<?php
/**
 * This file contains all functions of the tp_icons class
 * @package teachpress\core\icons
 * @license http://www.gnu.org/licenses/gpl-2.0.html GPLv2 or later
 * @since 7.0
 */

/**
 * This class contains some function around icon usage
 * @package teachpress\core\icons
 * @since 7.0
 */
class TP_Icons {
    
    /**
     * Returns the suitable icon classes for a given file_path or URL
     * @param string $url_link
     * @return string
     * @since 7.0
     */
    public static function get_class ($url_link) {
        $file_endings = self::files();
        $web_services = self::web();
        
        $file_end = substr($url_link,-4,4);
        preg_match( "/^(https?:\/\/)?(.+)$/", $url_link, $urltype);
        $urltype = preg_split("#/#", $urltype[2])[0];
        $urltype = explode(".", $urltype);
        if ( count($urltype)-2 > 0 ) {
            $urltype = $urltype[count($urltype)-2].".".end($urltype);
        }
        else {
            $urltype = $urltype[0].".".end($urltype);
        }
        
        // if it's a file
        if ( isset ($file_endings[$file_end]) ) {
            return $file_endings[$file_end];
        }
        // or a web service
        elseif ( isset ($web_services[$urltype]) ) {
            return $web_services[$urltype];
        }
        // default
        else {
            return 'fas fa-globe';
        }
    }

    /**
     * Returns an array with file endings and their suitable font awesome class names
     * @return string
     * @since 7.0
     */
    private static function files () {
        $file = array(
            'doi' => 'ai ai-doi',
            '.pdf' => 'fas fa-file-pdf',
            '.doc' => 'fas fa-file-word',
            'docx' => 'fas fa-file-word',
            '.ppt' => 'fas fa-file-powerpoint',
            'pptx' => 'fas fa-file-powerpoint',
            '.xls' => 'fas fa-file-excel',
            'xlsx' => 'fas fa-file-excel',
            '.odt' => 'fas fa-file-word',
            '.ods' => 'fas fa-file-excel',
            '.odp' => 'fas fa-file-powerpoint',
            '.odf' => 'fas fa-file-code',
            '.odg' => 'fas fa-file-contract',
            '.odc' => 'fas fa-file-contract',
            '.odi' => 'fas fa-file-contract',
            '.rtf' => 'fas fa-file-alt',
            '.rdf' => 'fas fa-file-alt',
            '.txt' => 'fas fa-file-alt',
            '.tex' => 'fas fa-file-alt',
            'html' => 'fas fa-globe',
            'htm' => 'fas fa-globe',
            '.php' => 'fab fa-php',
            '.xml' => 'fas fa-file-code',
            '.css' => 'fas fa-file-code',
            '.py' => 'fas fa-file-code',
            '.ipynb' => 'fas fa-file-code',
            '.csv' => 'fas fa-file-csv',
            '.dat' => 'fas fa-file-alt',
            '.db' => 'fas fa-database',
            '.dbf' => 'fas fa-database',
            '.log' => 'fas fa-file-alt',
            '.mdb' => 'fas fa-database',
            '.sql' => 'fas fa-database',
            '.sav' => 'fas fa-file-alt',
            '.sav' => 'fas fa-file-alt',
            '.mid' => 'fas fa-file-audio',
            '.midi' => 'fas fa-file-audio',
            '.mp3' => 'fas fa-file-audio',
            '.ogg' => 'fas fa-file-audio',
            '.wma' => 'fas fa-file-audio',
            '.wav' => 'fas fa-file-audio',
            '.wpl' => 'fas fa-file-audio',
            '.ai' => 'fas fa-file-image',
            '.bmp' => 'fas fa-file-image',
            '.gif' => 'fas fa-file-image',
            '.ico' => 'fas fa-file-image',
            '.jpg' => 'fas fa-file-image',
            '.jpeg' => 'fas fa-file-image',
            '.png' => 'fas fa-file-image',
            '.psd' => 'fas fa-file-image',
            '.svg' => 'fas fa-file-image',
            '.dvi' => 'fas fa-file-image',
            '.tif' => 'fas fa-file-image',
            '.tiff' => 'fas fa-file-image',
            '.3g2' => 'fas fa-file-video',
            '.3gp' => 'fas fa-file-video',
            '.avi' => 'fas fa-file-video',
            '.flv' => 'fas fa-file-video',
            '.h264' => 'fas fa-file-video',
            '.m4v' => 'fas fa-file-video',
            '.mkv' => 'fas fa-file-video',
            '.mov' => 'fas fa-file-video',
            '.mp4' => 'fas fa-file-video',
            '.wmv' => 'fas fa-file-video',
            '.mpg' => 'fas fa-file-video',
            '.mpeg' => 'fas fa-file-video',
            '.wmv' => 'fas fa-file-video',
            '.7z' => 'fas fa-file-archive',
            '.arj' => 'fas fa-file-archive',   
            '.deb' => 'fas fa-file-archive',
            '.pkg' => 'fas fa-file-archive',
            '.rar' => 'fas fa-file-archive',
            '.rpm' => 'fas fa-file-archive',
            '.tar.gz' => 'fas fa-file-archive',
            '.gz' => 'fas fa-file-archive',     
            '.zip' => 'fas fa-file-archive',
        );
        return $file;
    }
    
    /**
     * Returns an array with web services and their suitable font awesome class names
     * @return string
     * @since 7.0
     */
    private static function web () {
        $web = array(
            'arxiv.org' => 'ai ai-arxiv',
            'osf.io' => 'ai ai-osf',
            'github.com' => 'fab fa-github',
            'gitlab.com' => 'fab fa-gitlab',
            'mendeley.com' => 'ai ai-mendeley',
            'overleaf.com' => 'ai ai-overleaf',
            'soundcloud.com' => 'fab fa-soundcloud',
            'slideshare.net' => 'fab fa-slideshare',
            'vimeo.com' => 'fab fa-vimeo-v',
            'wikipedia.org' => 'fab fa-wikipedia-w',
            'wordpress.com' => 'fab fa-wordpress',
            'youtu.be' => 'fab fa-youtube',
            'youtube.com' => 'fab fa-youtube',
        );
        return $web;
    }
}