<?php

declare(strict_types=1);

/**
 * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
 *
 * Copyright (C) 2019 Jan Böhmer (https://github.com/jbtronics)
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

namespace App\Services;

use App\Entity\Attachments\Attachment;
use function in_array;
use InvalidArgumentException;

class FAIconGenerator
{
    protected const EXT_MAPPING = [
        'fa-file-pdf' => ['pdf'],
        'fa-file-image' => Attachment::PICTURE_EXTS,
        'fa-file-alt' => ['txt', 'md', 'rtf', 'log', 'rst', 'tex'],
        'fa-file-csv' => ['csv'],
        'fa-file-word' => ['doc', 'docx', 'odt'],
        'fa-file-archive' => ['zip', 'rar', 'bz2', 'tar', '7z', 'gz'],
        'fa-file-audio' => ['mp3', 'wav', 'aac', 'm4a', 'wma'],
        'fa-file-powerpoint' => ['ppt', 'pptx', 'odp', 'pps', 'key'],
        'fa-file-excel' => ['xls', 'xlr', 'xlsx', 'ods'],
        'fa-file-code' => ['php', 'xml', 'html', 'js', 'ts', 'htm', 'c', 'cpp'],
        'fa-file-video' => ['webm', 'avi', 'mp4', 'mkv', 'wmv'],
    ];

    /**
     * Gets the Font awesome icon class for a file with the specified extension.
     * For example 'pdf' gives you 'fa-file-pdf'.
     *
     * @param string $extension The file extension (without dot). Must be ASCII chars only!
     *
     * @return string The fontawesome class with leading 'fa-'
     */
    public function fileExtensionToFAType(string $extension): string
    {
        if ('' === $extension) {
            throw new InvalidArgumentException('You must specify an extension!');
        }
        //Normalize file extension
        $extension = strtolower($extension);
        foreach (self::EXT_MAPPING as $fa => $exts) {
            if (in_array($extension, $exts, true)) {
                return $fa;
            }
        }

        // When the extension is not found in the mapping array, we return the generic icon
        return 'fa-file';
    }

    /**
     * Returns HTML code to show the given fontawesome icon.
     * E.g. <i class="fas fa-file-text"></i>.
     *
     * @param string $icon_class The icon which should be shown (e.g. fa-file-text)
     * @param string $style      The style of the icon 'fas'
     * @param string $options    Any other css class attributes like size, etc.
     *
     * @return string The final html
     */
    public function generateIconHTML(string $icon_class, string $style = 'fas', string $options = ''): string
    {
        //XSS protection
        $icon_class = htmlspecialchars($icon_class);
        $style = htmlspecialchars($style);
        $options = htmlspecialchars($options);

        return sprintf(
            '<i class="%s %s %s"></i>',
            $style,
            $icon_class,
            $options
        );
    }
}
