Class: Scraper

Inherits:
Object
  • Object
show all
Defined in:
lib/rubedility/scraper.rb

Overview

require ‘pry’

Class Method Summary collapse

Class Method Details

.scrape_index_page(index_url) ⇒ Object 



7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
# File 'lib/rubedility/scraper.rb', line 7

def self.scrape_index_page(index_url)
  index = Nokogiri::HTML(open(index_url))

  lessons = []
  index.css("div.lessons_list a").each do |lesson|
    print "."
    name = lesson.css("div.title").text
    number = lesson.css("div.num").text.delete("Lesson").to_i
    lesson_url = "".concat(index_url).concat(lesson.attr("href").split("/").last)
    lessons.push({:name=>name, :number=>number, :lesson_url=>lesson_url})
  end

  return lessons
end

.scrape_lesson_page(lesson_url) ⇒ Object 



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
 
# File 'lib/rubedility/scraper.rb', line 22

def self.scrape_lesson_page(lesson_url)
  begin
    print "."
    lesson = Nokogiri::HTML(open(lesson_url))
    if lesson.css("a#readings").length > 0
      reading_url = lesson.css("a#readings").attr("href").value
    end
    tests_started = lesson.css("span.started span.num").text.to_i
    tests_solved = lesson.css("span.finished span.num").text.to_i
    task_hashes_array = []
    lesson.css("div.task-box").each do |task_row|
      name = task_row.css("h4.title").text.strip
      #url is just the last 'piece' of the task URL
      url = task_row.css("a").attr("href").text
      #have to add that to the end of the 'real' URL, but take off part of it
      task_url = lesson_url.split("/")[0..2].join("/").concat(url)
      difficulty = task_row.css("div.difficulty").text.strip
      tagline = task_row.css("div.synopsis").text.strip
      task_hashes_array.push({:name=>name, :task_url=>task_url, :difficulty=>difficulty, :tagline=>tagline, :task_reading_url=>reading_url})
    end
    lesson_details = {:reading_url=>reading_url, :tests_started=>tests_started, :tests_solved=>tests_solved}
    #return [hash-of-lesson-details, array-of-task-detail-hashes]
    return [lesson_details, task_hashes_array]
  rescue OpenURI::HTTPError => er
    puts "404, Lesson not found"
    puts lesson_url
    puts er
    return nil
  else
  end
end

.scrape_task_page(task_url) ⇒ Object 



54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
 
# File 'lib/rubedility/scraper.rb', line 54

def self.scrape_task_page(task_url)
  print "."
  begin
    task = Nokogiri::HTML(open(task_url))
    content = task.css("div.desc-rb-en div").first.text
    #the way they have the content is not best for command line display.
    #some '\n' and some '\n\n', command line looks better with '\n\n'
    #substitube singles for doubles
    content.gsub!(/[\n]+/,"\n")
    #substitute doubles for singles
    content.gsub!(/[\n]/,"\n\n")
    return {:content=>content}
  rescue OpenURI::HTTPError => er
    puts "404'd!"
    puts task_url
    puts er
    return nil
  else
  end
end