89 lines
2.5 KiB
PHP
89 lines
2.5 KiB
PHP
<?php
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/**
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* Created by PhpStorm.
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* User: exodu
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* Date: 06.08.2017
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* Time: 18:47
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*/
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namespace data\file;
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class FileHandler extends \Prefab {
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const ERROR_STREAM_READABLE = 'Stream is not readable "%s"';
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const LOG_FILE_OFFSET_MIN = 0;
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const LOG_FILE_OFFSET = 0;
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const LOG_FILE_OFFSET_MAX = 10000;
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const LOG_FILE_LIMIT_MIN = 1;
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const LOG_FILE_LIMIT = 100;
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const Log_File_LIMIT_MAX = 100;
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/**
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* parse file from end to first line
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* @param string $sourceFile
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* @param int $offset
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* @param int $limit
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* @param \Closure|null $rowParser
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* @return array
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*/
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public function readFileReverse(
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string $sourceFile,
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int $offset = self::LOG_FILE_OFFSET,
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int $limit = self::LOG_FILE_LIMIT,
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\Closure $rowParser = null
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) : array {
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$data = [];
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if(is_file($sourceFile)){
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if(is_readable($sourceFile)){
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$file = new ReverseSplFileObject($sourceFile, $offset);
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$file->setFlags(\SplFileObject::DROP_NEW_LINE | \SplFileObject::READ_AHEAD | \SplFileObject::SKIP_EMPTY);
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foreach( new \LimitIterator($file, 0, $limit) as $i => $rowData){
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if(is_callable($rowParser)){
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// custom parser for row data -> manipulate $data by ref
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$rowParser($rowData, $data);
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}else{
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$data[] = $rowData;
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}
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}
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}else{
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\Base::instance()->error(500, sprintf(self::ERROR_STREAM_READABLE, $sourceFile));
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}
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}
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return $data;
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}
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/**
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* validate offset
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* @param int $offset
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* @return int
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*/
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public static function validateOffset(int $offset): int{
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if(
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$offset < self::LOG_FILE_OFFSET_MIN ||
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$offset > self::LOG_FILE_OFFSET_MAX
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){
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$offset = self::LOG_FILE_OFFSET;
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}
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return $offset;
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}
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/**
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* validate limit
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* @param int $limit
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* @return int
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*/
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public static function validateLimit(int $limit): int{
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if(
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$limit < self::LOG_FILE_LIMIT_MIN ||
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$limit > self::Log_File_LIMIT_MAX
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){
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$limit = self::LOG_FILE_LIMIT;
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}
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return $limit;
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}
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} |