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<?php |
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|
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namespace ImportWP\Common\Importer\Config; |
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|
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use ImportWP\Common\Importer\ConfigInterface; |
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use ImportWP\Common\Importer\Exception\FileException; |
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|
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class Config implements ConfigInterface |
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{ |
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|
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private $config; |
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private $file; |
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private $index_buffer = []; |
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private $index_cache_size = 1; |
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|
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public function __construct($file) |
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{ |
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$this->file = $file; |
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if (file_exists($this->file)) { |
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$this->read(); |
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} else { |
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$this->config = array(); |
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$this->write(); |
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} |
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} |
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|
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/** |
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* Read from file |
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*/ |
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private function read() |
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{ |
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$this->config = json_decode(file_get_contents($this->file), true); |
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} |
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|
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/** |
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* Write to file |
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*/ |
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private function write() |
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{ |
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file_put_contents($this->file, json_encode($this->config)); |
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} |
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|
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/** |
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* Get setting |
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* |
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* @param $key |
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* |
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* @return mixed |
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*/ |
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public function get($key) |
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{ |
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return isset($this->config[$key]) ? $this->config[$key] : false; |
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} |
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|
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/** |
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* Set setting |
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* |
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* @param $key |
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* @param $data |
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* |
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* @return mixed |
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*/ |
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public function set($key, $data) |
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{ |
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$this->config[$key] = $data; |
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$this->write(); |
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} |
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|
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public function getData() |
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{ |
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$data = $this->get('data'); |
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|
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return $data; |
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} |
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|
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/** |
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* TODO: Refactor function, basic implementation to test stream file indexing |
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* @param $key |
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* @param $record |
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* @return array |
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* @throws FileException |
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*/ |
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public function getIndex($key, $record) |
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{ |
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$recordIndex = $record * 2; |
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|
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$cache = $this->getCachedIndex($key, $record); |
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if ($cache) { |
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return $cache; |
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} |
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|
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$file = $this->getIndexFile($key); |
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if (!file_exists($file)) { |
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throw new FileException(sprintf(__("Config Index File Not Found: %s", 'jc-importer'), $file)); |
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} |
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|
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$fh = fopen($file, 'r'); |
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$counter = 0; |
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|
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|
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$max_chunk = 8192; |
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$prev_chunk = false; |
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|
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$found = $recordIndex === 0 ? true : false; |
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$cache_max = $this->getIndexCacheSize(); |
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$cache = []; |
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|
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while (!feof($fh)) { |
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|
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// get buffer / append end of previous buffer |
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$buffer = fread($fh, $max_chunk); |
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if ($prev_chunk !== false) { |
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$buffer = $prev_chunk . $buffer; |
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} |
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|
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// reset $prev_chunk |
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$prev_chunk = false; |
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|
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$buffer_len = strlen($buffer); |
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|
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$separator_line_count = substr_count($buffer, "\n"); |
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|
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if ($counter + $separator_line_count >= $recordIndex) { |
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|
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// loop through each separator |
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$separator_offset = 0; |
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$separator_counter = $counter; |
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while ($separator_offset < strlen($buffer)) { |
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|
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$separator_pos = strpos($buffer, "\n", $separator_offset); |
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if ($separator_pos !== false) { |
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|
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if ($found) { |
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$cache_data = substr($buffer, $separator_offset, $separator_pos - $separator_offset); |
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$cache[] = $cache_data; |
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if (count($cache) >= $cache_max * 2) { |
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break; |
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} |
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} |
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|
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$separator_counter++; |
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$separator_offset = $separator_pos + 1; |
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if ($separator_counter === $recordIndex) { |
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$found = true; |
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} |
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} elseif (strlen($buffer) > $separator_offset) { |
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$prev_chunk = substr($buffer, $separator_offset); |
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break; |
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} |
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} |
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} |
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|
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if (count($cache) >= $cache_max * 2) { |
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break; |
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} |
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|
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$counter += $separator_line_count; |
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} |
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|
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if (count($cache) < 2) { |
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throw new FileException(sprintf(__("Unable to located record: %s.", 'jc-importer'), ($record + 1))); |
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} |
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|
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// store cache |
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$this->config['cached_indices'] = [ |
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'key' => $key, |
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'start' => $record, |
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'cache' => $cache |
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]; |
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$this->write(); |
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|
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return [ |
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$cache[0], |
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$cache[1] |
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]; |
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} |
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|
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public function setIndex($key, $record, $start, $end) |
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{ |
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|
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$this->index_buffer[] = $start; |
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$this->index_buffer[] = $end - $start; |
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|
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if (count($this->index_buffer) >= 200000) { |
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$this->storeIndexes($key, true); |
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} |
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} |
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|
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public function readIndexes($key) |
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{ |
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if (!$this->hasIndexed($key)) { |
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return false; |
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} |
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|
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// Treat a zero-record index as missing so it can be rebuilt |
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if (!isset($this->config['count'][$key]) || intval($this->config['count'][$key]) < 1) { |
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return false; |
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} |
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|
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return true; |
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} |
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|
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public function storeIndexes($key, $buffer = false) |
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{ |
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|
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if (count($this->index_buffer) > 0) { |
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|
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if (!isset($this->config['count'])) { |
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$this->config['count'] = array(); |
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} |
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|
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if (!isset($this->config['count'][$key])) { |
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$this->config['count'][$key] = 0; |
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} |
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|
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$this->config['count'][$key] += count($this->index_buffer) / 2; |
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|
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$fh = fopen($this->getIndexFile($key), 'a'); |
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foreach ($this->index_buffer as $value) { |
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fputs($fh, $value . "\n"); |
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} |
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fclose($fh); |
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$this->index_buffer = []; |
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} |
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|
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// hit end of indexer, write config to file |
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if (false === $buffer) { |
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if (!isset($this->config['indexed'])) { |
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$this->config['indexed'] = array(); |
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} |
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|
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$this->config['indexed'][$key] = true; |
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$this->write(); |
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} |
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|
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return true; |
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} |
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|
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private function hasIndexed($key) |
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{ |
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return isset($this->config['indexed']) && isset($this->config['indexed'][$key]) && true === $this->config['indexed'][$key]; |
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} |
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|
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public function getRecordCount($key) |
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{ |
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if (!isset($this->config['count'][$key])) { |
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return 0; |
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} |
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|
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return intval($this->config['count'][$key]); |
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} |
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|
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public function getIndexFile($key) |
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{ |
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return $this->file . '.' . $key; |
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} |
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|
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private function getCachedIndex($key, $record) |
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{ |
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if ( |
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isset($this->config['cached_indices']['key']) |
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&& $this->config['cached_indices']['key'] === $key |
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&& isset($this->config['cached_indices']['start']) |
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&& isset($this->config['cached_indices']['cache']) |
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&& $this->config['cached_indices']['start'] <= $record |
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&& ($this->config['cached_indices']['start'] + (count($this->config['cached_indices']['cache']) / 2)) - 1 >= $record |
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) { |
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|
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$index = ($record - $this->config['cached_indices']['start']) * 2; |
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|
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return [ |
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$this->config['cached_indices']['cache'][$index], |
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$this->config['cached_indices']['cache'][$index + 1] |
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]; |
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} |
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|
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return false; |
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} |
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|
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public function setIndexCacheSize($length) |
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{ |
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$this->index_cache_size = $length; |
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} |
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|
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public function getIndexCacheSize() |
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{ |
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return $this->index_cache_size; |
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} |
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} |
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|
