Class: Wikipedia::VandalismDetection::Features::UserReputation

Inherits:
Base
  • Object
show all
Defined in:
lib/wikipedia/vandalism_detection/features/user_reputation.rb

Overview

This feature calculates the average editor’s reputation on the current article.

Instance Method Summary collapse

Methods inherited from Base

#count

Instance Method Details

#calculate(edit) ⇒ Object

Attention! This can be pretty time consuming (up to 2 sec) due to the url request.



13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
# File 'lib/wikipedia/vandalism_detection/features/user_reputation.rb', line 13

def calculate(edit)
  super

  revision = edit.new_revision
  page_id = edit.page.id || Wikipedia::api_request({ titles: edit.page.title }).xpath("//page/@pageid").first

  text = Wikipedia::wikitrust_request({ pageid: page_id, revid: revision.id })
  contributions = text.scan(/(\{\{#t:\d+,\d+,#{revision.contributor}\}\})/)
  # {{#t:trust,revision_id,UserName}}

  trust = 0.0

  unless contributions.empty?
    sum = contributions.reduce(0.0) do |sum, contribution|
      sum += contribution[0].split(',').first.split(':').last.to_f
    end

    trust = sum / contributions.count.to_f
  end

  trust
end