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File Content: `MakeViewVariableOptionalSolution.php`

<?php

namespace Spatie\ErrorSolutions\Solutions\Laravel;

use Illuminate\Support\Facades\Blade;
use Illuminate\Support\Str;
use Spatie\ErrorSolutions\Contracts\RunnableSolution;
use Spatie\ErrorSolutions\Solutions\Concerns\IsProvidedByFlare;

class MakeViewVariableOptionalSolution implements RunnableSolution
{
    use IsProvidedByFlare;

    protected ?string $variableName;

    protected ?string $viewFile;

    public function __construct(?string $variableName = null, ?string $viewFile = null)
    {
        $this->variableName = $variableName;

        $this->viewFile = $viewFile;
    }

    public function getSolutionTitle(): string
    {
        return "$$this->variableName is undefined";
    }

    public function getDocumentationLinks(): array
    {
        return [];
    }

    public function getSolutionActionDescription(): string
    {
        $output = [
            'Make the variable optional in the blade template.',
            "Replace `{{ $$this->variableName }}` with `{{ $$this->variableName ?? '' }}`",
        ];

        return implode(PHP_EOL, $output);
    }

    public function getRunButtonText(): string
    {
        return 'Make variable optional';
    }

    public function getSolutionDescription(): string
    {
        return $this->getSolutionActionDescription();
    }

    public function getRunParameters(): array
    {
        return [
            'variableName' => $this->variableName,
            'viewFile' => $this->viewFile,
        ];
    }

    /**
     * @param array<string, mixed>  $parameters
     *
     * @return bool
     */
    public function isRunnable(array $parameters = []): bool
    {
        return $this->makeOptional($this->getRunParameters()) !== false;
    }

    /**
     * @param array<string, string> $parameters
     *
     * @return void
     */
    public function run(array $parameters = []): void
    {
        $output = $this->makeOptional($parameters);
        if ($output !== false) {
            file_put_contents($parameters['viewFile'], $output);
        }
    }

    protected function isSafePath(string $path): bool
    {
        if (! Str::startsWith($path, ['/', './'])) {
            return false;
        }
        if (! Str::endsWith($path, '.blade.php')) {
            return false;
        }

        return true;
    }

    /**
     * @param array<string, string> $parameters
     *
     * @return bool|string
     */
    public function makeOptional(array $parameters = []): bool|string
    {
        if (! $this->isSafePath($parameters['viewFile'])) {
            return false;
        }

        $originalContents = (string)file_get_contents($parameters['viewFile']);
        $newContents = str_replace('$'.$parameters['variableName'], '$'.$parameters['variableName']." ?? ''", $originalContents);

        $originalTokens = token_get_all(Blade::compileString($originalContents));
        $newTokens = token_get_all(Blade::compileString($newContents));

        $expectedTokens = $this->generateExpectedTokens($originalTokens, $parameters['variableName']);

        if ($expectedTokens !== $newTokens) {
            return false;
        }

        return $newContents;
    }

    /**
     * @param array<int, mixed> $originalTokens
     * @param string $variableName
     *
     * @return array<int, mixed>
     */
    protected function generateExpectedTokens(array $originalTokens, string $variableName): array
    {
        $expectedTokens = [];
        foreach ($originalTokens as $token) {
            $expectedTokens[] = $token;
            if ($token[0] === T_VARIABLE && $token[1] === '$'.$variableName) {
                $expectedTokens[] = [T_WHITESPACE, ' ', $token[2]];
                $expectedTokens[] = [T_COALESCE, '??', $token[2]];
                $expectedTokens[] = [T_WHITESPACE, ' ', $token[2]];
                $expectedTokens[] = [T_CONSTANT_ENCAPSED_STRING, "''", $token[2]];
            }
        }

        return $expectedTokens;
    }
}

Name	Size	Permission
GenerateAppKeySolution.php	1164 bytes	0755
LivewireDiscoverSolution.php	1364 bytes	0755
MakeViewVariableOptionalSolution.php	3968 bytes	0755
RunMigrationsSolution.php	1326 bytes	0755
SuggestLivewireMethodNameSolution.php	865 bytes	0755
SuggestLivewirePropertyNameSolution.php	818 bytes	0755
SuggestUsingCorrectDbNameSolution.php	921 bytes	0755
SuggestUsingMariadbDatabaseSolution.php	944 bytes	0755
SuggestUsingMysql8DatabaseSolution.php	955 bytes	0755
UseDefaultValetDbCredentialsSolution.php	1745 bytes	0755

Command Bosku:

File Content: MakeViewVariableOptionalSolution.php

File Content: `MakeViewVariableOptionalSolution.php`