background.php

<?php
namespace Bitrix\Landing\Hook\Page;
 
use Bitrix\Landing\Field;
use Bitrix\Landing\File;
use Bitrix\Landing\Manager;
use Bitrix\Landing\PublicAction;
use Bitrix\Main\Localization\Loc;
use Bitrix\Main\Page\Asset;
 
Loc::loadMessages(__FILE__);
 
class Background extends \Bitrix\Landing\Hook\Page
{
    protected function getMap()
    {
        return array(
            'USE' => new Field\Checkbox('USE', array(
                'title' => Loc::getMessage('LANDING_HOOK_BG_USE'),
                'help' => Loc::getMessage('LANDING_HOOK_BG_DESCRIPTION'),
            )),
            'PICTURE' => new Field\Hidden('PICTURE', array(
                'title' => Loc::getMessage('LANDING_HOOK_BG_PICTURE'),
                'fetch_data_modification' => function($value)
                {
                    if (PublicAction::restApplication())
                    {
                        if ($value > 0)
                        {
                            $path = File::getFilePath($value);
                            if ($path)
                            {
                                $path = Manager::getUrlFromFile($path);
                                return $path;
                            }
                        }
                    }
                    return $value;
                }
            )),
            'POSITION' => new Field\Select('POSITION', array(
                'title' => Loc::getMessage('LANDING_HOOK_BG_POSITION'),
                'help' => Loc::getMessage('LANDING_HOOK_BG_POSITION_HELP_3'),
                'htmlHelp' => true,
                'options' => array(
                    'center' => Loc::getMessage('LANDING_HOOK_BG_POSITION_CENTER_2'),
                    'repeat' => Loc::getMessage('LANDING_HOOK_BG_POSITION_REPEAT_2'),
                    'center_repeat_y' => Loc::getMessage('LANDING_HOOK_BG_POSITION_CENTER_REPEAT_Y'),
                    'no_repeat' => Loc::getMessage('LANDING_HOOK_BG_POSITION_CENTER_NO_REPEAT'),
                )
            )),
            'COLOR' => new Field\Text('COLOR', array(
                'title' => Loc::getMessage('LANDING_HOOK_BG_COLOR')
            )),
        );
    }
 
    public function getTitle()
    {
        return Loc::getMessage('LANDING_HOOK_BG_NAME');
    }
 
    public function getDescription(): string
    {
        return Loc::getMessage('LANDING_HOOK_BG_DESCRIPTION');
    }
 
    public function enabled()
    {
        if ($this->issetCustomExec())
        {
            return true;
        }
 
        return $this->fields['USE']->getValue() == 'Y';
    }
 
    public function exec()
    {
        if ($this->execCustom())
        {
            return;
        }
 
        $picture = \htmlspecialcharsbx(trim($this->fields['PICTURE']->getValue()));
        $color = \htmlspecialcharsbx(trim($this->fields['COLOR']->getValue()));
        $position = trim($this->fields['POSITION']->getValue());
 
        $this->setBackground($picture, $color, $position);
    }
 
    public static function setBackground(?string $picture, ?string $color = null, ?string $position = null): void
    {
        if ($picture && is_numeric($picture) && (int)$picture > 0)
        {
            $picture = \htmlspecialcharsbx(
                File::getFilePath((int)$picture)
            );
        }
 
        if ($picture)
        {
            if ($position === 'center')
            {
                Asset::getInstance()->addString(
                    '<style type="text/css">
                        body {
                            background-image: url("' . $picture . '");
                            background-attachment: fixed;
                            background-size: cover;
                            background-position: center;
                            background-repeat: no-repeat;
                        }
                        .bx-ios.bx-touch body:before {
                            content: "";
                            background-image: url("' . $picture . '");
                            background-position: center;
                            background-size: cover;
                            position: fixed;
                            left: 0;
                            right: 0;
                            top: 0;
                            bottom: 0;
                            z-index: -1;
                        }
                        .bx-ios.bx-touch body {
                            background-image: none;
                        }
                    </style>'
                );
            }
            elseif ($position === 'repeat')
            {
                Asset::getInstance()->addString(
                    '<style type="text/css">
                        body {
                            background-image: url("' . $picture . '");
                            background-attachment: fixed;
                            background-position: center;
                            background-repeat: repeat;
                        }
                    </style>'
                );
            }
            elseif ($position === 'no_repeat')
            {
                Asset::getInstance()->addString(
                    '<style type="text/css">
                        body {
                            background-image: url("' . $picture . '");
                            background-size: 100%;
                            background-attachment: fixed;
                            background-position: top center;
                            background-repeat: no-repeat;
                        }
                    </style>'
                );
            }
            else
            {
                Asset::getInstance()->addString(
                    '<style type="text/css">
                        body {
                            background-image: url("' . $picture . '");
                            background-attachment: scroll;
                            background-position: top;
                            background-repeat: repeat-y;
                            background-size: 100%;
                        }
                    </style>'
                );
            }
        }
 
        if ($color)
        {
            Asset::getInstance()->addString(
                '<style type="text/css">
                    body {
                        background-color: ' . $color . '!important;
                    }
                </style>'
            );
        }
    }
}