app/Module/ResearchTaskModule.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\Database;
use Fisharebest\Webtrees\Filter;
use Fisharebest\Webtrees\GedcomRecord;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Tree;

/**
 * Class ResearchTaskModule
 */
class ResearchTaskModule extends AbstractModule implements ModuleBlockInterface
{
    const DEFAULT_SHOW_OTHER      = '1';
    const DEFAULT_SHOW_UNASSIGNED = '1';
    const DEFAULT_SHOW_FUTURE     = '1';
    const DEFAULT_BLOCK           = '1';

    /** {@inheritdoc} */
    public function getTitle()
    {
        return /* I18N: Name of a module. Tasks that need further research. */
            I18N::translate('Research tasks');
    }

    /** {@inheritdoc} */
    public function getDescription()
    {
        return /* I18N: Description of “Research tasks” module */
            I18N::translate('A list of tasks and activities that are linked to the family tree.');
    }

    /**
     * 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;

        $show_other      = $this->getBlockSetting($block_id, 'show_other', self::DEFAULT_SHOW_OTHER);
        $show_unassigned = $this->getBlockSetting($block_id, 'show_unassigned', self::DEFAULT_SHOW_UNASSIGNED);
        $show_future     = $this->getBlockSetting($block_id, 'show_future', self::DEFAULT_SHOW_FUTURE);

        extract($cfg, EXTR_OVERWRITE);

        $end_jd = $show_future ? 99999999 : WT_CLIENT_JD;

        $xrefs = Database::prepare(
            "SELECT DISTINCT d_gid FROM `##dates`" .
            " WHERE d_file = :tree_id AND d_fact = '_TODO' AND d_julianday1 < :jd"
        )->execute([
            'tree_id' => $tree->getTreeId(),
            'jd'      => $end_jd,
        ])->fetchOneColumn();

        $records = array_map(function ($xref) use ($tree) {
            return GedcomRecord::getInstance($xref, $tree);
        }, $xrefs);

        $tasks = [];

        foreach ($records as $record) {
            foreach ($record->getFacts('_TODO') as $task) {
                $user_name = $task->getAttribute('_WT_USER');

                if ($user_name === Auth::user()->getUserName() || empty($user_name) && $show_unassigned || !empty($user_name) && $show_other) {
                    $tasks[] = $task;
                }
            }
        }

        if (empty($records)) {
            $content = '<p>' . I18N::translate('There are no research tasks in this family tree.') . '</p>';
        } else {
            $content = view('modules/todo/research-tasks', ['tasks' => $tasks]);
        }

        if ($template) {
            if ($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'      => $this->getTitle(),
                '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, 'show_other', Filter::postBool('show_other'));
            $this->setBlockSetting($block_id, 'show_unassigned', Filter::postBool('show_unassigned'));
            $this->setBlockSetting($block_id, 'show_future', Filter::postBool('show_future'));

            return;
        }

        $show_other      = $this->getBlockSetting($block_id, 'show_other', self::DEFAULT_SHOW_OTHER);
        $show_unassigned = $this->getBlockSetting($block_id, 'show_unassigned', self::DEFAULT_SHOW_UNASSIGNED);
        $show_future     = $this->getBlockSetting($block_id, 'show_future', self::DEFAULT_SHOW_FUTURE);

        echo view('modules/todo/config', [
            'show_future'     => $show_future,
            'show_other'      => $show_other,
            'show_unassigned' => $show_unassigned,
        ]);

    }
}