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<?php |
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declare(strict_types = 1); |
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namespace Innmind\Immutable\Sequence; |
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use Innmind\Immutable\{ |
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Map, |
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Sequence, |
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Str, |
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Type, |
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ValidateArgument, |
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Exception\OutOfBoundException, |
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Exception\LogicException, |
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Exception\ElementNotFound, |
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Exception\CannotGroupEmptyStructure, |
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}; |
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final class Primitive implements Implementation |
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{ |
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private string $type; |
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private ValidateArgument $validate; |
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private array $values; |
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private ?int $size; |
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public function __construct(string $type, ...$values) |
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{ |
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$this->type = $type; |
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$this->validate = Type::of($type); |
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$this->values = $values; |
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} |
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public function type(): string |
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{ |
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return $this->type; |
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} |
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public function size(): int |
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{ |
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return $this->size ?? $this->size = \count($this->values); |
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} |
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public function count(): int |
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{ |
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return $this->size(); |
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} |
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public function toArray(): array |
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{ |
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return $this->values; |
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} |
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public function get(int $index) |
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{ |
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if (!$this->has($index)) { |
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throw new OutOfBoundException; |
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} |
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return $this->values[$index]; |
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} |
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public function diff(Implementation $sequence): self |
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{ |
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return $this->filter(static function($value) use ($sequence): bool { |
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return !$sequence->contains($value); |
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}); |
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} |
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public function distinct(): self |
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{ |
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return $this->reduce( |
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$this->clear(), |
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static function(self $values, $value): self { |
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if ($values->contains($value)) { |
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return $values; |
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} |
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return $values->add($value); |
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} |
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); |
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} |
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public function drop(int $size): self |
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{ |
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$self = $this->clear(); |
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$self->values = \array_slice($this->values, $size); |
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return $self; |
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} |
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public function dropEnd(int $size): self |
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{ |
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$self = $this->clear(); |
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$self->values = \array_slice($this->values, 0, $this->size() - $size); |
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return $self; |
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} |
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public function equals(Implementation $sequence): bool |
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{ |
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return $this->values === $sequence->toArray(); |
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} |
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public function filter(callable $predicate): self |
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{ |
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$self = $this->clear(); |
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$self->values = \array_values(\array_filter( |
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$this->values, |
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$predicate |
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)); |
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return $self; |
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} |
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public function foreach(callable $function): void |
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{ |
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foreach ($this->values as $value) { |
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$function($value); |
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} |
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} |
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public function groupBy(callable $discriminator): Map |
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{ |
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if ($this->size() === 0) { |
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throw new CannotGroupEmptyStructure; |
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} |
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$map = null; |
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foreach ($this->values as $value) { |
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$key = $discriminator($value); |
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if ($map === null) { |
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$map = Map::of( |
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Type::determine($key), |
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Sequence::class |
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); |
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} |
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if ($map->contains($key)) { |
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$map = $map->put( |
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$key, |
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$map->get($key)->add($value) |
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); |
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} else { |
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$map = $map->put($key, Sequence::of($this->type, $value)); |
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} |
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} |
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return $map; |
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} |
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public function first() |
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{ |
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if ($this->size() === 0) { |
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throw new OutOfBoundException; |
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} |
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return $this->values[0]; |
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} |
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public function last() |
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{ |
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if ($this->size() === 0) { |
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throw new OutOfBoundException; |
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} |
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return $this->values[$this->size() - 1]; |
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} |
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public function contains($element): bool |
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{ |
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return \in_array($element, $this->values, true); |
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} |
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public function indexOf($element): int |
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{ |
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$index = \array_search($element, $this->values, true); |
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if ($index === false) { |
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throw new ElementNotFound($element); |
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} |
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return $index; |
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} |
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public function indices(): self |
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{ |
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if ($this->size() === 0) { |
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return new self('int'); |
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} |
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return new self('int', ...\range(0, $this->size() - 1)); |
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} |
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public function map(callable $function): self |
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{ |
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$function = function($value) use ($function) { |
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$value = $function($value); |
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($this->validate)($value, 1); |
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return $value; |
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}; |
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$self = clone $this; |
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$self->values = \array_map($function, $this->values); |
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return $self; |
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} |
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public function pad(int $size, $element): self |
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{ |
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$self = $this->clear(); |
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$self->values = \array_pad($this->values, $size, $element); |
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return $self; |
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} |
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public function partition(callable $predicate): Map |
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{ |
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$truthy = []; |
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$falsy = []; |
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foreach ($this->values as $value) { |
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if ($predicate($value) === true) { |
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$truthy[] = $value; |
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} else { |
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$falsy[] = $value; |
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} |
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} |
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$true = Sequence::of($this->type, ...$truthy); |
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$false = Sequence::of($this->type, ...$falsy); |
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return Map::of('bool', Sequence::class) |
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(true, $true) |
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(false, $false); |
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} |
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public function slice(int $from, int $until): self |
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{ |
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$self = $this->clear(); |
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$self->values = \array_slice( |
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$this->values, |
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$from, |
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$until - $from, |
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); |
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return $self; |
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} |
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public function splitAt(int $index): Sequence |
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{ |
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return Sequence::of(Sequence::class) |
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->add(Sequence::of($this->type, ...$this->slice(0, $index)->toArray())) |
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->add(Sequence::of($this->type, ...$this->slice($index, $this->size())->toArray())); |
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} |
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public function take(int $size): self |
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{ |
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return $this->slice(0, $size); |
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} |
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public function takeEnd(int $size): self |
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{ |
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return $this->slice($this->size() - $size, $this->size()); |
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} |
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public function append(Implementation $sequence): self |
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{ |
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$self = $this->clear(); |
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$self->values = \array_merge($this->values, $sequence->toArray()); |
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return $self; |
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} |
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public function intersect(Implementation $sequence): self |
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{ |
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return $this->filter(static function($value) use ($sequence): bool { |
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return $sequence->contains($value); |
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}); |
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} |
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public function join(string $separator): Str |
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{ |
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return Str::of(\implode($separator, $this->values)); |
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} |
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public function add($element): self |
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{ |
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$self = clone $this; |
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$self->values[] = $element; |
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$self->size = $this->size() + 1; |
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return $self; |
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} |
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public function sort(callable $function): self |
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{ |
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$self = clone $this; |
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\usort($self->values, $function); |
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return $self; |
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} |
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public function reduce($carry, callable $reducer) |
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{ |
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return \array_reduce($this->values, $reducer, $carry); |
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} |
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public function clear(): Implementation |
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{ |
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return new self($this->type); |
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} |
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public function reverse(): self |
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{ |
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$self = clone $this; |
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$self->values = \array_reverse($this->values); |
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return $self; |
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} |
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public function empty(): bool |
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{ |
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return !$this->has(0); |
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} |
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private function has(int $index): bool |
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{ |
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return \array_key_exists($index, $this->values); |
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} |
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} |
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