drupol\phpermutations\Iterators\Fibonacci

Complexity

Total Complexity

11

Size/Duplication

Total Lines	119
Duplicated Lines	0 %

Coupling/Cohesion

Dependencies

1

Test Coverage

Coverage

93.55%

Importance

Changes

0

10 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	3	1
A	current()	0	3	1
A	key()	0	3	1
A	next()	0	4	1
A	rewind()	0	5	1
A	valid()	0	3	1
A	count()	0	3	1
A	toArray()	0	9	2
A	setMaxLimit()	0	3	1
A	getMaxLimit()	0	3	1

<?php

namespace drupol\phpermutations\Iterators;

use drupol\phpermutations\Combinatorics;

/**
 * Class Fibonacci.
 *
 * @package drupol\phpermutations\Iterators
 */
class Fibonacci extends Combinatorics implements \Iterator, \Countable {

  /**
   * The maximum limit.
   *
   * @var int
   */
  protected $max;

  /**
   * The previous element.
   *
   * @var int
   */
  private $previous = 1;

  /**
   * The current element.
   *
   * @var int
   */
  private $current = 0;

  /**
   * The current key.
   *
   * @var int
   */
  private $key = 0;

  /**
   * Fibonacci constructor.
   */
  public function __construct() {
    $this->setMaxLimit(PHP_INT_MAX);
  }

  /**
   * {@inheritdoc}
   */
  public function current() {
    return $this->current;
  }

  /**
   * {@inheritdoc}
   */
  public function key() {
    return $this->key;
  }

  /**
   * {@inheritdoc}
   */
  public function next() {
    list($this->current, $this->previous) = array($this->current + $this->previous, $this->current);
    $this->key++;
  }

  /**
   * {@inheritdoc}
   */
  public function rewind() {
    $this->previous = 1;
    $this->current = 0;
    $this->key = 0;
  }

  /**
   * {@inheritdoc}
   */
  public function valid() {
    return ($this->current < $this->getMaxLimit());
  }

  /**
   * {@inheritdoc}
   */
  public function count() {
    return count($this->toArray());
  }

  /**
   * Convert the iterator into an array.
   *
   * @return array
   *   The elements.
   */
  public function toArray() {
    $data = array();

    for ($this->rewind(); $this->valid(); $this->next()) {
      $data[] = $this->current();
    }

    return $data;
  }

  /**
   * Set the maximum limit.
   *
   * @param int $max
   *   The limit.
   */
  public function setMaxLimit($max) {
    $this->max = $max;
  }

  /**
   * Get the maximum limit.
   *
   * @return int
   *   The limit.
   */
  public function getMaxLimit() {
    return intval($this->max);
  }

}