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synced 2026-03-16 07:15:45 +01:00
d2198dfd01There's more value on showing how `assert()` displays the validation messages than simply showing if `isValid()` returns `true` or `false`. However, that increases the chances of having outdated documentation, so I created a doc linter that updates the Markdown files with the correct message.
361 lines
11 KiB
PHP
361 lines
11 KiB
PHP
<?php
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/*
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* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
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* SPDX-License-Identifier: MIT
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*/
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declare(strict_types=1);
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namespace Respect\Dev\Markdown\Linters;
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use ArrayObject;
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use DateTimeImmutable;
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use PhpParser\Node;
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use PhpParser\Node\Expr\MethodCall;
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use PhpParser\Node\Expr\StaticCall;
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use PhpParser\Node\Identifier;
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use PhpParser\Node\Name;
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use PhpParser\Node\Stmt\Expression;
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use PhpParser\ParserFactory;
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use PhpParser\PrettyPrinter\Standard as PrettyPrinter;
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use Respect\Dev\Markdown\Content;
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use Respect\Dev\Markdown\File;
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use Respect\Dev\Markdown\Linter;
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use Respect\Validation\Exceptions\ValidationException;
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use Throwable;
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use UnexpectedValueException;
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use function array_keys;
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use function array_merge;
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use function array_pop;
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use function array_slice;
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use function array_values;
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use function count;
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use function date;
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use function explode;
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use function implode;
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use function preg_match;
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use function sprintf;
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use function str_contains;
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use function str_ends_with;
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use function str_replace;
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use function str_starts_with;
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use function substr;
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use function substr_count;
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use function trim;
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use const PHP_EOL;
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final readonly class AssertionMessageLinter implements Linter
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{
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private const string FIXED_DATETIME = '2024-01-01 12:00:00+00:00';
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public function lint(File $file): File
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{
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if (!str_contains($file->filename, '/validators/') || !str_ends_with($file->filename, '.md')) {
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return $file;
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}
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$processedContent = $this->processContent($file->content);
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if ($file->content->build() === $processedContent->build()) {
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return $file;
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}
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return $file->withContent($processedContent);
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}
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private function processContent(Content $content): Content
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{
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$context = new ArrayObject();
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$newContent = new Content();
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$inCodeBlock = false;
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$currentCodeBlock = [];
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foreach ($content as $line) {
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if (str_starts_with($line, '```php')) {
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$inCodeBlock = true;
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$currentCodeBlock = [$line];
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continue;
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}
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if ($inCodeBlock && str_starts_with($line, '```')) {
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$currentCodeBlock[] = $line;
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$processedLines = $this->processCodeBlock($currentCodeBlock, $context);
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foreach ($processedLines as $processedLine) {
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$newContent->raw($processedLine);
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}
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$inCodeBlock = false;
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$currentCodeBlock = [];
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continue;
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}
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if ($inCodeBlock) {
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$currentCodeBlock[] = $line;
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continue;
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}
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$newContent->raw($line);
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}
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return $newContent;
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}
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/**
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* @param string[] $lines
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*
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* @return string[]
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*/
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private function processCodeBlock(array $lines, ArrayObject $context): array
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{
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$openingLine = $lines[0];
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$closingLine = $lines[count($lines) - 1];
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$codeLines = array_slice($lines, 1, -1);
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$code = implode("\n", $codeLines);
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$processedCodeLines = $this->processCode($code, $context);
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return [
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$openingLine,
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...$processedCodeLines,
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$closingLine,
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];
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}
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/** @return string[] */
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private function processCode(string $code, ArrayObject $context): array
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{
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$cleanedCode = $this->stripOutputComments($code);
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$parser = (new ParserFactory())->createForNewestSupportedVersion();
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$printer = new PrettyPrinter();
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$phpTagLength = 6;
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$fullCode = '<?php ' . $cleanedCode;
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try {
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$statements = $parser->parse($fullCode);
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} catch (Throwable $exception) {
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throw new UnexpectedValueException(sprintf('Failed to parse code block: %s', $code), 0, $exception);
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}
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$processedLines = [];
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$lastEndPos = $phpTagLength;
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$lastWasAssertion = false;
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foreach ($statements as $statement) {
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$startPos = $statement->getStartFilePos();
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$endPos = $statement->getEndFilePos();
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if ($startPos > $lastEndPos && !$lastWasAssertion) {
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$between = substr($fullCode, $lastEndPos, $startPos - $lastEndPos);
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$newlineCount = substr_count($between, "\n");
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for ($i = 1; $i < $newlineCount; $i++) {
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$processedLines[] = '';
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}
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}
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if ($startPos >= 0 && $endPos >= 0) {
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$statementCode = substr($fullCode, $startPos, $endPos - $startPos + 1);
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$restOfCode = substr($fullCode, $endPos + 1);
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if (preg_match('/^(\h*\/\/[^\n]*)/u', $restOfCode, $matches)) {
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$statementCode .= $matches[1];
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}
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} else {
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$statementCode = $printer->prettyPrint([$statement]);
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}
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$isAssertion = $this->isValidationAssertion($statement);
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if ($isAssertion) {
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$processedLines[] = $statementCode;
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$contextHasClass = $this->contextContainsClass($context);
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$result = $this->executeStatement($statementCode, $context, $printer);
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$processedLines = array_merge($processedLines, $result);
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if ($contextHasClass) {
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$context->exchangeArray([]);
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}
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} else {
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$context->append($printer->prettyPrint([$statement]));
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$processedLines[] = $statementCode;
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}
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$lastEndPos = $endPos + 1;
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$lastWasAssertion = $isAssertion;
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}
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while (count($processedLines) > 0 && trim($processedLines[count($processedLines) - 1]) === '') {
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array_pop($processedLines);
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}
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return $processedLines;
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}
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private function stripOutputComments(string $code): string
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{
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$lines = explode("\n", $code);
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$filteredLines = [];
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foreach ($lines as $line) {
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$trimmed = trim($line);
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if ($trimmed === '// Validation passes successfully') {
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continue;
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}
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if (str_starts_with($trimmed, '// →')) {
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continue;
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}
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$filteredLines[] = $line;
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}
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$result = [];
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$lastWasEmpty = false;
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foreach ($filteredLines as $line) {
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$isEmpty = trim($line) === '';
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if ($isEmpty && $lastWasEmpty) {
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continue;
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}
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$result[] = $line;
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$lastWasEmpty = $isEmpty;
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}
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while (count($result) > 0 && trim($result[count($result) - 1]) === '') {
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array_pop($result);
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}
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return implode("\n", $result);
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}
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private function isValidationAssertion(Node $statement): bool
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{
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if (!$statement instanceof Expression) {
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return false;
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}
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$expr = $statement->expr;
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if (!$expr instanceof MethodCall) {
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return false;
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}
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$methodName = $expr->name;
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if (!$methodName instanceof Identifier) {
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return false;
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}
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if ($methodName->name !== 'assert') {
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return false;
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}
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return $this->originatesFromV($expr) || $this->originatesFromVariable($expr);
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}
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private function originatesFromV(Node $node): bool
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{
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if ($node instanceof StaticCall) {
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$class = $node->class;
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return $class instanceof Name && $class->toString() === 'v';
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}
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if ($node instanceof MethodCall) {
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return $this->originatesFromV($node->var);
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}
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return false;
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}
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private function originatesFromVariable(Node $node): bool
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{
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if ($node instanceof Node\Expr\Variable) {
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return true;
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}
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if ($node instanceof MethodCall) {
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return $this->originatesFromVariable($node->var);
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}
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return false;
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}
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private function contextContainsClass(ArrayObject $context): bool
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{
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$fullContext = implode("\n", $context->getArrayCopy());
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return (bool) preg_match('/^(final\s+)?class\s+[A-Za-z_][A-Za-z0-9_]*/m', $fullContext);
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}
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/** @return string[] */
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private function executeStatement(string $statementCode, ArrayObject $context, PrettyPrinter $printer): array
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{
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$fullCode = implode("\n", [...$context->getArrayCopy(), $statementCode]);
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$fullCode = $this->replacePlaceholders($fullCode);
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$resultLines = [];
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try {
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eval($fullCode);
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if (str_contains($statementCode, 'assert(')) {
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$resultLines[] = '// Validation passes successfully';
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}
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} catch (ValidationException $e) {
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$fullMessage = $e->getFullMessage();
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if (str_contains($fullMessage, PHP_EOL)) {
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foreach (explode(PHP_EOL, trim($fullMessage)) as $line) {
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$resultLines[] = '// → ' . $this->formatExceptionMessage($line);
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}
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} else {
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$resultLines[] = '// → ' . $this->formatExceptionMessage($e->getMessage());
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}
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} catch (Throwable $e) {
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$resultLines[] = '// 𝙭 ' . $this->formatExceptionMessage($e->getMessage());
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}
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if (count($resultLines) > 0) {
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$resultLines[] = '';
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}
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return $resultLines;
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}
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private function replacePlaceholders(string $code): string
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{
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return str_replace(array_keys($this->getReplacements()), array_values($this->getReplacements()), $code);
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}
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private function formatExceptionMessage(string $line): string
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{
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return str_replace(array_values($this->getReplacements()), array_keys($this->getReplacements()), $line);
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}
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/** @return array<string, string> */
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private function getReplacements(): array
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{
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$dateTime = new DateTimeImmutable(self::FIXED_DATETIME);
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return [
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'/path/to/file.txt' => 'tests/fixtures/file.txt',
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'/path/to/file' => 'tests/fixtures/file',
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'/path/to/symbolic-link' => 'tests/fixtures/symbolic-link',
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'/path/to/executable' => 'tests/fixtures/executable',
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'/path/to/image.gif' => 'tests/fixtures/valid-image.gif',
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'/path/to/image.png' => 'tests/fixtures/valid-image.png',
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'/path/to/image.jpg' => 'tests/fixtures/valid-image.jpg',
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'/path/to/dir' => 'tests/fixtures',
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'__FILE__' => '"tests/fixtures/file"',
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'__DIR__' => '"tests/fixtures"',
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'new DateTime()' => 'new DateTime(\'' . self::FIXED_DATETIME . '\')',
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'new DateTimeImmutable()' => 'new DateTimeImmutable(\'' . self::FIXED_DATETIME . '\')',
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date('d/m/Y') => $dateTime->format('d/m/Y'),
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$dateTime->format('d/m/Y') => date('d/m/Y'),
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'new ClassWithToString()' => 'new \Respect\Validation\Test\Stubs\ToStringStub("string")',
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];
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}
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}
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