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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\Database;
use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\Internal\WildcardMatch;
abstract class DatabaseAbstract
{
abstract public static function evaluate($database, $field, $criteria);
/**
* fieldExtract.
*
* Extracts the column ID to use for the data field.
*
* @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.
*/
protected static function fieldExtract(array $database, $field): ?int
{
$field = strtoupper(Functions::flattenSingleValue($field ?? ''));
if ($field === '') {
return null;
}
$fieldNames = array_map('strtoupper', array_shift($database));
if (is_numeric($field)) {
return ((int) $field) - 1;
}
$key = array_search($field, array_values($fieldNames), true);
return ($key !== false) ? (int) $key : null;
}
/**
* filter.
*
* Parses the selection criteria, extracts the database rows that match those criteria, and
* returns that subset of rows.
*
* @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 mixed[]
*/
protected static function filter(array $database, array $criteria): array
{
$fieldNames = array_shift($database);
$criteriaNames = array_shift($criteria);
// Convert the criteria into a set of AND/OR conditions with [:placeholders]
$query = self::buildQuery($criteriaNames, $criteria);
// Loop through each row of the database
return self::executeQuery($database, $query, $criteriaNames, $fieldNames);
}
protected static function getFilteredColumn(array $database, ?int $field, array $criteria): array
{
// reduce the database to a set of rows that match all the criteria
$database = self::filter($database, $criteria);
$defaultReturnColumnValue = ($field === null) ? 1 : null;
// extract an array of values for the requested column
$columnData = [];
foreach ($database as $rowKey => $row) {
$keys = array_keys($row);
$key = $keys[$field] ?? null;
$columnKey = $key ?? 'A';
$columnData[$rowKey][$columnKey] = $row[$key] ?? $defaultReturnColumnValue;
}
return $columnData;
}
private static function buildQuery(array $criteriaNames, array $criteria): string
{
$baseQuery = [];
foreach ($criteria as $key => $criterion) {
foreach ($criterion as $field => $value) {
$criterionName = $criteriaNames[$field];
if ($value !== null) {
$condition = self::buildCondition($value, $criterionName);
$baseQuery[$key][] = $condition;
}
}
}
$rowQuery = array_map(
function ($rowValue) {
return (count($rowValue) > 1) ? 'AND(' . implode(',', $rowValue) . ')' : ($rowValue[0] ?? '');
},
$baseQuery
);
return (count($rowQuery) > 1) ? 'OR(' . implode(',', $rowQuery) . ')' : ($rowQuery[0] ?? '');
}
private static function buildCondition($criterion, string $criterionName): string
{
$ifCondition = Functions::ifCondition($criterion);
// Check for wildcard characters used in the condition
$result = preg_match('/(?<operator>[^"]*)(?<operand>".*[*?].*")/ui', $ifCondition, $matches);
if ($result !== 1) {
return "[:{$criterionName}]{$ifCondition}";
}
$trueFalse = ($matches['operator'] !== '<>');
$wildcard = WildcardMatch::wildcard($matches['operand']);
$condition = "WILDCARDMATCH([:{$criterionName}],{$wildcard})";
if ($trueFalse === false) {
$condition = "NOT({$condition})";
}
return $condition;
}
private static function executeQuery(array $database, string $query, array $criteria, array $fields): array
{
foreach ($database as $dataRow => $dataValues) {
// Substitute actual values from the database row for our [:placeholders]
$conditions = $query;
foreach ($criteria as $criterion) {
$conditions = self::processCondition($criterion, $fields, $dataValues, $conditions);
}
// evaluate the criteria against the row data
$result = Calculation::getInstance()->_calculateFormulaValue('=' . $conditions);
// If the row failed to meet the criteria, remove it from the database
if ($result !== true) {
unset($database[$dataRow]);
}
}
return $database;
}
private static function processCondition(string $criterion, array $fields, array $dataValues, string $conditions)
{
$key = array_search($criterion, $fields, true);
$dataValue = 'NULL';
if (is_bool($dataValues[$key])) {
$dataValue = ($dataValues[$key]) ? 'TRUE' : 'FALSE';
} elseif ($dataValues[$key] !== null) {
$dataValue = $dataValues[$key];
// escape quotes if we have a string containing quotes
if (is_string($dataValue) && strpos($dataValue, '"') !== false) {
$dataValue = str_replace('"', '""', $dataValue);
}
$dataValue = (is_string($dataValue)) ? Calculation::wrapResult(strtoupper($dataValue)) : $dataValue;
}
return str_replace('[:' . $criterion . ']', $dataValue, $conditions);
}
}
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