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67 lines
2.0 KiB
Dart
67 lines
2.0 KiB
Dart
/*
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* This file is part of wger Workout Manager <https://github.com/wger-project>.
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* Copyright (C) 2020, 2021 wger Team
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*
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* wger Workout Manager is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* wger Workout Manager 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero 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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/// Calculates the number of plates needed to reach a specific weight
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List<num> plateCalculator(num totalWeight, num barWeight, List<num> plates) {
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final List<num> result = [];
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final sortedPlates = List.of(plates)..sort();
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// Weight is less than the bar
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if (totalWeight < barWeight) {
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return [];
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}
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if (sortedPlates.isEmpty) {
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return [];
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}
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// Remove the bar and divide by two to get weight on each side
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totalWeight = (totalWeight - barWeight) / 2;
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// Weight can't be divided with the smallest plate
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if (totalWeight % sortedPlates.first > 0) {
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return [];
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}
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// Iterate through the plates, beginning with the biggest ones
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for (final plate in sortedPlates.reversed) {
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while (totalWeight >= plate) {
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totalWeight -= plate;
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result.add(plate);
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}
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}
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return result;
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}
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/// Groups a list of plates as calculated by [plateCalculator]
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///
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/// e.g. [15, 15, 15, 10, 10, 5] returns {15: 3, 10: 2, 5: 1}
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Map<num, int> groupPlates(List<num> plates) {
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final Map<num, int> out = {};
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for (final plate in plates) {
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if (!out.containsKey(plate)) {
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out[plate] = 1;
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} else {
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out[plate] = out[plate]! + 1;
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}
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}
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return out;
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}
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