class File

# File lib/flickru/file.rb, line 50
def File.date_taken file
  attempt = 1
  begin
     case attempt
     when 1 then EXIFR::JPEG.new(file).date_time_original.strftime "%y-%m-%d %H:%M:%S"
     when 2 then EXIFR::TIFF.new(file).date_time_original.strftime "%y-%m-%d %H:%M:%S"
     else nil
     end
  rescue
     attempt += 1
     retry
  end
end

# File lib/flickru/file.rb, line 36
def File.duration video
  s = `#{Escape.shell_command ["ffmpeg", "-i", video]} 2>&1`
  if s =~ /Duration: ([\d][\d]):([\d][\d]):([\d][\d]).([\d]+)/
    hours     = $1.to_i
    mins      = $2.to_i
    seconds   = $3.to_i
    # fractions = ("." + $4).to_f

    hours * 60 * 60 + mins * 60 + seconds
  else
    0
  end
end

# File lib/flickru/file.rb, line 10
def File.find dir
  found = Array.new
  Find.find dir do |file|
    if File.directory? file
      if File.basename(file)[0] == ?.
        Find.prune # don't look any further into this directory
      else
        next
      end
    else
      if yield file
        found << file
      end
    end
  end
  found
end

# File lib/flickru/file.rb, line 64
def File.geotagged? file
  attempt = 1
  begin
     case attempt
     when 1 then
        hash = EXIFR::JPEG.new(file).to_hash
     when 2 then
        hash = EXIFR::TIFF.new(file).to_hash
     else return false
     end
  rescue
     puts $!
     attempt += 1
     retry
  end

  lat     = hash.key? :gps_latitude
  lon     = hash.key? :gps_longitude
  lat_ref = hash.key? :gps_latitude_ref
  lon_ref = hash.key? :gps_longitude_ref

  lat and lon and lat_ref and lon_ref
end

# File lib/flickru/file.rb, line 88
def File.human_readable_size file_size
  if file_size < 1024 ** 1
    (file_size / 1024 ** 0).to_s + " bytes"
  elsif file_size < 1024 ** 2
    (file_size / 1024 ** 1).to_s + "KB"
  elsif file_size < 1024 ** 3
    (file_size / 1024 ** 2).to_s + "MB"
  else
    (file_size / 1024.0 ** 3).round.to_s + "GB" # with float division
  end
end

# File lib/flickru/file.rb, line 28
def File.image? file
  IMAGE_EXTENSIONS.include? File.extname(file).downcase
end

# File lib/flickru/file.rb, line 32
def File.video? file
  VIDEO_EXTENSIONS.include? File.extname(file).downcase
end