FEATURE: Reader badge

Read a every post in a topic that if 50 posts or longer

app/models/badge.rb

@@ -13,6 +13,7 @@ class Badge < ActiveRecord::Base
   FirstLink = 14
   FirstQuote = 15
   ReadFaq = 16
+  Reader = 17
 
   # other consts
   AutobiographerMinBioLength = 10
@@ -20,6 +21,23 @@ class Badge < ActiveRecord::Base
 
   module Queries
 
+    Reader = <<SQL
+    SELECT id user_id, current_timestamp granted_at
+    FROM users
+    WHERE id IN
+    (
+      SELECT pt.user_id
+      FROM post_timings pt
+      JOIN badge_posts b ON b.post_number = pt.post_number AND
+                            b.topic_id = pt.topic_id
+      JOIN topics t ON t.id = pt.topic_id
+      LEFT JOIN user_badges ub ON ub.badge_id = 17 AND ub.user_id = pt.user_id
+      WHERE ub.id IS NULL AND t.posts_count > 50
+      GROUP BY pt.user_id, pt.topic_id, t.posts_count
+      HAVING count(*) = t.posts_count
+    )
+SQL
+
     ReadFaq = <<SQL
     SELECT user_id, read_faq granted_at
     FROM user_stats

app/services/badge_granter.rb

@@ -77,7 +77,7 @@ class BadgeGranter
              WHERE ub.badge_id = :id AND q.user_id IS NULL
            )"
 
-    Badge.exec_sql(sql, id: badge.id)
+    Badge.exec_sql(sql, id: badge.id) if badge.auto_revoke
 
     sql = "INSERT INTO user_badges(badge_id, user_id, granted_at, granted_by_id, post_id)
             SELECT :id, q.user_id, q.granted_at, -1, #{post_id_field}

config/locales/client.en.yml

@@ -2003,3 +2003,6 @@ en:
         read_faq:
           name: Read Faq
           description: Read the community guidelines
+        reader:
+          name: Reader
+          description: Read every post in a topic with more than 50 posts

db/fixtures/006_badges.rb

@@ -18,6 +18,16 @@ trust_level_badges.each do |spec|
   end
 end
 
+Badge.seed do |b|
+  b.id = Badge::Reader
+  b.name = "Reader"
+  b.badge_type_id = BadgeType::Bronze
+  b.multiple_grant = false
+  b.target_posts = false
+  b.query = Badge::Queries::Reader
+  b.auto_revoke = false
+end
+
 Badge.seed do |b|
   b.id = Badge::ReadFaq
   b.name = "Read Faq"

db/migrate/20140715051412_add_auto_revoke_to_badges.rb

@@ -0,0 +1,5 @@
+class AddAutoRevokeToBadges < ActiveRecord::Migration
+  def change
+    add_column :badges, :auto_revoke, :boolean, default: true, null: false
+  end
+end