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✏️ Editing: LogIndex.php

<?php

namespace Opcodes\LogViewer;

use Carbon\CarbonInterface;
use Illuminate\Support\Collection;
use Opcodes\LogViewer\Utils\Utils;

class LogIndex
{
    use Concerns\LogIndex\CanCacheIndex;
    use Concerns\LogIndex\CanFilterIndex;
    use Concerns\LogIndex\CanIterateIndex;
    use Concerns\LogIndex\CanSplitIndexIntoChunks;
    use Concerns\LogIndex\HasMetadata;
    use Concerns\LogIndex\PreservesIndexingProgress;

const DEFAULT_CHUNK_SIZE = 50_000;

public string $identifier;
    protected int $nextLogIndexToCreate;
    protected int $lastScannedFilePosition;
    protected int $lastScannedIndex;

public function __construct(
        public LogFile $file,
        protected ?string $query = null
    ) {
        $this->identifier = Utils::shortMd5($this->query ?? '');
        $this->loadMetadata();
    }

public function addToIndex(int $filePosition, int|CarbonInterface $timestamp, string $severity, ?int $index = null): int
    {
        $logIndex = $index ?? $this->nextLogIndexToCreate ?? 0;

if ($timestamp instanceof CarbonInterface) {
            $timestamp = $timestamp->timestamp;
        }

$this->getCurrentChunk()->addToIndex($logIndex, $filePosition, $timestamp, $severity);

$this->nextLogIndexToCreate = $logIndex + 1;

if ($this->getCurrentChunk()->size >= $this->getMaxChunkSize()) {
            $this->rotateCurrentChunk();
        }

return $logIndex;
    }

public function getPositionForIndex(int $indexToFind): ?int
    {
        $itemsSkipped = 0;

foreach ($this->getChunkDefinitions() as $chunkDefinition) {
            if (($itemsSkipped + $chunkDefinition['size']) <= $indexToFind) {
                // not in this index, let's move on
                $itemsSkipped += $chunkDefinition['size'];

continue;
            }

foreach ($this->getChunkData($chunkDefinition['index']) as $timestamp => $tsIndex) {
                foreach ($tsIndex as $level => $levelIndex) {
                    foreach ($levelIndex as $index => $position) {
                        if ($index === $indexToFind) {
                            return $position;
                        }
                    }
                }
            }
        }

return null;
    }

public function get(?int $limit = null): array
    {
        $results = [];
        $itemsAdded = 0;
        $limit = $limit ?? $this->limit;
        $skip = $this->skip;
        $chunkDefinitions = $this->getChunkDefinitions();

$this->sortKeys($chunkDefinitions);

foreach ($chunkDefinitions as $chunkDefinition) {
            if (isset($skip)) {
                $relevantItemsInChunk = $this->getRelevantItemsInChunk($chunkDefinition);

if ($relevantItemsInChunk <= $skip) {
                    $skip -= $relevantItemsInChunk;

continue;
                }
            }

$chunk = $this->getChunkData($chunkDefinition['index']);

if (empty($chunk)) {
                continue;
            }

$this->sortKeys($chunk);

foreach ($chunk as $timestamp => $tsIndex) {
                if (isset($this->filterFrom) && $timestamp < $this->filterFrom) {
                    continue;
                }
                if (isset($this->filterTo) && $timestamp > $this->filterTo) {
                    continue;
                }

// Timestamp is valid, let's start adding
                if (! isset($results[$timestamp])) {
                    $results[$timestamp] = [];
                }

foreach ($tsIndex as $level => $levelIndex) {
                    if (! $this->isLevelSelected($level)) {
                        continue;
                    }

// severity is valid, let's start adding
                    if (! isset($results[$timestamp][$level])) {
                        $results[$timestamp][$level] = [];
                    }

$this->sortKeys($levelIndex);

foreach ($levelIndex as $idx => $position) {
                        if ($skip > 0) {
                            $skip--;

continue;
                        }

$results[$timestamp][$level][$idx] = $position;

if (isset($limit) && ++$itemsAdded >= $limit) {
                            break 4;
                        }
                    }

if (empty($results[$timestamp][$level])) {
                        unset($results[$timestamp][$level]);
                    }
                }

if (empty($results[$timestamp])) {
                    unset($results[$timestamp]);
                }
            }
        }

return $results;
    }

public function getFlatIndex(?int $limit = null): array
    {
        $results = [];
        $itemsAdded = 0;
        $limit = $limit ?? $this->limit;
        $skip = $this->skip;
        $chunkDefinitions = $this->getChunkDefinitions();

$this->sortKeys($chunkDefinitions);

foreach ($chunkDefinitions as $chunkDefinition) {
            if (isset($skip)) {
                $relevantItemsInChunk = $this->getRelevantItemsInChunk($chunkDefinition);

if ($relevantItemsInChunk <= $skip) {
                    $skip -= $relevantItemsInChunk;

continue;
                }
            }

$chunk = $this->getChunkData($chunkDefinition['index']);

if (is_null($chunk)) {
                continue;
            }

$this->sortKeys($chunk);

$itemsWithinThisTimestamp = [];

foreach ($tsIndex as $level => $levelIndex) {
                    if (! $this->isLevelSelected($level)) {
                        continue;
                    }

foreach ($levelIndex as $idx => $filePosition) {
                        $itemsWithinThisTimestamp[$idx] = $filePosition;
                    }
                }

$this->sortKeys($itemsWithinThisTimestamp);

foreach ($itemsWithinThisTimestamp as $idx => $filePosition) {
                    if ($skip > 0) {
                        $skip--;

continue;
                    }

$results[$idx] = $filePosition;

if (isset($limit) && ++$itemsAdded >= $limit) {
                        break 3;
                    }
                }
            }
        }

return $results;
    }

public function save(): void
    {
        if (isset($this->currentChunk)) {
            $this->saveChunkToCache($this->currentChunk);
        }

$this->saveMetadata();
    }

public function getLevelCounts(): Collection
    {
        $counts = collect([]);

if (! $this->hasDateFilters()) {
            // without date filters, we can use a faster approach
            foreach ($this->getChunkDefinitions() as $chunkDefinition) {
                foreach ($chunkDefinition['level_counts'] as $severity => $count) {
                    if (! $counts->has($severity)) {
                        $counts[$severity] = 0;
                    }

$counts[$severity] += $count;
                }
            }
        } else {
            foreach ($this->get() as $timestamp => $tsIndex) {
                foreach ($tsIndex as $severity => $logIndex) {
                    if (! $counts->has($severity)) {
                        $counts[$severity] = 0;
                    }

$counts[$severity] += count($logIndex);
                }
            }
        }

return $counts;
    }

public function count(): int
    {
        return array_reduce($this->getChunkDefinitions(), function ($sum, $chunkDefinition) {
            foreach ($chunkDefinition['level_counts'] as $level => $count) {
                if ($this->isLevelSelected($level)) {
                    $sum += $count;
                }
            }

return $sum;
        }, 0);
    }

protected function sortKeys(array &$array): void
    {
        if ($this->isBackward()) {
            krsort($array);
        } else {
            ksort($array);
        }
    }
}

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