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<?php |
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/** |
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* Platine ETL |
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* |
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* Platine ETL is a library to Extract-Transform-Load Data from various sources |
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* |
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* This content is released under the MIT License (MIT) |
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* |
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* Copyright (c) 2020 Platine ETL |
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* Copyright (c) 2019 Benoit POLASZEK |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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declare(strict_types=1); |
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namespace Platine\Etl\Iterator; |
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use IteratorAggregate; |
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use Traversable; |
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/** |
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* @class CsvKeysAwareIterator |
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* @package Platine\Etl\Iterator |
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* @implements IteratorAggregate<int|string, mixed> |
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*/ |
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class CsvKeysAwareIterator implements IteratorAggregate, CsvIteratorInterface |
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{ |
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/** |
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* The CSV iterator instance |
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* @var CsvIteratorInterface<int|string, mixed> |
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*/ |
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protected CsvIteratorInterface $iterator; |
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/** |
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* The CSV keys (fields) |
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* @var string[] |
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*/ |
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protected array $keys = []; |
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/** |
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* Whether to skip first line |
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* @var bool |
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*/ |
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protected bool $skipFirstLine = true; |
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/** |
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* Whether already started |
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* @var bool |
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*/ |
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protected bool $started = false; |
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/** |
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* Create new instance |
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* @param CsvIteratorInterface $iterator |
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* @param string[] $keys |
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* @param bool $skipFirstLine |
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*/ |
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public function __construct( |
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CsvIteratorInterface $iterator, |
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array $keys = [], |
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bool $skipFirstLine = true |
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) { |
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$this->iterator = $iterator; |
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$this->keys = $keys; |
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$this->skipFirstLine = $skipFirstLine; |
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} |
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/** |
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* {@inheritodc} |
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*/ |
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public function getIterator(): Traversable |
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{ |
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foreach ($this->iterator as $value) { |
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if ($this->started === false) { |
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$this->started = true; |
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if (count($this->keys) === 0) { |
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$this->keys = $value; |
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} |
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if ($this->skipFirstLine === true) { |
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continue; |
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} |
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} |
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yield self::combine($this->keys, $value); |
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} |
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} |
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/** |
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* Combine keys and values |
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* @param string[] $keys |
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* @param array<string, mixed> $values |
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* @return array<int|string, mixed> |
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*/ |
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protected static function combine(array $keys, array $values): array |
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{ |
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$nbKeys = count($keys); |
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$nbValues = count($values); |
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if ($nbKeys < $nbValues) { |
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return (array) array_combine( |
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$keys, |
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array_slice(array_values($values), 0, $nbKeys) |
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); |
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} |
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if ($nbKeys > $nbValues) { |
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return (array) array_combine( |
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$keys, |
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array_merge($values, (array) array_fill(0, $nbKeys - $nbValues, null)) |
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); |
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} |
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return (array) array_combine($keys, $values); |
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} |
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} |
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platine-php /
etl
