Class: RedditImageDownloader::OptionParser

Inherits:
Object
  • Object
show all
Defined in:
lib/reddit_image_downloader/option_parser.rb

Constant Summary collapse

PAGES = 
%W[top new controversial]
DEFAULT_OPTIONS = 
{
  subreddits: [],
  min_width: 0,
  min_height: 0,
  destination: Dir.pwd,
  max_age: nil,
  page: :top,
  subcommand: :download,
}
"Usage: reddit_image_downloader [options]"
SUBREDDIT_FORMATS = 
%W[-r --subreddits=SUB1,SUB2]
SUBREDDIT_DESC = 
"List of subreddits to download from"
PATH_FORMATS = 
%W[-d --destination=PATH]
PATH_DESC = 
"Path to download images to (defaults to current directory)"
WIDTH_FORMATS = 
%W[-x --min-width=WIDTH]
WIDTH_DESC = 
"Only download images at least WIDTH wide"
HEIGHT_FORMATS = 
%W[-y --min-height=HEIGHT]
HEIGHT_DESC = 
"Only download images at least HEIGHT tall"
PAGE_FORMATS = 
%W[-p --page=PAGE]
PAGE_DESC = 
"Page to download (top [default], new, controversial)"
DAYS_FORMATS = 
%W[-a --max-age=DAYS]
DAYS_DESC = 
"Purge files in destination folder older than DAYS days"
VERSION_FORMATS = 
%W[-v --version]
VERSION_DESC = 
"Print the version of reddit_image_downloader"
HELP_FORMATS = 
%W[-h --help]
HELP_DESC = 
"Show this message"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ OptionParser

Returns a new instance of OptionParser.



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# File 'lib/reddit_image_downloader/option_parser.rb', line 47

def initialize(args)
  @args = args
  @options = DEFAULT_OPTIONS.dup
end

Instance Attribute Details

#args ⇒ Object

Returns the value of attribute args.



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# File 'lib/reddit_image_downloader/option_parser.rb', line 41

def args
  @args
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/reddit_image_downloader/option_parser.rb', line 41

def options
  @options
end

Class Method Details

.parse!(*args) ⇒ Object 



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# File 'lib/reddit_image_downloader/option_parser.rb', line 43

def self.parse!(*args)
  new(*args).tap(&:parse!)
end

Instance Method Details

#docs ⇒ Object 



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# File 'lib/reddit_image_downloader/option_parser.rb', line 56

def docs
  parser.to_s
end

#parse! ⇒ Object 



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# File 'lib/reddit_image_downloader/option_parser.rb', line 52

def parse!
  parser.parse!(args)
end

#parser ⇒ Object 



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# File 'lib/reddit_image_downloader/option_parser.rb', line 60

def parser
  @parser ||= ::OptionParser.new do |parser|
    parser.banner = BANNER

    parser.on(*SUBREDDIT_FORMATS, Array, SUBREDDIT_DESC) do |subreddits|
      options[:subreddits] += subreddits
    end

    parser.on(*PATH_FORMATS, PATH_DESC) do |destination|
      options[:destination] = destination
    end

    parser.on(*WIDTH_FORMATS, Integer, WIDTH_DESC) do |min_width|
      options[:min_width] = min_width
    end

    parser.on(*HEIGHT_FORMATS, Integer, HEIGHT_DESC) do |min_height|
      options[:min_height] = min_height
    end

    parser.on(*PAGE_FORMATS, PAGES, PAGE_DESC) do |page|
      options[:page] = page
    end

    parser.on(*DAYS_FORMATS, Integer, DAYS_DESC) do |days|
      options[:max_age] = days
    end

    parser.on_tail(*VERSION_FORMATS, VERSION_DESC) do
      options[:subcommand] = :version
    end

    parser.on_tail(*HELP_FORMATS, HELP_DESC) do
      options[:subcommand] = :help
    end
  end
end