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<?php |
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/** |
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* This file is part of graze/data-file |
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* |
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* Copyright (c) 2016 Nature Delivered Ltd. <https://www.graze.com> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @license https://github.com/graze/data-file/blob/master/LICENSE.md |
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* @link https://github.com/graze/data-file |
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*/ |
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namespace Graze\DataFile\IO; |
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use Graze\DataFile\Format\Formatter\FormatterInterface; |
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use Graze\DataFile\Helper\OptionalLoggerTrait; |
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use InvalidArgumentException; |
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use Psr\Http\Message\StreamInterface; |
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use Psr\Log\LoggerAwareInterface; |
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use Psr\Log\LogLevel; |
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use Traversable; |
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class StreamWriter implements WriterInterface, LoggerAwareInterface |
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{ |
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use OptionalLoggerTrait; |
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/** @var FormatterInterface */ |
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private $formatter; |
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/** @var StreamInterface */ |
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private $stream; |
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/** |
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* @param StreamInterface $stream |
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* @param FormatterInterface $formatter Optional formatter, if not specified shall be determined based on the |
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* format of the file |
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*/ |
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public function __construct(StreamInterface $stream, FormatterInterface $formatter) |
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{ |
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$this->stream = $stream; |
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$this->formatter = $formatter; |
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} |
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/** |
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* Adds multiple lines to the CSV document |
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* |
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* a simple wrapper method around insertOne |
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* |
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* @param Traversable|array $rows a multidimensional array or a Traversable object |
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* |
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* @throws InvalidArgumentException If the given rows format is invalid |
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* |
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* @return static |
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*/ |
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public function insertAll($rows) |
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{ |
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$this->writeBlock($rows); |
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$this->stream->close(); |
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return $this; |
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} |
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/** |
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* @param Traversable|array $rows |
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*/ |
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private function writeBlock($rows) |
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{ |
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$this->log(LogLevel::INFO, 'Writing {count} rows to file', ['count' => count($rows)]); |
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$this->initialiseForWriting(); |
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$first = true; |
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foreach ($rows as $row) { |
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if (!$first) { |
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$this->stream->write($this->formatter->getRowSeparator()); |
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} |
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$this->stream->write($this->formatter->format($row)); |
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$first = false; |
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} |
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$this->stream->write($this->formatter->getClosingBlock()); |
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} |
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/** |
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* Initialise the resource for writing. |
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* |
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* If we are at 0, then write initial block, otherwise, remove closing block and add a row separator |
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* |
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* This is so we can append a file with special characters at the beginning and end |
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*/ |
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private function initialiseForWriting() |
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{ |
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// move to the end of the file to always append |
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$this->stream->seek(0, SEEK_END); |
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if ($this->stream->tell() === 0) { |
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$this->stream->write($this->formatter->getInitialBlock()); |
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} elseif (strlen($this->formatter->getClosingBlock()) > 0) { |
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$endBlock = $this->formatter->getClosingBlock(); |
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$this->stream->seek(strlen($endBlock) * -1, SEEK_CUR); |
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$this->stream->write($this->formatter->getRowSeparator()); |
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} elseif (strlen($this->formatter->getRowSeparator()) > 0) { |
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$this->stream->write($this->formatter->getRowSeparator()); |
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} |
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} |
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/** |
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* Adds a single line |
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* |
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* @param mixed $row an item to insert |
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* |
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* @return static |
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*/ |
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public function insertOne($row) |
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{ |
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$this->writeBlock([$row]); |
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return $this; |
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} |
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} |
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graze /
data-file
