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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 Profiler
  * @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    $Id$
  */
 
 
 /**
  * @category   Zend
  * @package    Zend_Db
  * @subpackage Profiler
  * @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_Profiler
 {
 
     /**
      * A connection operation or selecting a database.
      */
     const CONNECT = 1;
 
     /**
      * Any general database query that does not fit into the other constants.
      */
     const QUERY = 2;
 
     /**
      * Adding new data to the database, such as SQL's INSERT.
      */
     const INSERT = 4;
 
     /**
      * Updating existing information in the database, such as SQL's UPDATE.
      *
      */
     const UPDATE = 8;
 
     /**
      * An operation related to deleting data in the database,
      * such as SQL's DELETE.
      */
     const DELETE = 16;
 
     /**
      * Retrieving information from the database, such as SQL's SELECT.
      */
     const SELECT = 32;
 
     /**
      * Transactional operation, such as start transaction, commit, or rollback.
      */
     const TRANSACTION = 64;
 
     /**
      * Inform that a query is stored (in case of filtering)
      */
     const STORED = 'stored';
 
     /**
      * Inform that a query is ignored (in case of filtering)
      */
     const IGNORED = 'ignored';
 
     /**
      * Array of Zend_Db_Profiler_Query objects.
      *
      * @var array
      */
     protected $_queryProfiles = array();
 
     /**
      * Stores enabled state of the profiler.  If set to False, calls to
      * queryStart() will simply be ignored.
      *
      * @var boolean
      */
     protected $_enabled = false;
 
     /**
      * Stores the number of seconds to filter.  NULL if filtering by time is
      * disabled.  If an integer is stored here, profiles whose elapsed time
      * is less than this value in seconds will be unset from
      * the self::$_queryProfiles array.
      *
      * @var integer
      */
     protected $_filterElapsedSecs = null;
 
     /**
      * Logical OR of any of the filter constants.  NULL if filtering by query
      * type is disable.  If an integer is stored here, it is the logical OR of
      * any of the query type constants.  When the query ends, if it is not
      * one of the types specified, it will be unset from the
      * self::$_queryProfiles array.
      *
      * @var integer
      */
     protected $_filterTypes = null;
 
     /**
      * Class constructor.  The profiler is disabled by default unless it is
      * specifically enabled by passing in $enabled here or calling setEnabled().
      *
      * @param  boolean $enabled
      * @return void
      */
     public function __construct($enabled = false)
     {
         $this->setEnabled($enabled);
     }
 
     /**
      * Enable or disable the profiler.  If $enable is false, the profiler
      * is disabled and will not log any queries sent to it.
      *
      * @param  boolean $enable
      * @return Zend_Db_Profiler Provides a fluent interface
      */
     public function setEnabled($enable)
     {
         $this->_enabled = (boolean) $enable;
 
         return $this;
     }
 
     /**
      * Get the current state of enable.  If True is returned,
      * the profiler is enabled.
      *
      * @return boolean
      */
     public function getEnabled()
     {
         return $this->_enabled;
     }
 
     /**
      * Sets a minimum number of seconds for saving query profiles.  If this
      * is set, only those queries whose elapsed time is equal or greater than
      * $minimumSeconds will be saved.  To save all queries regardless of
      * elapsed time, set $minimumSeconds to null.
      *
      * @param  integer $minimumSeconds OPTIONAL
      * @return Zend_Db_Profiler Provides a fluent interface
      */
     public function setFilterElapsedSecs($minimumSeconds = null)
     {
         if (null === $minimumSeconds) {
             $this->_filterElapsedSecs = null;
         } else {
             $this->_filterElapsedSecs = (integer) $minimumSeconds;
         }
 
         return $this;
     }
 
     /**
      * Returns the minimum number of seconds for saving query profiles, or null if
      * query profiles are saved regardless of elapsed time.
      *
      * @return integer|null
      */
     public function getFilterElapsedSecs()
     {
         return $this->_filterElapsedSecs;
     }
 
     /**
      * Sets the types of query profiles to save.  Set $queryType to one of
      * the Zend_Db_Profiler::* constants to only save profiles for that type of
      * query.  To save more than one type, logical OR them together.  To
      * save all queries regardless of type, set $queryType to null.
      *
      * @param  integer $queryTypes OPTIONAL
      * @return Zend_Db_Profiler Provides a fluent interface
      */
     public function setFilterQueryType($queryTypes = null)
     {
         $this->_filterTypes = $queryTypes;
 
         return $this;
     }
 
     /**
      * Returns the types of query profiles saved, or null if queries are saved regardless
      * of their types.
      *
      * @return integer|null
      * @see    Zend_Db_Profiler::setFilterQueryType()
      */
     public function getFilterQueryType()
     {
         return $this->_filterTypes;
     }
 
     /**
      * Clears the history of any past query profiles.  This is relentless
      * and will even clear queries that were started and may not have
      * been marked as ended.
      *
      * @return Zend_Db_Profiler Provides a fluent interface
      */
     public function clear()
     {
         $this->_queryProfiles = array();
 
         return $this;
     }
 
     /**
      * Clone a profiler query
      *
      * @param  Zend_Db_Profiler_Query $query
      * @return integer or null
      */
     public function queryClone(Zend_Db_Profiler_Query $query)
     {
         $this->_queryProfiles[] = clone $query;
 
         end($this->_queryProfiles);
 
         return key($this->_queryProfiles);
     }
 
     /**
      * Starts a query.  Creates a new query profile object (Zend_Db_Profiler_Query)
      * and returns the "query profiler handle".  Run the query, then call
      * queryEnd() and pass it this handle to make the query as ended and
      * record the time.  If the profiler is not enabled, this takes no
      * action and immediately returns null.
      *
      * @param  string  $queryText   SQL statement
      * @param  integer $queryType   OPTIONAL Type of query, one of the Zend_Db_Profiler::* constants
      * @return integer|null
      */
     public function queryStart($queryText, $queryType = null)
     {
         if (!$this->_enabled) {
             return null;
         }
 
         // make sure we have a query type
         if (null === $queryType) {
             switch (strtolower(substr(ltrim($queryText), 0, 6))) {
                 case 'insert':
                     $queryType = self::INSERT;
                     break;
                 case 'update':
                     $queryType = self::UPDATE;
                     break;
                 case 'delete':
                     $queryType = self::DELETE;
                     break;
                 case 'select':
                     $queryType = self::SELECT;
                     break;
                 default:
                     $queryType = self::QUERY;
                     break;
             }
         }
 
         /**
          * @see Zend_Db_Profiler_Query
          */
         // require_once 'Zend/Db/Profiler/Query.php';
         $this->_queryProfiles[] = new Zend_Db_Profiler_Query($queryText, $queryType);
 
         end($this->_queryProfiles);
 
         return key($this->_queryProfiles);
     }
 
     /**
      * Ends a query. Pass it the handle that was returned by queryStart().
      * This will mark the query as ended and save the time.
      *
      * @param  integer $queryId
      * @throws Zend_Db_Profiler_Exception
      * @return string   Inform that a query is stored or ignored.
      */
     public function queryEnd($queryId)
     {
         // Don't do anything if the Zend_Db_Profiler is not enabled.
         if (!$this->_enabled) {
             return self::IGNORED;
         }
 
         // Check for a valid query handle.
         if (!isset($this->_queryProfiles[$queryId])) {
             /**
              * @see Zend_Db_Profiler_Exception
              */
             // require_once 'Zend/Db/Profiler/Exception.php';
             throw new Zend_Db_Profiler_Exception("Profiler has no query with handle '$queryId'.");
         }
 
         $qp = $this->_queryProfiles[$queryId];
 
         // Ensure that the query profile has not already ended
         if ($qp->hasEnded()) {
             /**
              * @see Zend_Db_Profiler_Exception
              */
             // require_once 'Zend/Db/Profiler/Exception.php';
             throw new Zend_Db_Profiler_Exception("Query with profiler handle '$queryId' has already ended.");
         }
 
         // End the query profile so that the elapsed time can be calculated.
         $qp->end();
 
         /**
          * If filtering by elapsed time is enabled, only keep the profile if
          * it ran for the minimum time.
          */
         if (null !== $this->_filterElapsedSecs && $qp->getElapsedSecs() < $this->_filterElapsedSecs) {
             unset($this->_queryProfiles[$queryId]);
             return self::IGNORED;
         }
 
         /**
          * If filtering by query type is enabled, only keep the query if
          * it was one of the allowed types.
          */
         if (null !== $this->_filterTypes && !($qp->getQueryType() & $this->_filterTypes)) {
             unset($this->_queryProfiles[$queryId]);
             return self::IGNORED;
         }
 
         return self::STORED;
     }
 
     /**
      * Get a profile for a query.  Pass it the same handle that was returned
      * by queryStart() and it will return a Zend_Db_Profiler_Query object.
      *
      * @param  integer $queryId
      * @throws Zend_Db_Profiler_Exception
      * @return Zend_Db_Profiler_Query
      */
     public function getQueryProfile($queryId)
     {
         if (!array_key_exists($queryId, $this->_queryProfiles)) {
             /**
              * @see Zend_Db_Profiler_Exception
              */
             // require_once 'Zend/Db/Profiler/Exception.php';
             throw new Zend_Db_Profiler_Exception("Query handle '$queryId' not found in profiler log.");
         }
 
         return $this->_queryProfiles[$queryId];
     }
 
     /**
      * Get an array of query profiles (Zend_Db_Profiler_Query objects).  If $queryType
      * is set to one of the Zend_Db_Profiler::* constants then only queries of that
      * type will be returned.  Normally, queries that have not yet ended will
      * not be returned unless $showUnfinished is set to True.  If no
      * queries were found, False is returned. The returned array is indexed by the query
      * profile handles.
      *
      * @param  integer $queryType
      * @param  boolean $showUnfinished
      * @return array|false
      */
     public function getQueryProfiles($queryType = null, $showUnfinished = false)
     {
         $queryProfiles = array();
         foreach ($this->_queryProfiles as $key => $qp) {
             if ($queryType === null) {
                 $condition = true;
             } else {
                 $condition = ($qp->getQueryType() & $queryType);
             }
 
             if (($qp->hasEnded() || $showUnfinished) && $condition) {
                 $queryProfiles[$key] = $qp;
             }
         }
 
         if (empty($queryProfiles)) {
             $queryProfiles = false;
         }
 
         return $queryProfiles;
     }
 
     /**
      * Get the total elapsed time (in seconds) of all of the profiled queries.
      * Only queries that have ended will be counted.  If $queryType is set to
      * one or more of the Zend_Db_Profiler::* constants, the elapsed time will be calculated
      * only for queries of the given type(s).
      *
      * @param  integer $queryType OPTIONAL
      * @return float
      */
     public function getTotalElapsedSecs($queryType = null)
     {
         $elapsedSecs = 0;
         foreach ($this->_queryProfiles as $key => $qp) {
             if (null === $queryType) {
                 $condition = true;
             } else {
                 $condition = ($qp->getQueryType() & $queryType);
             }
             if (($qp->hasEnded()) && $condition) {
                 $elapsedSecs += $qp->getElapsedSecs();
             }
         }
         return $elapsedSecs;
     }
 
     /**
      * Get the total number of queries that have been profiled.  Only queries that have ended will
      * be counted.  If $queryType is set to one of the Zend_Db_Profiler::* constants, only queries of
      * that type will be counted.
      *
      * @param  integer $queryType OPTIONAL
      * @return integer
      */
     public function getTotalNumQueries($queryType = null)
     {
         if (null === $queryType) {
             return count($this->_queryProfiles);
         }
 
         $numQueries = 0;
         foreach ($this->_queryProfiles as $qp) {
             if ($qp->hasEnded() && ($qp->getQueryType() & $queryType)) {
                 $numQueries++;
             }
         }
 
         return $numQueries;
     }
 
     /**
      * Get the Zend_Db_Profiler_Query object for the last query that was run, regardless if it has
      * ended or not.  If the query has not ended, its end time will be null.  If no queries have
      * been profiled, false is returned.
      *
      * @return Zend_Db_Profiler_Query|false
      */
     public function getLastQueryProfile()
     {
         if (empty($this->_queryProfiles)) {
             return false;
         }
 
         end($this->_queryProfiles);
 
         return current($this->_queryProfiles);
     }
 
 }