Class: Cabriolet::CAB::FileCompressionWorker

Inherits:
Fractor::Worker
  • Object
show all
Defined in:
lib/cabriolet/cab/file_compression_worker.rb

Overview

Worker for compressing files in a CAB archive

Instance Method Summary collapse

Instance Method Details

#process(work) ⇒ Fractor::WorkResult

Process a file compression work item

Parameters:

Returns:

  • (Fractor::WorkResult) —

    Result with compressed blocks



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# File 'lib/cabriolet/cab/file_compression_worker.rb', line 11

def process(work)
  # Read source file
  file_data = ::File.binread(work.source_path)
  file_size = file_data.bytesize

  # Split into blocks and compress
  blocks = []
  offset = 0

  while offset < file_size
    remaining = file_size - offset
    chunk_size = [work.block_size, remaining].min
    chunk = file_data[offset, chunk_size]

    # Compress chunk
    compressed_chunk = compress_chunk(chunk, work)

    blocks << {
      uncompressed_size: chunk.bytesize,
      compressed_size: compressed_chunk.bytesize,
      data: compressed_chunk,
    }

    offset += chunk_size
  end

  # Return success result
  Fractor::WorkResult.new(
    result: {
      source_path: work.source_path,
      blocks: blocks,
      total_uncompressed: file_size,
      total_compressed: blocks.sum { |b| b[:compressed_size] },
    },
    work: work,
  )
rescue StandardError => e
  # Return error result
  Fractor::WorkResult.new(
    error: {
      message: e.message,
      class: e.class.name,
      source_path: work.source_path,
    },
    work: work,
  )
end