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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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* Selects bounded malformed fixed-sink lines for support evidence. |
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* |
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* Corrupt records cannot participate in request ranking because they have no |
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* readable request identity. They still prove that the durable sink was |
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* reached, so a small newest-first reserve keeps them without letting one |
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* unbounded line consume the support payload. |
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*/ |
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final class ABJ_404_Solution_MalformedCheckpointEvidence { |
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|
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/** Keep the newest bounded corruption samples outside ordinary ranking. */ |
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private const MAX_RESERVED_LINES = 4; |
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|
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/** A corrupt line must never consume the bounded support payload by itself. */ |
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private const MAX_RESERVED_LINE_BYTES = 1024; |
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|
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private const TRUNCATION_SUFFIX = '...[malformed line truncated]'; |
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|
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/** |
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* @param array<int, string> $lines JSONL lines, oldest first. |
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* @return array<int, string> |
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*/ |
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public static function select(array $lines): array { |
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$selected = array(); |
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foreach ($lines as $line) { |
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if (is_array(json_decode($line, true))) { |
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continue; |
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} |
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if (strlen($line) > self::MAX_RESERVED_LINE_BYTES) { |
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$prefixBytes = self::MAX_RESERVED_LINE_BYTES |
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- strlen(self::TRUNCATION_SUFFIX); |
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$line = substr($line, 0, max(0, $prefixBytes)) |
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. self::TRUNCATION_SUFFIX; |
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} |
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$selected[] = $line; |
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if (count($selected) > self::MAX_RESERVED_LINES) { |
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array_shift($selected); |
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} |
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} |
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return $selected; |
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} |
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} |
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|
