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<?php |
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declare(strict_types=1); |
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namespace Spiral\Stempler\Transform\Merge\Inject; |
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/** |
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* PHPMixin provides the ability to safely inject nodes into PHP source code using given macro function. |
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*/ |
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final class PHPMixin |
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{ |
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private array $blocks = []; |
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public function __construct( |
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private readonly array $tokens, |
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string $func |
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) { |
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$this->parse($func); |
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} |
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public function compile(): string |
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{ |
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$replace = []; |
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foreach ($this->blocks as $block) { |
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for ($i = $block['start']; $i <= $block['end']; $i++) { |
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$replace[$i] = ''; |
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} |
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$replace[$block['start']] = $block['value']; |
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} |
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$result = ''; |
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foreach ($this->tokens as $position => $token) { |
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if (\array_key_exists($position, $replace)) { |
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$result .= $replace[$position]; |
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continue; |
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} |
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if (\is_string($token)) { |
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$result .= $token; |
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continue; |
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} |
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$result .= $token[1]; |
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} |
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return $result; |
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} |
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/** |
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* Compiles the PHP blocks (with replacements) but excludes the php open, close tag and echo function. |
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*/ |
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public function trimBody(): string |
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{ |
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$replace = []; |
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foreach ($this->blocks as $block) { |
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for ($i = $block['start']; $i <= $block['end']; ++$i) { |
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$replace[$i] = ''; |
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} |
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$replace[$block['start']] = $block['value']; |
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} |
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$result = ''; |
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foreach ($this->tokens as $position => $token) { |
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if (\array_key_exists($position, $replace)) { |
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$result .= $replace[$position]; |
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continue; |
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} |
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if (\is_string($token)) { |
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$result .= $token; |
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continue; |
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} |
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if (\in_array($token[0], [T_OPEN_TAG, T_OPEN_TAG_WITH_ECHO, T_CLOSE_TAG, T_ECHO])) { |
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continue; |
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} |
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$result .= $token[1]; |
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} |
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return \rtrim(\trim($result), ';'); |
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} |
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/** |
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* Get macros detected in PHP code and their default values (if any). |
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*/ |
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public function getBlocks(): array |
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{ |
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$result = []; |
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foreach ($this->blocks as $name => $macro) { |
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$result[$name] = $macro['value']; |
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} |
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return $result; |
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} |
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public function has(string $block): bool |
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{ |
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return isset($this->blocks[$block]); |
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} |
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public function set(string $block, string $value): void |
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{ |
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if (!isset($this->blocks[$block])) { |
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return; |
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} |
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$this->blocks[$block]['value'] = $value; |
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} |
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private function parse(string $func): void |
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{ |
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$level = 0; |
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$start = $name = $value = null; |
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foreach ($this->tokens as $position => $token) { |
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if (!\is_array($token)) { |
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$token = [$token, $token, 0]; |
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} |
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switch ($token[0]) { |
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case '(': |
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if ($start !== null) { |
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$level++; |
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$value .= $token[1]; |
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} |
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break; |
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case ')': |
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if ($start === null) { |
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break; |
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} |
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$level--; |
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$value .= $token[1]; |
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if ($level === 0) { |
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$this->blocks[$name] = [ |
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'start' => $start, |
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'value' => trim($value), |
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'end' => $position, |
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]; |
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// reset |
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$start = $name = $value = null; |
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} |
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break; |
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case T_STRING: |
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if ($token[1] === $func) { |
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$start = $position; |
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$value = $token[1]; |
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break; |
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} |
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if ($start !== null) { |
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$value .= $token[1]; |
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} |
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break; |
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case T_CONSTANT_ENCAPSED_STRING: |
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if ($start === null) { |
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break; |
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} |
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if ($name === null) { |
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$name = \stripcslashes(\substr($token[1], 1, -1)); |
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} |
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$value .= $token[1]; |
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break; |
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case ',': |
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$value .= $token[1]; |
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break; |
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default: |
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if ($start !== null) { |
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$value .= $token[1]; |
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} |
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} |
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} |
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} |
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} |
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spiral /
framework
