<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014-2020 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
 * Website: https://www.espocrm.com
 *
 * EspoCRM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * EspoCRM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\EntryPoints;

use Espo\Core\Exceptions\NotFound;
use Espo\Core\Exceptions\Forbidden;
use Espo\Core\Exceptions\BadRequest;
use Espo\Core\Exceptions\Error;

use Espo\Core\EntryPoints\NotStrictAuth;
use Espo\Core\Di;

use Espo\Core\Api\Request;

class Avatar extends Image implements Di\MetadataAware
{
    use Di\MetadataSetter;
    use NotStrictAuth;

    protected $systemColor = '#a4b5bd';

    protected $colorList = [
        [111,168,214],
        [237,197,85],
        [212,114,155],
        '#8093BD',
        [124,196,164],
        [138,124,194],
        [222,102,102],
        '#ABE3A1',
        '#E8AF64',
    ];

    protected function getColor($hash)
    {
        $length = strlen($hash);
        $sum = 0;
        for ($i = 0; $i < $length; $i++) {
            $sum += ord($hash[$i]);
        }
        $x = intval($sum % 128) + 1;

        $colorList = $this->metadata->get(['app', 'avatars', 'colorList']) ?? $this->colorList;

        $index = intval($x * count($colorList) / 128);
        return $colorList[$index];
    }

    public function run(Request $request)
    {
        $userId = $request->get('id');
        $size = $request->get('size') ?? null;

        if (!$userId) {
            throw new BadRequest();
        }

        $user = $this->entityManager->getEntity('User', $userId);
        if (!$user) {
            header('Content-Type: image/png');
            $img  = imagecreatetruecolor(14, 14);
            imagesavealpha($img, true);
            $color = imagecolorallocatealpha($img, 127, 127, 127, 127);
            imagefill($img, 0, 0, $color);
            imagepng($img);
            imagecolordeallocate($img, $color);
            imagedestroy($img);
            exit;
        }

        $id = $user->get('avatarId');

        if (!empty($id)) {
            $this->show($id, $size, true);
        } else {
            $identicon = new \Identicon\Identicon();
            if (empty($size)) {
                $size = 'small';
            }
            if (!empty($this->imageSizes[$size])) {
                $width = $this->imageSizes[$size][0];

                header('Cache-Control: max-age=360000, must-revalidate');
                header('Content-Type: image/png');

                $hash = $userId;
                $color = $this->getColor($userId);
                if ($hash === 'system') {
                    $color = $this->metadata->get(['app', 'avatars', 'systemColor']) ?? $this->systemColor;
                }

                $imgContent = $identicon->getImageData($hash, $width, $color);
                echo $imgContent;
                exit;
            }
        }
    }
}