Ben/add more recent posts to home feed (#775)

* Add meta to sidebar and adjust ranking algo

* Update home feed to show more recent posts from folks you follow

* Only show recent posts on home feed if user signed in

app/assets/javascripts/initializers/initializeFetchFollowedArticles.js.erb

@@ -14,10 +14,43 @@ function insertArticle(article,parent,insertPlace) {
 }
 
 function insertInitialArticles(user) {
-  var el = document.getElementById("home-articles-object")
+  var el = document.getElementById("home-articles-object");
   if (!el) {return}
-  var articlesJSON = JSON.parse(el.dataset.articles)
+  el.innerHTML = "";
+  insertNewArticles(user);
+  insertTopArticles(user);
   el.outerHTML = "";
+}
+
+function insertNewArticles(user){
+  var el = document.getElementById("new-articles-object");
+  var articlesJSON = JSON.parse(el.dataset.articles);
+  var insertPlace = document.getElementById("article-index-hidden-div");
+  if (insertPlace) {
+      articlesJSON.forEach(function(article){
+      var articlePoints = 0
+      var containsUserID = findOne([article.user_id], user.followed_user_ids)
+      articlePoints = articlePoints + (intersect_arrays(user.followed_tag_names, article.cached_tag_list_array).length*2) + article.positive_reactions_count
+      if (containsUserID || article.user_id === user.id) {
+        articlePoints = articlePoints + 16
+      }
+      article['points'] = articlePoints
+    });
+    var sortedArticles = articlesJSON.sort(function(a, b) {
+      return b.points - a.points;
+    });
+    sortedArticles.forEach(function(article){
+      var parent = insertPlace.parentNode;
+      if ( article.points > 15 && !document.getElementById("article-link-"+article.id) ) {
+        insertArticle(article,parent,insertPlace);
+      }
+    });
+  }
+}
+
+function insertTopArticles(user){
+  var el = document.getElementById("home-articles-object");
+  var articlesJSON = JSON.parse(el.dataset.articles)
   var insertPlace = document.getElementById("article-index-hidden-div");
   if (insertPlace) {
       articlesJSON.forEach(function(article){

app/black_box/black_box.rb

@@ -1,7 +1,7 @@
 class BlackBox
   def self.article_hotness_score(article)
     return (article.featured_number || 10000) / 10000 unless Rails.env.production?
-    reaction_points = article.reactions.sum(:points)
+    reaction_points = article.score
     super_super_recent_bonus = article.published_at > 1.hours.ago ? 18 : 0
     super_recent_bonus = article.published_at > 3.hours.ago ? 11 : 0
     recency_bonus = article.published_at > 11.hours.ago ? 70 : 0

app/controllers/stories_controller.rb

@@ -119,6 +119,14 @@ class StoriesController < ApplicationController
         @stories = @stories.offset(offset)
       end
       @featured_story = @stories.where.not(main_image: nil).first&.decorate || Article.new
+      if user_signed_in?
+        @new_stories = Article.where("published_at > ? AND score > ?", 4.hours.ago, -30).
+          includes(:user).
+          limit(45).
+          order("published_at DESC").
+          limited_column_select.
+          decorate
+      end
     end
     @stories = @stories.decorate
     assign_podcasts

app/models/article.rb

@@ -355,6 +355,7 @@ class Article < ApplicationRecord
   end
 
   def async_score_calc
+    update_column(:score, reactions.sum(:points))
     update_column(:hotness_score, BlackBox.article_hotness_score(self))
     update_column(:spaminess_rating, BlackBox.calculate_spaminess(self))
     index! if tag_list.exclude?("hiring")

app/views/articles/_main_stories_feed.html.erb

@@ -28,7 +28,14 @@
     <% end %>
   <% end %>
 <% else %>
-  <% cache("fetched-home-articles-object", :expires_in => 5.minutes) do %>
+  <% cache("fetched-home-articles-object", :expires_in => 3.minutes) do %>
+      <div id="new-articles-object" data-articles="
+      <%=@new_stories.to_json(only:
+                            [:title, :path, :id, :user_id, :comments_count, :positive_reactions_count],
+                          methods:
+                            [:readable_publish_date, :cached_tag_list_array, :flare_tag, :class_name],
+                          include: [user: {only: [:username, :name], methods: [:profile_image_90]}]) %>">
+    </div>
     <div id="home-articles-object" data-articles="
       <%=@stories.to_json(only:
                             [:title, :path, :id, :user_id, :comments_count, :positive_reactions_count],

db/migrate/20180930015157_add_score_to_articles.rb

@@ -0,0 +1,5 @@
+class AddScoreToArticles < ActiveRecord::Migration[5.1]
+  def change
+    add_column :articles, :score, :integer, default: 0
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20180928161837) do
+ActiveRecord::Schema.define(version: 20180930015157) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -90,6 +90,7 @@ ActiveRecord::Schema.define(version: 20180928161837) do
     t.integer "reactions_count", default: 0, null: false
     t.boolean "receive_notifications", default: true
     t.boolean "removed_for_abuse", default: false
+    t.integer "score", default: 0
     t.integer "second_user_id"
     t.boolean "show_comments", default: true
     t.text "slug"