class CodeClimate::TestReporter::CalculateBlob

def blob_id
  calculate_with_file or calculate_with_git
end

def calculate_with_file
  File.open(@file_path, "rb") do |file|
    header = "blob #{file.size}\0"
    content = file.read
    store = header + content
    return Digest::SHA1.hexdigest(store)
  end
rescue EncodingError
  puts "WARNING: Unable to read #{@file_path}\nUsing git for blob calculation"
  nil
end

def calculate_with_git
  output = `git hash-object -t blob #{@file_path}`.chomp
  raise "ERROR: Failed to calculate blob with git" unless $?.success?
  output
end

def initialize(file_path)
  @file_path = file_path
end