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<?php declare(strict_types=1); |
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use Stratadox\PuzzleSolver\Find; |
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use Stratadox\PuzzleSolver\NoSolution; |
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use Stratadox\PuzzleSolver\PuzzleDescription; |
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use Stratadox\PuzzleSolver\PuzzleFactory; |
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use Stratadox\PuzzleSolver\PuzzleSolverFactory; |
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use Stratadox\PuzzleSolver\Renderer\MovesToFileRenderer; |
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use Stratadox\PuzzleSolver\Renderer\PuzzleStatesToFileRenderer; |
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use Stratadox\PuzzleSolver\SearchSettings; |
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use Stratadox\PuzzleSolver\SolutionRenderer; |
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use Stratadox\PuzzleSolver\Solutions; |
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require dirname(__DIR__) . '/vendor/autoload.php'; |
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const OUT = 'php://stdout'; |
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$directory = dirname(__DIR__) . str_replace( |
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'/', |
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DIRECTORY_SEPARATOR, |
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'/sample/levels/%s/' |
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); |
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$json = file_get_contents(dirname(__DIR__) . '/sample/puzzles.json'); |
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$puzzleInfo = gatherPuzzleData(json_decode($json, true), $directory); |
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$puzzleName = choosePuzzle($puzzleInfo); |
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echo PHP_EOL . 'Selected puzzle: ' . $puzzleName . PHP_EOL . PHP_EOL; |
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$levelTag = chooseLevel($puzzleInfo[$puzzleName]); |
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$puzzleData = $puzzleInfo[$puzzleName][$levelTag]; |
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$level = file_get_contents($puzzleData['levelFile']); |
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if (!empty($level)) { |
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echo 'The chosen level is: ' . PHP_EOL . $level . PHP_EOL . PHP_EOL; |
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} |
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$settings = chooseSettings(); |
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$solutions = solvePuzzle( |
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$puzzleData['factory'], |
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$puzzleData['description'], |
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$settings, |
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$level |
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); |
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render($solutions, $puzzleData['renderer']); |
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function gatherPuzzleData(array $puzzleData, string $directory): array |
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{ |
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$factories = []; |
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foreach ($puzzleData['factories'] as $type => $factory) { |
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assert(is_callable($factory)); |
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$factories[$type] = $factory(); |
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} |
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$sep = str_repeat(PHP_EOL, 40); |
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$time = 600000; |
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$puzzleInfo = []; |
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foreach ($puzzleData['puzzles'] as $puzzle) { |
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$dir = sprintf($directory, $puzzle['type']); |
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$description = new PuzzleDescription( |
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Find::fromString($puzzle['find']), |
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$puzzle['variable_cost'] ?? false, |
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$puzzle['exhausting'] ?? false, |
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isset($puzzle['heuristic']) ? new $puzzle['heuristic']() : null |
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); |
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$renderer = ($puzzle['display'] ?? 'states') === 'states' ? |
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PuzzleStatesToFileRenderer::fromFilenameAndSeparator(OUT, $sep, $time) : |
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MovesToFileRenderer::fromFilenameAndSeparator(OUT, $sep, $time); |
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$puzzleInfo[$puzzle['name']] = []; |
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foreach (scandir($dir) as $file) { |
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if (substr($file, -4) !== '.txt') { |
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continue; |
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} |
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$puzzleInfo[$puzzle['name']][$file[0]] = [ |
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'levelFile' => $dir . $file, |
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'factory' => $factories[$puzzle['type']], |
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'description' => $description, |
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'renderer' => $renderer, |
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'isDefault' => (($puzzle['default'] ?? '') . '.txt') === $file, |
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'isTheOnlyOne' => (bool) ($puzzle['level'] ?? false), |
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]; |
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} |
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} |
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return $puzzleInfo; |
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} |
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function choosePuzzle(array $puzzleInfo): string |
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{ |
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$puzzleChoices = array_keys($puzzleInfo); |
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$welcome = [ |
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'Welcome to the universal puzzle solver!', |
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'The following puzzles are installed:' |
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]; |
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foreach ($puzzleChoices as $n => $name) { |
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$welcome[] = sprintf('Type %d: %s', $n + 1, $name); |
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} |
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echo implode(PHP_EOL, $welcome) . PHP_EOL . PHP_EOL; |
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do { |
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$puzzleChoice = (int) (readline('Which puzzle would you like to solve? ')) - 1; |
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} while (!isset($puzzleChoices[$puzzleChoice])); |
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return $puzzleChoices[$puzzleChoice]; |
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} |
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function chooseLevel(array $puzzleInfo): string |
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{ |
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$welcome = [ |
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'The following levels are available:' |
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]; |
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foreach ($puzzleInfo as $letter => $puzzleDate) { |
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if ($puzzleDate['isTheOnlyOne']) { |
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return $letter; |
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} |
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$n = str_replace(' ', '', substr(basename($puzzleDate['levelFile']), 2, -4)); |
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$welcome[] = sprintf('%s: %s', $letter, $n); |
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} |
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echo implode(PHP_EOL, $welcome) . PHP_EOL . PHP_EOL; |
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do { |
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$levelChoice = strtoupper(readline('Which level would you like to solve? ')); |
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if (!isset($puzzleInfo[$levelChoice])) { |
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echo sprintf('Level %s not found!', $levelChoice) . PHP_EOL; |
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$levelChoice = ''; |
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} |
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} while (strlen($levelChoice) !== 1); |
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return $levelChoice; |
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} |
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function chooseSettings() |
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{ |
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$visual = readline('Would you like to visualise the search? [Y]/n '); |
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if ($visual !== '' && strtolower($visual) !== 'y') { |
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return SearchSettings::defaults(); |
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} |
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return new SearchSettings(OUT, str_repeat(PHP_EOL, 40), 80000); |
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} |
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function solvePuzzle( |
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PuzzleFactory $puzzleFactory, |
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PuzzleDescription $description, |
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SearchSettings $settings, |
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string $level |
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): Solutions { |
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$puzzle = $puzzleFactory->fromString($level); |
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$solver = PuzzleSolverFactory::make() |
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->forAPuzzleWith($description, $settings); |
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echo PHP_EOL . 'Solving the puzzle...' . PHP_EOL; |
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try { |
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return $solver->solve($puzzle); |
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} catch (NoSolution $exception) { |
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die($exception->getMessage()); |
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} |
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} |
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function render(Solutions $solutions, SolutionRenderer $renderer) |
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{ |
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$nl = str_repeat(PHP_EOL, 40); |
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echo $nl . 'Solved!' . str_repeat(PHP_EOL, 5); |
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sleep(1); |
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if (count($solutions) === 1) { |
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$renderer->render($solutions[0]); |
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echo $nl . $solutions[0]->state()->representation(); |
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} else { |
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foreach ($solutions as $i => $solution) { |
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echo sprintf('%sSolution %d: %s', $nl, $i + 1, str_repeat(PHP_EOL, 5)); |
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sleep(1); |
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echo $nl; |
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$renderer->render($solution); |
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echo $nl . $solution->state()->representation(); |
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} |
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} |
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} |
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For hinted functions/methods where all return statements with the correct type are only reachable via conditions, ?null? gets implicitly returned which may be incompatible with the hinted type. Let?s take a look at an example: