graze /
data-flow
| @@ 25-54 (lines=30) @@ | ||
| 22 | /** |
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| 23 | * Return the first element in a NodeCollection based on an option callback |
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| 24 | */ |
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| 25 | class First extends AbstractFlow |
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| 26 | { |
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| 27 | /** |
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| 28 | * @var callable|null |
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| 29 | */ |
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| 30 | private $callback; |
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| 31 | ||
| 32 | /** |
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| 33 | * First constructor. |
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| 34 | * |
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| 35 | * @param callable $callback |
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| 36 | */ |
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| 37 | public function __construct(callable $callback = null) |
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| 38 | { |
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| 39 | $this->callback = $callback; |
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| 40 | } |
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| 41 | ||
| 42 | /** |
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| 43 | * @inheritDoc |
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| 44 | */ |
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| 45 | public function flow(NodeInterface $node) |
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| 46 | { |
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| 47 | if (!($node instanceof NodeCollectionInterface)) { |
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| 48 | throw new InvalidArgumentException("The supplied $node is not a NodeCollectionInterface"); |
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| 49 | } |
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| 50 | $this->log(LogLevel::DEBUG, "Selecting the first entry from {node}", ['node' => $node]); |
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| 51 | ||
| 52 | return $node->first($this->callback); |
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| 53 | } |
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| 54 | } |
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| 55 | ||
| @@ 25-54 (lines=30) @@ | ||
| 22 | /** |
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| 23 | * Return the last element in a NodeCollection based on an option callback |
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| 24 | */ |
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| 25 | class Last extends AbstractFlow |
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| 26 | { |
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| 27 | /** |
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| 28 | * @var callable|null |
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| 29 | */ |
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| 30 | private $callback; |
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| 31 | ||
| 32 | /** |
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| 33 | * First constructor. |
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| 34 | * |
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| 35 | * @param callable $callback |
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| 36 | */ |
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| 37 | public function __construct(callable $callback = null) |
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| 38 | { |
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| 39 | $this->callback = $callback; |
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| 40 | } |
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| 41 | ||
| 42 | /** |
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| 43 | * @inheritDoc |
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| 44 | */ |
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| 45 | public function flow(NodeInterface $node) |
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| 46 | { |
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| 47 | if (!($node instanceof NodeCollectionInterface)) { |
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| 48 | throw new InvalidArgumentException("The supplied $node is not a NodeCollectionInterface"); |
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| 49 | } |
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| 50 | $this->log(LogLevel::DEBUG, "Selecting the last entry from {node}", ['node' => $node]); |
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| 51 | ||
| 52 | return $node->last($this->callback); |
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| 53 | } |
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| 54 | } |
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| 55 | ||
