AgileVentures / WebsiteOne / #241

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#241

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42.86
/lib/validators/image_url_validator.rb
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# frozen_string_literal: true
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class ImageUrlValidator < ActiveModel::Validator




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  IMAGE_HOST_WHITELIST = %w(bluemelon.com deviantart.com facebook.com




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                            flickr.com freeimagehosting.net imagebam.com imageshack.com










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                            imagevenue.com imgur.com instagram postimage.org photobucket.com










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                            picasa.com shutterfly.com slickpic.com snapfish.com smugmug.com










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                            tinypic.com twitpic.com webshots.com weheartit.com zenfolio.com).freeze










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  def validate(record)




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    if record.image_url.present?




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      if invalid_format?(record.image_url)




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        record.errors.add(:image_url, 'Invalid format. Image must be png, jpg, or jpeg.')




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      end










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      unless is_image_host_whitelisted?(record.image_url)




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        record.errors.add(:image_url, 'Invalid image url. Image provider not found in provider whitelist.')




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      end










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    end










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  end










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  private




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  def invalid_format?(url)




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    validation_regex = /\.(png|jpg|jpeg)$/i




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    validation_regex.match(url).nil?




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  end










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  def is_image_host_whitelisted?(url)




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    IMAGE_HOST_WHITELIST.any? { |whitelist_item| url.match /#{Regexp.escape(whitelist_item)}/ }




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  end










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end
























    

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