fixes #2197

app/helpers/forum_topic_visits_helper.rb

@@ -0,0 +1,2 @@
+module ForumTopicVisitsHelper
+end

app/models/forum_topic.rb

@@ -105,16 +105,8 @@ class ForumTopic < ActiveRecord::Base
     super + [:text_index]
   end
 
-  def read_by?(user, read_forum_topic_ids)
-    if read_forum_topic_ids.any? {|topic_id, timestamp| id.to_s == topic_id && updated_at.to_i > timestamp.to_i}
-      return false
-    end
-    if read_forum_topic_ids.any? {|topic_id, timestamp| id.to_s == topic_id && updated_at.to_i <= timestamp.to_i}
-      return true
-    end
-    return false if user.last_forum_read_at.nil?
-    return true if updated_at < user.last_forum_read_at
-    return false
+  def check!(user)
+    ForumTopicVisit.check!(user, self)
   end
 
   def mark_as_read(read_forum_topic_ids)

app/models/forum_topic_visit.rb

@@ -0,0 +1,30 @@
+class ForumTopicVisit < ActiveRecord::Base
+  def self.check!(user, topic)
+    match = where(:user_id => user.id, :forum_topic_id => topic.id).first
+    result = false
+    if match
+      if match.last_read_at < topic.updated_at
+        result = true
+      end
+      match.update_attribute(:last_read_at, topic.updated_at)
+    else
+      create(:user_id => user.id, :forum_topic_id => topic.id, :last_read_at => topic.updated_at)
+    end
+    result
+  end
+
+  def self.check_list!(user, topics)
+    matches = where(:user_id => user.id, :forum_topic_id => topics.map(&:id)).to_a.inject({}) do |hash, x|
+      hash[x.forum_topic_id] = x
+      hash
+    end
+    topics.each do |topic|
+      if matches[topic.id]
+        matches[topic.id].update_attribute(:last_read_at, topic.updated_at)
+      else
+        create(:user_id => user.id,, :forum_topic_id => topic.id, :last_read_at => topic.updated_at)
+      end
+    end
+    matches
+  end
+end

config/routes.rb

@@ -124,6 +124,7 @@ Rails.application.routes.draw do
     collection do
       post :mark_all_as_read
     end
+    resource :visit, :controller => "forum_topic_visits"
   end
   resources :ip_bans
   resources :iqdb_queries, :only => [:create]

db/migrate/20140701224800_create_forum_topic_visits.rb

@@ -0,0 +1,14 @@
+class CreateForumTopicVisits < ActiveRecord::Migration
+  def change
+    create_table :forum_topic_visits do |t|
+      t.integer :user_id
+      t.integer :forum_topic_id
+      t.timestamp :last_read_at
+
+      t.timestamps
+    end
+
+    add_index :forum_topic_visits, :user_id
+    add_index :forum_topic_visits, :forum_topic_id
+  end
+end

db/structure.sql

@@ -3,6 +3,7 @@
 --
 
 SET statement_timeout = 0;
+SET lock_timeout = 0;
 SET client_encoding = 'UTF8';
 SET standard_conforming_strings = on;
 SET check_function_bodies = false;
@@ -1979,6 +1980,39 @@ CREATE SEQUENCE forum_posts_id_seq
 ALTER SEQUENCE forum_posts_id_seq OWNED BY forum_posts.id;
 
 
+--
+-- Name: forum_topic_visits; Type: TABLE; Schema: public; Owner: -; Tablespace: 
+--
+
+CREATE TABLE forum_topic_visits (
+    id integer NOT NULL,
+    user_id integer,
+    forum_topic_id integer,
+    last_read_at timestamp without time zone,
+    created_at timestamp without time zone,
+    updated_at timestamp without time zone
+);
+
+
+--
+-- Name: forum_topic_visits_id_seq; Type: SEQUENCE; Schema: public; Owner: -
+--
+
+CREATE SEQUENCE forum_topic_visits_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+--
+-- Name: forum_topic_visits_id_seq; Type: SEQUENCE OWNED BY; Schema: public; Owner: -
+--
+
+ALTER SEQUENCE forum_topic_visits_id_seq OWNED BY forum_topic_visits.id;
+
+
 --
 -- Name: forum_topics; Type: TABLE; Schema: public; Owner: -; Tablespace: 
 --
@@ -3881,6 +3915,13 @@ ALTER TABLE ONLY favorites_99 ALTER COLUMN id SET DEFAULT nextval('favorites_id_
 ALTER TABLE ONLY forum_posts ALTER COLUMN id SET DEFAULT nextval('forum_posts_id_seq'::regclass);
 
 
+--
+-- Name: id; Type: DEFAULT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY forum_topic_visits ALTER COLUMN id SET DEFAULT nextval('forum_topic_visits_id_seq'::regclass);
+
+
 --
 -- Name: id; Type: DEFAULT; Schema: public; Owner: -
 --
@@ -4212,6 +4253,14 @@ ALTER TABLE ONLY forum_posts
     ADD CONSTRAINT forum_posts_pkey PRIMARY KEY (id);
 
 
+--
+-- Name: forum_topic_visits_pkey; Type: CONSTRAINT; Schema: public; Owner: -; Tablespace: 
+--
+
+ALTER TABLE ONLY forum_topic_visits
+    ADD CONSTRAINT forum_topic_visits_pkey PRIMARY KEY (id);
+
+
 --
 -- Name: forum_topics_pkey; Type: CONSTRAINT; Schema: public; Owner: -; Tablespace: 
 --
@@ -6075,6 +6124,20 @@ CREATE INDEX index_forum_posts_on_text_index ON forum_posts USING gin (text_inde
 CREATE INDEX index_forum_posts_on_topic_id ON forum_posts USING btree (topic_id);
 
 
+--
+-- Name: index_forum_topic_visits_on_forum_topic_id; Type: INDEX; Schema: public; Owner: -; Tablespace: 
+--
+
+CREATE INDEX index_forum_topic_visits_on_forum_topic_id ON forum_topic_visits USING btree (forum_topic_id);
+
+
+--
+-- Name: index_forum_topic_visits_on_user_id; Type: INDEX; Schema: public; Owner: -; Tablespace: 
+--
+
+CREATE INDEX index_forum_topic_visits_on_user_id ON forum_topic_visits USING btree (user_id);
+
+
 --
 -- Name: index_forum_topics_on_creator_id; Type: INDEX; Schema: public; Owner: -; Tablespace: 
 --
@@ -6864,3 +6927,5 @@ INSERT INTO schema_migrations (version) VALUES ('20140604002414');
 
 INSERT INTO schema_migrations (version) VALUES ('20140613004559');
 
+INSERT INTO schema_migrations (version) VALUES ('20140701224800');
+