ByJG\AnyDataset\Dataset\FixedTextFileIterator

Complexity

Total Complexity

16

Size/Duplication

Total Lines	134
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	3

Test Coverage

Coverage

68.08%

Importance

Changes

0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	6	1
A	count()	0	4	1
A	hasNext()	0	14	3
B	moveNext()	0	24	5
B	processBuffer()	0	32	5
A	key()	0	4	1

<?php

namespace ByJG\AnyDataset\Dataset;

use ByJG\AnyDataset\Enum\FixedTextDefinition;
use ByJG\AnyDataset\Exception\IteratorException;

class FixedTextFileIterator extends GenericIterator
{

    /**
     *
     * @var FixedTextDefinition[]
     */
    protected $fields;

    /**
     * @var resource
     */
    protected $handle;

    /**
     * @var int
     */
    protected $current = 0;

    /**
     *
     * @param resource $handle
     * @param FixedTextDefinition[] $fields
     */
    public function __construct($handle, $fields)
    {
        $this->fields = $fields;
        $this->handle = $handle;
        $this->current = 0;
    }

    /**
     * @access public
     * @return int
     */
    public function count()
    {
        return -1;
    }

    /**
     * @access public
     * @return bool
     */
    public function hasNext()
    {
        if (!$this->handle) {
            return false;
        }

        if (feof($this->handle)) {
            fclose($this->handle);

            return false;
        }

        return true;
    }


    /**
     * @return Row|null
     * @throws \ByJG\AnyDataset\Exception\IteratorException
     * @throws \ByJG\Serializer\Exception\InvalidArgumentException
     */
    public function moveNext()
    {
        if ($this->hasNext()) {
            $buffer = fgets($this->handle, 4096);

            if ($buffer == "") {
                return new Row();
            }

            $fields = $this->processBuffer($buffer, $this->fields);

            if (is_null($fields)) {
                throw new IteratorException("Definition does not match");
            }

            $this->current++;
            return new Row($fields);
        }

        if ($this->handle) {
            fclose($this->handle);
        }
        return null;
    }

    /**
     * @param $buffer
     * @param $fieldDefinition
     * @return array
     * @throws \ByJG\AnyDataset\Exception\IteratorException
     */
    protected function processBuffer($buffer, $fieldDefinition)
    {
        $cntDef = count($fieldDefinition);
        $fields = [];
        for ($i = 0; $i < $cntDef; $i++) {
            $fieldDef = $fieldDefinition[$i];

            $fields[$fieldDef->fieldName] = substr($buffer, $fieldDef->startPos, $fieldDef->length);
            if (!empty($fieldDef->requiredValue)
                && (
                    !preg_match("/^[" . $fieldDef->requiredValue . "]$/", $fields[$fieldDef->fieldName])
                )
            ) {
                throw new IteratorException(
                    "Expected the value '"
                    . $fieldDef->requiredValue
                    . "' and I got '"
                    . $fields[$fieldDef->fieldName]
                    . "'"
                );
            }

            if (is_array($fieldDef->subTypes)) {
                $fields[$fieldDef->fieldName] = $this->processBuffer(
                    $fields[$fieldDef->fieldName],
                    $fieldDef->subTypes
                );
            }
        }

        return $fields;
    }

    public function key()
    {
        return $this->current;
    }
}