<?php

// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id$

function wikiplugin_shorten_info()
{
    return [
        'name' => tra('Shorten'),
        'documentation' => 'Shorten',
        'description' => tra('Show/hide a portion of text'),
        'prefs' => ['wikiplugin_shorten', 'wikiplugin_button'],
        'body' => tra('Code to be displayed'),
        'iconname' => 'shorten',
        'introduced' => 17,
        'filter' => 'rawhtml_unsafe',
        'format' => 'html',
        'tags' => [ 'basic' ],
        'params' => [
            'length' => [
                'required' => true,
                'name' => tra('Length'),
                'description' => tra('Char length of always visible portion of text.'),
                'since' => '17',
                'filter' => 'digits',
            ],
            'moreText' => [
                'required' => false,
                'name' => tra('More text'),
                'description' => tra('A label indicating the text is expandable.'),
                'since' => '17',
                'filter' => 'text',
            ],
            'lessText' => [
                'required' => false,
                'name' => tra('Less text'),
                'description' => tra('A label for collapse text action.'),
                'since' => '17',
                'filter' => 'text',
            ],
            'show_speed' => [
                'required' => false,
                'name' => tra('Show Speed'),
                'filter' => 'alnum',
                'description' => tr('Speed of animation in milliseconds when showing content (%0200%1 is fast and
                    %0600%1 is slow. %01000%1 equals 1 second).', '<code>', '</code>'),
                'default' => 0,
                'since' => '17',
                'accepted' => tr(
                    'Integer greater than 0 and less than or equal to 1000, or %0 or %1',
                    '<code>fast</code>',
                    '<code>slow</code>'
                ),
                'advanced' => true,
            ],
            'hide_speed' => [
                'required' => false,
                'name' => tra('Hide Speed'),
                'filter' => 'alnum',
                'description' => tr('Speed of animation in milliseconds when hiding content (%0200%1 is fast and
                    %0600%1 is slow. %01000%1 equals 1 second).', '<code>', '</code>'),
                'default' => 0,
                'since' => '17',
                'accepted' => tr(
                    'Integer greater than 0 and less than or equal to 1000, or %0 or %1',
                    '<code>fast</code>',
                    '<code>slow</code>'
                ),
                'advanced' => true,
            ],

        ],
    ];
}

function wikiplugin_shorten($data, $params)
{
    static $shorten_count;
    $headerlib = TikiLib::lib('header');
    $parserlib = TikiLib::lib('parser');

    extract([
        'length' => 20,
        'moreText' => '[+]',
        'lessText' => '[-]',
        'show_speed' => 0,
        'hide_speed' => 0,
    ]);

    if (isset($params['length'])) {
        $length = (int) sprintf('%d', $params['length']);
        $length = max(1, $length);
    }

    if (isset($params['show_speed'])) {
        $show_speed = str_replace(['slow', 'fast'], ['600', '200'], $params['show_speed']);
        $show_speed = sprintf(' data-show-speed="%d"', $show_speed);
    }

    if (isset($params['hide_speed'])) {
        $hide_speed = str_replace(['slow', 'fast'], ['600', '200'], $params['hide_speed']);
        $hide_speed = sprintf(' data-hide-speed="%d"', $hide_speed);
    }

    $match = null;
    if (preg_match('/^\s*.{' . $length . '}[^\s]*/', $data, $match)) {
        if (! $shorten_count) {
            $headerlib->add_css(
                ".wikiplugin-shorten .content { display: none; }"
                . ".wikiplugin-shorten .btn_less, .wikiplugin-shorten .btn_more { cursor: pointer; margin-left: 0.5em; }"
                . ".wikiplugin-shorten .btn_less { display: none; }"
            );

            $headerlib->add_jq_onready(
                '$(".wikiplugin-shorten").each(function(){'
                . 'var $this = $(this);'
                . 'var $sample = $this.find("> .sample");'
                . 'var $content = $this.find("> .content");'
                . 'var show_speed = $this.data("show-speed") || 0;'
                . 'var hide_speed = $this.data("hide-speed") || 0;'

                . 'var $btn_more = $sample.find(".btn_more:first");'
                . 'var $btn_less = $content.find(".btn_less:last");'

                . '$btn_more.click(function(){'
                . '$sample.hide();'
                . '$btn_more.hide();'
                . '$btn_less.show();'
                . '$content.show(show_speed);'
                . 'return false;'
                . '});'

                . '$btn_less.click(function(){'
                . '$sample.show();'
                . '$btn_less.hide();'
                . '$btn_more.show();'
                . '$content.hide(hide_speed);'
                . 'return false;'
                . '});'
                . '});'
            );
        }

        $shorten_count += 1;

        if (isset($params['moreText'])) {
            $moreText = strip_tags($params['moreText']);
        }

        if (isset($params['lessText'])) {
            $lessText = strip_tags($params['lessText']);
        }

        $html = '<div class="wikiplugin-shorten"' . $show_speed . $hide_speed . '>';
        $html .= '<div class="sample"  data-btn-more="' . $moreText . '">%s</div>';
        $html .= '<div class="content" data-btn-less="' . $lessText . '">%s</div>';
        $html .= '</div>';

        $index = strlen($match[0]);

        $sample = $parserlib->parse_data_plugin(substr($data, 0, $index));
        $sample .= '<a href="#" class="btn_more btn btn-primary">' . $moreText . '</a>';

        $content = $parserlib->parse_data_plugin($data) . '<a href="#" class="btn_less btn btn-primary">' . $lessText . '</a>';

        $out = sprintf($html, $sample, $content);
        return $out;
    } else {        // short enough already
        return $parserlib->parse_data_plugin($data);
    }
}