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<?php |
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namespace NwLaravel\Iterators; |
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/** |
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* Abstract interação de arquivos, implementa o iterator para percorrer as linhas do arquivo |
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*/ |
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abstract class AbstractIteratorFile implements \Iterator, \Countable |
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{ |
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/** |
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* @var string |
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*/ |
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protected $fileName; |
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/** |
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* @var resource |
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*/ |
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protected $fileHandle; |
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/** |
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* @var mixed |
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*/ |
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protected $current; |
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/** |
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* @var int |
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*/ |
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protected $key; |
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/** |
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* @var int |
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*/ |
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protected $count; |
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/** |
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* Make Row Current |
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* |
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* @return mixed |
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*/ |
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abstract protected function makeCurrent(); |
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/** |
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* Abre o arquivo para leitura |
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* |
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* @param string $fileName Path |
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* |
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* @throws \RuntimeException |
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*/ |
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public function __construct($fileName) |
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{ |
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$this->fileName = (string) $fileName; |
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if (!file_exists($fileName) || !$this->fileHandle = fopen($fileName, 'r')) { |
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throw new \RuntimeException('Couldn\'t open file "' . $fileName . '"'); |
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} |
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} |
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/** |
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* Contagem de linhas |
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* |
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* @return int |
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*/ |
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public function count() |
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{ |
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if (is_null($this->count)) { |
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$this->count = 0; |
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// Salva a posição do ponteiro de leitura |
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$tell = ftell($this->fileHandle); |
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rewind($this->fileHandle); |
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while (!feof($this->fileHandle) && false !== fgets($this->fileHandle)) { |
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$this->count += 1; |
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} |
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// Restabelece a posição do ponteiro |
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fseek($this->fileHandle, $tell); |
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} |
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return $this->count; |
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} |
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/** |
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* Inicia a leitura do arquivo do inicio |
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* |
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* @return void |
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*/ |
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public function rewind() |
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{ |
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rewind($this->fileHandle); |
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$this->key = -1; |
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$this->next(); |
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} |
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/** |
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* Retorna o indice atual |
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* |
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* @return int |
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*/ |
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public function key() |
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{ |
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return $this->key; |
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} |
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/** |
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* Valida se havera proxima linha |
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* |
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* @return bool |
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*/ |
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public function valid() |
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{ |
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return ($this->current !== false && !is_null($this->current)); |
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} |
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/** |
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* Retorna a linha atual |
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* |
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* @return string |
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*/ |
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public function current() |
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{ |
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return $this->current; |
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} |
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/** |
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* Busca a proxima linha |
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* |
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* @Make return void |
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*/ |
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public function next() |
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{ |
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$this->current = $this->makeCurrent(); |
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$this->key++; |
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} |
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/** |
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* Le alinha no arquivo, formata o encodig caso seja necessario |
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* |
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* @return string |
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*/ |
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protected function getLine() |
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{ |
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$encoding = 'UTF-8'; |
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$line = false; |
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if (! feof($this->fileHandle)) { |
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$line = fgets($this->fileHandle); |
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if ($line !== false) { |
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$line = trim($line); |
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if (mb_detect_encoding($line, $encoding, true) != $encoding) { |
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$line = utf8_encode($line); |
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} |
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} |
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} |
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return $line; |
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} |
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/** |
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161
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* Ao destruir fecha o arquivo |
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* |
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* @return void |
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*/ |
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public function __destruct() |
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{ |
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if (is_resource($this->fileHandle)) { |
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fclose($this->fileHandle); |
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} |
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} |
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} |
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naturalweb /
nwlaravel
