2264-3

2264/3/Gemfile

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+source 'https://rubygems.org'
+ruby '2.4.1'
+
+gem 'json'
+gem 'mechanize'
+gem 'ohm'
+gem 'pry'
+gem 'pry-nav'
+gem 'shotgun'
+gem 'sinatra'
+gem 'thin'

2264/3/config.ru

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+Bundler.require
+Dir.glob('./{controllers,helpers,models}/*.rb').sort.each { |file| require file }
+
+Post.redis = Redic.new('redis://127.0.0.1:6379/0')
+Comment.redis = Redic.new('redis://127.0.0.1:6379/1')
+
+use Rack::MethodOverride
+
+map('/') { run PostsController }

2264/3/controllers/application_controller.rb

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+require 'sinatra'
+# main controller
+class ApplicationController < Sinatra::Base
+  set :views, File.expand_path(File.join(__FILE__, '../../views'))
+end

2264/3/controllers/posts_controller.rb

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+require 'sinatra'
+# controller for posts
+class PostsController < ApplicationController
+  get '/posts/new' do
+    erb :'post/new'
+  end
+
+  get '/posts' do
+    @posts = Post.all
+    erb :'post/index'
+  end
+
+  get '/post/:id' do
+    @posts = Post.all
+    @post = @posts[params[:id]]
+    erb :'post/show'
+  end
+
+  post '/posts' do
+    post = Post.create link: params[:link]
+    PostAnalyser.new(post).launch
+    redirect '/posts'
+  end
+
+  delete '/posts/:id/delete' do
+    @post = Post.all[params[:id]]
+    @post.delete
+    redirect '/posts'
+  end
+end

2264/3/helpers/comment_rating_counter.rb

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+require 'net/https'
+require 'uri'
+require 'json'
+
+# Rating Counter
+class CommentRatingCounter
+  URL = 'https://westcentralus.api.cognitive.microsoft.com'.freeze
+  PATH = '/text/analytics/v2.0/sentiment'.freeze
+  KEY = 'de8a560ccae541e08ec1a30dcdd191a4'.freeze
+
+  attr_reader :uri, :documents, :request
+
+  def initialize(texts)
+    @uri = URI(URL + PATH)
+    build_documents(texts)
+  end
+
+  def launch_counter
+    build_answer
+  end
+
+  private
+
+  def build_documents(text_body)
+    @documents = { documents: [] }
+    text_body.each_with_index do |text, index|
+      documents[:documents].push('id' => index.to_s, 'language' => 'ru', 'text' => text)
+    end
+  end
+
+  def build_answer
+    JSON.parse(build_response.body)['documents'].map do |document|
+      (document['score'] * 200).to_i - 100
+    end
+  end
+
+  def build_response
+    build_request
+    Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme == 'https') do |http|
+      http.request(request)
+    end
+  end
+
+  def build_request
+    @request = Net::HTTP::Post.new(uri)
+    request['Content-Type'] = 'application/json'
+    request['Ocp-Apim-Subscription-Key'] = KEY
+    request.body = documents.to_json
+  end
+end

2264/3/helpers/comments_parser.rb

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+require 'json'
+require 'mechanize'
+
+# Comments parser
+class CommentsParser
+  attr_reader :agent, :path_to_page
+
+  def initialize(link)
+    @agent = Mechanize.new
+    @path_to_page = link
+  end
+
+  def launch_parser
+    parse_comments_from_page
+  end
+
+  private
+
+  def parse_comments_from_page
+    response = parse_comments
+    comments = JSON.parse(response.body)['comments']
+    comments.map do |elem|
+      elem['text'].sub("\n", ' ')
+    end
+  end
+
+  def parse_page_code
+    agent.get(path_to_page).parser.css('span.news_view_count').last.values[1]
+  end
+
+  def parse_comments
+    on_url = "https://comments.api.onliner.by/news/tech.post/#{parse_page_code}/comments?limit=100&_=0.9046614793472092"
+    agent.get(on_url)
+  end
+end

2264/3/helpers/post_analyzer.rb

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+# class is used for analyzing onliner's posts
+class PostAnalyser
+  attr_reader :post, :text_body, :ratings
+
+  def initialize(post)
+    @post = post
+    @text_body = launch_comments_parser
+    @ratings = launch_rating_counter
+  end
+
+  def launch
+    refresh_post_title
+    build_post_stat
+    refresh_post_rating
+  end
+
+  private
+
+  def launch_comments_parser
+    CommentsParser.new(post.link).launch_parser
+  end
+
+  def launch_rating_counter
+    CommentRatingCounter.new(text_body).launch_counter
+  end
+
+  def refresh_post_title
+    page = Mechanize.new.get(post.link)
+    @post.update(title: page.title)
+  end
+
+  def build_post_stat
+    text_body.each_with_index do |text, index|
+      comment = Comment.create(text: text, rating: ratings[index])
+      post.comments.add(comment)
+    end
+  end
+
+  def refresh_post_rating
+    post_rating = (ratings.sum / text_body.size).to_i
+    @post.update(rating: post_rating)
+  end
+end

2264/3/models/comment.rb

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+# class for onliner's comments
+class Comment < Ohm::Model
+  attribute :text
+  attribute :rating
+end

2264/3/models/post.rb

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+# class for onliner posts
+class Post < Ohm::Model
+  attribute :link
+  attribute :title
+  set :comments, :Comment
+  attribute :rating
+end

2264/3/views/layout.erb

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+<!DOCTYPE html>
+<html>
+<head>
+  <mete charset="UTF-8" />
+  <title>Your links</title>
+</head>
+<body>
+  <%= yield %>
+</body>
+</html>

2264/3/views/post/index.erb

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+<div>
+  <h1>Your Links</h1>
+  <div>
+    <table>
+      <thead>
+      <tr>
+        <th>Links</th>
+        <th>Title</th>
+      </tr>
+      </thead>
+
+      <tbody>
+      <% @posts.each do |post| %>
+        <tr>
+          <td><a href='/post/<%= post.id %>'><%= post.title %></a></td>
+          <td><%= post.rating %></td>
+        </tr>
+      <% end %>
+      </tbody>
+    </table>
+  </div>
+  <div>
+    <a href='/post/new'>Add new post</a>
+  </div>
+</div>

2264/3/views/post/new.erb

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+
+<h1>Add Post</h1>
+
+<form action="/posts" method="post">
+    <label for="post">Post's link</label>
+    <input type="text" name="link" id="link" >
+  <button type="submit">Add</button>
+</form>

2264/3/views/post/show.erb

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+<body>
+<div>
+  <a href='<%[email protected] %>'>
+    <%[email protected] %>
+  </a>
+</div>
+<div>
+  <a href='/'>
+    Watch all posts
+  </a>
+</div>
+<div>
+  <form action="/posts/<%= @post.id %>/delete" method="post">
+    <input id="hidden" type="hidden" name="_method" value="delete">
+    <input type="submit"  onclick="return confirm('Do you realy need to delete this post?')" value="Delete post">
+  </form>
+</div>
+<h1>
+  <%= @post.title %>
+</h1>
+<table>
+  <tr>
+    <th>Comments</th>
+    <th>Ratings</th>
+  </tr>
+  <% @post.comments.each do |comment| %>
+    <tr>
+      <td>
+        <div>
+          <%= comment.text %>
+        </div>
+      </td>
+      <td>
+        <%= comment.rating %>
+      </td>
+    </tr>
+  <% end %>
+</table>
+</body>