AnimeDb\Bundle\PaginationBundle\Service\NavigateRange

Complexity

Total Complexity

12

Size/Duplication

Total Lines	120
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Test Coverage

Coverage

100%

Importance

Changes	9
Bugs	1	Features	0

8 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	getLeftOffset()	0	4	1
A	getRightOffset()	0	4	1
A	buildOffset()	0	12	2
A	definitionOffset()	0	7	1
A	adjustmentLargeLeftOffset()	0	10	2
A	adjustmentLargeRightOffset()	0	14	2
A	adjustmentLowerLeftOffset()	0	8	2

<?php
/**
 * AnimeDb package.
 *
 * @author    Peter Gribanov <info@peter-gribanov.ru>
 * @copyright Copyright (c) 2011, Peter Gribanov
 * @license   http://opensource.org/licenses/MIT
 */
namespace AnimeDb\Bundle\PaginationBundle\Service;

class NavigateRange
{
    /**
     * @var Configuration
     */
    protected $config;

    /**
     * @var int
     */
    protected $left_offset = -1;

    /**
     * @var int
     */
    protected $right_offset = -1;

    /**
     * @param Configuration $config
     */
    public function __construct(Configuration $config)
    {
        $this->config = $config;
    }

    /**
     * @return int
     */
    public function getLeftOffset()
    {
        return $this->buildOffset()->left_offset;
    }

    /**
     * @return int
     */
    public function getRightOffset()
    {
        return $this->buildOffset()->right_offset;
    }

    /**
     * @return NavigateRange
     */
    protected function buildOffset()
    {
        if ($this->left_offset < 0) {
            $this
                ->definitionOffset()
                ->adjustmentLargeLeftOffset()
                ->adjustmentLargeRightOffset()
                ->adjustmentLowerLeftOffset();
        }

        return $this;
    }

    /**
     * Definition of offset to the left and to the right of the selected page.
     *
     * @return NavigateRange
     */
    protected function definitionOffset()
    {
        $this->left_offset = (int) floor(($this->config->getMaxNavigate() - 1) / 2);
        $this->right_offset = (int) ceil(($this->config->getMaxNavigate() - 1) / 2);

        return $this;
    }

    /**
     * Adjustment, if the offset is too large left.
     *
     * @return NavigateRange
     */
    protected function adjustmentLargeLeftOffset()
    {
        if ($this->config->getCurrentPage() - $this->left_offset < 1) {
            $offset = (int) abs($this->config->getCurrentPage() - 1 - $this->left_offset);
            $this->left_offset = $this->left_offset - $offset;
            $this->right_offset = $this->right_offset + $offset;
        }

        return $this;
    }

    /**
     * Adjustment, if the offset is too large right.
     *
     * @return NavigateRange
     */
    protected function adjustmentLargeRightOffset()
    {
        if ($this->config->getCurrentPage() + $this->right_offset > $this->config->getTotalPages()) {
            $offset = (int) abs(
                $this->config->getTotalPages() -
                $this->config->getCurrentPage() -
                $this->right_offset
            );
            $this->left_offset = $this->left_offset + $offset;
            $this->right_offset = $this->right_offset - $offset;
        }

        return $this;
    }

    /**
     * Left offset should point not lower of the first page.
     *
     * @return NavigateRange
     */
    protected function adjustmentLowerLeftOffset()
    {
        if ($this->left_offset >= $this->config->getCurrentPage()) {
            $this->left_offset = $this->config->getCurrentPage() - 1;
        }

        return $this;
    }
}