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UnixDisk::volumes()   A
last analyzed

Complexity

Conditions 1
Paths 1

Size

Total Lines 4
Code Lines 2

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 1
CRAP Score 1

Importance

Changes 1
Bugs 0 Features 1
Metric Value
cc 1
eloc 2
c 1
b 0
f 1
nc 1
nop 0
dl 0
loc 4
rs 10
ccs 1
cts 1
cp 1
crap 1
1
<?php
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declare(strict_types = 1);
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namespace Innmind\Server\Status\Server\Disk;
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use Innmind\Server\Status\{
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    Server\Disk,
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    Server\Disk\Volume\MountPoint,
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    Server\Disk\Volume\Usage,
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    Server\Memory\Bytes,
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    Exception\DiskUsageNotAccessible,
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};
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use Innmind\Immutable\{
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    Str,
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    Sequence,
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    Map,
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};
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use Symfony\Component\Process\Process;
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final class UnixDisk implements Disk
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{
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    private static array $columns = [
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        'Size' => 'size',
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        'Used' => 'used',
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        'Avail' => 'available',
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        'Use%' => 'usage',
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        'Capacity' => 'usage',
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        'Mounted' => 'mountPoint',
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    ];
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    /**
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     * {@inheritdoc}
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     */
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    public function volumes(): Map
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    {
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        return $this->parse(
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            $this->run('df -lh'),
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        );
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    }
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    public function get(MountPoint $point): Volume
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    {
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        return $this
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            ->volumes()
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            ->get($point->toString());
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    }
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    private function run(string $command): Str
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    {
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        $process = Process::fromShellCommandline($command);
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        $process->run();
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        if (!$process->isSuccessful()) {
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            throw new DiskUsageNotAccessible;
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        }
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        return Str::of($process->getOutput());
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    }
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    /**
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     * @return Map<string, Volume>
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     */
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    private function parse(Str $output): Map
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    {
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        $lines = $output
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            ->trim()
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            ->split("\n");
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        $columns = $lines
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            ->first()
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            ->pregSplit('~ +~')
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            ->reduce(
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                Sequence::strings(),
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                static function(Sequence $columns, Str $column): Sequence {
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                    $column = $column->toString();
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                    return ($columns)(self::$columns[$column] ?? $column);
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                },
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            );
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        /** @var Sequence<Sequence<Str>> */
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        $partsByLine = $lines
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            ->drop(1)
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            ->reduce(
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                Sequence::of(Sequence::class),
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                static function(Sequence $lines, Str $line) use ($columns): Sequence {
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                    return ($lines)(
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                        $line->pregSplit('~ +~', $columns->size()),
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                    );
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                },
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            );
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        $volumes = $partsByLine->mapTo(
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            Volume::class,
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            function(Sequence $parts) use ($columns): Volume {
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                return new Volume(
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                    new MountPoint(
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                        $parts->get($columns->indexOf('mountPoint'))->toString(),
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                    ),
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                    Bytes::of(
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                        $parts->get($columns->indexOf('size'))->toString(),
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                    ),
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                    Bytes::of(
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                        $parts->get($columns->indexOf('available'))->toString(),
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                    ),
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                    Bytes::of(
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                        $parts->get($columns->indexOf('used'))->toString(),
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                    ),
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                    new Usage(
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                        (float) $parts->get($columns->indexOf('usage'))->toString(),
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                    ),
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                );
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            },
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        );
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        /** @var Map<string, Volume> */
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        return $volumes->reduce(
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            Map::of('string', Volume::class),
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            static function(Map $volumes, Volume $volume): Map {
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                return ($volumes)(
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                    $volume->mountPoint()->toString(),
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                    $volume,
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                );
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            },
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        );
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    }
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}
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