN_NAME'      => $this->foldCase($row['Field']),
                 'COLUMN_POSITION'  => $i,
                 'DATA_TYPE'        => $row['Type'],
                 'DEFAULT'          => $row['Default'],
                 'NULLABLE'         => (bool) ($row['Null'] == 'YES'),
                 'LENGTH'           => $row['Length'],
                 'SCALE'            => $row['Scale'],
                 'PRECISION'        => $row['Precision'],
                 'UNSIGNED'         => $row['Unsigned'],
                 'PRIMARY'          => $row['Primary'],
                 'PRIMARY_POSITION' => $row['PrimaryPosition'],
                 'IDENTITY'         => $row['Identity']
             );
             ++$i;
         }
         return $desc;
     }
 
     /**
      * Creates a connection to the database.
      *
      * @return void
      * @throws Zend_Db_Adapter_Mysqli_Exception
      */
     protected function _connect()
     {
         if ($this->_connection) {
             return;
         }
 
         if (!extension_loaded('mysqli')) {
             /**
              * @see Zend_Db_Adapter_Mysqli_Exception
              */
             // require_once 'Zend/Db/Adapter/Mysqli/Exception.php';
             throw new Zend_Db_Adapter_Mysqli_Exception('The Mysqli extension is required for this adapter but the extension is not loaded');
         }
 
         if (isset($this->_config['port'])) {
             $port = (integer) $this->_config['port'];
         } else {
             $port = null;
         }
 
         if (isset($this->_config['socket'])) {
             $socket = $this->_config['socket'];
         } else {
             $socket = null;
         }
 
         $this->_connection = mysqli_init();
 
         if(!empty($this->_config['driver_options'])) {
             foreach($this->_config['driver_options'] as $option=>$value) {
                 if(is_string($option)) {
                     // Suppress warnings here
                     // Ignore it if it's not a valid constant
                     $option = @constant(strtoupper($option));
                     if($option === null)
                         continue;
                 }
                 mysqli_options($this->_connection, $option, $value);
             }
         }
 
         // Suppress connection warnings here.
         // Throw an exception instead.
         $_isConnected = @mysqli_real_connect(
             $this->_connection,
             $this->_config['host'],
             $this->_config['username'],
             $this->_config['password'],
             $this->_config['dbname'],
             $port,
             $socket
         );
 
         if ($_isConnected === false || mysqli_connect_errno()) {
 
             $this->closeConnection();
             /**
              * @see Zend_Db_Adapter_Mysqli_Exception
              */
             // require_once 'Zend/Db/Adapter/Mysqli/Exception.php';
             throw new Zend_Db_Adapter_Mysqli_Exception(mysqli_connect_error());
         }
 
         if (!empty($this->_config['charset'])) {
             mysqli_set_charset($this->_connection, $this->_config['charset']);
         }
     }
 
     /**
      * Test if a connection is active
      *
      * @return boolean
      */
     public function isConnected()
     {
         return ((bool) ($this->_connection instanceof mysqli));
     }
 
     /**
      * Force the connection to close.
      *
      * @return void
      */
     public function closeConnection()
     {
         if ($this->isConnected()) {
             $this->_connection->close();
         }
         $this->_connection = null;
     }
 
     /**
      * Prepare a statement and return a PDOStatement-like object.
      *
      * @param  string  $sql  SQL query
      * @return Zend_Db_Statement_Mysqli
      */
     public function prepare($sql)
     {
         $this->_connect();
         if ($this->_stmt) {
             $this->_stmt->close();
         }
         $stmtClass = $this->_defaultStmtClass;
         if (!class_exists($stmtClass)) {
             // require_once 'Zend/Loader.php';
             Zend_Loader::loadClass($stmtClass);
         }
         $stmt = new $stmtClass($this, $sql);
         if ($stmt === false) {
             return false;
         }
         $stmt->setFetchMode($this->_fetchMode);
         $this->_stmt = $stmt;
         return $stmt;
     }
 
     /**
      * Gets the last ID generated automatically by an IDENTITY/AUTOINCREMENT column.
      *
      * As a convention, on RDBMS brands that support sequences
      * (e.g. Oracle, PostgreSQL, DB2), this method forms the name of a sequence
      * from the arguments and returns the last id generated by that sequence.
      * On RDBMS brands that support IDENTITY/AUTOINCREMENT columns, this method
      * returns the last value generated for such a column, and the table name
      * argument is disregarded.
      *
      * MySQL does not support sequences, so $tableName and $primaryKey are ignored.
      *
      * @param string $tableName   OPTIONAL Name of table.
      * @param string $primaryKey  OPTIONAL Name of primary key column.
      * @return string
      * @todo Return value should be int?
      */
     public function lastInsertId($tableName = null, $primaryKey = null)
     {
         $mysqli = $this->_connection;
         return (string) $mysqli->insert_id;
     }
 
     /**
      * Begin a transaction.
      *
      * @return void
      */
     protected function _beginTransaction()
     {
         $this->_connect();
         $this->_connection->autocommit(false);
     }
 
     /**
      * Commit a transaction.
      *
      * @return void
      */
     protected function _commit()
     {
         $this->_connect();
         $this->_connection->commit();
         $this->_connection->autocommit(true);
     }
 
     /**
      * Roll-back a transaction.
      *
      * @return void
      */
     protected function _rollBack()
     {
         $this->_connect();
         $this->_connection->rollback();
         $this->_connection->autocommit(true);
     }
 
     /**
      * Set the fetch mode.
      *
      * @param int $mode
      * @return void
      * @throws Zend_Db_Adapter_Mysqli_Exception
      */
     public function setFetchMode($mode)
     {
         switch ($mode) {
             case Zend_Db::FETCH_LAZY:
             case Zend_Db::FETCH_ASSOC:
             case Zend_Db::FETCH_NUM:
             case Zend_Db::FETCH_BOTH:
             case Zend_Db::FETCH_NAMED:
             case Zend_Db::FETCH_OBJ:
                 $this->_fetchMode = $mode;
                 break;
             case Zend_Db::FETCH_BOUND: // bound to PHP variable
                 /**
                  * @see Zend_Db_Adapter_Mysqli_Exception
                  */
                 // require_once 'Zend/Db/Adapter/Mysqli/Exception.php';
                 throw new Zend_Db_Adapter_Mysqli_Exception('FETCH_BOUND is not supported yet');
                 break;
             default:
                 /**
                  * @see Zend_Db_Adapter_Mysqli_Exception
                  */
                 // require_once 'Zend/Db/Adapter/Mysqli/Exception.php';
                 throw new Zend_Db_Adapter_Mysqli_Exception("Invalid fetch mode '$mode' specified");
         }
     }
 
     /**
      * Adds an adapter-specific LIMIT clause to the SELECT statement.
      *
      * @param string $sql
      * @param int $count
      * @param int $offset OPTIONAL
      * @return string
      */
     public function limit($sql, $count, $offset = 0)
     {
         $count = intval($count);
         if ($count <= 0) {
             /**
              * @see Zend_Db_Adapter_Mysqli_Exception
              */
             // require_once 'Zend/Db/Adapter/Mysqli/Exception.php';
             throw new Zend_Db_Adapter_Mysqli_Exception("LIMIT argument count=$count is not valid");
         }
 
         $offset = intval($offset);
         if ($offset < 0) {
             /**
              * @see Zend_Db_Adapter_Mysqli_Exception
              */
             // require_once 'Zend/Db/Adapter/Mysqli/Exception.php';
             throw new Zend_Db_Adapter_Mysqli_Exception("LIMIT argument offset=$offset is not valid");
         }
 
         $sql .= " LIMIT $count";
         if ($offset > 0) {
             $sql .= " OFFSET $offset";
         }
 
         return $sql;
     }
 
     /**
      * Check if the adapter supports real SQL parameters.
      *
      * @param string $type 'positional' or 'named'
      * @return bool
      */
     public function supportsParameters($type)
     {
         switch ($type) {
             case 'positional':
                 return true;
             case 'named':
             default:
                 return false;
         }
     }
 
     /**
      * Retrieve server version in PHP style
      *
      *@return string
      */
     public function getServerVersion()
     {
         $this->_connect();
         $version = $this->_connection->server_version;
         $major = (int) ($version / 10000);
         $minor = (int) ($version % 10000 / 100);
         $revision = (int) ($version % 100);
         return $major . '.' . $minor . '.' . $revision;
     }
 }