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<?php |
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|
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if (!defined('ABSPATH')) { |
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exit; |
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} |
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|
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/** |
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* Best-effort EXPLAIN collector for Bruno-style admin redirects/captured view |
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* failures. |
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* |
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* This collaborator is intentionally narrow and no-throw: it only probes failed |
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* SELECTs against the redirects table from the Page Redirects / Captured 404s |
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* tabs, never mutates state, and returns a compact error/skipped string when it |
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* cannot safely collect a plan. |
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*/ |
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class ABJ_404_Solution_ViewQueryExplainDiagnostics { |
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|
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/** @var ABJ_404_Solution_DatabaseCore */ |
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private $dbCore; |
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|
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/** @param ABJ_404_Solution_DatabaseCore $dbCore */ |
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public function __construct(ABJ_404_Solution_DatabaseCore $dbCore) { |
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$this->dbCore = $dbCore; |
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} |
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|
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/** |
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* @param string $sub |
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* @param string $failedQuery |
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* @param array<string, mixed> $queryResult |
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* @return array<int, array<string,mixed>>|string |
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*/ |
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public function collect(string $sub, string $failedQuery, array $queryResult) { |
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try { |
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$reason = $this->skipReason($sub, $failedQuery, $queryResult); |
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if ($reason !== '') { |
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return 'skipped: ' . $reason; |
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} |
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|
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$result = $this->dbCore->queryAndGetResults('EXPLAIN ' . $this->stripWrappersForExplain($failedQuery), array( |
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'timeout' => 5, |
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'log_errors' => false, |
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'skip_repair' => true, |
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)); |
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$lastErrorRaw = $result['last_error'] ?? ''; |
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$err = is_string($lastErrorRaw) ? $lastErrorRaw : ''; |
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if ($err !== '' || !empty($result['timed_out'])) { |
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return 'error: ' . ($err !== '' ? $err : 'timed out'); |
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} |
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return $this->compactExplainRows(is_array($result['rows'] ?? null) ? $result['rows'] : array()); |
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} catch (Throwable $e) { |
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return 'error: ' . $e->getMessage(); |
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} |
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} |
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|
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/** |
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* @param string $sub |
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* @param string $failedQuery |
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* @param array<string, mixed> $queryResult |
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* @return string Empty when the EXPLAIN probe is allowed. |
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*/ |
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private function skipReason(string $sub, string $failedQuery, array $queryResult): string { |
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$normalizedSub = strtolower($sub); |
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if ($normalizedSub !== 'abj404_redirects' && $normalizedSub !== 'abj404_captured') { |
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return 'not a redirects/captured admin view'; |
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} |
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if ($failedQuery === '') { |
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return 'no query supplied'; |
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} |
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$lastError = is_string($queryResult['last_error'] ?? null) ? trim($queryResult['last_error']) : ''; |
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if ($lastError === '' && empty($queryResult['timed_out'])) { |
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return 'query did not fail or time out'; |
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} |
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|
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$stripped = $this->stripWrappersForExplain($failedQuery); |
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if (!preg_match('/^\\s*select\\b/i', $stripped)) { |
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return 'not a SELECT query'; |
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} |
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if (stripos($stripped, 'abj404_redirects') === false) { |
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return 'not a redirects-table query'; |
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} |
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return ''; |
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} |
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|
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/** |
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* @param string $query |
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* @return string |
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*/ |
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private function stripWrappersForExplain(string $query): string { |
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$q = trim($query); |
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$q = preg_replace('/^\\s*\\/\\*\\+[^*]*\\*\\/\\s*/', '', $q) ?? $q; |
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$q = preg_replace('/^\\s*SET\\s+STATEMENT\\s+max_statement_time\\s*=\\s*\\d+\\s+FOR\\s+/i', '', $q) ?? $q; |
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return $q; |
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} |
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|
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/** |
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* Keep only the planner fields useful for support and cap row/string sizes |
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* so diagnostics cannot balloon a support payload. |
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* |
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* @param array<int, mixed> $rows |
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* @return array<int, array<string,mixed>> |
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*/ |
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private function compactExplainRows(array $rows): array { |
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$allowed = array( |
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'id' => true, |
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'select_type' => true, |
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'table' => true, |
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'type' => true, |
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'possible_keys' => true, |
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'key' => true, |
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'key_len' => true, |
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'ref' => true, |
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'rows' => true, |
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'filtered' => true, |
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'extra' => true, |
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); |
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$clean = array(); |
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foreach ($rows as $row) { |
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if (count($clean) >= 10) { |
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break; |
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} |
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if (is_object($row)) { |
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$row = (array)$row; |
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} |
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if (!is_array($row)) { |
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continue; |
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} |
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$out = array(); |
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foreach ($row as $key => $value) { |
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$lower = strtolower((string)$key); |
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if (!isset($allowed[$lower])) { |
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continue; |
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} |
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$out[$key] = $this->boundedScalar($value); |
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} |
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if (!empty($out)) { |
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$clean[] = $out; |
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} |
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} |
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return $clean; |
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} |
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|
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/** |
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* @param mixed $value |
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* @return mixed |
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*/ |
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private function boundedScalar($value) { |
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if ($value === null || is_bool($value) || is_int($value) || is_float($value)) { |
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return $value; |
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} |
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if (!is_scalar($value)) { |
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return ''; |
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} |
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$text = (string)$value; |
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return strlen($text) > 500 ? substr($text, 0, 500) : $text; |
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} |
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} |
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|
