Subversion-Projekte lars-tiefland.laravel_shop

<?php

namespace Spatie\LaravelIgnition\Views;

use Illuminate\View\Compilers\BladeCompiler;

use Throwable;

class BladeSourceMapCompiler

{

    protected BladeCompiler $bladeCompiler;

    public function __construct()

    {

        $this->bladeCompiler = app('blade.compiler');

    }

    public function detectLineNumber(string $filename, int $compiledLineNumber): int

    {

        $map = $this->compileSourcemap((string)file_get_contents($filename));

        return $this->findClosestLineNumberMapping($map, $compiledLineNumber);

    }

    protected function compileSourcemap(string $value): string

    {

        try {

            $value = $this->addEchoLineNumbers($value);

            $value = $this->addStatementLineNumbers($value);

            $value = $this->addBladeComponentLineNumbers($value);

            $value = $this->bladeCompiler->compileString($value);

            return $this->trimEmptyLines($value);

        } catch (Throwable $e) {

            report($e);

            return $value;

        }

    }

    protected function addEchoLineNumbers(string $value): string

    {

        $echoPairs = [['{{', '}}'], ['{{{', '}}}'], ['{!!', '!!}']];

        foreach ($echoPairs as $pair) {

            // Matches {{ $value }}, {!! $value !!} and  {{{ $value }}} depending on $pair

            $pattern = sprintf('/(@)?%s\s*(.+?)\s*%s(\r?\n)?/s', $pair[0], $pair[1]);

            if (preg_match_all($pattern, $value, $matches, PREG_OFFSET_CAPTURE)) {

                foreach (array_reverse($matches[0]) as $match) {

                    $position = mb_strlen(substr($value, 0, $match[1]));

                    $value = $this->insertLineNumberAtPosition($position, $value);

                }

            }

        }

        return $value;

    }

    protected function addStatementLineNumbers(string $value): string

    {

        // Matches @bladeStatements() like @if, @component(...), @etc;

        $shouldInsertLineNumbers = preg_match_all(

            '/\B@(@?\w+(?:::\w+)?)([ \t]*)(\( ( (?>[^()]+) | (?3) )* \))?/x',

            $value,

            $matches,

            PREG_OFFSET_CAPTURE

        );

        if ($shouldInsertLineNumbers) {

            foreach (array_reverse($matches[0]) as $match) {

                $position = mb_strlen(substr($value, 0, $match[1]));

                $value = $this->insertLineNumberAtPosition($position, $value);

            }

        }

        return $value;

    }

    protected function addBladeComponentLineNumbers(string $value): string

    {

        // Matches the start of `<x-blade-component`

        $shouldInsertLineNumbers = preg_match_all(

            '/<\s*x[-:]([\w\-:.]*)/mx',

            $value,

            $matches,

            PREG_OFFSET_CAPTURE

        );

        if ($shouldInsertLineNumbers) {

            foreach (array_reverse($matches[0]) as $match) {

                $position = mb_strlen(substr($value, 0, $match[1]));

                $value = $this->insertLineNumberAtPosition($position, $value);

            }

        }

        return $value;

    }

    protected function insertLineNumberAtPosition(int $position, string $value): string

    {

        $before = mb_substr($value, 0, $position);

        $lineNumber = count(explode("\n", $before));

        return mb_substr($value, 0, $position)."|---LINE:{$lineNumber}---|".mb_substr($value, $position);

    }

    protected function trimEmptyLines(string $value): string

    {

        $value = preg_replace('/^\|---LINE:([0-9]+)---\|$/m', '', $value);

        return ltrim((string)$value, PHP_EOL);

    }

    protected function findClosestLineNumberMapping(string $map, int $compiledLineNumber): int

    {

        $map = explode("\n", $map);

        // Max 20 lines between compiled and source line number.

        // Blade components can span multiple lines and the compiled line number is often

        // a couple lines below the source-mapped `<x-component>` code.

        $maxDistance = 20;

        $pattern = '/\|---LINE:(?P<line>[0-9]+)---\|/m';

        $lineNumberToCheck = $compiledLineNumber - 1;

        while (true) {

            if ($lineNumberToCheck < $compiledLineNumber - $maxDistance) {

                // Something wrong. Return the $compiledLineNumber (unless it's out of range)

                return min($compiledLineNumber, count($map));

            }

            if (preg_match($pattern, $map[$lineNumberToCheck] ?? '', $matches)) {

                return (int)$matches['line'];

            }

            $lineNumberToCheck--;

        }

    }

}