app/Module/TopSurnamesModule.php

<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
namespace Fisharebest\Webtrees\Module;

use Fisharebest\Webtrees\Auth;
use Fisharebest\Webtrees\Filter;
use Fisharebest\Webtrees\Functions\FunctionsDb;
use Fisharebest\Webtrees\Functions\FunctionsPrintLists;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Query\QueryName;
use Fisharebest\Webtrees\Tree;

/**
 * Class TopSurnamesModule
 */
class TopSurnamesModule extends AbstractModule implements ModuleBlockInterface
{
    // Default values for new blocks.
    const DEFAULT_NUMBER = 10;
    const DEFAULT_STYLE  = 'table';

    /**
     * How should this module be labelled on tabs, menus, etc.?
     *
     * @return string
     */
    public function getTitle()
    {
        return /* I18N: Name of a module. Top=Most common */
            I18N::translate('Top surnames');
    }

    /**
     * A sentence describing what this module does.
     *
     * @return string
     */
    public function getDescription()
    {
        return /* I18N: Description of the “Top surnames” module */
            I18N::translate('A list of the most popular surnames.');
    }

    /**
     * Generate the HTML content of this block.
     *
     * @param Tree     $tree
     * @param int      $block_id
     * @param bool     $template
     * @param string[] $cfg
     *
     * @return string
     */
    public function getBlock(Tree $tree, int $block_id, bool $template = true, array $cfg = []): string
    {
        global $ctype;

        $num       = $this->getBlockSetting($block_id, 'num', self::DEFAULT_NUMBER);
        $infoStyle = $this->getBlockSetting($block_id, 'infoStyle', self::DEFAULT_STYLE);

        extract($cfg, EXTR_OVERWRITE);

        // This next function is a bit out of date, and doesn't cope well with surname variants
        $top_surnames = FunctionsDb::getTopSurnames($tree->getTreeId(), 0, $num);

        $all_surnames = [];
        $i            = 0;
        foreach (array_keys($top_surnames) as $top_surname) {
            $all_surnames = array_merge($all_surnames, QueryName::surnames($tree, $top_surname, '', false, false));
            if (++$i == $num) {
                break;
            }
        }
        if ($i < $num) {
            $num = $i;
        }

        switch ($infoStyle) {
            case 'tagcloud':
                uksort($all_surnames, '\Fisharebest\Webtrees\I18N::strcasecmp');
                $content = FunctionsPrintLists::surnameTagCloud($all_surnames, 'individual-list', true, $tree);
                break;
            case 'list':
                uasort($all_surnames, '\Fisharebest\Webtrees\Module\TopSurnamesModule::surnameCountSort');
                $content = FunctionsPrintLists::surnameList($all_surnames, 1, true, 'individual-list', $tree);
                break;
            case 'array':
                uasort($all_surnames, '\Fisharebest\Webtrees\Module\TopSurnamesModule::surnameCountSort');
                $content = FunctionsPrintLists::surnameList($all_surnames, 2, true, 'individual-list', $tree);
                break;
            case 'table':
            default:
                uasort($all_surnames, '\Fisharebest\Webtrees\Module\TopSurnamesModule::surnameCountSort');
                $content = view('lists/surnames-table', [
                    'surnames' => $all_surnames,
                    'route'    => 'individual-list',
                    'tree'     => $tree,
                ]);
                break;
        }

        if ($template) {
            if ($num == 1) {
                // I18N: i.e. most popular surname.
                $title = I18N::translate('Top surname');
            } else {
                // I18N: Title for a list of the most common surnames, %s is a number. Note that a separate translation exists when %s is 1
                $title = I18N::plural('Top %s surname', 'Top %s surnames', $num, I18N::number($num));
            }

            if ($ctype === 'gedcom' && Auth::isManager($tree)) {
                $config_url = route('tree-page-block-edit', [
                    'block_id' => $block_id,
                    'ged'      => $tree->getName(),
                ]);
            } elseif ($ctype === 'user' && Auth::check()) {
                $config_url = route('user-page-block-edit', [
                    'block_id' => $block_id,
                    'ged'      => $tree->getName(),
                ]);
            } else {
                $config_url = '';
            }

            return view('modules/block-template', [
                'block'      => str_replace('_', '-', $this->getName()),
                'id'         => $block_id,
                'config_url' => $config_url,
                'title'      => $title,
                'content'    => $content,
            ]);
        } else {
            return $content;
        }
    }

    /** {@inheritdoc} */
    public function loadAjax(): bool
    {
        return false;
    }

    /** {@inheritdoc} */
    public function isUserBlock(): bool
    {
        return true;
    }

    /** {@inheritdoc} */
    public function isGedcomBlock(): bool
    {
        return true;
    }

    /**
     * An HTML form to edit block settings
     *
     * @param Tree $tree
     * @param int  $block_id
     *
     * @return void
     */
    public function configureBlock(Tree $tree, int $block_id)
    {
        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
            $this->setBlockSetting($block_id, 'num', Filter::postInteger('num', 1, 10000, 10));
            $this->setBlockSetting($block_id, 'infoStyle', Filter::post('infoStyle', 'list|array|table|tagcloud', self::DEFAULT_STYLE));

            return;
        }

        $num       = $this->getBlockSetting($block_id, 'num', self::DEFAULT_NUMBER);
        $infoStyle = $this->getBlockSetting($block_id, 'infoStyle', self::DEFAULT_STYLE);

        $info_styles = [
            'list'     => /* I18N: An option in a list-box */
                I18N::translate('bullet list'),
            'array'    => /* I18N: An option in a list-box */
                I18N::translate('compact list'),
            'table'    => /* I18N: An option in a list-box */
                I18N::translate('table'),
            'tagcloud' => /* I18N: An option in a list-box */
                I18N::translate('tag cloud'),
        ];

        echo view('modules/top10_surnames/config', [
            'num'         => $num,
            'infoStyle'   => $infoStyle,
            'info_styles' => $info_styles,
        ]);
    }

    /**
     * Sort (lists of counts of similar) surname by total count.
     *
     * @param string[][] $a
     * @param string[][] $b
     *
     * @return int
     */
    private static function surnameCountSort($a, $b)
    {
        $counta = 0;
        foreach ($a as $x) {
            $counta += count($x);
        }
        $countb = 0;
        foreach ($b as $x) {
            $countb += count($x);
        }

        return $countb - $counta;
    }
}