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<?php |
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/** |
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* Copyright (C) 2019-2023 Graham Breach |
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* |
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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 Lesser 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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* |
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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 Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser 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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/** |
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* For more information, please contact <graham@goat1000.com> |
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*/ |
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|
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namespace Goat1000\SVGGraph; |
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|
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/** |
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* Class for sorting array by field |
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*/ |
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class FieldSort { |
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|
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private $key = null; |
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private $reverse = false; |
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|
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public function __construct($key, $reverse = false) |
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{ |
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$this->key = $key; |
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$this->reverse = $reverse; |
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} |
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|
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/** |
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* Sorts the array based on value of key field |
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*/ |
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public function sort(&$data) |
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{ |
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$key = $this->key; |
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$get_val = function($a, $key) { |
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return (!isset($a[$key]) || $a[$key] === null ? PHP_INT_MIN : $a[$key]); |
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}; |
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$bigger = function($a, $b, $key) use($get_val) { |
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$va = $get_val($a, $key); |
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$vb = $get_val($b, $key); |
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if($va == $vb) |
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return 0; |
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return $va > $vb ? 1 : -1; |
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}; |
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$smaller = function($a, $b, $key) use($get_val) { |
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$va = $get_val($a, $key); |
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$vb = $get_val($b, $key); |
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if($va == $vb) |
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return 0; |
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return $va < $vb ? 1 : -1; |
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}; |
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$fn = $this->reverse ? $smaller : $bigger; |
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usort($data, function($a, $b) use($key, $fn) { |
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return $fn($a, $b, $key); |
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}); |
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} |
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} |
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