Module: ETFC::Runner

Defined in:
lib/etfc/runner.rb

Class Method Summary collapse

Class Method Details

.check_api_credentials ⇒ Object 



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# File 'lib/etfc/runner.rb', line 58

def check_api_credentials
  return if ETFC::FLICKR_API_KEY || ETFC::FLICKR_SHARED_SECRET
  puts 'Please set FLICKR_API_KEY and FLICKR_SHARED_SECRET as ' \
       'environment variables'
  exit 1
end

.run(keywords, output) ⇒ Object

Public: create a collage of images found on flickr for a list of keywords

keywords - array of keywords (up to 10) output - name of the resulting collage

Example:

run(['banana', 'monkey'], 'collage.jpg')
# the collage will be saved to collage.jpg in your current directory

Returns Magick::ImageList; can be discarded as the collage will be saved to the supplied file name on disk



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# File 'lib/etfc/runner.rb', line 17

def run(keywords, output)
  check_api_credentials

  images_urls = ten_img_urls(keywords)

  images_urls.each_with_index do |url, idx|
    Image.download(url, "#{idx}.jpg")
  end

  img_list = Dir[TMP_DIR + '/**.jpg']

  img_list.each { |img| Image.crop(img) }

  Collage.create(img_list, output)
end

.ten_img_urls(keywords) ⇒ Object

Public: get ten image urls for keywords; if less than 10 keywords are supplied, random keywords will be selected from the system dictionary

keywords - array of keywords (up to 10)

Example:

ten_img_urls(['banana'])
#=> ['http://example.com/123.jpog', '...]

Returns an array of ten image URLs



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# File 'lib/etfc/runner.rb', line 44

def ten_img_urls(keywords)
  images = keywords.map do |keyword|
    Flickr.search(keyword)
  end.reject(&:nil?)

  dict = Dictionary.new
  while images.length < 10
    result = Flickr.search(dict.random)
    images << result unless result.nil?
  end

  images.take(10)
end