chain.php

<?php
namespace Bitrix\Sender\Entity;
 
use Bitrix\Main\Localization\Loc;
use Bitrix\Sender\Internals\Model;
 
Loc::loadMessages(__FILE__);
 
class Chain
{
    protected $letters = [];
 
    protected $removeLetterList = [];
 
    public function getList()
    {
        return $this->letters;
    }
 
    public function getLast()
    {
        $letter = end($this->letters);
        reset($this->letters);
 
        return $letter;
    }
 
    public function getLetter($letterId)
    {
        foreach ($this->letters as $letter)
        {
            if ($letter->getId() == $letterId)
            {
                return $letter;
            }
        }
 
        return null;
    }
 
    public function addLetter($letterId)
    {
        if ($this->getLetter($letterId))
        {
            return $this;
        }
 
        $letter = self::createInstanceById($letterId);
        if ($letter)
        {
            $this->letters[] = $letter;
            $this->sort();
        }
 
        return $this;
    }
 
    public function shiftTime($letterId, $timeShift = 0)
    {
        $letter = $this->getLetter($letterId);
        if ($letter)
        {
            $letter->set('TIME_SHIFT', $timeShift);
        }
 
        return $this;
    }
 
    public function removeLetter($letterId)
    {
        $list = [];
        foreach ($this->letters as $letter)
        {
            if ($letter->getId() == $letterId)
            {
                $this->removeLetterList[] = $letterId;
                continue;
            }
 
            $list[] = $letter;
        }
        $this->letters = $list;
        $this->sort();
 
        return $this;
    }
 
    public function moveUp($letterId)
    {
        return $this->move($letterId, -1);
    }
 
    public function moveDown($letterId)
    {
        return $this->move($letterId, 1);
    }
 
    public function sort()
    {
        $parentId = null;
        foreach ($this->letters as $letter)
        {
            $letter->set('PARENT_ID', $parentId);
            $parentId = $letter->getId();
        }
 
        return $this;
    }
 
    public function save()
    {
        foreach ($this->letters as $letter)
        {
            $letter->save();
        }
 
        foreach ($this->removeLetterList as $letterId)
        {
            Letter::removeById($letterId);
        }
        $this->removeLetterList = [];
 
        return $this;
    }
 
    public function load($id)
    {
        $list = Model\LetterTable::getList([
            'select' => ['ID', 'PARENT_ID'],
            'filter' => ['=CAMPAIGN_ID' => $id],
        ])->fetchAll();
 
        $limiter = 100;
        $parentId = null;
        while (--$limiter > 0)
        {
            $id = self::getIdByParentId($list, $parentId);
            if (!$id)
            {
                break;
            }
 
            $letter = self::createInstanceById($id);
            if (!$letter)
            {
                continue;
            }
 
            $this->letters[] = $letter;
            $parentId = $id;
        }
 
        return $this;
    }
 
    protected static function createInstanceById($id)
    {
        $letter = Letter::createInstanceById($id);
        if ($letter)
        {
            $letter->load($id);
        }
 
        return $letter->getId() ? $letter : null;
    }
 
    protected static function getIdByParentId(array $list, $parentId = null)
    {
        foreach ($list as $item)
        {
            if ($item['PARENT_ID'] == $parentId)
            {
                return $item['ID'];
                break;
            }
        }
 
        return null;
    }
 
    protected function move($letterId, $offset)
    {
        $letter = $this->getLetter($letterId);
        if (!$letter)
        {
            return $this;
        }
 
        $index = array_search($letter, $this->letters, true);
        $previousIndex = $index + $offset;
        if (!isset($this->letters[$previousIndex]))
        {
            return $this;
        }
        $previousLetter = $this->letters[$previousIndex];
 
        $this->letters[$previousIndex] = $letter;
        $this->letters[$index] = $previousLetter;
 
        $this->sort();
 
        return $this;
    }
}