Add scheduled statuses (#9706)

Fix #340

app/models/scheduled_status.rb

@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: scheduled_statuses
+#
+#  id           :bigint(8)        not null, primary key
+#  account_id   :bigint(8)
+#  scheduled_at :datetime
+#  params       :jsonb
+#
+
+class ScheduledStatus < ApplicationRecord
+  include Paginable
+
+  TOTAL_LIMIT = 300
+  DAILY_LIMIT = 25
+
+  belongs_to :account, inverse_of: :scheduled_statuses
+  has_many :media_attachments, inverse_of: :scheduled_status, dependent: :destroy
+
+  validate :validate_future_date
+  validate :validate_total_limit
+  validate :validate_daily_limit
+
+  private
+
+  def validate_future_date
+    errors.add(:scheduled_at, I18n.t('scheduled_statuses.too_soon')) if scheduled_at.present? && scheduled_at <= Time.now.utc + PostStatusService::MIN_SCHEDULE_OFFSET
+  end
+
+  def validate_total_limit
+    errors.add(:base, I18n.t('scheduled_statuses.over_total_limit', limit: TOTAL_LIMIT)) if account.scheduled_statuses.count >= TOTAL_LIMIT
+  end
+
+  def validate_daily_limit
+    errors.add(:base, I18n.t('scheduled_statuses.over_daily_limit', limit: DAILY_LIMIT)) if account.scheduled_statuses.where('scheduled_at::date = ?::date', scheduled_at).count >= DAILY_LIMIT
+  end
+end