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<?php

/*
 * This file is part of JSON-API.
 *
 * (c) Toby Zerner <toby.zerner@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Tobscure\JsonApi;

use Tobscure\JsonApi\Exception\InvalidParameterException;

class Parameters
{
    /**
     * @var array
     */
    protected $input;

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

/**
     * Get the includes.
     *
     * @param array $available
     *
     * @throws \Tobscure\JsonApi\Exception\InvalidParameterException
     *
     * @return array
     */
    public function getInclude(array $available = [])
    {
        if ($include = $this->getInput('include')) {
            $relationships = explode(',', $include);

$invalid = array_diff($relationships, $available);

if (count($invalid)) {
                throw new InvalidParameterException(
                    'Invalid includes ['.implode(',', $invalid).']',
                    1,
                    null,
                    'include'
                );
            }

return $relationships;
        }

return [];
    }

/**
     * Get number of offset.
     *
     * @param int|null $perPage
     *
     * @throws \Tobscure\JsonApi\Exception\InvalidParameterException
     *
     * @return int
     */
    public function getOffset($perPage = null)
    {
        if ($perPage && ($offset = $this->getOffsetFromNumber($perPage))) {
            return $offset;
        }

$offset = (int) $this->getPage('offset');

if ($offset < 0) {
            throw new InvalidParameterException('page[offset] must be >=0', 2, null, 'page[offset]');
        }

return $offset;
    }

/**
     * Calculate the offset based on the page[number] parameter.
     *
     * @param int $perPage
     *
     * @throws \Tobscure\JsonApi\Exception\InvalidParameterException
     *
     * @return int
     */
    protected function getOffsetFromNumber($perPage)
    {
        $page = (int) $this->getPage('number');

if ($page <= 1) {
            return 0;
        }

return ($page - 1) * $perPage;
    }

/**
     * Get the limit.
     *
     * @param int|null $max
     *
     * @return int|null
     */
    public function getLimit($max = null)
    {
        $limit = $this->getPage('limit') ?: $this->getPage('size') ?: null;

if ($limit && $max) {
            $limit = min($max, $limit);
        }

return $limit;
    }

/**
     * Get the sort.
     *
     * @param array $available
     *
     * @throws \Tobscure\JsonApi\Exception\InvalidParameterException
     *
     * @return array
     */
    public function getSort(array $available = [])
    {
        $sort = [];

if ($input = $this->getInput('sort')) {
            $fields = explode(',', $input);

foreach ($fields as $field) {
                if (substr($field, 0, 1) === '-') {
                    $field = substr($field, 1);
                    $order = 'desc';
                } else {
                    $order = 'asc';
                }

$sort[$field] = $order;
            }

$invalid = array_diff(array_keys($sort), $available);

if (count($invalid)) {
                throw new InvalidParameterException(
                    'Invalid sort fields ['.implode(',', $invalid).']',
                    3,
                    null,
                    'sort'
                );
            }
        }

return $sort;
    }

/**
     * Get the fields requested for inclusion.
     *
     * @return array
     */
    public function getFields()
    {
        $fields = $this->getInput('fields');

if (! is_array($fields)) {
            return [];
        }

return array_map(function ($fields) {
            return explode(',', $fields);
        }, $fields);
    }

/**
     * Get a filter item.
     *
     * @return mixed
     */
    public function getFilter()
    {
        return $this->getInput('filter');
    }

/**
     * Get an input item.
     *
     * @param string $key
     * @param null $default
     *
     * @return mixed
     */
    protected function getInput($key, $default = null)
    {
        return isset($this->input[$key]) ? $this->input[$key] : $default;
    }

/**
     * Get the page.
     *
     * @param string $key
     *
     * @return string
     */
    protected function getPage($key)
    {
        $page = $this->getInput('page');

return isset($page[$key]) ? $page[$key] : '';
    }
}

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Name	Size	Perms	Modified	Actions
Exception DIR	-	drwxr-xr-x	2024-11-22 17:53:12	Edit Download recursive recursive
AbstractSerializer.php	2.08 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
Collection.php	2.92 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
Document.php	4.96 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
ElementInterface.php	994 B	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
ErrorHandler.php	1.31 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
LinksTrait.php	3.24 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
MetaTrait.php	956 B	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
Parameters.php	4.59 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
Relationship.php	1.49 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
Resource.php	8.79 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
SerializerInterface.php	1.24 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive
Util.php	1.12 KB	lrw-r--r--	2024-11-22 17:53:12	Edit Download recursive recursive

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