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<?php |
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/** |
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* webtrees: online genealogy |
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* Copyright (C) 2019 webtrees development team |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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declare(strict_types=1); |
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namespace Fisharebest\Webtrees\Services; |
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use Closure; |
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use Illuminate\Database\Query\Builder; |
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use Illuminate\Database\Query\Expression; |
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use Illuminate\Support\Collection; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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/** |
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* Paginate and search queries for datatables. |
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* |
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* @link http://www.datatables.net/usage/server-side |
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*/ |
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class DatatablesService |
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{ |
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/** |
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* Apply filtering and pagination to a collection, and generate a response suitable for datatables. |
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* |
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* @param ServerRequestInterface $request Includes the datatables request parameters. |
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* @param Collection $collection All the data. |
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* @param string[]|int[] $search_columns The names of searchable columns. |
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* @param string[]|int[] $sort_columns Sort column mapping. |
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* @param Closure $callback Converts a row-object to an array-of-columns. |
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* |
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* @return ResponseInterface |
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*/ |
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public function handleCollection(ServerRequestInterface $request, Collection $collection, array $search_columns, array $sort_columns, Closure $callback): ResponseInterface |
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{ |
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$search = $request->getQueryParams()['search']['value'] ?? ''; |
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$start = (int) ($request->getQueryParams()['start'] ?? 0); |
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$length = (int) ($request->getQueryParams()['length'] ?? 0); |
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$order = $request->getQueryParams()['order'] ?? []; |
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$draw = (int) ($request->getQueryParams()['draw'] ?? 0); |
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// Count unfiltered records |
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$recordsTotal = $collection->count(); |
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// Filtering |
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if ($search !== '') { |
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$collection = $collection->filter(static function (array $row) use ($search, $search_columns): bool { |
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foreach ($search_columns as $search_column) { |
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if (stripos($row[$search_column], $search) !== false) { |
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return true; |
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} |
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} |
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return false; |
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}); |
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} |
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// Sorting |
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if ($order !== []) { |
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$collection = $collection->sort(static function (array $row1, array $row2) use ($order, $sort_columns): int { |
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foreach ($order as $column) { |
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$key = $sort_columns[$column['column']]; |
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$dir = $column['dir']; |
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if ($dir === 'asc') { |
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$comparison = $row1[$key] <=> $row2[$key]; |
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} else { |
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$comparison = $row2[$key] <=> $row1[$key]; |
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} |
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if ($comparison !== 0) { |
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return $comparison; |
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} |
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} |
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return 0; |
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}); |
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} |
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// Paginating |
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if ($length > 0) { |
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$recordsFiltered = $collection->count(); |
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$data = $collection->slice($start, $length); |
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} else { |
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$recordsFiltered = $collection->count(); |
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$data = $collection; |
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} |
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$data = $data->map($callback)->values()->all(); |
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return response([ |
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'draw' => $draw, |
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'recordsTotal' => $recordsTotal, |
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'recordsFiltered' => $recordsFiltered, |
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'data' => $data, |
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]); |
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} |
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/** |
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* Apply filtering and pagination to a database query, and generate a response suitable for datatables. |
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* |
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* @param ServerRequestInterface $request Includes the datatables request parameters. |
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* @param Builder $query A query to fetch the unfiltered rows and columns. |
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* @param string[] $search_columns The names of searchable columns. |
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* @param string[] $sort_columns Sort column mapping. |
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* @param Closure $callback Converts a row-object to an array-of-columns. |
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* |
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* @return ResponseInterface |
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*/ |
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public function handleQuery(ServerRequestInterface $request, Builder $query, array $search_columns, array $sort_columns, Closure $callback): ResponseInterface |
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{ |
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$search = $request->getQueryParams()['search']['value'] ?? ''; |
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$start = (int) ($request->getQueryParams()['start'] ?? 0); |
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$length = (int) ($request->getQueryParams()['length'] ?? 0); |
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$order = $request->getQueryParams()['order'] ?? []; |
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$draw = (int) ($request->getQueryParams()['draw'] ?? 0); |
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// Count unfiltered records |
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$recordsTotal = (clone $query)->count(); |
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// Filtering |
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if ($search !== '') { |
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$query->where(static function (Builder $query) use ($search, $search_columns): void { |
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foreach ($search_columns as $search_column) { |
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$query->whereContains($search_column, $search, 'or'); |
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} |
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}); |
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} |
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// Sorting |
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if ($order !== []) { |
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foreach ($order as $value) { |
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// Columns in datatables are numbered from zero. |
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// Columns in MySQL are numbered starting with one. |
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// If not specified, the Nth table column maps onto the Nth query column. |
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$sort_column = $sort_columns[$value['column']] ?? new Expression(1 + $value['column']); |
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$query->orderBy($sort_column, $value['dir']); |
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} |
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} else { |
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$query->orderBy(new Expression(1)); |
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} |
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// Paginating |
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if ($length > 0) { |
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$recordsFiltered = (clone $query)->count(); |
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$query->skip($start)->limit($length); |
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$data = $query->get(); |
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} else { |
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$data = $query->get(); |
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$recordsFiltered = $data->count(); |
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} |
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$data = $data->map($callback)->all(); |
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return response([ |
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'draw' => $draw, |
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'recordsTotal' => $recordsTotal, |
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'recordsFiltered' => $recordsFiltered, |
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'data' => $data, |
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]); |
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} |
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} |
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