Add circle posts history support (#18)

* Wip: make web backend

* Wip: keep statuses if edit circle

* Wip: Add circle history page and record circle posts

* Add circle post to history in web ui when post

* Add test

app/models/circle.rb

@@ -20,6 +20,8 @@ class Circle < ApplicationRecord
 
   has_many :circle_accounts, inverse_of: :circle, dependent: :destroy
   has_many :accounts, through: :circle_accounts
+  has_many :circle_statuses, inverse_of: :circle, dependent: :destroy
+  has_many :statuses, through: :circle_statuses
 
   validates :title, presence: true
 

app/models/circle_status.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: circle_statuses
+#
+#  id         :bigint(8)        not null, primary key
+#  circle_id  :bigint(8)
+#  status_id  :bigint(8)        not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+
+class CircleStatus < ApplicationRecord
+  belongs_to :circle
+  belongs_to :status
+
+  validates :status, uniqueness: { scope: :circle }
+  validate :account_own_status
+
+  private
+
+  def account_own_status
+    errors.add(:status_id, :invalid) unless status.account_id == circle.account_id
+  end
+end

app/models/status.rb

@@ -106,6 +106,7 @@ class Status < ApplicationRecord
   has_one :poll, inverse_of: :status, dependent: :destroy
   has_one :trend, class_name: 'StatusTrend', inverse_of: :status
   has_one :scheduled_expiration_status, inverse_of: :status, dependent: :destroy
+  has_one :circle_status, inverse_of: :status, dependent: :destroy
 
   validates :uri, uniqueness: true, presence: true, unless: :local?
   validates :text, presence: true, unless: -> { with_media? || reblog? }