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<?php
/**
 * A Zenphoto plugin that provides scriptless and privacy friendly sharing buttons for:
 * 
 * - Facebook
 * - Twitter
 * - Pinterest 
 * - Linkedin
 * - Xing
 * - Reddit
 * - Stumbleupon
 * - Tumblr
 * - WhatsApp (iOS only)
 * - Digg
 * - Livejournal 
 * - Buffer
 * - Delicious
 * - Evernote
 * - WordPress(.com)
 * - Pocket
 * - e-mail (static link to open the visitor's mail client)
 * 
 * Note: Since no scripts are involved no share counts!
 * 
 * To have it work correctly you should also enable the html_meta_tags plugin 
 * and check the Open Graph (og:) meta data elements in the plugin's options.
 *
 * The plugin loads default CSS styling using an icon font. If you wish to use theme based custom icons 
 * and CSS to avoid extra loading you can disable it.
 *
 * Icon font created using the icomoon app: http://icomoon.io/#icons-icomoon
 * Fonts used:
 * - Brankic 1979 (buffer/stack icon) http://brankic1979.com/icons/ (free for personal and commercial use)
 * - Entypo+ (evernote icon) http://www.entypo.com – CC BY-SA 4.0
 * - fontawesome (all other icons) http://fontawesome.io – SIL OFL 1.1 
 *
 * Usage:
 * Place <code><?php ScriptlessSocialSharing::printButtons(); ?></code> on your theme files where you wish the buttons to appear.
 *
 * @author Malte Müller (acrylian)
 * @copyright 2018 Malte Müller
 * @license GPL v3 or later
 * @package plugins
 * @subpackage scriptless-socialsharing
 */
$plugin_is_filter = 9 | THEME_PLUGIN;
$plugin_description = gettext('A Zenphoto plugin that provides scriptless and privacy friendly sharing buttons for Facebook, Twitter, Google+, Pinterest, Linkedin, Xing, Reddit, Stumbleupon, Tumblr, WhatsApp (iOS only) and e-mail. (Note: No share counts because of that!).');
$plugin_author = 'Malte Müller (acrylian)';
$plugin_category = gettext('Misc');
$option_interface = 'scriptlessSocialsharingOptions';
if (getOption('scriptless_socialsharing_iconfont')) {
    zp_register_filter('theme_head', 'scriptlessSocialsharing::CSS');
}

class scriptlessSocialsharingOptions {

    function __construct() {
        purgeOption('scriptless_socialsharing_gplus');
    }

    function getOptionsSupported() {
        $options = array(
                gettext('Social networks') => array(
                        'key' => 'scriptless_socialsharing_socialnetworks',
                        'type' => OPTION_TYPE_CHECKBOX_UL,
                        'order' => 0,
                        'checkboxes' => array(
                                'Facebook' => 'scriptless_socialsharing_facebook',
                                'Twitter' => 'scriptless_socialsharing_twitter',
                                'Pinterest' => 'scriptless_socialsharing_pinterest',
                                'Linkedin' => 'scriptless_socialsharing_linkedin',
                                'Xing' => 'scriptless_socialsharing_xing',
                                'Reddit' => 'scriptless_socialsharing_reddit',
                                'StumbleUpon' => 'scriptless_socialsharing_stumbleupon',
                                'Tumblr' => 'scriptless_socialsharing_tumblr',
                                'Whatsapp' => 'scriptless_socialsharing_whatsapp',
                                'Digg' => 'scriptless_socialsharing_digg',
                                'Livejournal' => 'scriptless_socialsharing_livejournal',
                                'Buffer' => 'scriptless_socialsharing_buffer',
                                'Delicious' => 'scriptless_socialsharing_delicious',
                                'Evernote' => 'scriptless_socialsharing_evernote',
                                'WordPress' => 'scriptless_socialsharing_wordpress',
                                'Pocket' => 'scriptless_socialsharing_pocket',
                                gettext('E-mail') => 'scriptless_socialsharing_email',
                        ),
                        'desc' => gettext('Select the social networks you wish buttons to appear for. Note: WhatsApp iOS only.')),
                gettext('Icon font and default CSS') => array(
                        'key' => 'scriptless_socialsharing_iconfont',
                        'type' => OPTION_TYPE_CHECKBOX,
                        'order' => 1,
                        'desc' => gettext("Uncheck to disable loading the included font and CSS and use your own theme based icon font and CSS.")),
                gettext('Icons only') => array(
                        'key' => 'scriptless_socialsharing_iconsonly',
                        'type' => OPTION_TYPE_CHECKBOX,
                        'order' => 1,
                        'desc' => gettext("Check to hide the service name and only show icon buttons.")),
                gettext('Twitter user name') => array(
                        'key' => 'scriptless_socialsharing_twittername',
                        'type' => OPTION_TYPE_TEXTBOX,
                        'order' => 1,
                        'desc' => gettext("Enter your Twitter name without @ here if you like to have it appended to tweets made."))
        );
        return $options;
    }

}

/**
 * Static class wrapper
 * 
 * @since 1.5
 */
class scriptlessSocialsharing {

    static function CSS() {
        ?>
            <link rel="stylesheet" href="<?php echo FULLWEBPATH . '/' . ZENFOLDER . '/' . PLUGIN_FOLDER; ?>/scriptless-socialsharing/style.min.css" type="text/css">
        <?php
    }
    
    /**
     * Gets an array with the buttons information
     *  
     * @param string $beforetext Text to be displayed before the sharing list. HTML code allowed. Default empty
     * @param string $customtext Custom text to share to override the internalt share text generation via current page
     * @return array
     */
    static function getButtons($beforetext = '', $customtext = null) {
        global $_zp_gallery_page, $_zp_current_album, $_zp_current_image, $_zp_current_zenpage_news, $_zp_current_zenpage_page, $_zp_current_category;
        $title = '';
        $desc = '';
        $url = '';
        $buttons = array();
        $gallerytitle = html_encode(getBareGallerytitle());
        $imgsource = '';
        switch ($_zp_gallery_page) {
            case 'index.php':
            case 'gallery.php':
                $url = getGalleryIndexURL();
                $title = (empty($customtext)) ? getBareGalleryTitle() : $customtext;
                break;
            case 'album.php':
                $url = $_zp_current_album->getLink();
                $title = (empty($customtext)) ? $_zp_current_album->getTitle() : $customtext;
                break;
            case 'image.php':
                $url = $_zp_current_image->getLink();
                $title = (empty($customtext)) ? $_zp_current_image->getTitle() : $customtext;
                break;
            case 'news.php':
                if (function_exists("is_NewsArticle")) {
                    if (is_NewsArticle()) {
                        $url = $_zp_current_zenpage_news->getLink();
                        $title = (empty($customtext)) ? $_zp_current_zenpage_news->getTitle() : $customtext;
                    } else if (is_NewsCategory()) {
                        $url = $_zp_current_category->getLink();
                        $title = (empty($customtext)) ? $_zp_current_category->getTitle() : $customtext;
                    } else {
                        $url = getNewsIndexURL();
                        $title = (empty($customtext)) ? getBareGalleryTitle() . ' - ' . gettext('News') : $customtext;
                    }
                }
                break;
            case 'pages.php':
                if (function_exists("is_Pages")) {
                    $url = $_zp_current_zenpage_page->getLink();
                    $title = (empty($customtext)) ? $_zp_current_zenpage_page->getTitle() : $customtext;
                }
                break;
            default: //static custom pages
                $url = getCustomPageURL(stripSuffix($_zp_gallery_page));
                if (empty($customtext)) {
                    // Handle some static custom pages we often have
                    switch ($_zp_gallery_page) {
                        case 'contact.php':
                            $title = gettext('Contact');
                            break;
                        case 'archive.php':
                            $title = gettext('Archive');
                            break;
                        case 'register.php':
                            $title = gettext('Register');
                            break;
                        case 'search.php':
                            $title = gettext('Search');
                            break;
                        default:
                            $title = strtoupper(stripSuffix($_zp_gallery_page));
                            break;
                    } 
                } else {
                    $title = $customtext;
                }
                break;
        }
        //override pagetitle with custom text
        if (empty($customtext)) {
            $title .= ' - ' . getBareGalleryTitle();
        }
        //$text = getContentShorten($title, 100, ' (…)', false);
        $title = urlencode($title);
        $url = urlencode(SERVER_HTTP_HOST . html_encode($url));
        if ($beforetext) {
            echo $beforetext;
        }
        if (getOption('scriptless_socialsharing_facebook')) {
            $buttons[] = array(
                    'class' => 'sharingicon-facebook-f',
                    'title' => 'facebook',
                    'url' => 'https://www.facebook.com/sharer/sharer.php?u=' . $url . '&amp;quote=' . $title
            );
        }
        if (getOption('scriptless_socialsharing_twitter')) {
            $via = '';
            if (getOption('scriptless_socialsharing_twittername')) {
                $via = '&amp;via=' . html_encode(getOption('scriptless_socialsharing_twittername'));
            }
            $buttons[] = array(
                    'class' => 'sharingicon-twitter',
                    'title' => 'Twitter',
                    'url' => 'https://twitter.com/intent/tweet?text=' . $title . $via . '&amp;url=' . $url
            );
        }
        if (getOption('scriptless_socialsharing_pinterest')) {
            $buttons[] = array(
                    'class' => 'sharingicon-pinterest-p',
                    'title' => 'Pinterest',
                    'url' => 'https://pinterest.com/pin/create/button/?url=' . $url . '&amp;description=' . $title . '&amp;media=' . $url
            );
        }
        if (getOption('scriptless_socialsharing_linkedin')) {
            $buttons[] = array(
                    'class' => 'sharingicon-linkedin',
                    'title' => 'Linkedin',
                    'url' => 'https://www.linkedin.com/shareArticle?mini=true&amp;url=' . $url . '>&amp;title=' . $title . '&amp;source=' . $url
            );
        }
        if (getOption('scriptless_socialsharing_xing')) {
            $buttons[] = array(
                    'class' => 'sharingicon-xing',
                    'title' => 'Xing',
                    'url' => 'https://www.xing-share.com/app/user?op=share;sc_p=xing-share;url=' . $url
            );
        }
        if (getOption('scriptless_socialsharing_reddit')) {
            $buttons[] = array(
                    'class' => 'sharingicon-reddit-alien',
                    'title' => 'Reddit',
                    'url' => 'https://reddit.com/submit?url=' . $url . '/?socialshare&amp;title=' . $title
            );
        }

        if (getOption('scriptless_socialsharing_stumbleupon')) {
            $buttons[] = array(
                    'class' => 'sharingicon-stumbleupon',
                    'title' => 'StumbleUpon',
                    'url' => 'https://www.stumbleupon.com/submit?url=' . $url . '&amp;title=' . $title
            );
        }
        if (getOption('scriptless_socialsharing_tumblr')) {
            $buttons[] = array(
                    'class' => 'sharingicon-tumblr',
                    'title' => 'Tumblr',
                    'url' => 'https://www.tumblr.com/share/link?url=' . $url . '&amp;name=' . $title
            );
        }
        if (getOption('scriptless_socialsharing_whatsapp')) { // must be hidden initially!
            $buttons[] = array(
                    'class' => 'sharingicon-whatsapp',
                    'title' => 'Whatsapp',
                    'url' => 'WhatsApp://send?text=' . $url
            );
        }
        if (getOption('scriptless_socialsharing_digg')) {
            $buttons[] = array(
                    'class' => 'sharingicon-digg',
                    'title' => 'Digg',
                    'url' => 'http://digg.com/submit?url=' . $url . '&amp;title=' . $title
            );
        }
        if (getOption('scriptless_socialsharing_livejournal')) {
            $buttons[] = array(
                    'class' => 'sharingicon-pencil',
                    'title' => 'Livejournal',
                    'url' => 'https://www.livejournal.com/update.bml?url=' . $url . '&amp;subject=' . $title
            );
        }
        if (getOption('scriptless_socialsharing_buffer')) {
            $buttons[] = array(
                    'class' => 'sharingicon-stack',
                    'title' => 'Buffer',
                    'url' => 'https://buffer.com/add?text=' . $url . '&amp;url=' . $url
            );
        }
        if (getOption('scriptless_socialsharing_delicious')) {
            $buttons[] = array(
                    'class' => 'sharingicon-delicious',
                    'title' => 'Delicious',
                    'url' => 'https://delicious.com/save?v=5&amp;provider=' . $gallerytitle . '&amp;noui&amp;jump=close&amp;url=' . $url . '&amp;title=' . $title
            );
        }
        if (getOption('scriptless_socialsharing_evernote')) {
            $buttons[] = array(
                    'class' => 'sharingicon-evernote',
                    'title' => 'Evernote',
                    'url' => 'https://www.evernote.com/clip.action?url=' . $url . '&amp;title=' . $title
            );
        }
        if (getOption('scriptless_socialsharing_wordpress')) {
            $buttons[] = array(
                    'class' => 'sharingicon-wordpress',
                    'title' => 'WordPress',
                    'url' => 'https://wordpress.com/press-this.php?u=' . $url . '&amp;t=' . $title
            );
        }
        if (getOption('scriptless_socialsharing_pocket')) {
            $buttons[] = array(
                    'class' => 'sharingicon-get-pocket',
                    'title' => 'Pocket',
                    'url' => 'https://getpocket.com/save?url=' . $url . '&amp;title=' . $title
            );
        }
        if (getOption('scriptless_socialsharing_email')) {
            $buttons[] = array(
                    'class' => 'sharingicon-envelope-o',
                    'title' => gettext('e-mail'),
                    'url' => 'mailto:?subject=' . $title . '&amp;body=' . $url
            );
        }
        return $buttons;
    }

    /**
     * Place this where you wish the buttons to appear. The plugin includes also jQUery calls to set the buttons up to allow multiple button sets per page.
     *  
     * @param string $text Text to be displayed before the sharing list. HTML code allowed. Default empty
     * @param string $customtext Custom text to share to override the internalt share text generation via current page
*/
    static function printButtons($text = '', $customtext = null, $iconsonly = null) {
        $buttons = self::getButtons($text, '', $customtext);
        if (is_null($iconsonly)) {
            $iconsonly = getOption('scriptless_socialsharing_iconsonly');
        }
        ?>
            <ul class="scriptless_socialsharing">
                <?php
                foreach ($buttons as $button) {
                    $li_class = '';
                    if ($button['class'] == 'sharingicon-whatsapp') {
                        $li_class = ' class="whatsappLink hidden"';
                    }
                    ?>
                    <li<?php echo $li_class; ?>>
                        <a class="<?php echo $button['class']; ?>" href="<?php echo $button['url']; ?>" title="<?php echo $button['title']; ?>" target="_blank">
                            <?php
                            if (!$iconsonly) {
                                echo $button['title'];
                            }
                            ?>
                        </a>
                    </li>
                    <?php 
                    if ($button['class'] == 'sharingicon-whatsapp') { ?>
                        <script>
                            (navigator.userAgent.match(/(iPhone)/g)) ? $('.whatsappLink').removeClass('hidden') : null;
                        </script>
                    <?php 
                    } 
                } ?>
            </ul>
        <?php
    }
}