FEATURE: better email in support

FEATURE: new incoming_email model
FEATURE: infinite scrolling in emails admin
FEATURE: new 'emails:import' rake task

db/migrate/20151109124147_drop_group_managers.rb

@@ -10,6 +10,6 @@ class DropGroupManagers < ActiveRecord::Migration
   end
 
   def down
-    raise ActiveRecord::IrriversableMigration
+    raise ActiveRecord::IrreversibleMigration
   end
 end

db/migrate/20160113160742_create_incoming_emails.rb

@@ -0,0 +1,24 @@
+class CreateIncomingEmails < ActiveRecord::Migration
+  def change
+    create_table :incoming_emails do |t|
+      t.integer :user_id
+      t.integer :topic_id
+      t.integer :post_id
+
+      t.text :raw
+      t.text :error
+
+      t.text :message_id
+      t.text :from_address
+      t.text :to_addresses
+      t.text :cc_addresses
+      t.text :subject
+
+      t.timestamps null: false
+    end
+
+    add_index :incoming_emails, :created_at
+    add_index :incoming_emails, :message_id
+    add_index :incoming_emails, :error
+  end
+end

db/migrate/20160118233631_backfill_incoming_emails.rb

@@ -0,0 +1,28 @@
+class BackfillIncomingEmails < ActiveRecord::Migration
+  def up
+    execute <<-SQL
+      INSERT INTO incoming_emails (post_id, created_at, updated_at, user_id, topic_id, message_id, from_address, to_addresses, subject)
+      SELECT posts.id
+           , posts.created_at
+           , posts.created_at
+           , posts.user_id
+           , posts.topic_id
+           , array_to_string(regexp_matches(posts.raw_email, '^\s*Message-Id: .*<([^>]+)>', 'im'), '')
+           , users.email
+           , array_to_string(regexp_matches(array_to_string(regexp_matches(posts.raw_email, '^to:.+$', 'im'), ''), '[^<\s"''(]+@[^>\s"'')]+'), '')
+           , topics.title
+      FROM posts
+      JOIN topics ON posts.topic_id = topics.id
+      JOIN users ON posts.user_id = users.id
+      WHERE posts.user_id IS NOT NULL
+        AND posts.topic_id IS NOT NULL
+        AND posts.via_email = 't'
+        AND posts.raw_email ~* 'Message-Id'
+      ORDER BY posts.id;
+    SQL
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end