Class: ProjectEulerCli::ArchiveSearcher

Inherits:
Object
  • Object
show all
Defined in:
lib/project_euler_cli/archive_searcher.rb

Overview

Handles searching the problems

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(archive_data) ⇒ ArchiveSearcher

Returns a new instance of ArchiveSearcher.



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# File 'lib/project_euler_cli/archive_searcher.rb', line 10

def initialize(archive_data)
  @archive_data = archive_data

  @results = []
  @searching = false
  @initial_search = true
end

Instance Attribute Details

#results ⇒ Object (readonly)

Array of IDs corresponding to the problems found in last search



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# File 'lib/project_euler_cli/archive_searcher.rb', line 6

def results
  @results
end

#searching ⇒ Object

Tracks whether there is an active search



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# File 'lib/project_euler_cli/archive_searcher.rb', line 8

def searching
  @searching
end

Instance Method Details

#load_terms ⇒ Object

Loads the problem numbers and titles for every page that is not loaded.



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# File 'lib/project_euler_cli/archive_searcher.rb', line 19

def load_terms
  puts "updating keywords..."

  # Loading each archive page
  1.upto(@archive_data[:num_pages]) do |page|
    unless @archive_data[:visited_pages].include?(page)
      html = open("https://projecteuler.net/archives;page=#{page}")
      fragment = Nokogiri::HTML(html)

      problem_links = fragment.css('#problems_table td a')

      i = (page - 1) * 50 + 1
      problem_links.each do |link|
        @archive_data[:problems][i] = link.text
        i += 1
      end

      @archive_data[:visited_pages] << page
    end
  end

  # Loading the recent problems
  unless @archive_data[:visited_pages].include?(0)
    html = open("https://projecteuler.net/recent")
    fragment = Nokogiri::HTML(html)

    problem_links = fragment.css('#problems_table td a')

    i = @archive_data[:num_problems]
    problem_links.each do |link|
      @archive_data[:problems][i] = link.text
      i -= 1
    end

    @archive_data[:visited_pages] << 0
  end
end

#search(terms) ⇒ Object

Performs a simple search of the problems. It accepts multiple terms. Results will contain any of the terms

  • terms - String of search terms



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# File 'lib/project_euler_cli/archive_searcher.rb', line 61

def search(terms)
  if @initial_search
    @initial_search = false
    load_terms
  end

  puts "searching..."
  @results.clear
  @searching = true

  terms.downcase.split(' ').each do |term|
    for i in 1..@archive_data[:num_problems]
      if @archive_data[:problems][i].downcase.include?(term.downcase)
        @results << i
      end
    end
  end
end