Class: SL::DuckDuckGoSearch

Inherits:
Object
  • Object
show all
Defined in:
lib/searchlink/searches/duckduckgo.rb

Overview

DuckDuckGo Search

Class Method Summary collapse

Class Method Details

.search(search_type, search_terms, link_text) ⇒ Array

Searches DuckDuckGo for the given search terms

Parameters:

  • search_type (String) —

    the type of search to perform

  • search_terms (String) —

    the terms to search for

  • link_text (String) —

    the text to display for the link

Returns:

  • (Array) —

    an array containing the URL, title, and link text



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# File 'lib/searchlink/searches/duckduckgo.rb', line 36

def search(search_type, search_terms, link_text)
  return zero_click(search_terms, link_text) if search_type =~ /^z$/

  # return SL.ddg(search_terms, link_text) if search_type == 'g' && SL::GoogleSearch.api_key?

  terms = "%5C#{search_terms.url_encode}"
  page = Curl::Html.new("https://duckduckgo.com/?q=#{terms}", compressed: true)

  return false if page.meta["refresh"].nil?

  locs = page.meta["refresh"].match(%r{/l/\?uddg=(.*?)$})
  locs = page.body.match(%r{/l/\?uddg=(.*?)'}) if locs.nil?
  locs = page.body.match(/url=(.*?)'/) if locs.nil?

  return false if locs.nil?

  url = locs[1].url_decode.sub(/&rut=\w+/, "")

  result = url.strip.url_decode || false
  return false unless result

  return false if result =~ /internal-search\.duckduckgo\.com/

  # output_url = CGI.unescape(result)
  output_url = result

  begin
    uri = URI.parse(output_url)
    uri.path = URI::DEFAULT_PARSER.escape(uri.path)
    output_url = uri.to_s
  rescue URI::InvalidURIError
    output_url = URI::DEFAULT_PARSER.escape(output_url)
  end

  output_title = if SL.config["include_titles"] || SL.titleize
                   SL::URL.title(output_url) || ""
                 else
                   ""
                 end

  output_url = SL.first_image(output_url) if search_type =~ /img$/

  [output_url, output_title, link_text]
end

.settings ⇒ Hash

Returns a hash of settings for the DuckDuckGoSearch class

Returns:

  • (Hash) —

    settings for the DuckDuckGoSearch class



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# File 'lib/searchlink/searches/duckduckgo.rb', line 13

def settings
  {
    trigger: "(?:g|ddg|z|ddgimg)",
    searches: [
      ["g", "Google/DuckDuckGo Search"],
      ["ddg", "DuckDuckGo Search"],
      ["z", "DDG Zero Click Search"],
      ["ddgimg", "Return the first image from the destination page"]
    ]
  }
end

.zero_click(search_terms, link_text, disambiguate: false) ⇒ Array

Searches DuckDuckGo for the given search terms and returns a zero click result

Parameters:

  • search_terms (String) —

    the terms to search for

  • link_text (String) —

    the text to display for the link

  • disambiguate (Boolean) (defaults to: false) —

    whether to disambiguate the search

Returns:

  • (Array) —

    an array containing the URL, title, and link text



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# File 'lib/searchlink/searches/duckduckgo.rb', line 94

def zero_click(search_terms, link_text, disambiguate: false)
  search_terms.gsub!(/%22/, '"')
  d = disambiguate ? "0" : "1"
  url = "https://api.duckduckgo.com/?q=#{search_terms.url_encode}&format=json&no_redirect=1&no_html=1&skip_disambig=#{d}"
  begin
    result = Curl::Json.new(url, symbolize_names: true).json
    return SL.ddg(terms, link_text) unless result
  rescue StandardError => e
    SL.add_error("Invalid response", "Search for #{terms}: (#{e})")
    return false
  end
  wiki_link = result[:AbstractURL] || result[:Redirect]
  title = result[:Heading] || false

  if !wiki_link.empty? && !title.empty?
    [wiki_link, title, link_text]
  elsif disambiguate
    SL.ddg(search_terms, link_text)
  else
    zero_click(search_terms, link_text, disambiguate: true)
  end
end