FIX: Use a logging table for daily likes given. Use it for badges.

db/migrate/20160317174357_create_given_daily_likes.rb

@@ -0,0 +1,34 @@
+class CreateGivenDailyLikes < ActiveRecord::Migration
+  def up
+    create_table :given_daily_likes, id: false, force: true do |t|
+      t.integer :user_id, null: false
+      t.integer :likes_given, null: false
+      t.date    :given_date, null: false
+      t.boolean :limit_reached, null: false, default: false
+    end
+    add_index :given_daily_likes, [:user_id, :given_date], unique: true
+    add_index :given_daily_likes, [:limit_reached, :user_id]
+
+    max_likes_rows = execute("SELECT value FROM site_settings WHERE name = 'max_likes_per_day'")
+    if max_likes_rows && max_likes_rows.cmd_tuples > 0
+      max_likes = max_likes_rows[0]['value'].to_i
+    end
+    max_likes ||= 50
+
+    execute "INSERT INTO given_daily_likes (user_id, likes_given, limit_reached, given_date)
+             SELECT pa.user_id,
+                    COUNT(*),
+                    CASE WHEN COUNT(*) >= #{max_likes} THEN true
+                    ELSE false
+                    END,
+                    pa.created_at::date
+             FROM post_actions AS pa
+             WHERE pa.post_action_type_id = 2
+               AND pa.deleted_at IS NULL
+             GROUP BY pa.user_id, pa.created_at::date"
+  end
+
+  def down
+    drop_table :given_daily_likes
+  end
+end