Class: ContentCheckerStrategy

Inherits:
GeneralStrategy show all
Defined in:
lib/burnspam/point_tracker.rb

Overview

A specialized strategy for analizing the content field.

Version

0.1.1

Date

2011/12/18

@author

Brian Burns, x10205284

@reference

snook.ca/archives/other/effective_blog_comment_spam_blocker

Constant Summary collapse

@@recent_posts = 
["5", "4", "3" , "2", "1"]

Instance Method Summary collapse

Methods inherited from GeneralStrategy

#keywords, #test

Constructor Details

#initialize(content) ⇒ ContentCheckerStrategy

Stores content, URLS and individual words



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# File 'lib/burnspam/point_tracker.rb', line 223

def initialize(content)
  @content = content 
  @urls = URI.extract(content)
  @keywords = @content.split /[\s,']+/
end

Instance Method Details

#count_urls ⇒ Object 



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# File 'lib/burnspam/point_tracker.rb', line 229

def count_urls
  @urls.count
end

#duplicate? ⇒ Boolean

Compares a comment with recent comments and if a match is found returns true. Otherwise removes the oldest comment from the end and adds new one to the front (First In First Out queue)

Returns:

  • (Boolean) 


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# File 'lib/burnspam/point_tracker.rb', line 265

def duplicate?
  @@recent_posts.each do |comment|
    if comment == @content
      return true
    end
  end
  @@recent_posts.pop
  @@recent_posts.unshift @content
  return false
end

#length ⇒ Object 



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# File 'lib/burnspam/point_tracker.rb', line 246

def length
  @content.length
end

#starts_with? ⇒ Boolean

Checks for (currently 2) keywords that we don’t like

Returns:

  • (Boolean) 


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# File 'lib/burnspam/point_tracker.rb', line 251

def starts_with?
  if @content =~ /Cool(.*)/
    return true
  elsif @content =~ /Wow(.*)/
    return true
  else
    return false
  end
end

#url_length ⇒ Object

Calculate the average length of all URLs in content



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# File 'lib/burnspam/point_tracker.rb', line 234

def url_length
  unless @urls.empty? 
    @total_length = 0
    @urls.each do |x|
      @total_length += x.length
    end
    @total_length / @urls.size
  else
    0
  end
end