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moodle/lib/phpexcel/PHPExcel/Calculation/Database.php

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<?php
/** PHPExcel root directory */
if (!defined('PHPEXCEL_ROOT')) {
/**
* @ignore
*/
define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../');
require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
}
/**
* PHPExcel_Calculation_Database
*
* Copyright (c) 2006 - 2015 PHPExcel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPExcel
* @package PHPExcel_Calculation
* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version ##VERSION##, ##DATE##
*/
class PHPExcel_Calculation_Database
{
/**
* fieldExtract
*
* Extracts the column ID to use for the data field.
*
* @access private
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param mixed $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @return string|NULL
*
*/
private static function fieldExtract($database, $field)
{
$field = strtoupper(PHPExcel_Calculation_Functions::flattenSingleValue($field));
$fieldNames = array_map('strtoupper', array_shift($database));
if (is_numeric($field)) {
$keys = array_keys($fieldNames);
return $keys[$field-1];
}
$key = array_search($field, $fieldNames);
return ($key) ? $key : null;
}
/**
* filter
*
* Parses the selection criteria, extracts the database rows that match those criteria, and
* returns that subset of rows.
*
* @access private
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return array of mixed
*
*/
private static function filter($database, $criteria)
{
$fieldNames = array_shift($database);
$criteriaNames = array_shift($criteria);
// Convert the criteria into a set of AND/OR conditions with [:placeholders]
$testConditions = $testValues = array();
$testConditionsCount = 0;
foreach ($criteriaNames as $key => $criteriaName) {
$testCondition = array();
$testConditionCount = 0;
foreach ($criteria as $row => $criterion) {
if ($criterion[$key] > '') {
$testCondition[] = '[:'.$criteriaName.']'.PHPExcel_Calculation_Functions::ifCondition($criterion[$key]);
$testConditionCount++;
}
}
if ($testConditionCount > 1) {
$testConditions[] = 'OR(' . implode(',', $testCondition) . ')';
$testConditionsCount++;
} elseif ($testConditionCount == 1) {
$testConditions[] = $testCondition[0];
$testConditionsCount++;
}
}
if ($testConditionsCount > 1) {
$testConditionSet = 'AND(' . implode(',', $testConditions) . ')';
} elseif ($testConditionsCount == 1) {
$testConditionSet = $testConditions[0];
}
// Loop through each row of the database
foreach ($database as $dataRow => $dataValues) {
// Substitute actual values from the database row for our [:placeholders]
$testConditionList = $testConditionSet;
foreach ($criteriaNames as $key => $criteriaName) {
$k = array_search($criteriaName, $fieldNames);
if (isset($dataValues[$k])) {
$dataValue = $dataValues[$k];
$dataValue = (is_string($dataValue)) ? PHPExcel_Calculation::wrapResult(strtoupper($dataValue)) : $dataValue;
$testConditionList = str_replace('[:' . $criteriaName . ']', $dataValue, $testConditionList);
}
}
// evaluate the criteria against the row data
$result = PHPExcel_Calculation::getInstance()->_calculateFormulaValue('='.$testConditionList);
// If the row failed to meet the criteria, remove it from the database
if (!$result) {
unset($database[$dataRow]);
}
}
return $database;
}
private static function getFilteredColumn($database, $field, $criteria)
{
// reduce the database to a set of rows that match all the criteria
$database = self::filter($database, $criteria);
// extract an array of values for the requested column
$colData = array();
foreach ($database as $row) {
$colData[] = $row[$field];
}
return $colData;
}
/**
* DAVERAGE
*
* Averages the values in a column of a list or database that match conditions you specify.
*
* Excel Function:
* DAVERAGE(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return float
*
*/
public static function DAVERAGE($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_Statistical::AVERAGE(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DCOUNT
*
* Counts the cells that contain numbers in a column of a list or database that match conditions
* that you specify.
*
* Excel Function:
* DCOUNT(database,[field],criteria)
*
* Excel Function:
* DAVERAGE(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return integer
*
* @TODO The field argument is optional. If field is omitted, DCOUNT counts all records in the
* database that match the criteria.
*
*/
public static function DCOUNT($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_Statistical::COUNT(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DCOUNTA
*
* Counts the nonblank cells in a column of a list or database that match conditions that you specify.
*
* Excel Function:
* DCOUNTA(database,[field],criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return integer
*
* @TODO The field argument is optional. If field is omitted, DCOUNTA counts all records in the
* database that match the criteria.
*
*/
public static function DCOUNTA($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// reduce the database to a set of rows that match all the criteria
$database = self::filter($database, $criteria);
// extract an array of values for the requested column
$colData = array();
foreach ($database as $row) {
$colData[] = $row[$field];
}
// Return
return PHPExcel_Calculation_Statistical::COUNTA(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DGET
*
* Extracts a single value from a column of a list or database that matches conditions that you
* specify.
*
* Excel Function:
* DGET(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return mixed
*
*/
public static function DGET($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
$colData = self::getFilteredColumn($database, $field, $criteria);
if (count($colData) > 1) {
return PHPExcel_Calculation_Functions::NaN();
}
return $colData[0];
}
/**
* DMAX
*
* Returns the largest number in a column of a list or database that matches conditions you that
* specify.
*
* Excel Function:
* DMAX(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return float
*
*/
public static function DMAX($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_Statistical::MAX(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DMIN
*
* Returns the smallest number in a column of a list or database that matches conditions you that
* specify.
*
* Excel Function:
* DMIN(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return float
*
*/
public static function DMIN($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_Statistical::MIN(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DPRODUCT
*
* Multiplies the values in a column of a list or database that match conditions that you specify.
*
* Excel Function:
* DPRODUCT(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return float
*
*/
public static function DPRODUCT($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_MathTrig::PRODUCT(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DSTDEV
*
* Estimates the standard deviation of a population based on a sample by using the numbers in a
* column of a list or database that match conditions that you specify.
*
* Excel Function:
* DSTDEV(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return float
*
*/
public static function DSTDEV($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_Statistical::STDEV(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DSTDEVP
*
* Calculates the standard deviation of a population based on the entire population by using the
* numbers in a column of a list or database that match conditions that you specify.
*
* Excel Function:
* DSTDEVP(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return float
*
*/
public static function DSTDEVP($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_Statistical::STDEVP(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DSUM
*
* Adds the numbers in a column of a list or database that match conditions that you specify.
*
* Excel Function:
* DSUM(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return float
*
*/
public static function DSUM($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_MathTrig::SUM(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DVAR
*
* Estimates the variance of a population based on a sample by using the numbers in a column
* of a list or database that match conditions that you specify.
*
* Excel Function:
* DVAR(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return float
*
*/
public static function DVAR($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_Statistical::VARFunc(
self::getFilteredColumn($database, $field, $criteria)
);
}
/**
* DVARP
*
* Calculates the variance of a population based on the entire population by using the numbers
* in a column of a list or database that match conditions that you specify.
*
* Excel Function:
* DVARP(database,field,criteria)
*
* @access public
* @category Database Functions
* @param mixed[] $database The range of cells that makes up the list or database.
* A database is a list of related data in which rows of related
* information are records, and columns of data are fields. The
* first row of the list contains labels for each column.
* @param string|integer $field Indicates which column is used in the function. Enter the
* column label enclosed between double quotation marks, such as
* "Age" or "Yield," or a number (without quotation marks) that
* represents the position of the column within the list: 1 for
* the first column, 2 for the second column, and so on.
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
* You can use any range for the criteria argument, as long as it
* includes at least one column label and at least one cell below
* the column label in which you specify a condition for the
* column.
* @return float
*
*/
public static function DVARP($database, $field, $criteria)
{
$field = self::fieldExtract($database, $field);
if (is_null($field)) {
return null;
}
// Return
return PHPExcel_Calculation_Statistical::VARP(
self::getFilteredColumn($database, $field, $criteria)
);
}
}