PHPCoord\CoordinateOperation\IGNFGrid::initMntOrTac()

Complexity

Conditions	6
Paths	18

Size

Total Lines	56
Code Lines	35

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

<?php
    private function initMntOrTac(): void
    {
        $fixedHeaderRegexp = '^(-?[\d.]+) (-?[\d.]+) (-?[\d.]+) (-?[\d.]+) ([\d.]+) ([\d.]+) ([1-4]) ([01]) (\d) ([01]) ';
        $header = $this->gridFile->fgets();

        preg_match('/' . $fixedHeaderRegexp . '/', $header, $fixedHeaderParts);

        $this->startX = min((float) $fixedHeaderParts[1], (float) $fixedHeaderParts[2]);
        $this->endX = max((float) $fixedHeaderParts[1], (float) $fixedHeaderParts[2]);
        $this->startY = min((float) $fixedHeaderParts[3], (float) $fixedHeaderParts[4]);
        $this->endY = max((float) $fixedHeaderParts[3], (float) $fixedHeaderParts[4]);
        $this->columnGridInterval = (float) $fixedHeaderParts[5];
        $this->rowGridInterval = (float) $fixedHeaderParts[6];
        $this->numberOfColumns = (int) (string) (($this->endX - $this->startX) / $this->columnGridInterval) + 1;
        $this->numberOfRows = (int) (string) (($this->endY - $this->startY) / $this->rowGridInterval) + 1;
        $this->storageOrder = (int) $fixedHeaderParts[7];

The property storageOrder does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

        $coordinatesIncludedInData = (bool) $fixedHeaderParts[8];
        $this->valuesPerCoordinate = (int) $fixedHeaderParts[9];
        $precisionIncluded = (bool) $fixedHeaderParts[10];

        preg_match('/' . $fixedHeaderRegexp . str_repeat('(-?[\d.]+) ', $this->valuesPerCoordinate) . '(.*)$/', $header, $fullHeaderParts);

        $baseAdjustments = array_slice($fullHeaderParts, count($fullHeaderParts) - $this->valuesPerCoordinate - 1, $this->valuesPerCoordinate);
        foreach ($baseAdjustments as $baseAdjustment) {
            assert((float) $baseAdjustment === 0.0);
        }

        // these files are not always 1 record per line (sometimes blank lines, sometimes multiple records per row)
        // so direct file access is not possible. Read into memory instead :/

        $this->data = new SplFixedArray($this->numberOfColumns * $this->numberOfRows);

        $rawData = $this->gridFile->fread($this->gridFile->getSize() - strlen($header));
        $values = explode(' ', trim(preg_replace('/\s+/', ' ', $rawData)));

        $cursor = 0;
        for ($i = 0, $numValues = $this->numberOfColumns * $this->numberOfRows; $i < $numValues; ++$i) {
            if ($coordinatesIncludedInData) {
                $cursor += 2;
            }

            $rowData = [];
            for ($j = 0; $j < $this->valuesPerCoordinate; ++$j) {
                $rowData[] = (float) $values[$cursor];
                ++$cursor;
            }

            $this->data[$i] = $rowData;

            if ($precisionIncluded) {
                ++$cursor;
            }
        }

        $this->gridFile->fgets();
        assert($this->gridFile->eof());
    }