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<?php |
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namespace kalanis\kw_files\Traits; |
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use kalanis\kw_files\FilesException; |
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/** |
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* Trait TStreamToPos |
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* @package kalanis\kw_menu\Traits |
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* Write stream at expected position |
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*/ |
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trait TStreamToPos |
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{ |
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use TLang; |
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/** |
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* @param resource $original stream with original content, usually file handler |
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* @param resource $added stream with what will be added, also file handler |
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* @param int|null $offset where it will be added |
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* @throws FilesException |
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* @return resource |
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*/ |
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public function addStreamToPosition($original, $added, ?int $offset = null) |
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{ |
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if (!is_null($offset)) { |
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// put it somewhere, left the rest intact |
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$originalLength = fstat($original)['size']; |
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$addedLength = fstat($added)['size']; |
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// original data in the beginning |
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$destination = fopen('php://temp', 'rb+'); // the target storage |
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if ((0 !== $offset) && (false === stream_copy_to_stream($original, $destination, $offset, 0))) { |
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// @codeCoverageIgnoreStart |
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throw new FilesException($this->getLang()->flCannotWriteFile('temp')); |
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} |
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// @codeCoverageIgnoreEnd |
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// filler - when the size is too much |
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if ($originalLength < $offset) { |
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$begin = fopen('php://temp', 'rb+'); |
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/** @scrutinizer ignore-unhandled */@fwrite($begin, str_repeat("\0", intval(abs($offset - $originalLength)))); |
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/** @scrutinizer ignore-unhandled */@rewind($begin); |
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if (false === stream_copy_to_stream($begin, $destination, -1, 0)) { |
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// @codeCoverageIgnoreStart |
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throw new FilesException($this->getLang()->flCannotWriteFile('temp')); |
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} |
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// @codeCoverageIgnoreEnd |
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$originalLength += fstat($begin)['size']; |
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} |
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// amended data itself |
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if (false === stream_copy_to_stream($added, $destination, -1, 0)) { |
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// @codeCoverageIgnoreStart |
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throw new FilesException($this->getLang()->flCannotWriteFile('temp')); |
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} |
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// @codeCoverageIgnoreEnd |
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// the rest from the original |
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if ($originalLength > $offset + $addedLength) { |
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$rest = fopen('php://temp', 'rb+'); // the temporary storage for the end |
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if (false === stream_copy_to_stream($original, $rest, -1, $offset + $addedLength)) { |
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// @codeCoverageIgnoreStart |
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throw new FilesException($this->getLang()->flCannotWriteFile('temp')); |
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} |
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/** @scrutinizer ignore-unhandled */@rewind($rest); |
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// @codeCoverageIgnoreEnd |
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if (false === stream_copy_to_stream($rest, $destination, -1, 0)) { |
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// @codeCoverageIgnoreStart |
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throw new FilesException($this->getLang()->flCannotWriteFile('temp')); |
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} |
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// @codeCoverageIgnoreEnd |
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} |
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return $destination; |
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} else { |
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return $added; |
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} |
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} |
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} |
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alex-kalanis /
kw_files
