<?php
/**
 * Observium
 *
 *   This file is part of Observium.
 *
 * @package        observium
 * @subpackage     web
 * @copyright  (C) 2006-2013 Adam Armstrong, (C) 2013-2023 Observium Limited
 *
 */

/**
 * Generate search form
 *
 * generates a search form.
 * types allowed: select, multiselect, text (or input), datetime, newline
 *
 * Example of use:
 *  - array for 'select' item type
 *  $search[] = array('type'    => 'select',          // Type
 *                    'name'    => 'Search By',       // Displayed title for item
 *                    'id'      => 'searchby',        // Item id and name
 *                    'width'   => '120px',           // (Optional) Item width
 *                    'size'    => '15',              // (Optional) Maximum number of items to show in the menu (default 15)
 *                    'value'   => $vars['searchby'], // (Optional) Current value(-s) for item
 *                    'values'  => array('mac' => 'MAC Address',
 *                                       'ip'  => 'IP Address'));  // Array with option items
 *  - array for 'multiselect' item type (array keys same as above)
 *  $search[] = array('type'    => 'multiselect',
 *                    'name'    => 'Priorities',
 *                    'id'      => 'priority',
 *                    'width'   => '150px',
 *                    'subtext' => TRUE,              // (Optional) Display items value right of the item name
 *                    'encode'  => FALSE,             // (Optional) Use var_encode for values, use when values contains commas or empty string
 *                    'value'   => $vars['priority'],
 *                    'values'  => $priorities);
 *  - array for 'text' or 'input' item type
 *  $search[] = array('type'  => 'text',
 *                    'name'  => 'Address',
 *                    'id'    => 'address',
 *                    'width' => '120px',
 *                    'placeholder' => FALSE,         // (Optional) Display item name as pleseholder or left relatively input
 *                    'value' => $vars['address']);
 *  - array for 'datetime' item type
 *  $search[] = array('type'  => 'datetime',
 *                    'id'    => 'timestamp',
 *                    'presets' => TRUE,                  // (optional) Show select field with timerange presets
 *                    'min'   => dbFetchCell('SELECT MIN(`timestamp`) FROM `syslog`'), // (optional) Minimum allowed date/time
 *                    'max'   => dbFetchCell('SELECT MAX(`timestamp`) FROM `syslog`'), // (optional) Maximum allowed date/time
 *                    'from'  => $vars['timestamp_from'], // (optional) Current 'from' value
 *                    'to'    => $vars['timestamp_to']);  // (optional) Current 'to' value
 *  - array for 'sort' item pseudo type
 *  $search[] = array('type'   => 'sort',
 *                    'value'  => $vars['sort'],
 *                    'values' => $sorts);
 *  - array for 'newline' item pseudo type
 *  $search[] = array('type' => 'newline',
 *                    'hr'   => FALSE);                   // (optional) show or not horizontal line
 *  print_search($search, 'Title here', 'search', url);
 *
 * @param array       $data
 * @param string|null $title
 * @param string      $button
 * @param string|null $url
 *
 * @return void
 */
function print_search($data, $title = NULL, $button = 'search', $url = NULL)
{
    // Cache permissions to session var
    permissions_cache_session();
    //r($_SESSION['cache']);

    $submit_by_key = FALSE;
    $string_items  = '';
    foreach ($data as $item) {
        if ($url && isset($item['id'])) {
            // Remove old vars from url
            $url = preg_replace('/' . $item['id'] . '=[^\/]+\/?/', '', $url);
        }
        if ($item['type'] == 'sort') {
            $sort = $item;
            continue;
        } elseif (isset($item['submit_by_key']) && $item['submit_by_key']) {
            $submit_by_key = TRUE;
        }
        $string_items .= generate_form_element($item);
    }

    $form_id = 'search-' . random_string('4');

    if ($submit_by_key) {
        $action = '';
        if ($url) {
            $action .= 'this.form.prop(\'action\', form_to_path(\'' . $form_id . '\'));';
        }
        register_html_resource('script', '$(function(){$(\'form#' . $form_id . '\').each(function(){$(this).find(\'input\').keypress(function(e){if(e.which==10||e.which==13){' . $action . 'this.form.submit();}});});});');
    }

    // Form header
    $string = PHP_EOL . '<!-- START search form -->' . PHP_EOL;
    $string .= '<form method="POST" action="' . $url . '" class="form-inline" id="' . $form_id . '">' . PHP_EOL;
    $string .= '<div class="navbar">' . PHP_EOL;
    $string .= '<div class="navbar-inner">';
    $string .= '<div class="container">';
    if (isset($title)) {
        $string .= '  <a class="brand">' . escape_html($title) . '</a>' . PHP_EOL;
    }

    $string .= '<div class="nav" style="margin: 5px 0 5px 0;">';

    // Main
    $string .= $string_items;

    $string .= '</div>';

    // Form footer
    /// FIXME. I don't know how to put this buttons to middle or bottom..
    $string .= '    <div class="nav pull-right"';

    //$button_style = 'line-height: 20px;';
    $button_style = '';
    // Add sort switcher if present
    if (isset($sort)) {
        $string .= ' style="margin: 5px 0 5px 0;">' . PHP_EOL;
        $string .= '      <select name="sort" id="sort" class="selectpicker pull-right" title="Sort Order" style="width: 150px;" data-width="150px">' . PHP_EOL;
        foreach ($sort['values'] as $item => $name) {
            if (!$sort['value']) {
                $sort['value'] = $item;
            }
            $string .= '        <option value="' . $item . '"';
            if ($sort['value'] == $item) {
                $string .= ' data-icon="' . $GLOBALS['config']['icon']['sort'] . '" selected';
            }
            $string .= '>' . $name . '</option>';
        }
        $string       .= '      </select><br />' . PHP_EOL;
        $button_style .= ' margin-top: 7px;';
    } else {
        $string .= '>' . PHP_EOL;
    }

    // Note, script submitURL() stored in js/observium.js
    $button_type    = 'submit';
    $button_onclick = '';
    if ($url) {
        $button_type    = 'button';
        $button_onclick = " onclick=\"form_to_path('" . $form_id . "');\"";
    }

    $string .= '      <button type="' . $button_type . '" class="btn btn-default pull-right" style="' . $button_style . '"' . $button_onclick . '>';
    switch ($button) {
        // Note. 'update' - use POST request, all other - use GET with generate url from js.
        case 'update':
            $string .= get_icon('icon-refresh') . '&nbsp;Update</button>' . PHP_EOL;
            break;
        default:
            $string .= get_icon('icon-search') . '&nbsp;Search</button>' . PHP_EOL;
    }
    $string .= '    </div>' . PHP_EOL;
    $string .= '</div></div></div></form>' . PHP_EOL;
    $string .= '<!-- END search form -->' . PHP_EOL . PHP_EOL;

    // Print search form
    echo($string);
}

// Just callback functions to print_form with $return flag
function generate_form($data)
{
    return print_form($data, TRUE);
}

function generate_form_box($data)
{
    return print_form_box($data, TRUE);
}

/**
 * Calculate and store default grid sizes for form rows based on the given data.
 *
 * @param array $data Input data containing form row and element information
 */
function form_grid_calculate(&$data)
{
    // Calculate grid sizes for rows
    foreach ($data['row'] as $k => $row) {
        $row_count = safe_count($row);
        // Default (auto) grid size for elements
        $row_grid   = (int)(12 / $row_count);
        $grid_count = 0; // Count for custom passed grid sizes
        foreach ($row as $id => $element) {
            if (isset($element['div_class']) && preg_match('/col-(?:lg|md|sm)-(\d+)/', $element['div_class'], $matches)) {
                // Class with col size passed
                $grid_count += (int)$matches[1];
            } elseif (isset($element['grid'])) {
                // Grid size passed
                if ($element['grid'] > 0 && $element['grid'] <= 12) {
                    $grid_count += (int)$element['grid'];
                } else {
                    // Incorrect size
                    unset($row[$k]['grid']);
                }
            }
        }
        $row_grid = 12 - $grid_count;                            // Free grid size after custom grid
        $row_grid = (int)($row_grid / $row_count);               // Default (auto) grid size for elements
        if ($grid_count > 2 && $row_grid < 1) {
            $row_grid = 1;
        } // minimum 1 for auto if custom grid passed
        elseif ($row_grid < 2) {
            $row_grid = 2;
        } // minimum 2 for auto

        $data['grid'][$k] = $row_grid;                           // Store default grid size for row
    }
}

/**
 * Pretty form generator
 *
 * Form options:
 *   id     - form id, default is auto generated
 *   type   - rows (multiple elements with small amount of rows), horizontal (mostly single element per row), simple (raw form without any grid/divs)
 *   brand  - only for rows, adds "other" form title (I think not work and obsolete)
 *   title  - displayed form title (only for rows and horizontal)
 *   icon   - adds icon to title
 *   class  - adds div with class (default box box-solid) in horizontal
 *   space  - adds style for base div in rows type and horizontal with box box-solid class (padding: xx) and horizontal type with box class (padding-top: xx)
 *   style  - adds style for base form element, default (margin-bottom:0;)
 *   url    - form action url, if url set and submit element with id "search" used (or submit_by_key), than form send params as GET query
 *   submit_by_key - send form query by press enter key in text/input forms
 *   fieldset - horizontal specific, array with fieldset names and descriptions, in form element should be add fieldset option with same key name
 *
 * Elements options see in generate_form_element() description
 *
 * @param array $data   Form options and form elements
 * @param bool  $return If used and set to TRUE, print_form() will return form html instead of outputting it.
 *
 * @return NULL
 */
function print_form($data, $return = FALSE)
{
    // Just return if safety requirements are not fulfilled
    if (isset($data['userlevel']) && $data['userlevel'] > $_SESSION['userlevel']) {
        return;
    }

    // Return if the user doesn't have write permissions to the relevant entity
    if (isset($data['entity_write_permit']) &&
        !is_entity_write_permitted($data['entity_write_permit']['entity_id'], $data['entity_write_permit']['entity_type'])) {
        return;
    }

    // Time our form filling.
    $form_start = microtime(TRUE);

    $form_id    = (isset($data['id']) ? $data['id'] : 'form-' . random_string());
    $form_class = 'form form-inline'; // default for rows and simple
    if (isset($data['style'])) {
        $form_style = ' style="' . $data['style'] . '"';
    } else {
        $form_style = ' style="margin-bottom: 0px;"';
    }
    $base_class = array_key_exists('class', $data) ? $data['class'] : OBS_CLASS_BOX;
    $base_space = $data['space'] ?: '5px';
    $used_vars  = [];

    // Cache permissions to session var
    permissions_cache_session();

    if ($data['submit_by_key']) {
        $action = '';
        if ($data['url']) {
            $action .= 'this.form.prop("action", form_to_path("' . $form_id . '"));';
        }

        register_html_resource('script', '
        $(document).ready(function() {
            $("form#' . $form_id . '").on("keypress", "input", function(e) {
                if (e.which === 10 || e.which === 13) {
                    ' . $action . '
                    this.form.submit();
                }
            });
        });
    ');
    }

    // Form elements
    if ($data['type'] === 'rows') {
        // Rows form, see example in html/pages/devices.inc.php

        $div_padding = 'padding: ' . $base_space . ' !important;';
        if (str_contains_array($base_class, 'box')) {
            $base_space = ($data['space'] ? $data['space'] : '10px');

            // Box horizontal style
            $box_args = [
              'id'            => 'box-' . $form_id,
              'header-border' => TRUE,
              'body-style'    => $div_padding
            ];
            if (isset($data['title'])) {
                $box_args['title'] = $data['title'];
            }
            $div_begin = generate_box_open($box_args);
            $div_end   = generate_box_close();
            unset($box_args);
        } else {
            $div_begin = '<div class="' . $base_class . '" style="' . $div_padding . '">' . PHP_EOL;
            $div_end   = '</div>' . PHP_EOL;
        }
        $row_style       = '';
        $string_elements = '';

        form_grid_calculate($data);

        foreach ($data['row'] as $k => $row) {
            $row_class = 'row';
            if (isset($data['row_options'][$k])) {
                if ($data['row_options'][$k]['class']) {
                    $row_class .= ' ' . $data['row_options'][$k]['class'];
                }
            }
            $string_elements .= '  <div class="' . $row_class . '" ' . $row_style . '> <!-- START row-' . $k . ' -->' . PHP_EOL;
            foreach ($row as $id => $element) {
                $used_vars[]   = $id;
                $element['id'] = $id;

                // Default class with default row grid size or passed from options
                $grid      = (isset($element['grid']) ? $element['grid'] : $data['grid'][$k]);
                $div_class = 'col-lg-' . $grid . ' col-md-' . $grid . ' col-sm-' . $grid;
                // By default xs grid always 12
                if (isset($element['grid_xs']) && $element['grid_xs'] > 0 && $element['grid_xs'] <= 12) {
                    $div_class .= ' col-xs-' . $element['grid_xs'];
                }

                if (empty($element['div_class'])) {
                    $element['div_class'] = $div_class;
                } elseif (isset($element['grid']) && !preg_match('/col-(?:lg|md|sm|xs)-(\d+)/', $element['div_class'])) {
                    // Combine if passed both: grid size and div_class (and class not has col-* grid elements)
                    $element['div_class'] = $div_class . ' ' . $element['div_class'];
                }
                if ($element['right']) {
                    $element['div_class'] .= ' col-lg-push-0 col-md-push-0 col-sm-push-0';
                }
                if ($id === 'search') {
                    // Add form_id here, for generate onclick action in submit button
                    if ($data['url']) {
                        $element['form_id'] = $form_id;
                    }
                } else {
                    // all other cases add form_id
                    $element['form_id'] = $form_id;
                }
                $string_elements .= '    <div id="' . $element['id'] . '_div" class="' . $element['div_class'] . '"';
                if (!empty($element['div_style'])) {
                    $string_elements .= ' style="' . $element['div_style'] . '"';
                }
                $string_elements .= '>' . PHP_EOL;
                $string_elements .= generate_form_element($element);
                $string_elements .= '    </div>' . PHP_EOL;
            }
            $string_elements .= '  </div> <!-- END row-' . $k . ' -->' . PHP_EOL;
            // Add space between rows
            $row_style = 'style="margin-top: ' . $base_space . ';"';
        }
        // end rows type
    } elseif ($data['type'] === 'horizontal') {
        // Horizontal form, see example in html/pages/user_edit.inc.php
        if (str_contains_array($base_class, ['widget', 'box'])) {
            $base_space = ($data['space'] ? $data['space'] : '10px');

            $box_args = [
              'id'            => 'box-' . $form_id,
              'header-border' => TRUE,
              'body-style'    => 'padding-top: ' . $base_space . ' !important;'
            ];

            if (isset($data['title'])) {
                $box_args['title'] = $data['title'];
            }
            $div_begin = generate_box_open($box_args);
            $div_end   = generate_box_close();
            unset($box_args);
        } elseif (empty($base_class)) {
            // Clean class
            // Example in html/pages.logon.inc.php
            $div_begin = PHP_EOL;
            $div_end   = PHP_EOL;
        } else {
            // Old box box-solid style (or any custom style)
            $div_begin = '<div class="' . $base_class . '" style="padding: ' . $base_space . ';">' . PHP_EOL;
            if (isset($data['title'])) {
                $div_begin .= '  <div class="title">';
                $div_begin .= get_icon($data['icon']);
                $div_begin .= '&nbsp;' . escape_html($data['title']) . '</div>' . PHP_EOL;
            }
            $div_end = '</div>' . PHP_EOL;
        }
        $form_class = 'form form-horizontal';
        $row_style  = '';
        $fieldset   = [];

        foreach ($data['row'] as $k => $row) {
            $first_key         = key($row);
            $row_group         = $k;
            $row_elements      = '';
            $row_label         = '';
            $row_control_group = FALSE;
            $i                 = 0;
            foreach ($row as $id => $element) {
                $used_vars[]   = $id;
                $element['id'] = $id;
                if ($element['fieldset']) {
                    $row_group = $element['fieldset']; // Add this element to group
                }

                // Additional element options for horizontal specific form
                $div_style = '';
                switch ($element['type']) {
                    case 'hidden':
                        break;
                    case 'submit':
                        $div_class = 'form-actions';
                        break;
                    case 'text':
                    case 'input':
                    case 'password':
                    case 'textarea':
                    default:
                        $row_control_group = TRUE;
                        // In horizontal, first element name always placed at left
                        if (!isset($element['placeholder'])) {
                            $element['placeholder'] = TRUE;
                        }
                        // offset == FALSE disable label width and align class control-label
                        if (!isset($element['offset'])) {
                            if (isset($data['fieldset'][$element['fieldset']]['offset'])) {
                                // Copy from fieldset
                                $element['offset'] = $data['fieldset'][$element['fieldset']]['offset'];
                            } elseif (($element['type'] === 'raw' || $element['type'] === 'html') &&
                                      !isset($element['name']) && $first_key === $id) {
                                // When raw/html element first, disable offset
                                $element['offset'] = FALSE;
                            } else {
                                // Default
                                $element['offset'] = TRUE;
                            }
                        }
                        if ($i < 1) {
                            // Add label for first element in row
                            if ($element['name']) {
                                $row_label = '    <label';

                                $class_label = $element['offset'] ? 'control-label' : '';
                                if (str_contains($element['class'], 'text-nowrap')) {
                                    // Append nowrap to label element if requested
                                    $class_label .= ' text-nowrap';
                                }
                                if ($class_label) {
                                    $row_label .= ' class="' . $class_label . '"';
                                }

                                $row_label .= ' for="' . $element['id'] . '">' . $element['name'] . '</label>' . PHP_EOL;
                            }
                            $row_control_id = $element['id'] . '_div';
                            if ($element['type'] === 'datetime') {
                                $element['name'] = '';
                            }
                        }
                        // nextrow class element to new line (after label)
                        $div_class = ($element['offset']) ? 'controls' : 'nextrow';
                        break;
                }

                if (!isset($element['div_class'])) {
                    $element['div_class'] = $div_class;
                }
                if ($element['div_class'] === 'form-actions') {
                    // Remove margins only for form-actions elements
                    $div_style = 'margin: 0px;';
                }
                //if ($element['right'])
                //{
                //  $element['div_class'] .= ' pull-right';
                //}
                if (isset($element['div_style'])) {
                    $div_style .= ' ' . $element['div_style'];
                }
                if ($id === 'search') {
                    // Add form_id here, for generate onclick action in submit button
                    if ($data['url']) {
                        $element['form_id'] = $form_id;
                    }
                } else {
                    // all other cases add form_id
                    $element['form_id'] = $form_id;
                }

                $row_elements .= generate_form_element($element);
                $i++;
            }
            if ($element['div_class']) {
                // no additional divs if empty div class (hidden element for example)
                $row_begin = $row_label . PHP_EOL . '    <div id="' . $element['id'] . '_div" class="' . $element['div_class'] . '"';
                if (strlen($div_style)) {
                    $row_begin .= ' style="' . $div_style . '"';
                }
                $row_elements = $row_begin . '>' . PHP_EOL . $row_elements . '    </div>' . PHP_EOL;
            } else {
                $row_elements = $row_label . PHP_EOL . $row_elements;
            }

            if ($row_control_group) {
                $fieldset[$row_group] .= '  <div id="' . $row_control_id . '" class="control-group" style="margin-bottom: ' . $base_space . ';"> <!-- START row-' . $k . ' -->' . PHP_EOL;
                $fieldset[$row_group] .= $row_elements;
                $fieldset[$row_group] .= '  </div> <!-- END row-' . $k . ' -->' . PHP_EOL;
            } else {
                // Do not add control group for submit/hidden
                $fieldset[$row_group] .= $row_elements;
            }
            //$row_style = 'style="margin-top: '.$base_space.';"'; // Add space between rows
        }

        foreach ($data['fieldset'] as $row_group => $entry) {
            if (isset($fieldset[$row_group])) {
                if (!is_array($entry)) {
                    $entry = ['title' => $entry];
                }

                $fieldset_begin = '';
                $fieldset_end   = '';
                // Additional div class if set
                if (isset($entry['class'])) {
                    $fieldset_begin = '<div class="' . $entry['class'] . '">' . PHP_EOL . $fieldset_begin;
                    $fieldset_end   .= '</div>' . PHP_EOL;
                }

                $row_elements = $fieldset_begin . '
          <fieldset> <!-- START fieldset-' . $row_group . ' -->';
                if (!empty($entry['title'])) {
                    // fieldset title
                    $row_elements .= '
          <div class="control-group">
              <div class="controls">
                  <h3>' . escape_html($entry['title']) . '</h3>
              </div>
          </div>';
                }
                $row_elements         .= PHP_EOL . $fieldset[$row_group] . '
          </fieldset>  <!-- END fieldset-' . $row_group . ' -->
' . PHP_EOL;
                $fieldset[$row_group] = $row_elements . $fieldset_end;
            }
        }
        // Final combining elements
        $string_elements = implode('', $fieldset);
    } else {
        // Simple form, without any divs, see example in html/pages/user_edit.inc.php
        $div_begin       = '';
        $div_end         = '';
        $string_elements = '';
        foreach ($data['row'] as $k => $row) {
            foreach ($row as $id => $element) {
                $used_vars[]   = $id;
                $element['id'] = $id;

                if ($id === 'search') {
                    // Add form_id here, for generate onclick action in submit button
                    if ($data['url']) {
                        $element['form_id'] = $form_id;
                    }
                } else {
                    // all other cases add form_id
                    $element['form_id'] = $form_id;
                }
                $string_elements .= generate_form_element($element);
            }
            $string_elements .= PHP_EOL;
        }
    }

    // Add CSRF Token
    if (!in_array('requesttoken', $used_vars) && isset($_SESSION['requesttoken'])) {
        $string_elements .= generate_form_element(['type'  => 'hidden',
                                                   'id'    => 'requesttoken',
                                                   'value' => $_SESSION['requesttoken']]) . PHP_EOL;
        $used_vars[]     = 'requesttoken';
    }

    // Always clean pagination from form action url
    $used_vars[] = 'pageno';
    $used_vars[] = 'pagination';
    $used_vars[] = 'pagesize';

    // Remove old vars from url
    if ($data['url']) {
        foreach ($used_vars as $var) {
            $data['url'] = preg_replace('/' . $var . '=[^\/]+\/?/', '', $data['url']);
        }
    }

    // Form header
    if (isset($data['right']) && $data['right']) {
        $form_class .= ' pull-right';
    }

    // auto add some common html attribs
    $form_attribs = ['class' => $form_class];
    foreach (['onchange', 'oninput', 'onclick', 'ondblclick', 'onfocus', 'onsubmit'] as $attrib) {
        if (isset($data[$attrib])) {
            $form_attribs[$attrib] = $data[$attrib];
        }
    }

    $string = PHP_EOL . "<!-- START $form_id -->" . PHP_EOL;
    $string .= $div_begin;
    $string .= '<form method="POST" id="' . $form_id . '" name="' . $form_id . '" action="' . $data['url'] . '" ' .
               generate_html_attribs($form_attribs) . $form_style . '>' . PHP_EOL;
    if ($data['brand']) {
        $string .= '  <a class="brand">' . $data['brand'] . '</a>' . PHP_EOL;
    }
    if ($data['help']) {
        $string .= '  <span class="help-block">' . $data['help'] . '</span>' . PHP_EOL;
    }

    // Form elements
    $string .= $string_elements;

    // Form footer
    $string .= '</form>' . PHP_EOL;
    $string .= $div_end;
    $string .= "<!-- END $form_id -->" . PHP_EOL;

    if ($return) {
        // Save generation time for profiling
        $GLOBALS['form_time'] += utime() - $form_start;

        // Return form as string
        return $string;
    }

    // Print form
    echo($string);

    // Save generation time for profiling (after echo)
    $GLOBALS['form_time'] += utime() - $form_start;
}

// Box specific form (mostly same as in print_form, but support only box style and fieldset options)
// FIXME should likely not be in this file? As it's used throughout the software now...
function print_form_box($data, $return = FALSE)
{
    // Just return if safety requirements are not fulfilled
    if (isset($data['userlevel']) && $data['userlevel'] > $_SESSION['userlevel']) {
        return;
    }

    // Return if the user doesn't have write permissions to the relevant entity
    if (isset($data['entity_write_permit']) &&
        !is_entity_write_permitted($data['entity_write_permit']['entity_id'], $data['entity_write_permit']['entity_type'])) {
        return;
    }

    // Time our form filling.
    $form_start = microtime(TRUE);

    $form_id    = (isset($data['id']) ? $data['id'] : 'form-' . random_string());
    $form_class = 'form form-horizontal';
    if (isset($data['style'])) {
        $form_style = ' style="' . $data['style'] . '"';
    } else {
        $form_style = ' style="margin-bottom:0px;"';
    }
    $base_class = (array_key_exists('class', $data) ? $data['class'] : OBS_CLASS_BOX);
    $base_space = ($data['space'] ? $data['space'] : '15px');
    $used_vars  = [];

    // Cache permissions to session var
    permissions_cache_session();
    //r($_SESSION['cache']);

    if ($data['submit_by_key']) {
        $action = '';
        if ($data['url']) {
            $action .= 'this.form.prop(\'action\', form_to_path(\'' . $form_id . '\'));';
        }
        register_html_resource('script', '$(function(){$(\'form#' . $form_id . '\').each(function(){$(this).find(\'input\').keypress(function(e){if(e.which==10||e.which==13){' . $action . 'this.form.submit();}});});});');
    }

    $header = '';
    if (isset($data['title'])) {
        $header .= '  <h2>' . escape_html($data['title']) . '</h2>' . PHP_EOL;
    }

    // Form elements
    $div_begin = '<div class="row">' . PHP_EOL;
    $div_end   = '</div>' . PHP_EOL;
    if ($data['type'] === 'horizontal') {
        $row_style = '';
        $fieldset  = [];

        foreach ($data['row'] as $k => $row) {
            $first_key         = key($row);
            $row_group         = $k;
            $row_elements      = '';
            $row_label         = '';
            $row_control_group = FALSE;
            $i                 = 0;
            foreach ($row as $id => $element) {
                $used_vars[]   = $id;
                $element['id'] = $id;
                if ($element['fieldset']) {
                    $row_group = $element['fieldset']; // Add this element to group
                }

                // Additional element options for horizontal specific form
                $div_style = '';
                switch ($element['type']) {
                    case 'hidden':
                        break;
                    case 'submit':
                        $div_class = 'form-actions';
                        break;
                    case 'text':
                    case 'input':
                    case 'password':
                    case 'textarea':
                    default:
                        $row_control_group = TRUE;
                        // In horizontal, first element name always placed at left
                        if (!isset($element['placeholder'])) {
                            $element['placeholder'] = TRUE;
                        }
                        // offset == FALSE disable label width and align class control-label
                        if (!isset($element['offset'])) {
                            if (isset($data['fieldset'][$element['fieldset']]['offset'])) {
                                // Copy from fieldset
                                $element['offset'] = $data['fieldset'][$element['fieldset']]['offset'];
                            } elseif (($element['type'] === 'raw' || $element['type'] === 'html') && $first_key === $id) {
                                // When raw/html element first, disable offset
                                $element['offset'] = FALSE;
                            } else {
                                // Default
                                $element['offset'] = TRUE;
                            }
                        }
                        if ($i < 1) {
                            // Add label for first element in row
                            if ($element['name']) {
                                $row_label = '    <label';
                                if ($element['offset']) {
                                    $row_label .= ' class="control-label"';
                                }
                                $row_label .= ' for="' . $element['id'] . '">' . $element['name'] . '</label>' . PHP_EOL;
                            }
                            $row_control_id = $element['id'] . '_div';
                            if ($element['type'] === 'datetime') {
                                $element['name'] = '';
                            }
                        }
                        // nextrow class element to new line (after label)
                        $div_class = ($element['offset']) ? 'controls' : 'nextrow';
                        break;
                }

                if (!isset($element['div_class'])) {
                    $element['div_class'] = $div_class;
                }
                if ($element['div_class'] === 'form-actions') {
                    // Remove margins only for form-actions elements
                    $div_style = 'margin: 0px;';
                }
                //if ($element['right'])
                //{
                //  $element['div_class'] .= ' pull-right';
                //}
                if (isset($element['div_style'])) {
                    $div_style .= ' ' . $element['div_style'];
                }
                if ($id === 'search') {
                    // Add form_id here, for generate onclick action in submit button
                    if ($data['url']) {
                        $element['form_id'] = $form_id;
                    }
                } else {
                    // all other cases add form_id
                    $element['form_id'] = $form_id;
                }

                $row_elements .= generate_form_element($element);
                $i++;
            }

            if ($element['div_class']) {
                // no additional divs if empty div class (hidden element for example)
                $row_begin = $row_label . PHP_EOL . '    <div class="' . $element['div_class'] . '"';
                if (strlen($div_style)) {
                    $row_begin .= ' style="' . $div_style . '"';
                }
                $row_elements = $row_begin . '>' . PHP_EOL . $row_elements . '    </div>' . PHP_EOL;
            } else {
                $row_label    = str_replace(' class="control-label"', '', $row_label);
                $row_elements = $row_label . PHP_EOL . $row_elements;
            }

            if ($row_control_group) {
                $fieldset[$row_group] .= '  <div id="' . $row_control_id . '" class="control-group"> <!-- START row-' . $k . ' -->' . PHP_EOL;
                $fieldset[$row_group] .= $row_elements;
                $fieldset[$row_group] .= '  </div> <!-- END row-' . $k . ' -->' . PHP_EOL;
            } else {
                // Do not add control group for submit/hidden
                $fieldset[$row_group] .= $row_elements;
            }
            //$row_style = 'style="margin-top: '.$base_space.';"'; // Add space between rows
        }

        $divs             = [];
        $fieldset_tooltip = '';
        foreach ($data['fieldset'] as $group => $entry) {
            if (isset($fieldset[$group])) {
                if (!is_array($entry)) {
                    $entry = ['title' => $entry];
                }
                // Custom style
                if (!isset($entry['style'])) {
                    $entry['style'] = 'padding-bottom: 0px !important;'; // Remove last additional padding space
                }
                // Combine fieldsets into common rows
                if ($entry['div']) {
                    $divs[$entry['div']][] = $group;
                } else {
                    $divs['row'][] = $group;
                }

                $box_args = ['header-border' => TRUE,
                             'padding'       => TRUE,
                             'id'            => $group,
                ];
                if (isset($entry['style'])) {
                    $box_args['body-style'] = $entry['style'];
                }
                if (isset($entry['title'])) {
                    $box_args['title'] = $entry['title'];
                    if ($entry['icon']) {
                        // $box_args['icon'] => $entry['icon'];
                    }
                }

                if (isset($entry['tooltip'])) {
                    $box_args['header-controls'] = ['controls' => ['tooltip' => ['icon'   => 'icon-info text-primary',
                                                                                 'anchor' => TRUE,
                                                                                 //'url'    => '#',
                                                                                 'class'  => 'tooltip-from-element',
                                                                                 'data'   => 'data-tooltip-id="tooltip-' . $group . '"']]];

                    $fieldset_tooltip .= '<div id="tooltip-' . $group . '" style="display: none;">' . PHP_EOL;
                    $fieldset_tooltip .= $entry['tooltip'] . '</div>' . PHP_EOL;
                }

                if (isset($entry['tooltip'])) {
                    $box_args['style'] = $entry['style'];
                }

                $fieldset_begin = generate_box_open($box_args);

                $fieldset_end = generate_box_close();

                // Additional div class if set
                if (isset($entry['class'])) {
                    $fieldset_begin = '<div class="' . $entry['class'] . '">' . PHP_EOL . $fieldset_begin;
                    $fieldset_end   .= '</div>' . PHP_EOL;
                }

                $row_elements     = $fieldset_begin . '
          <fieldset> <!-- START fieldset-' . $group . ' -->';
                $row_elements     .= PHP_EOL . $fieldset[$group] . '
          </fieldset> <!-- END fieldset-' . $group . ' -->' . PHP_EOL;
                $fieldset[$group] = $row_elements . $fieldset_end;
            }
        }
        // Combine fieldsets into common rows
        foreach ($divs as $entry) {
            $row_elements = $div_begin;
            foreach ($entry as $i => $group) {
                $row_elements .= $fieldset[$group];
                if ($i > 0) {
                    // unset all fieldsets except first one for replace later
                    unset($fieldset[$group]);
                }
            }
            $row_elements .= $div_end;
            // now replace first fieldset in group
            $fieldset[array_shift($entry)] = $row_elements;
        }
        // Final combining elements
        $string_elements = implode('', $fieldset);
    }

    // Add CSRF Token
    if (!in_array('requesttoken', $used_vars) && isset($_SESSION['requesttoken'])) {
        $string_elements .= generate_form_element(['type'  => 'hidden',
                                                   'id'    => 'requesttoken',
                                                   'value' => $_SESSION['requesttoken']]) . PHP_EOL;
        $used_vars[]     = 'requesttoken';
    }

    // Remove old vars from url
    if ($data['url']) {
        foreach ($used_vars as $var) {
            $data['url'] = preg_replace('/' . $var . '=[^\/]+\/?/', '', $data['url']);
        }
    }

    // Form header
    $string = PHP_EOL . "<!-- START $form_id -->" . PHP_EOL;
    $string .= $header;
    $string .= '<form method="POST" id="' . $form_id . '" name="' . $form_id . '" action="' . $data['url'] . '" class="' . $form_class . '"' . $form_style . '>' . PHP_EOL;

    // Form elements
    $string .= $string_elements;

    // Form footer
    $string .= '</form>' . PHP_EOL;
    $string .= $fieldset_tooltip;
    $string .= "<!-- END $form_id -->" . PHP_EOL;

    if ($return) {
        // Save generation time for profiling
        $GLOBALS['form_time'] += utime() - $form_start;

        // Return form as string
        return $string;
    }

    // Print form
    echo($string);

    // Save generation time for profiling (after echo)
    $GLOBALS['form_time'] += utime() - $form_start;

}

/**
 * Generates form elements. The main use for print_search() and print_form(), see examples of this functions.
 *
 * Common options (can be in any(mostly) element type):
 *   (string) id      - element identificator
 *   (array)  attribs - any custom element attrib (where key is attrib name, value - attrib value)
 *   (bool)   offset  - for horizontal forms enable (default) or disable element offset (shift to the right on 180px)
 * Options tree:
 * textarea -\
 *     (string)id, (string)name, (bool)readonly, (bool)disabled, (string)width, (string)class,
 *     (int)rows, (int)cols,
 *     (string)value, (bool,string)placeholder, (bool)ajax, (array)ajax_vars
 * text, input, password -\
 *     (string)id, (string)name, (bool)readonly, (bool)disabled, (string)width, (string)class,
 *     (string)value, (bool,string)placeholder, (bool)ajax, (array)ajax_vars,
 *     (bool)show_password
 * hidden -\
 *     (string)id, (string)value
 * select, multiselect -\
 *     (string)id, (string)name, (bool)readonly, (bool)disabled, (string)onchange, (string)width,
 *     (string)title, (int)size, (bool)right, (bool)live-search, (bool)encode, (bool)subtext
 *     (string)value, (array)values, (string)icon,
 *     values items can be arrays, ie:
 *         value => array('name' => string, 'group' => string, 'icon' => string, 'class' => string, 'style' => string)
 * datetime -\
 *     (string)id, (string)name, (bool)readonly, (bool)disabled,
 *     (string|FALSE)from, (string|FALSE)to, (bool)presets, (string)min, (string)max
 *     (string)value (use it for single input)
 * checkbox, switch, toggle -\
 *     (string)id, (string)name, (bool)readonly, (bool)disabled, (string)onchange,
 *     [switch only]: (bool)revert, (int)width, (string)size, (string)off-color, (string)on-color, (string)off-text, (string)on-text
 *     [toggle only]: (string)view, (string)size, (string)palette, (string)group, (string)label,
 *                    (string)icon-check, (string)label-check, (string)icon-uncheck, (string)label-uncheck
 *     (string)value, (string)placeholder, (string)title
 * submit -\
 *     (string)id, (string)name, (bool)readonly, (bool)disabled,
 *     (string)class, (bool)right, (string)tooltip,
 *     (string)value, (string)form_id, (string)icon
 * html, raw -\
 *     (string)id, (bool)offset,
 *     (string)html, (string)value
 * newline -\
 *     (string)id,
 *     (bool)hr
 *
 * @param array  $item Options for current form element
 * @param string $type Type of form element, also can passed as $item['type']
 *
 * @return string Generated form element
 */
function generate_form_element($item, $type = '')
{
    // Check community edition
    if (isset($item['community']) && !$item['community'] && OBSERVIUM_EDITION === 'community') {
        return '';
    }

    // Check and initialize 'readonly' and 'disabled'
    $item['readonly'] = isset($item['readonly']) ? $item['readonly'] : FALSE;
    $item['disabled'] = isset($item['disabled']) ? $item['disabled'] : FALSE;

    $value_isset = isset($item['value']);
    if (!$value_isset) {
        $item['value'] = '';
    }
    if (is_array($item['value'])) {
        // Passed from URI comma values always converted to array, re-implode it
        $item['value_escaped'] = escape_html(implode(',', $item['value']));
    } else {
        $item['value_escaped'] = escape_html($item['value']);
    }

    if (!isset($item['type'])) {
        $item['type'] = $type;
    }
    $string          = '';
    $element_tooltip = '';
    $element_data    = '';

    // auto add some common html attribs
    foreach (['onchange', 'oninput', 'onclick', 'ondblclick', 'onfocus', 'onsubmit'] as $attrib) {
        if (isset($item[$attrib])) {
            $item['attribs'][$attrib] = $item[$attrib];
        }
    }

    if (isset($item['attribs']) && is_array($item['attribs'])) {
        // Custom html attributes

        if (isset($item['attribs']['data-toggle'])) {
            // Enable item specific JS/CSS/Script
            switch ($item['attribs']['data-toggle']) {
                case 'confirm':
                case 'confirmation':
                    if ($item['attribs']['data-toggle'] === 'confirmation') {
                        $item['attribs']['data-toggle'] = 'confirm';
                    }
                    // popConfirm
                    //register_html_resource('js',     'jquery.popconfirm.js');
                    //register_html_resource('script', '$("[data-toggle=\'' . $item['attribs']['data-toggle'] . '\']").popConfirm();');
                    // Bootstrap-Confirmation
                    register_html_resource('js', 'bootstrap-confirmation.js');

                    //register_html_resource('script', '$("[data-toggle=\'' . $item['attribs']['data-toggle'] .
                    //                                 '\']").confirmation({rootSelector: \'[data-toggle=' . $item['attribs']['data-toggle'] . ']\',});');
                    //$script_options = [ 'rootSelector: \'[data-toggle=' . $item['attribs']['data-toggle'] . ']\'' ];

                    if (!isset($item['attribs']['data-btn-ok-label'])) {
                        // default "Yes"
                        //$item['attribs']['data-btn-ok-label'] = 'Yes';
                    }
                    if (!isset($item['attribs']['data-btn-ok-class'])) {
                        // default "btn btn-xs btn-primary"
                    }
                    if (!isset($item['attribs']['data-btn-ok-icon'])) {
                        // default "glyphicon glyphicon-ok"
                        //$item['attribs']['data-btn-ok-icon'] = 'Yes';
                    }
                    if (!isset($item['attribs']['data-btn-cancel-label'])) {
                        // default "No"
                        //$item['attribs']['data-btn-cancel-label'] = 'Cheese';
                    }
                    if (!isset($item['attribs']['data-btn-cancel-class'])) {
                        // default "btn btn-xs btn-default"
                        //$item['attribs']['data-btn-cancel-class'] = 'btn-small btn-warning';
                    }
                    if (!isset($item['attribs']['data-btn-cancel-icon'])) {
                        // default "glyphicon glyphicon-remove"
                        //$item['attribs']['data-btn-cancel-icon'] = 'icon-sort';
                    }

                    // migrate from popConfirm
                    if (!isset($item['attribs']['data-title'])) {
                        $item['attribs']['data-title'] = 'Confirmation';
                    }
                    if (!isset($item['attribs']['data-singleton'])) {
                        $item['attribs']['data-singleton'] = 'true';
                    }
                    if (!isset($item['attribs']['data-popout'])) {
                        $item['attribs']['data-popout'] = 'true';
                    }
                    if (isset($item['attribs']['data-confirm-placement'])) {
                        $item['attribs']['data-placement'] = $item['attribs']['data-confirm-placement'];
                        unset($item['attribs']['data-confirm-placement']);
                    }
                    if (isset($item['attribs']['data-confirm-content'])) {
                        $item['attribs']['data-content'] = $item['attribs']['data-confirm-content'];
                        unset($item['attribs']['data-confirm-content']);
                    }
                    //register_html_resource('script', '$("[data-toggle=\'' . $item['attribs']['data-toggle'] . '\']").confirmation({' . implode(', ', $script_options) . '});');
                    break;
                case 'switch':
                    // Bootstrap Toggle
                    //$element_data .= ' data-selector="bootstrap-toggle"';
                    $item['attribs']['data-selector'] = "bootstrap-toggle";
                    register_html_resource('js', 'bootstrap-toggle.min.js');
                    //register_html_resource('js',     'bootstrap-toggle.js'); /// DEVEL
                    register_html_resource('css', 'bootstrap-toggle.min.css');
                    register_html_resource('script', '$("input[data-selector=\'bootstrap-toggle\']").bootstrapToggle();');
                    /* bootstrapSwitch (deprecated)
                      register_html_resource('js',     'bootstrap-switch.min.js');
                    //register_html_resource('css',    'bootstrap-switch.css');
                      register_html_resource('script', '$("[data-toggle=\'' . $item['attribs']['data-toggle'] . '\']").bootstrapSwitch();');
                    */
                    break;
                case 'toggle':
                    if (str_contains($item['class'], 'tiny-toggle')) {
                        // TinyToggle
                        $script = '';
                        if ($item['onchange']) {
                            // Here toggle specific onchange behavior
                            $script .= 'onChange: function(obj, value) { ' . $item['onchange'] . ' },';
                            // Set custom element selector
                            $selector = 'tiny-toggle-' . md5($item['onchange']);
                            //$element_data .= ' data-selector="'.$selector.'"';
                            $item['attribs']['data-selector'] = $selector;
                            register_html_resource('script', '$("input[data-selector=\'' . $selector . '\'].tiny-toggle").tinyToggle({' . $script . '});');
                            unset($item['onchange']);
                        } else {
                            //$element_data .= ' data-selector="tiny-toggle"';
                            $item['attribs']['data-selector'] = "tiny-toggle";
                            //register_html_resource('script', '$("[data-toggle=\'' . $item['attribs']['data-toggle'] . '\']").tinyToggle({'.$script.'});'); // this selector intersects with bootstrap toggle
                            register_html_resource('script', '$("input[data-selector=\'tiny-toggle\'].tiny-toggle").tinyToggle();');
                        }
                        register_html_resource('js', 'tiny-toggle.min.js');
                        register_html_resource('css', 'tiny-toggle.min.css');
                    } else {
                        // Bootstrap Toggle
                        //$element_data .= ' data-selector="bootstrap-toggle"';
                        $item['attribs']['data-selector'] = "bootstrap-toggle";
                        register_html_resource('js', 'bootstrap-toggle.min.js');
                        //register_html_resource('js',     'bootstrap-toggle.js'); /// DEVEL
                        register_html_resource('css', 'bootstrap-toggle.min.css');
                        register_html_resource('script', '$("input[data-selector=\'bootstrap-toggle\']").bootstrapToggle();');
                    }
                    //r($item);
                    break;
            }
        }
        $element_data .= ' ' . generate_html_attribs($item['attribs']);
    }
    switch ($item['type']) {
        case 'hidden':
            if (!$item['readonly'] && !$item['disabled']) // If item readonly or disabled, just skip item
            {
                $string .= '    <input type="' . $item['type'] . '" name="' . $item['id'] . '" id="' . $item['id'] . '" value="' . $item['value_escaped'] . '"' . $element_data . ' />' . PHP_EOL;
            }
            break;

        case 'password':
        case 'textarea':
        case 'text':
        case 'input':
            $item_class   = '';
            $value_hidden = FALSE;
            if ($item['type'] !== 'textarea') {
                $item_begin = '    <input type="' . $item['type'] . '" ';
                // Autocomplete
                $autocomplete_off = isset($item['autocomplete']) && !$item['autocomplete']; // Disable autocomplete if it set in item params as FALSE!
                // password specific options
                if ($item['type'] === 'password') {
                    // disable autocomplete for passwords by default!
                    $autocomplete_off = !(isset($item['autocomplete']) && $item['autocomplete']);

                    // mask password field for disabled/readonly by bullet
                    $value_len = strlen($item['value']);
                    if (($item['disabled'] || $item['readonly']) && $value_len &&
                        !($item['show_password'] && $_SESSION['userlevel'] > 7)) {
                        $item['value_escaped'] = '&#8226;&#8226;&#8226;&#8226;&#8226;&#8226;&#8226;&#8226;';
                        $value_hidden          = TRUE;
                    }
                    // add icon for show/hide password
                    if ($item['show_password']) {
                        $item_begin .= ' data-toggle="password" ';
                        register_html_resource('js', 'bootstrap-show-password.min.js');
                        $GLOBALS['cache_html']['javascript'][] = "$('[data-toggle=\"password\"]').password();";
                    }
                    //elseif (!$value_hidden && $autocomplete_off) {}
                }

                // Disable Autocomplete if required
                if ($autocomplete_off) {

                    $browser = detect_browser();
                    //r($browser);

                    // Autofill off is not simple!
                    //https://developer.mozilla.org/en-US/docs/Web/Security/Securing_your_site/Turning_off_form_autocompletion#The_autocomplete_attribute_and_login_fields
                    //https://www.chromium.org/developers/design-documents/form-styles-that-chromium-understands
                    //https://stackoverflow.com/questions/41945535/html-disable-password-manager
                    if ($item['type'] === 'password' && !$value_hidden) {
                        $autocomplete_value = 'new-password';
                        $item_begin         = '<input type="password" id="disable-pwd-mgr-1" autocomplete="off" style="display:none;" tabindex="-1" value="disable-pwd-mgr-1" />' .
                                              '<input type="password" id="disable-pwd-mgr-2" autocomplete="off" style="display:none;" tabindex="-1" value="disable-pwd-mgr-2" />' .
                                              '<input type="password" id="disable-pwd-mgr-3" autocomplete="off" style="display:none;" tabindex="-1" value="disable-pwd-mgr-3" />' .
                                              $item_begin;
                    } else {
                        $autocomplete_value = 'off';
                    }
                    $item_begin .= ' autocomplete="' . $autocomplete_value . '" ';

                    if ($browser['browser'] === 'Safari') {
                        // Safari issue: https://stackoverflow.com/questions/22661977/disabling-safari-autofill-on-usernames-and-passwords
                        //$item_begin .= ' autocomplete="off" readonly onfocus="if (this.hasAttribute(\'readonly\')) {this.removeAttribute(\'readonly\'); this.blur(); this.focus();}" ';
                        //$item_begin .= ' autocomplete="false" ';
                        // This disable safari autocomplete button
                        register_html_resource('style', <<<STYLE
input::-webkit-contacts-auto-fill-button, 
input::-webkit-credentials-auto-fill-button {
  visibility: hidden;
  pointer-events: none;
  position: absolute;
  right: 0;
}
STYLE
                        );
                    }
                    /*
                    elseif ($browser['browser'] == 'Chrome') {
                      // Chrome issue: http://stackoverflow.com/questions/15738259/disabling-chrome-autofill
                      //$item_begin .= ' autocomplete="new-password" ';
                      $item_begin .= ' autocomplete="off" ';

                    } else {
                      $item_begin .= ' autocomplete="new-password" '; // This not worked in latest Chrome versions
                    }
                    // http://stackoverflow.com/questions/15738259/disabling-chrome-autofill
                    //$item_begin .= ' autocomplete="off" '; // This not worked in latest Chrome versions
                    */
                }
                $item_end   = ' value="' . $item['value_escaped'] . '" />';
                $item_class .= 'input';
            } else {
                $item_begin = '    <textarea ';
                // textarea specific options
                if (is_numeric($item['rows'])) {
                    $item_begin .= 'rows="' . $item['rows'] . '" ';
                }
                if (is_numeric($item['cols'])) {
                    $item_begin .= 'cols="' . $item['cols'] . '" ';
                }
                $item_end   = '>' . $item['value_escaped'] . '</textarea>';
                $item_class .= 'form-control';
            }
            $item_begin .= $element_data; // Add custom data- attribs
            if ($item['disabled']) {
                $item_end = ' disabled="1"' . $item_end;
            } elseif ($item['readonly']) {
                $item_end = ' readonly="1"' . $item_end;
            }

            if (isset($item['placeholder']) && $item['placeholder'] !== FALSE) {
                if ($item['placeholder'] === TRUE) {
                    $item['placeholder'] = $item['name'];
                }
                $string              .= PHP_EOL;
                $string              .= $item_begin . 'placeholder="' . $item['placeholder'] . '" ';
                $item['placeholder'] = TRUE; // Set to true for check at end
            } elseif ($item['type'] === 'text') {
                $string .= $item_begin;
            } else {
                $string .= '  <div class="input-prepend">' . PHP_EOL;
                if (!$item['name']) {
                    $item['name'] = get_icon('icon-list');
                }
                $string .= '    <span class="add-on">' . $item['name'] . '</span>' . PHP_EOL;
                $string .= $item_begin;
            }
            if ($item['size']) {
                $string .= ' size="' . $item['size'] . '"';
            }
            if ($item['class']) {
                $item_class .= ' ' . $item['class'];
            }

            // style
            $style = isset($item['width']) ? 'width:' . $item['width'] . ';' : '';
            if (isset($item['style'])) {
                $style .= ' ' . $item['style'];
                $style = trim($style);
            }
            $string .= $style ? 'style="' . $style . '" ' : '';

            $string .= 'name="' . $item['id'] . '" id="' . $item['id'] . '" class="' . $item_class;

            if ($item['ajax'] === TRUE && is_array($item['ajax_vars'])) {
                $ajax_vars = [];
                if (!isset($item['ajax_vars']['field'])) {
                    // If query field not specified use item id as field
                    $item['ajax_vars']['field'] = $item['id'];
                }
                foreach ($item['ajax_vars'] as $k => $v) {
                    $ajax_vars[] = urlencode($k) . '=' . var_encode($v);
                }
                $string .= ' ajax-typeahead" autocomplete="off" data-link="/ajax/input.php?' . implode('&amp;', $ajax_vars);

                // Register scripts/css
                register_html_resource('js', 'typeahead.bundle.min.js');
                register_html_resource('css', 'typeaheadjs.css');

                // Ajax autocomplete for input
                // <input type='text' class='ajax-typeahead' data-link='your-json-link' />
                $item_id = $item['id'];
                $script  = <<<SCRIPT
  var element_$item_id = $('#$item_id.ajax-typeahead');
  var entries_$item_id = new Bloodhound({
    datumTokenizer: Bloodhound.tokenizers.obj.whitespace('value'),
    queryTokenizer: Bloodhound.tokenizers.whitespace,
    remote: {
      url: element_$item_id.data('link') + '&query=%QUERY',
      wildcard: '%QUERY',
      filter: function(json) {
        return json.options;
      },
      transform: function (data) {
          var newData = [];
          data.forEach(function (item) {
            newData.push({'value': item});
          });
          return newData;
      }
    }
  });
  element_$item_id.typeahead({
      hint: false,
      highlight: true,
      minLength: 1
    },
    {
      name: 'options',
      limit: 16,
      source: entries_$item_id
    }
  );
SCRIPT;
                register_html_resource('script', $script);
            } // end ajax

            $string .= '" ' . $item_end . PHP_EOL;
            $string .= ($item['placeholder'] ? PHP_EOL : '  </div>' . PHP_EOL);
            // End 'text' & 'input'
            break;

        case 'switch':
            /* switch specific options (deprecated, replaced with bootstrap-toggle)
            if (isset($item['revert']) && $item['revert']) {
              // Fallback for old preconfigured style
              if (!isset($item['size']))      { $item['size']      = 'mini'; }
              if (!isset($item['on-color']))  { $item['on-color']  = 'danger'; }
              if (!isset($item['off-color'])) { $item['off-color'] = 'primary'; }
              if (!isset($item['on-text']))   { $item['on-text']   = 'No'; }
              if (!isset($item['off-text']))  { $item['off-text']  = 'Yes'; }
              unset($item['revert']);
            }
            // Convert to data attribs and recursive call to checkbox
            $item['attribs']['data-toggle'] = 'switch';
            $item_attribs = array('size', 'on-color', 'on-text', 'off-color', 'off-text');
            foreach($item_attribs as $attr) {
              if (isset($item[$attr])) { $item['attribs']['data-'.$attr] = $item[$attr]; }
            }
            if (is_numeric($item['width']) && $item['width'] > 10) {
              $item['attribs']['data-handle-width'] = (int)($item['width'] / 2);
            }
            $item['type'] = 'checkbox'; // replace item type
            return generate_form_element($item);
            end switch */

        case 'switch-ng':
        case 'switch-new':
            //r($item);
            // switch-ng specific options
            // Convert to data attribs and recursive call to checkbox
            $item['attribs']['data-toggle'] = 'toggle';
            // Convert to data attribs and recursive call to checkbox
            $item_attribs = ['size', 'width', 'height'];
            foreach ($item_attribs as $attr) {
                if (isset($item[$attr])) {
                    $item['attribs']['data-' . $attr] = $item[$attr];
                }
            }
            // Append icons
            if (isset($item['icon'])) {
                $item['on-icon']  = isset($item['on-icon']) ? $item['on-icon'] : $item['icon'];
                $item['off-icon'] = isset($item['off-icon']) ? $item['off-icon'] : $item['icon'];
            }
            if (isset($item['on-icon'])) {
                if (isset($item['on-text'])) {
                    $item['on-text'] = get_icon($item['on-icon']) . '&nbsp;' . $item['on-text'];
                } else {
                    $item['on-text'] = get_icon($item['on-icon']);
                }
            }
            if (isset($item['off-icon'])) {
                if (isset($item['off-text'])) {
                    $item['off-text'] = get_icon($item['off-icon']) . '&nbsp;' . $item['off-text'];
                } else {
                    $item['off-text'] = get_icon($item['off-icon']);
                }
            }
            // This is compat with old 'switch' item attribs
            $item_attribs = ['on-color' => 'onstyle', 'on-text' => 'on', 'off-color' => 'offstyle', 'off-text' => 'off', 'class' => 'style'];
            foreach ($item_attribs as $attr => $data_attr) {
                if (isset($item[$attr])) {
                    $item['attribs']['data-' . $data_attr] = $item[$attr];
                }
            }

            // Onchange target id
//      if ($item['onchange-id'])
//      {
//        $item['attribs']['data-onchange-id'] = $item['onchange-id'];
//      }

            //$item['class'] .= ' tiny-toggle'; // additional class for toggle
            $item['type'] = 'checkbox';       // replace item type
            //r(generate_form_element($item));
            return generate_form_element($item);
        // end switch-ng

        case 'toggle':
            // toggle specific options
            // Convert to data attribs and recursive call to checkbox
            $item['attribs']['data-toggle'] = 'toggle';
            // Convert switch style attr to toggle
            $item_attribs = ['on-icon' => 'icon-check', 'on-text' => 'label-check', 'off-icon' => 'icon-uncheck', 'off-text' => 'label-uncheck'];
            foreach ($item_attribs as $attr => $data_attr) {
                if (isset($item[$attr]) && !isset($item[$data_attr])) {
                    $item[$data_attr] = $item[$attr];
                }
            }
            // Move placeholder to label
            if (isset($item['placeholder']) && is_string($item['placeholder'])) {
                $item['attribs']['data-tt-label'] = get_markdown($item['placeholder'], TRUE, TRUE);
                unset($item['placeholder']);
            }
            $item_attribs = ['size', 'palette', 'group', 'label', 'icon-check', 'label-check', 'icon-uncheck', 'label-uncheck'];
            foreach ($item_attribs as $attr) {
                if (isset($item[$attr])) {
                    $item['attribs']['data-tt-' . $attr] = $item[$attr];
                }
            }
            // Types: http://tinytoggle.simonerighi.net/#types
            if (in_array($item['view'], ['toggle', 'check', 'circle', 'square', 'square_v', 'power',
                                         'dot', 'like', 'watch', 'star', 'lock', 'heart', 'smile'])) {
                $item['attribs']['data-tt-type'] = $item['view'];
            } else {
                $item['attribs']['data-tt-type'] = 'square'; // default type
            }
            // Onchange target id
            if ($item['onchange-id']) {
                $item['attribs']['data-onchange-id'] = $item['onchange-id'];
            }
            // tiny-toggle not support readonly
            if (isset($item['readonly'])) {
                $item['disabled'] = $item['readonly'] || $item['disabled'];
                //unset($item['readonly']);
            }

            $item['class'] .= ' tiny-toggle'; // additional class for toggle
            $item['type']  = 'checkbox';      // replace item type
            return generate_form_element($item);
        // end toggle

        case 'checkbox':
            $string = '    <input type="checkbox" ';
            $string .= ' name="' . $item['id'] . '" id="' . $item['id'] . '" ' . $item_switch;
            if ($item['title']) {
                $string .= ' data-rel="tooltip" data-tooltip="' . escape_html($item['title']) . '" title="' . escape_html($item['title']) . '"';
            }
            $string .= ' value="1"';
            if (get_var_true($item['value'])) {
                $string .= ' checked';
            }
            if ($item['disabled']) {
                $string .= ' disabled="1"';
            } elseif ($item['readonly']) {
                $string .= ' readonly="1" onclick="return false"';
            }
            if ($item['class']) {
                $string .= ' class="' . trim($item['class']) . '"';
            }
            $string .= $element_data . ' />'; // Add custom data- attribs
            if (is_string($item['placeholder'])) {
                // add placeholder text at right of the element
                $string .= '      <label for="' . $item['id'] . '" class="help-inline" style="margin-top: 4px;">' .
                           get_markdown($item['placeholder'], TRUE, TRUE) . '</label>' . PHP_EOL;
//        $string = '      <label for="' . $item['id'] . '" class="help-inline" style="margin-top: 4px;">' . $string .
//                  $item['placeholder'] . '</label>' . PHP_EOL;
            }
            // End 'switch' & 'checkbox'
            break;

        case 'datetime':
            register_html_resource('js', 'bootstrap-datetimepicker.min.js'); // Enable DateTime JS
            // Additionally register qTip (if not already enabled by $config['web_mouseover'])
            register_html_resource('js', 'jquery.qtip.min.js');
            //register_html_resource('css', 'jquery.qtip.min.css'); // in obs css
            $id_from = $item['id'] . '_from';
            $id_to   = $item['id'] . '_to';
            if ($value_isset && !$item['from'] && !$item['to']) {
                // Single datetime input
                $item['from']    = $item['value_escaped'];
                $item['to']      = FALSE;
                $item['presets'] = FALSE;
                $id_from         = $item['id'];
                $name_from       = $item['name'];
            } else {
                $name_from = 'From';
            }
            // Presets
            if ($item['from'] === FALSE || $item['to'] === FALSE) {
                $item['presets'] = FALSE;
            }

            if (is_numeric($item['from'])) {
                $item['from'] = strftime("%F %T", $item['from']);
            }
            if (is_numeric($item['to'])) {
                $item['to'] = strftime("%F %T", $item['to']);
            }

            if ($item['presets']) {
                $presets = ['sixhours'  => 'Last 6 hours',
                            'today'     => 'Today',
                            'yesterday' => 'Yesterday',
                            'tweek'     => 'This week',
                            'lweek'     => 'Last week',
                            'tmonth'    => 'This month (' . date('F') . ')',
                            'lmonth'    => 'Last month (' . date('F', strtotime('previous month')) . ')',
                            'tquarter'  => 'This quarter',
                            'lquarter'  => 'Last quarter',
                            'tyear'     => 'This year',
                            'lyear'     => 'Last year'];
                // Recursive call
                $preset_item = ['id'     => $item['id'] . '_preset',
                                'type'   => 'select',
                                'name'   => 'Date presets',
                                'width'  => '110px',
                                'values' => $presets];
                $string      .= generate_form_element($preset_item) . PHP_EOL;
            }
            // Date/Time input fields
            if ($item['from'] !== FALSE) {
                $string .= '  <div id="' . $id_from . '_div" class="input-prepend">' . PHP_EOL;
                $string .= '    <span class="add-on btn"><i data-time-icon="icon-time" data-date-icon="icon-calendar"></i> ' . $name_from . '</span>' . PHP_EOL;
                //$string .= '    <input type="text" class="input-medium" data-format="yyyy-MM-dd hh:mm:ss" ';
                $string .= '    <input type="text" data-format="yyyy-MM-dd hh:mm:ss" ';
                $string .= (isset($item['width'])) ? 'style="width:' . escape_html($item['width']) . '" ' : 'style="width: 130px;" ';
                if ($item['disabled']) {
                    $string .= 'disabled="1" ';
                } elseif ($item['readonly']) {
                    $item['disabled'] = TRUE; // for js
                    $string           .= 'readonly="1" ';
                }
                $string .= 'name="' . $id_from . '" id="' . $id_from . '" value="' . escape_html($item['from']) . '"/>' . PHP_EOL;
                $string .= '  </div>' . PHP_EOL;
            }
            if ($item['to'] !== FALSE) {
                $string .= '  <div id="' . $id_to . '_div" class="input-prepend">' . PHP_EOL;
                $string .= '    <span class="add-on btn"><i data-time-icon="icon-time" data-date-icon="icon-calendar"></i> To</span>' . PHP_EOL;
                //$string .= '    <input type="text" class="input-medium" data-format="yyyy-MM-dd hh:mm:ss" ';
                $string .= '    <input type="text" data-format="yyyy-MM-dd hh:mm:ss"';
                $string .= (isset($item['width'])) ? ' style="width:' . escape_html($item['width']) . '"' : ' style="width: 140px;"';
                $string .= $element_data; // Add custom data- attribs
                $string .= ' name="' . $id_to . '" id="' . $id_to . '" value="' . escape_html($item['to']) . '"/>' . PHP_EOL;
                $string .= '  </div>' . PHP_EOL;
            }
            // JS SCRIPT
            $min     = '-Infinity';
            $max     = 'Infinity';
            $pattern = '/^(\d{4})-(\d{2})-(\d{2}) ([01]\d|2[0-3]):([0-5]\d):([0-5]\d)$/';
            if (!empty($item['min'])) {
                if (preg_match($pattern, $item['min'], $matches)) {
                    $matches[2] -= 1;
                    array_shift($matches);
                    $min = 'new Date(' . implode(',', $matches) . ')';
                } elseif ($item['min'] === 'now' || $item['min'] === 'current') {
                    $min = 'new Date()';
                }
            }
            if (!empty($item['max'])) {
                if (preg_match($pattern, $item['max'], $matches)) {
                    $matches[2] -= 1;
                    array_shift($matches);
                    $max = 'new Date(' . implode(',', $matches) . ')';
                } elseif ($item['max'] === 'now' || $item['max'] === 'current') {
                    $max = 'new Date()';
                }
            }

            $script = '
      var startDate = ' . $min . ';
      var endDate   = ' . $max . ';
      $(document).ready(function() {
        $(\'[id=' . $id_from . '_div]\').datetimepicker({
          //pickSeconds: false,
          weekStart: 1,
          startDate: startDate,
          endDate: endDate
        });';
            if ($item['disabled']) {
                $script .= '
        $(\'[id=' . $id_from . '_div]\').datetimepicker(\'disable\');';
            }
            if ($item['to'] !== FALSE) {
                $script .= '
        $(\'[id=' . $id_to . '_div]\').datetimepicker({
          //pickSeconds: false,
          weekStart: 1,
          startDate: startDate,
          endDate: endDate
        });';
            }
            $script .= '
      });' . PHP_EOL;

            if ($item['presets']) {
                $script .= '
      $(\'select[id=' . $item['id'] . '_preset]\').change(function() {
        var input_from = $(\'input#' . $id_from . '\');
        var input_to   = $(\'input#' . $id_to . '\');
        switch ($(this).val()) {' . PHP_EOL;
                foreach ($presets as $k => $v) {
                    $preset = datetime_preset($k);
                    $script .= "          case '$k':\n";
                    $script .= "            input_from.val('" . $preset['from'] . "');\n";
                    $script .= "            input_to.val('" . $preset['to'] . "');\n";
                    $script .= "            break;\n";
                }
                $script .= '
          default:
            input_from.val("");
            input_to.val("");
            break;
        }
      });';
            }
            register_html_resource('script', $script);
            // End 'datetime'
            break;

        case 'tags': // Tags mostly same as multiselect, but used separate options and Bootstrap Tags Input JS
            register_html_resource('js', 'bootstrap-tagsinput.min.js');   // Enable Tags Input JS
            //register_html_resource('js',  'bootstrap-tagsinput.js');      // Enable Tags Input JS
            register_html_resource('css', 'bootstrap-tagsinput.css');     // Enable Tags Input CSS
            // defaults
            $delimiter      = empty($item['delimiter']) ? ',' : $item['delimiter'];
            $script_begin   = '';
            $script_options = ['trimValue' => 'true',
                               'tagClass'  => 'function(item) {return "label label-default";}',
            ];
            //register_html_resource('script', '$("input[data-role=tagsinput], select[multiple][data-role=tagsinput]").tagsinput({trimValue: true, tagClass: function(item) {return "label label-default";} });');

            $string .= '    <select multiple data-toggle="tagsinput" name="' . $item['id'] . '[]" ';
            $string .= 'id="' . $item['id'] . '" ';

            if ($item['title']) {
                $string .= 'title="' . escape_html($item['title']) . '" ';
            } elseif (isset($item['name'])) {
                $string .= 'title="' . escape_html($item['name']) . '" ';
            }
            if (isset($item['placeholder']) && $item['placeholder'] !== FALSE) {
                if ($item['placeholder'] === TRUE) {
                    $item['placeholder'] = $item['name'];
                }
                //$string .= PHP_EOL;
                $string .= ' placeholder="' . $item['placeholder'] . '"';
                //$item['placeholder'] = TRUE; // Set to true for check at end
            }

            if ($item['disabled']) {
                $string .= ' disabled="1"';
            } elseif ($item['readonly']) {
                $string .= ' disabled="1" readonly="1"'; // Bootstrap Tags Input not support readonly attribute, currently use disable
            }
            if ($item['onchange']) {
                $string .= ' onchange="' . $item['onchange'] . '"';
            }
            $string .= $element_data;            // Add custom data- attribs
            $string .= '>' . PHP_EOL . '      '; // end <select>

            // Process values
            if (!is_array($item['value'])) {
                //$item['value'] = explode($delimiter, $item['value']);
                $item['value'] = [$item['value']];
            }
            //$item['value'] = array('test', 'hello');

            $suggest = [];
            foreach ($item['value'] as $entry) {
                $value = (string)$entry;
                if ($value === '[there is no data]' || $value === '') {
                    continue;
                }
                $suggest[] = $value;

                $string .= '<option value="' . $value . '"';
                $string .= '>' . escape_html($value) . '</option> ';
            }
            $string .= PHP_EOL . '    </select>' . PHP_EOL;

            // Generate typeahead from values
            $item['values'] = (array)$item['values'];
            if (is_array_assoc($item['values'])) {
                // convert associative values to simple
                $item['values'] = array_keys($item['values']);
            }
            $suggest = array_merge($suggest, $item['values']);
            if (safe_count($suggest)) {
                $option = '[{ hint: false, highlight: true, minLength: 1 },
                    { name: "suggest", limit: 16, source: suggest_' . $item['id'] . ' }]';

                $script_begin .= 'var suggest_' . $item['id'] . ' = new Bloodhound({ matchAnyQueryToken: true, queryTokenizer: Bloodhound.tokenizers.nonword, datumTokenizer: Bloodhound.tokenizers.nonword,
        local: [';
                $values       = [];
                foreach (array_unique($suggest) as $k => $entry) {
                    if (is_array($entry)) {
                        $value = (string)$k;
                    } else {
                        $value = (string)$entry;
                    }
                    $values[] = "'" . str_replace("'", "\'", $value) . "'";
                }
                $script_begin .= implode(',', $values);
                $script_begin .= ']});' . PHP_EOL;

                $script_options['typeaheadjs'] = $option;

                // Register scripts/css
                //register_html_resource('js', 'typeahead.bundle.js');
                register_html_resource('js', 'typeahead.bundle.min.js');
                register_html_resource('css', 'typeaheadjs.css');
            }

            if (safe_count($script_options)) {
                $script = $script_begin;
                $script .= "$('#" . $item['id'] . "').tagsinput({" . PHP_EOL;
                foreach ($script_options as $key => &$option) {
                    $option = '  ' . $key . ': ' . $option;
                }
                $script .= implode(',' . PHP_EOL, $script_options) . PHP_EOL;
                $script .= "});";
                register_html_resource('script', $script);
            }
            // End 'tags'
            break;

        case 'multiselect':
            unset($item['icon']); // For now not used icons in multiselect
        case 'select':
            $count_values = safe_count($item['values']);
            if (empty($item['values'])) {
                $item['values']  = [0 => '[there is no data]'];
                $item['subtext'] = FALSE;
            }
            if ($item['type'] === 'multiselect') {
                $string .= '    <select multiple name="' . $item['id'] . '[]" ';
                // Enable Select/Deselect all (if select values count more than 4)
                if ($count_values > 4) {
                    $string .= ' data-actions-box="true" ';
                }
            } else {
                $string .= '    <select name="' . $item['id'] . '" ';
            }
            $string .= 'id="' . $item['id'] . '" ';
            if ($item['title']) {
                $string .= 'title="' . escape_html($item['title']) . '" ';
            } elseif (isset($item['name'])) {
                $string .= 'title="' . escape_html($item['name']) . '" ';
            }

            $data_width = ($item['width']) ? ' data-width="' . $item['width'] . '"' : ' data-width="auto"';
            $data_size  = (is_numeric($item['size'])) ? ' data-size="' . $item['size'] . '"' : ' data-size="15"';
            $string     .= 'class="selectpicker show-tick';
            if ($item['right']) {
                $string .= ' pull-right';
            }
            $string .= '" data-selected-text-format="count>2"';
            if ($item['data-style']) {
                $string .= ' data-style="' . $item['data-style'] . '"';
            }
            // Enable Live search in values list (if select values count more than 12)
            if (($count_values > 12 || $count_values == 0) && $item['live-search'] !== FALSE) {
                $string .= ' data-live-search="true"';
            }

            if ($item['disabled']) {
                $string .= ' disabled="1"';
            } elseif ($item['readonly']) {
                $string .= ' disabled="1" readonly="1"'; // Bootstrap select not support readonly attribute, currently use disable
            }
            if ($item['onchange']) {
                $string .= ' onchange="' . $item['onchange'] . '"';
            }
            $string .= $element_data; // Add custom data- attribs

            $string .= $data_width . $data_size . '>' . PHP_EOL . '      '; // end <select>
            if (!is_array($item['value'])) {
                $item['value'] = [$item['value']];
            }

            // Prepare values for optgroups
            $values   = [];
            $optgroup = [];
            foreach ($item['values'] as $k => $entry) {
                $k     = (string)$k;
                $value = ($item['encode'] ? var_encode($k) : escape_html($k)); // Use base64+serialize encoding
                // Default group is '' (empty string), for allow to use 0 as group name!
                $group = '';
                if (!is_array($entry)) {
                    $entry = ['name' => $entry];
                } elseif (isset($entry['group'])) {
                    $group = $entry['group'];
                }
                if ($item['subtext'] && !isset($entry['subtext'])) {
                    $entry['subtext'] = $k;
                }

                // Icons and empty name fix
                if ($item['icon'] && $item['value'] === ['']) {
                    // Only one main icon
                    $entry['icon'] = $item['icon']; // Set value icon as global icon
                    unset($item['icon']);
                }
                if (in_array($k, $item['value'])) {
                    if (!($k === '' && $entry['name'] === '')) // additionaly skip if value and name empty
                    {
                        if ($item['icon']) {
                            $entry['icon'] = $item['icon']; // Set value icon as global icon
                        }
                        // Element selected
                        $entry['selected'] = TRUE;
                    }
                } elseif ($entry['name'] == '[there is no data]') {
                    $entry['disabled'] = TRUE;
                }
                if (strlen($entry['name']) == 0 && $k !== '') {
                    $entry['name'] = $k;
                } // if name still empty set it as value

                $values[$group][$value] = $entry;
            }

            // Generate optgroups for values
            foreach ($values as $group => $entries) {
                $optgroup[$group] = '';
                foreach ($entries as $value => $entry) {
                    $optgroup[$group] .= '<option value="' . $value . '"'; // already escaped
                    if (isset($entry['subtext']) && strlen($entry['subtext'])) {
                        $optgroup[$group] .= ' data-subtext="' . escape_html($entry['subtext']) . '"';
                    }
                    if ($entry['name'] == '[there is no data]') {
                        $optgroup[$group] .= ' disabled="1"';
                    }

                    if (isset($entry['class']) && $entry['class']) {
                        $optgroup[$group] .= ' class="' . escape_html($entry['class']) . '"';
                    } elseif (isset($entry['style']) && $entry['style']) {
                        $optgroup[$group] .= ' style="' . $entry['style'] . '"';
                    } elseif (isset($entry['color']) && $entry['color']) {
                        $optgroup[$group] .= ' style="color:' . $entry['color'] . ' !important;"';
                        //$optgroup[$group] .= ' data-content="<span style=\'color: ' . $entry['color'] . '\'>' . $entry['name'] . '</span>"';
                    }

                    // Icons
                    if (isset($entry['icon']) && $entry['icon']) {
                        $optgroup[$group] .= ' data-icon="' . $entry['icon'] . '"';
                    }
                    // Disabled, Selected
                    if (isset($entry['disabled']) && $entry['disabled']) {
                        $optgroup[$group] .= ' disabled="1"';
                    } elseif (isset($entry['selected']) && $entry['selected']) {
                        $optgroup[$group] .= ' selected';
                    }

                    $optgroup[$group] .= '>' . escape_html($entry['name']) . '</option> ';
                }
            }

            // If item groups passed, use order passed from it
            $optgroups = array_keys($optgroup);
            if (isset($item['groups'])) {
                $groups    = array_intersect((array)$item['groups'], $optgroups);
                $optgroups = array_diff($optgroups, $groups);
                $optgroups = array_merge($groups, $optgroups);
            }

            if (safe_count($optgroups) === 1) // && isset($optgroup['']))
            {
                // Single optgroup, do not use optgroup tags
                $string .= array_shift($optgroup);
            } else {
                // Multiple optgroups implode
                foreach ($optgroups as $group) {
                    $entry  = $optgroup[$group];
                    $label  = ($group !== '' ? ' label="' . $group . '"' : '');
                    $string .= '<optgroup' . $label . '>' . PHP_EOL;
                    $string .= $entry;
                    $string .= '</optgroup>' . PHP_EOL;
                }
            }

            $string .= PHP_EOL . '    </select>' . PHP_EOL;
            // End 'select' & 'multiselect'
            break;
        case 'button':
        case 'submit':
            $button_type    = $item['type'] === 'button' ? 'button' : 'submit';
            $button_onclick = '';
            if (isset($item['icon_only']) && $item['icon_only'] && $item['icon']) {
                // icon only submit button
                $button_class = 'btn-icon';
                if (!empty($item['class'])) {
                    $button_class .= ' ' . $item['class'];
                }
            } else {
                // classic submit button
                $button_class = 'btn';
                if (!empty($item['class'])) {
                    if (!preg_match('/btn-(default|primary|success|info|warning|danger)/', $item['class'])) {
                        // Add default class if custom class hot have it
                        $button_class .= ' btn-default';
                    }
                    $button_class .= ' ' . $item['class'];
                } else {
                    $button_class .= ' btn-default';
                }
            }
            if ($item['right']) {
                $button_class .= ' pull-right';
            }
            if ($item['form_id'] && $item['id'] === 'search') {
                // Note, used script form_to_path() stored in js/observium.js
                $button_type    = 'button';
                $button_onclick = " onclick=\"form_to_path('" . $item['form_id'] . "');\"";
            }

            if ($item['onclick']) {
                $button_onclick = ' onclick="' . $item['onclick'] . '"';
            }

            $button_disabled = $item['disabled'] || $item['readonly'];
            if ($button_disabled) {
                $button_class .= ' disabled';
            }

            $string .= '      <button id="' . $item['id'] . '" name="' . $item['id'] . '" type="' . $button_type . '"';

            // Add tooltip data
            if ($item['tooltip']) {
                $button_class    .= ' tooltip-from-element';
                $string          .= ' data-tooltip-id="tooltip-' . $item['id'] . '"';
                $element_tooltip .= '<div id="tooltip-' . $item['id'] . '" style="display: none;">' . $item['tooltip'] . '</div>' . PHP_EOL;
            }

            //$string .= ' class="'.$button_class.' text-nowrap" style="line-height: 20px;"'.$button_onclick;
            $string .= ' class="' . $button_class . ' text-nowrap"' . $button_onclick;
            if ($button_disabled) {
                $string .= ' disabled="1"';
            }

            if (isset($item['value'])) {
                $string .= ' value="' . $item['value_escaped'] . '"';
            }
            $string .= $element_data; // Add custom data- attribs
            $string .= '>';
            switch ($item['id']) {
                // Note. 'update' - use POST request, all other - use GET with generate url from js.
                case 'update':
                    $button_icon = 'icon-refresh';
                    $button_name = 'Update';
                    break;
                //case 'submit':
                case 'search':
                    $button_icon = 'icon-search';
                    $button_name = 'Search';
                    break;
                default:
                    $button_icon = '';
                    $button_name = 'Submit';
            }
            $nbsp = 0;
            if (array_key_exists('icon', $item)) {
                $button_icon = trim($item['icon']);
            }
            if (!safe_empty($button_icon)) {
                //$string .= '<i class="'.$button_icon.'" style="margin-right: 0px;"></i>'; // Override margin style, here used "own" margin
                $string .= get_icon($button_icon, $item['icon_class'], ['style' => 'margin-right: 0px;']); // Override margin style, here used "own" margin
                $nbsp++;
            }

            if (array_key_exists('name', $item)) {
                $button_name = trim($item['name']);
            }
            if (!safe_empty($button_name)) {
                $nbsp++;
            }

            if ($nbsp == 2) {
                $string .= '&nbsp;&nbsp;';
            }
            $string .= $button_name . '</button>' . PHP_EOL;
            // End 'button', 'submit'
            break;
        case 'raw':
        case 'html':
            // Just add custom (raw) html element
            if (isset($item['html'])) {
                $string .= $item['html'];
            } else {
                $string .= '<span';
                if (isset($item['class'])) {
                    $string .= ' class="' . $item['class'] . '"';
                }
                $string .= '>' . $item['value'] . '</span>';
            }
            break;
        case 'newline': // Deprecated
            $string .= '<div class="clearfix" id="' . $item['id'] . '">';
            $string .= ($item['hr'] ? '<hr />' : '<hr style="border-width: 0px;" />');
            $string .= '</div>' . PHP_EOL;
            // End 'newline'
            break;
    }

    return ($string . $element_tooltip);
}


function generate_form_values($type, $form_filter = FALSE, $column = NULL, $options = [])
{

    // Set the default filter_mode to 'include' if not provided in options
    if (!isset($options['filter_mode'])) {
        $options['filter_mode'] = 'include';
    }

    $form_items = [];
    switch ($type) {
        case 'example':
            break;
        default:
            // Entity based
            $form_function = 'generate_' . $type . '_form_values';
            if (function_exists($form_function)) {
                return call_user_func_array($form_function, [$form_filter, $column, $options]);
            }
    }

    return $form_items;
}

/**
 * Complex function for generate modal window.
 * Use it when an simple modal used.
 *
 * Used args:
 *  id, title, icon, class, body, footer,
 *  hide (default TRUE), fade (default TRUE), role (default dialog)
 *
 * Note, if used separate functions generate_modal_open(), generate_modal_close()
 * then required to add body content inside div <div class="modal-body"></div>
 * and if also used footer, it should be inside <div class="modal-footer"></div>
 *
 * @param array $args Array with arguments
 *
 * @return string
 */
function generate_modal($args)
{
    /*
    <!-- Modal -->
    <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
      <div class="modal-dialog" role="document">
        <div class="modal-content">
          <div class="modal-header">
            <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
            <h4 class="modal-title" id="myModalLabel">Modal title</h4>
          </div>
          <div class="modal-body">
            ...
          </div>
          <div class="modal-footer">
            <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
            <button type="button" class="btn btn-primary">Save changes</button>
          </div>
        </div>
      </div>
    </div>
    */
    //print_vars($args);

    // Begin & Header
    $string = generate_modal_open($args);

    // Body
    $string .= '      <div class="modal-body">' . PHP_EOL .
               $args['body'] . PHP_EOL .
               '      </div>' . PHP_EOL;

    // Footer
    if (strlen($args['footer'])) {
        $string .= '      <div class="modal-footer">' . PHP_EOL .
                   $args['footer'] . PHP_EOL .
                   '      </div>' . PHP_EOL;
    }

    // End
    $string .= generate_modal_close($args);

    return $string;
}

/**
 * Generates begin of modal window
 * See descriptions for generate_modal()
 *
 * @param array $args Array with arguments
 *
 * @return string
 */
function generate_modal_open(&$args)
{
    if (!isset($args['id'])) {
        $args['id'] = 'modal-' . random_string('4');
    }

    $string = PHP_EOL . '<!-- START modal ' . $args['id'] . ' -->' . PHP_EOL;

    // Create base class
    $base_class = 'modal';
    if (isset($args['hide']) && !$args['hide']) {
    } else // Hide by default
    {
        $base_class .= ' hide';
    }
    if (isset($args['fade']) && !$args['fade']) {
    } else // Fade by default
    {
        $base_class .= ' fade';
    }
    if (!isset($args['role'])) // Role dialog by default
    {
        $args['role'] = 'dialog';
    }
    $args['class'] = (isset($args['class'])) ? ' ' . $args['class'] : '';

    $string .= '<div class="' . $base_class . '" id="' . $args['id'] . '" tabindex="-1"';

    if ($args['role'] === 'dialog') {
        $string .= ' role="dialog" aria-labelledby="' . $args['id'] . '_label">' . PHP_EOL;
    } else {
        $string .= ' role="document">' . PHP_EOL;
    }
    $string .= '  <div class="modal-dialog' . $args['class'] . '" role="document">' . PHP_EOL .
               '    <div class="modal-content">' . PHP_EOL;

    // Header
    $string .= '      <div class="modal-header">' . PHP_EOL .
               '        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>' . PHP_EOL;
    if (isset($args['title'])) {
        $string .= '        <h3 class="modal-title" id="' . $args['id'] . '_label">';
        if ($args['icon']) {
            $string .= get_icon($args['icon']) . '&nbsp;';
        }
        $string .= escape_html($args['title']) . '</h3>' . PHP_EOL;
    }
    $string .= '      </div>' . PHP_EOL;

    return $string;
}

/**
 * Generates end of modal window
 * See descriptions for generate_modal()
 *
 * @param array $args Array with arguments
 *
 * @return string
 */
function generate_modal_close($args)
{
    $string = '    </div>' . PHP_EOL .
              '  </div>' . PHP_EOL .
              '</div>' . PHP_EOL;
    $string .= '<!-- END modal ' . $args['id'] . ' -->' . PHP_EOL;

    return $string;
}

// Modal specific form
function generate_form_modal($form)
{
    // Just return if safety requirements are not fulfilled
    if (isset($form['userlevel']) && $form['userlevel'] > $_SESSION['userlevel']) {
        return '';
    }

    // Return if the user doesn't have write permissions to the relevant entity
    if (isset($form['entity_write_permit']) &&
        !is_entity_write_permitted($form['entity_write_permit']['entity_id'], $form['entity_write_permit']['entity_type'])) {
        return '';
    }

    // Generate only main modal form except header and close
    $form_only = isset($form['form_only']) && $form['form_only'];

    // Time our form filling.
    $form_start = microtime(TRUE);

    // Use modal with form
    if (isset($form['modal_args'])) {
        $modal_args = $form['modal_args'];
        unset($form['modal_args']);
    } else {
        $modal_args = [];
    }

    if (!isset($modal_args['id']) && isset($form['id'])) {
        // Generate modal id from form id
        if (str_starts($form['id'], 'modal-')) {
            $modal_args['id'] = $form['id'];
            $form['id']       = substr($form['id'], 6);
        } else {
            $modal_args['id'] = 'modal-' . $form['id'];
        }
    }
    if (!isset($modal_args['title']) && isset($form['title'])) {
        // Move form title to modal header
        $modal_args['title'] = $form['title'];
        unset($form['title']);
    }

    $form['class']                       = '';             // Clean default box class!
    $form['fieldset']['body']['class']   = 'modal-body';   // Required this class for modal body!
    $form['fieldset']['footer']['class'] = 'modal-footer'; // Required this class for modal footer!

    $modal = !$form_only ? generate_modal_open($modal_args) : '';

    // Save generation time for profiling
    $GLOBALS['form_time'] += utime() - $form_start;

    $modal .= generate_form($form);

    // Time our form filling.
    $form_start = microtime(TRUE);

    if (!$form_only) {
        $modal .= generate_modal_close($modal_args);
    }

    // Save generation time for profiling
    $GLOBALS['form_time'] += utime() - $form_start;

    return $modal;
}

// EOF