mastodon/db/migrate/20181024224956_migrate_acco...

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# frozen_string_literal: true
require_relative '../../lib/mastodon/migration_warning'
class MigrateAccountConversations < ActiveRecord::Migration[5.2]
include Mastodon::MigrationWarning
disable_ddl_transaction!
class MigrationAccount < ApplicationRecord
self.table_name = :accounts
has_many :mentions, inverse_of: :account, dependent: :destroy, class_name: 'MigrationMention', foreign_key: :account_id
end
class MigrationConversation < ApplicationRecord
self.table_name = :conversations
end
class MigrationStatus < ApplicationRecord
self.table_name = :statuses
belongs_to :account, class_name: 'MigrationAccount'
has_many :mentions, dependent: :destroy, inverse_of: :status, class_name: 'MigrationMention', foreign_key: :status_id
scope :local, -> { where(local: true).or(where(uri: nil)) }
enum visibility: { public: 0, unlisted: 1, private: 2, direct: 3, limited: 4 }, _suffix: :visibility
has_many :active_mentions, -> { active }, class_name: 'MigrationMention', inverse_of: :status, foreign_key: :status_id
end
class MigrationMention < ApplicationRecord
self.table_name = :mentions
belongs_to :account, inverse_of: :mentions, class_name: 'MigrationAccount'
belongs_to :status, -> { unscope(where: :deleted_at) }, class_name: 'MigrationStatus'
scope :active, -> { where(silent: false) }
delegate(
:username,
:acct,
to: :account,
prefix: true
)
end
class MigrationNotification < ApplicationRecord
self.table_name = :notifications
belongs_to :account, optional: true, class_name: 'MigrationAccount'
belongs_to :activity, polymorphic: true, optional: true
belongs_to :status, foreign_key: 'activity_id', optional: true, class_name: 'MigrationStatus'
belongs_to :mention, foreign_key: 'activity_id', optional: true, class_name: 'MigrationMention'
def target_status
mention&.status
end
end
class MigrationAccountConversation < ApplicationRecord
self.table_name = :account_conversations
belongs_to :account, class_name: 'MigrationAccount'
belongs_to :conversation, class_name: 'MigrationConversation'
belongs_to :last_status, -> { unscope(where: :deleted_at) }, class_name: 'MigrationStatus'
before_validation :set_last_status
class << self
def add_status(recipient, status)
conversation = find_or_initialize_by(account: recipient, conversation_id: status.conversation_id, participant_account_ids: participants_from_status(recipient, status))
return conversation if conversation.status_ids.include?(status.id)
conversation.status_ids << status.id
conversation.unread = status.account_id != recipient.id
conversation.save
conversation
rescue ActiveRecord::StaleObjectError
retry
end
private
def participants_from_status(recipient, status)
((status.active_mentions.pluck(:account_id) + [status.account_id]).uniq - [recipient.id]).sort
end
end
private
def set_last_status
self.status_ids = status_ids.sort
self.last_status_id = status_ids.last
end
end
def up
migration_duration_warning
migrated = 0
last_time = Time.zone.now
local_direct_statuses.includes(:account, mentions: :account).find_each do |status|
MigrationAccountConversation.add_status(status.account, status)
migrated += 1
if Time.zone.now - last_time > 1
say_progress(migrated)
last_time = Time.zone.now
end
end
notifications_about_direct_statuses.includes(:account, mention: { status: [:account, { mentions: :account }] }).find_each do |notification|
MigrationAccountConversation.add_status(notification.account, notification.target_status)
migrated += 1
if Time.zone.now - last_time > 1
say_progress(migrated)
last_time = Time.zone.now
end
end
end
def down; end
private
def say_progress(migrated)
say "Migrated #{migrated} rows", true
end
def local_direct_statuses
MigrationStatus.unscoped.local.where(visibility: :direct)
end
def notifications_about_direct_statuses
MigrationNotification.joins('INNER JOIN mentions ON mentions.id = notifications.activity_id INNER JOIN statuses ON statuses.id = mentions.status_id').where(activity_type: 'Mention', statuses: { visibility: :direct })
end
end