Feature: Paying it forward badge

app/models/badge.rb

@@ -7,12 +7,24 @@ class Badge < ActiveRecord::Base
   GreatPost = 8
   Autobiographer = 9
   Editor = 10
+  PayingItForward = 11
 
   # other consts
   AutobiographerMinBioLength = 10
 
 
   module Queries
+    PayingItForward = <<SQL
+    SELECT pa.user_id, min(post_id) post_id, min(pa.created_at) granted_at
+    FROM post_actions pa
+    JOIN posts p on p.id = pa.post_id
+    JOIN topics t on t.id = p.topic_id
+    WHERE p.deleted_at IS NULL AND
+          t.deleted_at IS NULL AND
+          t.visible AND
+          post_action_type_id = 2
+    GROUP BY pa.user_id
+SQL
 
     Editor = <<SQL
     SELECT p.user_id, min(p.id) post_id, min(p.created_at) granted_at

config/locales/client.en.yml

@@ -1977,3 +1977,6 @@ en:
         great_post:
           name: Great Post
           description: Received 50 likes on a post. This badge can be granted multiple times.
+        paying_it_forward:
+          name: Paying It Forward
+          description: Liked a post

db/fixtures/006_badges.rb

@@ -15,6 +15,15 @@ trust_level_badges.each do |spec|
   end
 end
 
+Badge.seed do |b|
+  b.id = Badge::PayingItForward
+  b.name = "Paying It Forward"
+  b.badge_type_id = BadgeType::Bronze
+  b.multiple_grant = false
+  b.target_posts = true
+  b.query = Badge::Queries::PayingItForward
+end
+
 Badge.seed do |b|
   b.id = Badge::Welcome
   b.name = "Welcome"

spec/services/badge_granter_spec.rb

@@ -20,10 +20,15 @@ describe BadgeGranter do
 
       UserBadge.destroy_all
       BadgeGranter.backfill(Badge.find(Badge::Welcome))
+      BadgeGranter.backfill(Badge.find(Badge::PayingItForward))
 
-      b = UserBadge.first
-      b.user_id.should == post.user_id
+      b = UserBadge.find_by(user_id: post.user_id)
       b.post_id.should == post.id
+      b.badge_id = Badge::Welcome
+
+      b = UserBadge.find_by(user_id: user2.id)
+      b.post_id.should == post.id
+      b.badge_id = Badge::PayingItForward
     end
 
     it 'should grant missing badges' do