GetStringsFromStateMachineExecution.php

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<?php
 
namespace Drupal\dkan_sql_endpoint\Helper;
 
class GetStringsFromStateMachineExecution {
  private $execution;
  private $strings = [];
  private $currentString = "";
 
  public function __construct(array $stateMachineExecution) {
    $this->execution = $stateMachineExecution;
  }
 
  public function get() {
    foreach ($this->execution as $states_or_input) {
      if ($this->isStates($states_or_input)) {
        $this->processStates($states_or_input);
        continue;
      }
 
      $input = $states_or_input;
      $this->currentString .= $input;
    }
 
    $this->saveAndResetCurrentString();
 
    return $this->strings;
  }
 
  private function processStates(array $states) {
    if ($this->containsFirstState($states)) {
      $this->saveAndResetCurrentString();
    }
  }
 
  private function saveAndResetCurrentString() {
    if (!empty($this->currentString)) {
      $this->strings[] = $this->currentString;
      $this->currentString = "";
    }
  }
 
  private function isStates($input): bool {
    return is_array($input);
  }
 
  private function containsFirstState(array $states): bool {
    return in_array(0, $states);
  }
 
}