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<?php |
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namespace Arrilot\DataAnonymization; |
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use Arrilot\DataAnonymization\Database\DatabaseInterface; |
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use Faker\Factory; |
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use Mockery\CountValidator\Exception; |
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class Anonymizer |
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{ |
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/** |
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* Database interactions object. |
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* |
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* @var DatabaseInterface |
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*/ |
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protected $database; |
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/** |
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* Generator object (e.g faker). |
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* |
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* @var mixed |
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*/ |
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protected $generator; |
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/** |
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* Blueprints for tables. |
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* |
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* @var array |
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*/ |
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protected $blueprints = []; |
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/** |
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* Constructor. |
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* |
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* @param DatabaseInterface $database |
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* @param mixed $generator |
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*/ |
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public function __construct(DatabaseInterface $database, $generator = null) |
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{ |
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$this->database = $database; |
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$this->setGenerator($generator); |
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} |
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/** |
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* Setter for generator. |
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* |
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* @param mixed $generator |
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* |
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* @return $this |
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*/ |
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public function setGenerator($generator) |
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{ |
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if ($generator !== null) { |
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$this->generator = $generator; |
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} |
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if (class_exists('\Faker\Factory')) { |
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$this->generator = Factory::create(); |
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} |
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return $this; |
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} |
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/** |
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* Getter for generator. |
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* |
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* @return mixed |
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*/ |
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public function getGenerator() |
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{ |
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return $this->generator; |
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} |
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/** |
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* Perform data anonymization. |
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* |
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* @return void |
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*/ |
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public function run() |
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{ |
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foreach ($this->blueprints as $table => $blueprint) { |
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$this->applyBlueprint($blueprint); |
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} |
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} |
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/** |
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* Describe a table with a given callback. |
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* |
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* @param string $name |
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* @param callable $callback |
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* |
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* @return void |
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*/ |
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public function table($name, callable $callback) |
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{ |
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$blueprint = new Blueprint($name, $callback); |
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$this->blueprints[$name] = $blueprint->build(); |
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} |
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/** |
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* Apply blueprint to the database. |
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* |
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* @param Blueprint $blueprint |
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* |
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* @return void |
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*/ |
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protected function applyBlueprint(Blueprint $blueprint) |
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{ |
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foreach ($blueprint->columns as $column) { |
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$this->updateColumn($blueprint->table, $blueprint->primary, $column); |
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} |
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} |
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/** |
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* Update all needed values of a give column. |
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* |
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* @param string $table |
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* @param array $primary |
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* @param array $column |
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*/ |
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protected function updateColumn($table, $primary, $column) |
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{ |
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$rows = $this->database->getRows( |
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$table, |
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$this->mergeColumns($primary, $column['name']), |
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$column['where'] |
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); |
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if (empty($rows)) { |
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return; |
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} |
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foreach ($rows as $rowNum => $row) { |
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$this->database->updateByPrimary( |
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$table, |
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Helpers::arrayOnly($row, $primary), |
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$column['name'], |
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$this->calculateNewValue($column['replace'], $rowNum) |
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); |
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} |
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} |
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/** |
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* Calculate new value for each row. |
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* |
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* @param string|callable $replace |
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* @param int $rowNum |
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* |
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* @return string |
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*/ |
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protected function calculateNewValue($replace, $rowNum) |
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{ |
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$value = $this->handlePossibleClosure($replace); |
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return $this->replacePlaceholders($value, $rowNum); |
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} |
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/** |
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* Replace placeholders |
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* |
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* @param mixed $value |
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* @param int $rowNum |
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* |
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* @return mixed |
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*/ |
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protected function replacePlaceholders($value, $rowNum) |
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{ |
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if (!is_string($value)) { |
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return $value; |
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} |
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return str_replace('#row#', $rowNum, $value); |
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} |
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/** |
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* @param $replace |
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* @return mixed |
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*/ |
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protected function handlePossibleClosure($replace) |
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{ |
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if (!is_callable($replace)) { |
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return $replace; |
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} |
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if ($this->generator === null) { |
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throw new Exception('You forgot to set a generator'); |
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} |
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return call_user_func($replace, $this->generator); |
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} |
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/** |
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* Merge columns for select. |
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* |
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* @param array $primary |
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* @param string $columnName |
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* |
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* @return array |
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*/ |
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protected function mergeColumns($primary, $columnName) |
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{ |
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return array_merge($primary, [ |
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$columnName, |
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]); |
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} |
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} |
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arrilot /
data-anonymization
