yf_locale_editor_autotranslate admin module

    public function autotranslate()
    {
        $a['back_link'] = url('/@object/vars');
        $a['redirect_link'] = $a['back_link'];
        ! $a['lang_from'] && $a['lang_from'] = 'en';
        ! isset($a['max_items']) && $a['max_items'] = 100;
        ! isset($a['keep_existing']) && $a['keep_existing'] = 1;
        // To ensure that currently active langs are in top of the list
        $langs = [];
        foreach ((array) $this->_parent->_cur_langs as $lang => $name) {
            $langs[$lang] = $name;
        }
        $langs[''] = '-------------';
        foreach ((array) $this->_parent->_langs as $lang => $name) {
            $langs[$lang] = $name;
        }
        $display_func = function () {
            return ! is_post();
        };
        return $this->_parent->_header_links() . '<div class="col-md-12"><br>' .
            form($a + (array) $_POST)
            ->validate([
                'lang_from' => 'required',
                'lang_to' => 'required',
                'max_items' => 'required',
            ])
            ->on_validate_ok(function ($data, $e, $vr, $form) {
                return $this->_on_validate_ok($data, $form);
            })
            ->select_box('lang_from', $this->_parent->_cur_langs, ['display_func' => $display_func])
            ->select_box('lang_to', $langs, ['display_func' => $display_func])
            ->number('max_items', ['class_add' => 'input-small', 'display_func' => $display_func])
            ->yes_no_box('keep_existing', ['display_func' => $display_func])
            ->save_and_back('', ['desc' => 'Translate', 'display_func' => $display_func])
        . '</div>';
    }

    public function _init()
    {
        $this->_parent = module('locale_editor');
    }

    public function _on_validate_ok($params = [], $form = null)
    {
        $stats = null;
        $p = $params ?: $_POST;
        $lang = $p['lang_to'];
        $lang_from = ($p['lang_from'] ?? null) ?: 'en';
        $max_items = (int) $p['max_items'];
        $keep_existing = $p['keep_existing'];

        $to_tr = [];
        foreach ((array) $this->_parent->_get_all_vars() as $source => $a) {
            // Fix for source vars written in russian
            if ($lang_from == 'en' && preg_match('~[а-яА-Я]+~imsu', $source)) {
                continue;
            }
            $tr = isset($a['translation'][$lang]) ? $a['translation'][$lang] : null;
            if ($keep_existing && $tr) {
                continue;
            }
            if ( ! strlen($tr) || _strtolower($tr) == _strtolower($source)) {
                $to_tr[$source] = $a['var_id'];
            }
            if (count((array) $to_tr) >= $max_items) {
                break;
            }
        }
        if ( ! $to_tr) {
            common()->message_info('Translate finished, 0 variables to translate');
            return;
        }
        set_time_limit(300 + $max_items * 5);

        $services = services();

        $to_update = [];
        $failed = [];
        $not_tr = null;
        $stats = null;
        // var_id can be empty if it is got from files
        foreach ((array) $to_tr as $source => $var_id) {
            $source_for_tr = $source;
            // cutoff all vars starting from % or @
            $map = [];
            $need_map = (false !== strpos($source_for_tr, '%') || false !== strpos($source_for_tr, '@'));
            if ($need_map && preg_match_all('~(?<var>[%@][a-z0-9_-]+)~ims', $source_for_tr, $m)) {
                foreach ((array) $m['var'] as $i => $str) {
                    $map[$str] = '{' . $i . '}';
                }
                if ($map) {
                    $source_for_tr = strtr($source_for_tr, $map);
                }
            }
            $source_for_tr = str_replace('_', ' ', $source_for_tr);
            $tr = $services->google_translate($source_for_tr, $lang_from, $lang);
            if (strlen($tr) && $map) {
                $tr = strtr($tr, array_flip($map));
            }
            if (strlen($tr) && _strtolower($tr) != _strtolower($source)) {
                $to_update[$source] = _strtolower($tr);
            } else {
                $not_tr[$source] = $tr;
                $stats['failed']++;
            }
        }
        $to_replace = [];
        $existing_tr = from('locale_translate')->where('locale', $lang)->get_2d('var_id,value');
        foreach ((array) $to_update as $source => $tr) {
            $var_id = $to_tr[$source];
            if ( ! $var_id) {
                db()->insert_safe('locale_vars', ['value' => $source]);
                $var_id = (int) db()->insert_id();
            }
            if ($var_id) {
                if (isset($existing_tr[$var_id]) && $existing_tr[$var_id] != $tr) {
                    $to_replace[$var_id] = [
                        'var_id' => (int) $var_id,
                        'locale' => $lang,
                        'value' => $tr,
                    ];
                }
                $stats['updated']++;
            }
        }
        if ($to_replace) {
            db()->replace_safe('locale_translate', $to_replace);
        }
        $stats['failed'] && common()->message_warning($stats['failed'] . ' variable(s) failed to translate');
        $stats['updated'] && common()->message_success($stats['updated'] . ' variable(s) successfully translated');
        ! $stats && common()->message_info('Translate done, nothing changed');

        cache_del('locale_translate_' . $lang);

        $form->container(a(['href' => '/@object/@action', 'title' => 'Back', 'icon' => 'fa fa-arrow-left', 'class' => 'btn btn-primary btn-small', 'target' => '']), ['wide' => true]);
        $to_update && $form->container($this->_parent->_pre_text(_var_export(_prepare_html($to_update))), ['wide' => true]);
        $not_tr && $form->container($this->_parent->_pre_text(_var_export(_prepare_html($not_tr))), ['wide' => true]);
    }