public function __construct($line, $column, $value, $status, $blockSize)
{
$this->line = $line;
$this->column = $column;
$this->value = $value;
$authorizedValue = array();
$this->status = $status;
$this->block = 0;
$this->block += (int) ($this->line / $blockSize) * $blockSize;
$this->block += (int) ($this->column / $blockSize);
// For empty cell => initialize authorized values (with all existing values for sudoku's size)
if ($value == null || $value == 0) {
$this->authorizedValue = SudokuTool::buildDefaultAuthorizedValue($blockSize * $blockSize);
}
}
/**
* Allows to check if one authorized value is defined on once line/column in cell's block.
* In this case, we remove this value from cell defined in other blocks and on same line/column.
* @param array $unresolvedBlockCellList Block cells used to find single value on once line/column in block (as SudokuCell[]).
* @param SudokuGrid $sudoku Full sudoku grid containing cell to process.
*/
private function removeSingleValueFromBlock(array $unresolvedBlockCellList, SudokuGrid $sudoku)
{
foreach ($unresolvedBlockCellList as $cellToProcess) {
// Browse all authorized values for cell to process
foreach ($cellToProcess->getAuthorizedValue() as $value) {
$uniqueLineValue = true;
$uniqueColumnValue = true;
// Check if value is unique inside block's line/column
foreach ($unresolvedBlockCellList as $blockCell) {
if (!$blockCell->isSameCell($cellToProcess) && in_array($value, $blockCell->getAuthorizedValue())) {
if ($uniqueLineValue && $blockCell->getLine() != $cellToProcess->getLine()) {
$uniqueLineValue = false;
}
if ($uniqueColumnValue && $blockCell->getColumn() != $cellToProcess->getColumn()) {
$uniqueColumnValue = false;
}
}
}
// If value is unique in block's line => remove this value from other line's cell (in other blocks)
if ($uniqueLineValue) {
// Get all cells on same line that doesn't belongs to current cell's block
$otherLineCellList = $sudoku->getLine($cellToProcess->getLine(), false);
// SudokuCell[]
SudokuTool::removeSudokuCellListFromList($unresolvedBlockCellList, $otherLineCellList);
foreach ($otherLineCellList as $otherLineCell) {
$otherLineCell->removeAuthorizedValue($value);
}
}
// If value is unique in block's column => remove this value from other column's cell (in other blocks)
if ($uniqueColumnValue) {
// Get all cells on same line that doesn't belongs to current cell's block
$otherColumnCellList = $sudoku->getColumn($cellToProcess->getColumn(), false);
// SudokuCell[]
SudokuTool::removeSudokuCellListFromList($unresolvedBlockCellList, $otherColumnCellList);
foreach ($otherColumnCellList as $otherColumnCell) {
$otherColumnCell->removeAuthorizedValue($value);
}
}
}
}
}