Class: Rufio::FilePreview

Inherits:
Object
  • Object
show all
Defined in:
lib/rufio/file_preview.rb

Constant Summary collapse

BINARY_THRESHOLD =

treat as binary if 30% or more binary characters

0.3
DEFAULT_MAX_LINES = 
50
MAX_LINE_LENGTH = 
500
BINARY_SAMPLE_SIZE =

Binary detection constants

512
PRINTABLE_CHAR_THRESHOLD = 
32
CONTROL_CHAR_TAB = 
9
CONTROL_CHAR_NEWLINE = 
10
CONTROL_CHAR_CARRIAGE_RETURN = 
13

Instance Method Summary collapse

Constructor Details

#initialize ⇒ FilePreview

Returns a new instance of FilePreview.



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# File 'lib/rufio/file_preview.rb', line 16

def initialize
  # future: hold syntax highlight settings etc.
end

Instance Method Details

#preview_file(file_path, max_lines: DEFAULT_MAX_LINES) ⇒ Object 



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# File 'lib/rufio/file_preview.rb', line 20

def preview_file(file_path, max_lines: DEFAULT_MAX_LINES)
  return error_response(ConfigLoader.message('file.not_found')) unless File.exist?(file_path)
  return error_response(ConfigLoader.message('file.not_readable')) unless File.readable?(file_path)

  file_size = File.size(file_path)
  return empty_response if file_size == 0

  begin
    # binary file detection
    sample = File.binread(file_path, [file_size, BINARY_SAMPLE_SIZE].min)
    return binary_response(file_path) if binary_file?(sample)

    # process as text file
    lines = read_text_file(file_path, max_lines)
    file_type = determine_file_type(file_path)
    
    {
      type: file_type[:type],
      language: file_type[:language],
      lines: lines[:content],
      truncated: lines[:truncated],
      size: file_size,
      modified: File.mtime(file_path),
      encoding: lines[:encoding]
    }
  rescue => e
    error_response("#{ConfigLoader.message('file.read_error')}: #{e.message}")
  end
end