/
is-the-electric-garage-door-open.php
180 lines (143 loc) · 4.73 KB
/
is-the-electric-garage-door-open.php
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<?php
/**
* Code Golf: Is the electric garage door open?
*
* @link http://codegolf.stackexchange.com/questions/79668/is-the-electric-garage-door-open
*/
// Include the code-golf framework; it loads the testing frameworks
require 'a/CodeGolfFramework.php';
/**
* A class for the problem at hand
*/
class ElectricGarageDoor extends ACodeGolfProblem
{
/////////////////////////////////////////////////////////////////////////
// Actions
//
/**
* Run all the tests; this method is invoked when the program is launched without arguments
*
* @return int
*/
public function runTests()
{
// Run the test cases provided in the problem
$this->testDoorStatus([], '100% D');
$this->testDoorStatus([20], '0% U');
$this->testDoorStatus([10], '0% U');
$this->testDoorStatus([5], '50% D');
$this->testDoorStatus([20, 20], '100% D');
$this->testDoorStatus([10, 10], '100% D');
$this->testDoorStatus([5, 5], '0% U');
$this->testDoorStatus([1, 2, 3], '100% D');
$this->testDoorStatus([8, 9, 10, 11], '0% U');
$this->testDoorStatus([11, 10, 9, 8, 7], '20% U');
return 0;
}
/**
* Test helper. Test both scripts (plain and golfed version) using the test framework.
* Check their actual output against the expected output.
*
* @param int[] $delays the input argument (the number of seconds to wait before pushing the button)
* @param string $expected the expected program output
*/
protected function testDoorStatus(array $delays, $expected)
{
// Format the input for display
$input = implode(' ', $delays);
// Put the script path in front of the arguments; the real program gets its arguments from the command line
array_unshift($delays, __FILE__);
// Test the plain-code function
it(
sprintf("turns input '%s' into output '%s' -- clear version", $input, $expected),
$this->getFunctionOutput(function () use ($delays) { $this->handleDoor($delays); }) === $expected
);
// Test the golfed function
it(
sprintf("turns input '%s' into output '%s' -- golfed version", $input, $expected),
$this->getFunctionOutput(function () use ($delays) { $this->hndlDr($delays); }) === $expected
);
}
/////////////////////////////////////////////////////////////////////////
// Handling of the golfed code
//
/**
* Return the golfed source code.
*
* @return string
*/
public function getTheGolfedCode()
{
// It's the code of self::hndlDr() method
return parent::getFunctionBody('hndlDr', __CLASS__);
}
/**
* Run the golfed code using the arguments provided in the command line.
* Throw an InvalidArgumentException when this is not possible.
*
* @param int $argc
* @param array $argv
* @return int the exit code
* @throws InvalidArgumentException
*/
public function runTheGolfedCode($argc, array $argv)
{
// Run the code
$this->hndlDr($argv);
echo("\n");
// Success
return 0;
}
/////////////////////////////////////////////////////////////////////////
// The solution of the problem
//
/**
* This is the plain code.
*
* @param array $listDelays
* @return int
*/
private function handleDoor(array $listDelays)
{
// The door is down (0% open)
$pos = 0; // 0 .. 10
// It will move up
$dir = +10;
// The initial button push starts the door moving up
$run = 0;
// Handle each button push
foreach ($listDelays as $delay) {
if ($run) {
$pos = min(max($pos + $delay * $dir, 0), 100);
if (0 < $pos && $pos < 100) {
$run = 0;
}
$dir = -$dir;
} else {
$run = 1;
}
}
// Complete the last move, if any
if ($run) {
$pos = min(max($pos + 10 * $dir, 0), 100);
$dir = - $dir;
$run = 0;
}
echo $pos . '% ' . ($dir + 10 ? 'U' : 'D');
}
/**
* This is the golfed code.
*
* @param array $argv
* @return string
*/
private function hndlDr(array $argv)
{
$d=$argv[]=10;foreach($argv as$a)if($r){$p=min(max($p+$a*$d,0),100);$r=$p<1||99<$p;$d=-$d;}else$r=1;echo"$p% ".DU[$d>0];
}
}
/////////////////////////////////////////////////////////////////////////
// Create the problem and let it run
//
exit((new ElectricGarageDoor($argc, $argv))->run());
// This is the end of file; no closing PHP tag