Add: #600 NGルール (#602)

* Wip

* Wip

* Wip: History

* Wip: テストコード作成

* Fix test

* Wip

* Wip

* Wip

* Fix test

* Wip

* Wip

* Wip

* Wip

* なんとか完成、これから動作確認

* spell miss

* Change ng rule timings

* Fix test

* Wip

* Fix test

* Wip

* Fix form

* 表示まわりの改善

app/models/ng_rule.rb

@@ -0,0 +1,114 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: ng_rules
+#
+#  id                              :bigint(8)        not null, primary key
+#  title                           :string           default(""), not null
+#  available                       :boolean          default(TRUE), not null
+#  record_history_also_local       :boolean          default(TRUE), not null
+#  account_domain                  :string           default(""), not null
+#  account_username                :string           default(""), not null
+#  account_display_name            :string           default(""), not null
+#  account_note                    :string           default(""), not null
+#  account_field_name              :string           default(""), not null
+#  account_field_value             :string           default(""), not null
+#  account_avatar_state            :integer          default("optional"), not null
+#  account_header_state            :integer          default("optional"), not null
+#  account_include_local           :boolean          default(TRUE), not null
+#  account_allow_followed_by_local :boolean          default(FALSE), not null
+#  status_spoiler_text             :string           default(""), not null
+#  status_text                     :string           default(""), not null
+#  status_tag                      :string           default(""), not null
+#  status_visibility               :string           default([]), not null, is an Array
+#  status_searchability            :string           default([]), not null, is an Array
+#  status_media_state              :integer          default("optional"), not null
+#  status_sensitive_state          :integer          default("optional"), not null
+#  status_cw_state                 :integer          default("optional"), not null
+#  status_poll_state               :integer          default("optional"), not null
+#  status_quote_state              :integer          default("optional"), not null
+#  status_reply_state              :integer          default("optional"), not null
+#  status_mention_state            :integer          default(0), not null
+#  status_reference_state          :integer          default(0), not null
+#  status_tag_threshold            :integer          default(-1), not null
+#  status_media_threshold          :integer          default(-1), not null
+#  status_poll_threshold           :integer          default(-1), not null
+#  status_mention_threshold        :integer          default(-1), not null
+#  status_allow_follower_mention   :boolean          default(TRUE), not null
+#  status_reference_threshold      :integer          default(-1), not null
+#  reaction_type                   :string           default([]), not null, is an Array
+#  reaction_allow_follower         :boolean          default(TRUE), not null
+#  emoji_reaction_name             :string           default(""), not null
+#  emoji_reaction_origin_domain    :string           default(""), not null
+#  expires_at                      :datetime
+#  created_at                      :datetime         not null
+#  updated_at                      :datetime         not null
+#
+class NgRule < ApplicationRecord
+  include Expireable
+  include Redisable
+
+  has_many :histories, class_name: 'NgRuleHistory', inverse_of: :ng_rule, dependent: :destroy
+
+  enum :account_avatar_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :account_avatar
+  enum :account_header_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :account_header
+  enum :status_sensitive_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :status_sensitive
+  enum :status_cw_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :status_cw
+  enum :status_quote_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :status_quote
+  enum :status_reply_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :status_reply
+  enum :status_media_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :status_media
+  enum :status_poll_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :status_poll
+  enum :status_mention_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :status_mention
+  enum :status_reference_state, { optional: 0, needed: 1, no_needed: 2 }, prefix: :status_reference
+
+  scope :enabled, -> { where(available: true) }
+
+  before_validation :clean_up_arrays
+  before_save :prepare_cache_invalidation!
+  before_destroy :prepare_cache_invalidation!
+  after_commit :invalidate_cache!
+
+  def self.cached_rules
+    active_rules = Rails.cache.fetch('ng_rules') do
+      NgRule.enabled.to_a
+    end
+
+    active_rules.reject { |ng_rule, _| ng_rule.expired? }
+  end
+
+  def expires_in
+    return @expires_in if defined?(@expires_in)
+    return nil if expires_at.nil?
+
+    [30.minutes, 1.hour, 6.hours, 12.hours, 1.day, 1.week, 2.weeks, 1.month, 3.months].find { |expires_in| expires_in.from_now >= expires_at }
+  end
+
+  def copy!
+    dup
+  end
+
+  def hit_count
+    Rails.cache.fetch("ng_rule:hit_count:#{id}", expires_in: 15.minutes) { NgRuleHistory.where(ng_rule_id: id).count }
+  end
+
+  private
+
+  def clean_up_arrays
+    self.status_visibility    = Array(status_visibility).map(&:strip).filter_map(&:presence)
+    self.status_searchability = Array(status_searchability).map(&:strip).filter_map(&:presence)
+    self.reaction_type        = Array(reaction_type).map(&:strip).filter_map(&:presence)
+  end
+
+  def prepare_cache_invalidation!
+    @should_invalidate_cache = true
+  end
+
+  def invalidate_cache!
+    return unless @should_invalidate_cache
+
+    @should_invalidate_cache = false
+
+    Rails.cache.delete('ng_rules')
+  end
+end