Added the Stackoverflow fetcher: bring stackoverflow to the console where you already are

.gitignore

@@ -1 +1,3 @@
 .DS_Store
+
+config.rb

README.md

@@ -153,6 +153,29 @@ The following is a non-exhaustive list of things you can do:
 	betty turn web on
 	betty please tell me what is the weather like in London
 
+    Stackoverflow
+    betty so how to post json data with curl
+    betty stackoverflow get local time in command line
+    betty stack open the browser from the console in linux
+
+Stackoverflow
+-------------
+
+You can automate the following process with Betty: 
+
+1. Search in Google a technical question (Google is good at natural language processing!)
+2. Fetch and display the first Stackoverflow result
+
+Unfortunately, due to API restrictions, an API Key needs to be activated. To get one, here are the steps:
+1. Go to [the Google Console](https://console.developers.google.com/project)
+2. Create a project
+3. Activate [Google Custom Search](https://console.developers.google.com/project/apps~<PROJECT_ID>/apiui/api)
+4. Go to [Credentials](https://console.developers.google.com/project/apps~<PROJECT_ID>/apiui/credential)
+5. Click on `CREATE NEW KEY` button and get your API Key
+6. Execute `cp config.rb.example config.rb` and add your API key there : `vim config.rb`.
+
+All set
+
 Contributing
 ------------
 

config.rb.example

@@ -0,0 +1,3 @@
+module ApiConfig
+  GOOGLE_SEARCH_API_KEY = "AIzaSyCxPfXTDuuTjBCTmDlQB5HJsbKfANFlwso"
+end

lib/stackoverflow.rb

@@ -0,0 +1,115 @@
+module Stackoverflow
+  require 'cgi'
+
+  def self.interpret(command)
+    responses = []
+    matches = command.match(/^(so|stackoverflow|stack)\s+(.+)/)
+
+    if matches
+      return responses if !require(File.expand_path("../../config.rb", __FILE__)) || !defined? ApiConfig || !defined? ApiConfig::GOOGLE_SEARCH_API_KEY || ApiConfig::GOOGLE_SEARCH_API_KEY.nil? || ApiConfig::GOOGLE_SEARCH_API_KEY == ""
+
+      query = matches[-1]
+      google_results = get_remote_json("https://www.googleapis.com/customsearch/v1?cx=012211726421152102993%3Autn0onfqvdc&key=#{ApiConfig::GOOGLE_SEARCH_API_KEY}", {:q => query})['items']
+      stackoverflow_answers = google_results.select{ |result| result['link'].start_with?("http://stackoverflow.com/questions")}
+      return responses if Array(stackoverflow_answers).length == 0
+
+      links_array = stackoverflow_answers[0]['link'].split('/')
+      id = links_array[links_array.index('questions')+1].to_i
+
+      return responses if id == 0
+
+      stackoverflow_result = get_remote_json("https://api.stackexchange.com/2.2/questions/#{id}?order=desc&sort=votes&site=stackoverflow&filter=!ay7uLWNahtxLpA")
+
+      responses << {
+        :command => "open #{stackoverflow_result['items'][0]['link']}",
+        :explanation => handle_stackoverflow_data(stackoverflow_result['items'][0]),
+        :ask_first => true
+      }
+    end
+
+    responses
+  end
+
+  def self.help
+    commands = []
+    commands << {
+      :category => "Stackoverflow",
+      :description => "Fetch stackoverflow responses. \nNeeds an API key: please execute cp #{File.expand_path("../../config.rb", __FILE__)}.example #{File.expand_path("../../config.rb", __FILE__)}\n\nOr get your own api key there: ",
+      :usage => ["so how to post json data with curl",
+                  "stackoverflow get local time in command line",
+                  "stack open the browser from the console in linux"]
+    }
+    commands
+  end
+
+  private
+
+  def self.handle_stackoverflow_data(data)
+    "\n"+
+    "-----------------------\n"+
+    "Stackoverflow question:\n"+ 
+    "-----------------------\n\n"+
+    data['title'].bold +
+    "\n\n"+
+    code_in_bold(CGI.unescapeHTML(data['body_markdown']))+
+    "\n\n"+
+    "------------\n"+
+    "Best Answer:\n"+
+    "------------\n\n"+
+    code_in_bold(CGI.unescapeHTML(data['answers'][0]['body_markdown']))
+  end
+
+  def self.code_in_bold(phrase)
+    phrase.split("\n").map do |line| 
+      if line.start_with?('    ') 
+        line.bold
+      else
+        unquoted = true
+        line.split('`').map{ |string| if unquoted then string else string.bold; unquoted ^= true end}.join('')
+      end
+    end.join("\n")
+  end
+
+  def self.get_remote_json(url, params={})
+    require 'uri'
+    require 'net/http'
+    require "json"
+    uri = URI(url)
+    if !params.empty?
+      if uri.query.nil? || uri.query == ""
+        uri.query = URI.encode_www_form(params)
+      else
+        uri.query += "&"+URI.encode_www_form(params)
+      end
+    end
+
+    http = Net::HTTP.new(uri.host, uri.port)
+    http.use_ssl = uri.scheme == 'https'
+    res = http.request(Net::HTTP::Get.new(uri.request_uri))
+
+    case res
+      when Net::HTTPSuccess then  
+        begin
+          if res.header[ 'Content-Encoding' ].eql?('gzip') then
+            # puts "Performing gzip decompression for response body." if debug_mode
+            sio = StringIO.new(res.body)
+            gz = Zlib::GzipReader.new(sio)
+            content = gz.read()
+            # puts "Finished decompressing gzipped response body." if debug_mode
+          else
+            # puts "Page is not compressed. Using text response body. " if debug_mode
+            content = res.body
+          end
+        rescue Exception
+          puts "Error occurred (#{$!.message})"
+          # handle errors
+          raise $!.message
+        end
+    end
+
+    return JSON.parse(content)
+  end
+
+end
+
+$executors << Stackoverflow

main.rb

@@ -6,7 +6,7 @@
 $executors = []
 $LOG = Logger.new(File.open(ENV['HOME'] + '/.betty_history', 'a+'))
 
-Dir[File.dirname(__FILE__) + '/lib/*.rb'].each {|file|
+(Dir[File.dirname(__FILE__) + '/lib/*.rb']+Dir[File.dirname(__FILE__) + '/utils/*.rb']).each {|file|
   begin
     require file
   rescue Exception => e

utils/string.rb

@@ -0,0 +1,20 @@
+class String
+  def black;          "\033[30m#{self}\033[0m" end
+  def red;            "\033[31m#{self}\033[0m" end
+  def green;          "\033[32m#{self}\033[0m" end
+  def  brown;         "\033[33m#{self}\033[0m" end
+  def blue;           "\033[34m#{self}\033[0m" end
+  def magenta;        "\033[35m#{self}\033[0m" end
+  def cyan;           "\033[36m#{self}\033[0m" end
+  def gray;           "\033[37m#{self}\033[0m" end
+  def bg_black;       "\033[40m#{self}\0330m"  end
+  def bg_red;         "\033[41m#{self}\033[0m" end
+  def bg_green;       "\033[42m#{self}\033[0m" end
+  def bg_brown;       "\033[43m#{self}\033[0m" end
+  def bg_blue;        "\033[44m#{self}\033[0m" end
+  def bg_magenta;     "\033[45m#{self}\033[0m" end
+  def bg_cyan;        "\033[46m#{self}\033[0m" end
+  def bg_gray;        "\033[47m#{self}\033[0m" end
+  def bold;           "\033[1m#{self}\033[22m" end
+  def reverse_color;  "\033[7m#{self}\033[27m" end
+end