Jkphl\Micrometa\Ports\Item\ItemList

Complexity

Total Complexity

22

Size/Duplication

Total Lines	252
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	3

Test Coverage

Coverage

96.72%

Importance

Changes

0

16 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
A	current()	0	4	1
A	next()	0	4	1
A	key()	0	4	1
A	valid()	0	4	1
A	rewind()	0	4	1
A	offsetExists()	0	4	1
A	offsetGet()	0	4	1
A	offsetSet()	0	4	1
A	offsetUnset()	0	4	1
A	toObject()	0	10	1
A	getFirstItem()	0	14	2
A	getItems()	0	14	2
A	count()	0	4	1
A	__call()	0	18	4
A	getItemByTypeAndIndex()	0	14	2

<?php

/**
 * micrometa
 *
 * @category Jkphl
 * @package Jkphl\Micrometa
 * @subpackage Jkphl\Micrometa\Ports\Item
 * @author Joschi Kuphal <joschi@kuphal.net> / @jkphl
 * @copyright Copyright © 2017 Joschi Kuphal <joschi@kuphal.net> / @jkphl
 * @license http://opensource.org/licenses/MIT The MIT License (MIT)
 */

/***********************************************************************************
 *  The MIT License (MIT)
 *
 *  Copyright © 2017 Joschi Kuphal <joschi@kuphal.net> / @jkphl
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy of
 *  this software and associated documentation files (the "Software"), to deal in
 *  the Software without restriction, including without limitation the rights to
 *  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 *  the Software, and to permit persons to whom the Software is furnished to do so,
 *  subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 *  copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 *  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 *  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 *  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 *  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ***********************************************************************************/

namespace Jkphl\Micrometa\Ports\Item;

use Jkphl\Micrometa\Ports\Exceptions\InvalidArgumentException;
use Jkphl\Micrometa\Ports\Exceptions\OutOfBoundsException;
use Jkphl\Micrometa\Ports\Exceptions\RuntimeException;

/**
 * Abstract item list
 *
 * @package Jkphl\Micrometa
 * @subpackage Jkphl\Micrometa\Ports
 */
class ItemList implements ItemListInterface
{
    /**
     * Items
     *
     * @var ItemInterface[]
     */
    protected $items;

    /**
     * Internal pointer
     *
     * @var int
     */
    protected $pointer;

    /**
     * ItemList constructor
     *
     * @param ItemInterface[] $items Items
     * @api
     */
    public function __construct(array $items = [])
    {
        $this->items = array_values($items);
        $this->pointer = 0;
    }

    /**
     * Return the current item
     *
     * @return ItemInterface Item
     * @api
     */
    public function current()
    {
        return $this->items[$this->pointer];
    }

    /**
     * Move forward to next element
     *
     * @return void
     * @api
     */
    public function next()
    {
        ++$this->pointer;
    }

    /**
     * Return the position of the current element
     *
     * @return int Position of the current element
     * @api
     */
    public function key()
    {
        return $this->pointer;
    }

    /**
     * Checks if current position is valid
     *
     * @return boolean The current position is valid
     * @api
     */
    public function valid()
    {
        return isset($this->items[$this->pointer]);
    }

    /**
     * Rewind the item list to the first element
     *
     * @return void
     * @api
     */
    public function rewind()
    {
        $this->pointer = 0;
    }

    /**
     * Test if an offset exists
     *
     * @param int $offset Offset
     * @return boolean Offset exists
     * @api
     */
    public function offsetExists($offset)
    {
        return isset($this->items[$offset]);
    }

    /**
     * Return the item at a particular offset
     *
     * @param int $offset Offset
     * @return ItemInterface Item
     * @api
     */
    public function offsetGet($offset)
    {
        return $this->items[$offset];
    }

    /**
     * Set an item at a particular offset
     *
     * @param int $offset Offset
     * @param ItemInterface $value Item
     * @api
     */
    public function offsetSet($offset, $value)
    {
        throw new RuntimeException(RuntimeException::IMMUTABLE_ITEM_LIST_STR, RuntimeException::IMMUTABLE_ITEM_LIST);
    }

    /**
     * Delete an item at a particular offset
     *
     * @param int $offset Offset
     */
    public function offsetUnset($offset)
    {
        throw new RuntimeException(RuntimeException::IMMUTABLE_ITEM_LIST_STR, RuntimeException::IMMUTABLE_ITEM_LIST);
    }

    /**
     * Return an object representation of the item list
     *
     * @return \stdClass Micro information items
     */
    public function toObject()
    {
        return (object)[
            'items' => array_map(
                function (ItemInterface $item) {
                    return $item->toObject();
                }, $this->items
            )
        ];
    }

    /**
     * Return the first item, optionally of particular types
     *
     * @param array ...$types Item types
     * @return ItemInterface Item
     * @throws OutOfBoundsException If there are no matching items
     * @api
     */
    public function getFirstItem(...$types)
    {
        $items = $this->getItems(...$types);

        // If there are no matching items
        if (!count($items)) {
            throw new OutOfBoundsException(
                OutOfBoundsException::NO_MATCHING_ITEMS_STR,
                OutOfBoundsException::NO_MATCHING_ITEMS
            );
        }

        return $items[0];
    }

    /**
     * Return all items as an array, optionally filtered by item type(s)
     *
     * @param array ...$types Item types
     * @return ItemInterface[] Items matching the requested types
     * @api
     */
    public function getItems(...$types)
    {
        // If particular item types should be filtered
        if (count($types)) {
            return array_filter(
                $this->items,
                function (ItemInterface $item) use ($types) {
                    return $item->isOfType(...$types);
                }
            );
        }

        return $this->items;
    }

    /**
     * Return the number of items in this list
     *
     * @return int Number of items
     * @api
     */
    public function count()
    {
        return count($this->items);
    }

    /**
     * Generic item getter
     *
     * @param string $type Item type
     * @param array $arguments Arguments
     * @return ItemInterface Item
     * @throws InvalidArgumentException If the item index is invalid
     * @api
     */
    public function __call($type, $arguments)
    {
        $index = 0;
        if (count($arguments)) {
            // If the item index is invalid
            if (!is_int($arguments[0]) || ($arguments[0] < 0)) {
                throw new InvalidArgumentException(
                    sprintf(InvalidArgumentException::INVALID_ITEM_INDEX_STR, $arguments[0]),
                    InvalidArgumentException::INVALID_ITEM_INDEX
                );
            }

            $index = $arguments[0];
        }

        // Return the item by type and index
        return $this->getItemByTypeAndIndex($type, $index);
    }

    /**
     * Return an item by type and index
     *
     * @param string $type Item type
     * @param int $index Item index
     * @return ItemInterface Item
     * @throws OutOfBoundsException If the item index is out of bounds
     */
    protected function getItemByTypeAndIndex($type, $index)
    {
        $typeItems = $this->getItems($type);

        // If the item index is out of bounds
        if (count($typeItems) <= $index) {
            throw new OutOfBoundsException(
                sprintf(OutOfBoundsException::INVALID_ITEM_INDEX_STR, $index),
                OutOfBoundsException::INVALID_ITEM_INDEX
            );
        }

        return $typeItems[$index];
    }
}