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Add BlockReplacer helper utility
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5 files changed

+158
-2
lines changed

5 files changed

+158
-2
lines changed

‎src/BlockReplacer.php‎

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<?php
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namespace Recoded\WordPressBlockParser;
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use Recoded\WordPressBlockParser\Blocks\AbstractBlock;
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use Stringable;
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final class BlockReplacer implements Stringable
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{
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private string $replacedContent;
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private int $offsetDifference = 0;
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/**
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* Create a new BlockReplacer instance.
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*
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* @param string $content
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* @return void
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*/
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public function __construct(
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public readonly string $content,
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) {
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$this->replacedContent = $content;
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}
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/**
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* Create a new replacer from content string.
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*
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* @param string $content
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* @return self
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*/
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public static function create(string $content): self
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{
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return new self($content);
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}
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/**
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* Replace the given block in the content.
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*
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* @param \Recoded\WordPressBlockParser\Blocks\AbstractBlock $block
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* @param string $replacement
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* @return $this
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*/
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public function replace(AbstractBlock $block, string $replacement): self
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{
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$from = $block->getStart() + $this->offsetDifference;
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$to = $block->getEnd() + $this->offsetDifference;
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$this->replacedContent = substr($this->replacedContent, 0, $from)
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. $replacement
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. substr($this->replacedContent, $to);
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$this->offsetDifference += strlen($replacement) - ($to - $from);
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return $this;
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}
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/**
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* Get the replaced content.
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*
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* @return string
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*/
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public function __toString(): string
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{
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return $this->replacedContent;
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}
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}

‎src/Blocks/AbstractBlock.php‎

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<?php
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namespace Recoded\WordPressBlockParser\Blocks;
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abstract class AbstractBlock
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{
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/**
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* Get the offset on which the block starts.
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*
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* @return int
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*/
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abstract public function getStart(): int;
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/**
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* Get the offset on which the block ends.
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*
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* @return int
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*/
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abstract public function getEnd(): int;
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}

‎src/Blocks/Block.php‎

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use Recoded\WordPressBlockParser\Tokens\BlockClosing;
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use Recoded\WordPressBlockParser\Tokens\BlockOpening;
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final class Block
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final class Block extends AbstractBlock
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{
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/**
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* Create new Block instance.
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) {
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//
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}
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/**
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* Get the offset on which the block starts.
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*
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* @return int
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*/
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public function getStart(): int
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{
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return $this->opening->startsAt;
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}
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/**
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* Get the offset on which the block ends.
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*
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* @return int
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*/
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public function getEnd(): int
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{
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return $this->closing->startsAt + $this->closing->length;
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}
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}

‎src/Blocks/SelfClosingBlock.php‎

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use Recoded\WordPressBlockParser\Tokens\SelfClosingBlock as SelfClosingBlockToken;
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final class SelfClosingBlock
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final class SelfClosingBlock extends AbstractBlock
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{
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/**
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* Create new SelfClosingBlock instance.
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) {
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//
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}
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/**
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* Get the offset on which the block starts.
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*
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* @return int
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*/
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public function getStart(): int
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{
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return $this->token->startsAt;
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}
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/**
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* Get the offset on which the block ends.
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*
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* @return int
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*/
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public function getEnd(): int
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{
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return $this->token->startsAt + $this->token->length;
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}
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}

‎tests/BlockReplacerTest.php‎

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<?php
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namespace Tests;
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use Recoded\WordPressBlockParser\BlockParser;
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use Recoded\WordPressBlockParser\BlockReplacer;
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final class BlockReplacerTest extends TestCase
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{
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public function test_it_replaces_blocks(): void
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{
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$parser = BlockParser::create($content = <<<HTML
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<!-- wp:paragraph -->
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<!-- wp:paragraph -->
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Test
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<!-- /wp:paragraph -->
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<!-- /wp:paragraph -->
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<!-- wp:paragraph /-->
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HTML);
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$blocks = iterator_to_array($parser);
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$replaced = (string) BlockReplacer::create($content)
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->replace($blocks[0], 'foo')
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->replace($blocks[1], 'bar');
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self::assertEquals('foo
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bar', $replaced);
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}
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}

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