warn heavily flagged users

Author: pushcx

app/controllers/application_controller.rb

@@ -46,6 +46,10 @@ def check_for_read_only_mode
     true
   end
 
+  def flag_warning
+    @flag_warning = @user && !!DownvotedCommenters.new('1m', 1.day).check_list_for(@user)
+  end
+
   # https://web.archive.org/web/20180108083712/http://umaine.edu/lobsterinstitute/files/2011/12/LobsterColorsWeb.pdf
   def set_traffic_style
     @traffic_intensity = '?'

app/controllers/comments_controller.rb

@@ -6,6 +6,7 @@ class CommentsController < ApplicationController
   before_action :require_logged_in_user_or_400,
                 :only => [:create, :preview, :upvote, :downvote, :unvote]
   before_action :require_logged_in_user, :only => [:upvoted]
+  before_action :flag_warning, only: [:threads]
 
   # for rss feeds, load the user's tag filters if a token is passed
   before_action :find_user_from_rss_token, :only => [:index]

app/controllers/replies_controller.rb

@@ -1,7 +1,7 @@
 class RepliesController < ApplicationController
   REPLIES_PER_PAGE = 25
 
-  before_action :require_logged_in_user, :set_page
+  before_action :require_logged_in_user, :flag_warning, :set_page
   after_action :update_read_ribbons, only: [:unread]
 
   def all

app/controllers/users_controller.rb

@@ -1,6 +1,7 @@
 class UsersController < ApplicationController
   before_action :require_logged_in_moderator,
                 :only => [:enable_invitation, :disable_invitation, :ban, :unban]
+  before_action :flag_warning, only: [:show]
 
   def show
     @showing_user = User.where(:username => params[:username]).first!

app/models/downvoted_commenters.rb

@@ -4,12 +4,11 @@
 class DownvotedCommenters
   include IntervalHelper
 
-  CACHE_TIME = 30.minutes
+  attr_reader :interval, :period, :cache_time
 
-  attr_reader :interval, :period
-
-  def initialize(interval)
+  def initialize(interval, cache_time = 30.minutes)
     @interval = interval
+    @cache_time = cache_time
     length = time_interval(interval)
     @period = length[:dur].send(length[:intv].downcase).ago
   end
@@ -20,7 +19,7 @@ def check_list_for(showing_user)
 
   # aggregates for all commenters; not just those receiving downvotes
   def aggregates
-    Rails.cache.fetch("aggregates_#{interval}", expires_in: CACHE_TIME) {
+    Rails.cache.fetch("aggregates_#{interval}_#{cache_time}", expires_in: self.cache_time) {
       ActiveRecord::Base.connection.exec_query("
         select
           stddev(sum_downvotes) as stddev,
@@ -52,7 +51,8 @@ def avg_sum_downvotes
   end
 
   def commenters
-    Rails.cache.fetch("downvoted_commenters_#{interval}", expires_in: CACHE_TIME) {
+    Rails.cache.fetch("downvoted_commenters_#{interval}_#{cache_time}",
+                      expires_in: self.cache_time) {
       rank = 0
       User.active.joins(:comments)
         .where("comments.created_at >= ?", period)

app/views/comments/threads.html.erb

@@ -1,3 +1,5 @@
+<%= render partial: 'users/flag_warning' if @flag_warning && @showing_user == @user %>
+
 <% @threads.each do |thread| %>
 <ol class="comments comments1">
   <% comments_by_parent = thread.group_by(&:parent_comment_id) %>

app/views/replies/show.html.erb

@@ -11,6 +11,8 @@
   </div>
 </div>
 
+<%= render partial: 'users/flag_warning' if @flag_warning %>
+
 <% if @replies.present? %>
   <ol class="comments comments1">
     <% @replies.each do |reply| %>

app/views/users/_flag_warning.html.erb

@@ -0,0 +1,14 @@
+<div class="box wide flag_warning flash-error">
+  <p>
+    Your comments have been heavily flagged across several stories in the last 30 days.
+    This notice appears conservatively: if you're seeing it, something is unusual and bad and you need to make a change.
+    Reconsider your behavior or just <a href="https://xkcd.com/386">take a break</a>.
+    If you don't understand why you're seeing this after reviewing your <%= link_to 'recent threads', threads_path %>,
+    talk to <%= link_to 'a mod', moderators_path %> about what went wrong.
+  </p>
+
+  <p>
+    If you are outraged by this notice from a site that's full of idiots and led by mods who are power-tripping assholes,
+    you can delete your account from the bottom of your <%= link_to 'settings', settings_path %>.
+  </p>
+</div>

app/views/users/show.html.erb

@@ -1,3 +1,5 @@
+<%= render partial: 'users/flag_warning' if @flag_warning && @showing_user == @user %>
+
 <div class="box wide">
   <div class="legend">
     <% if !@showing_user.is_active? %>