* Re-add follow recommendations API
    GET /api/v1/suggestions
Removed in 8efa081f210d72ed450c39ac4cde0fd84fb3d3fb due to Neo4J
dependency. The algorithm uses triadic closures, takes into account
suspensions, blocks, mutes, domain blocks, excludes locked and moved
accounts, and prefers more recently updated accounts.
* Track interactions with people you don't follow
Replying to, favouriting and reblogging someone you're not following
will make them show up in follow recommendations. The interactions
have different weights:
- Replying is 1
- Favouriting is 10 (decidedly positive interaction, but private)
- Reblogging is 20
Following them, muting or blocking will remove them from the list,
obviously.
* Remove triadic closures, ensure potential friendships are trimmed
		
	
			
		
			
				
	
	
		
			419 lines
		
	
	
		
			13 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
			
		
		
	
	
			419 lines
		
	
	
		
			13 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
| # frozen_string_literal: true
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| # == Schema Information
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| #
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| # Table name: accounts
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| #
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| #  id                      :bigint(8)        not null, primary key
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| #  username                :string           default(""), not null
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| #  domain                  :string
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| #  secret                  :string           default(""), not null
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| #  private_key             :text
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| #  public_key              :text             default(""), not null
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| #  remote_url              :string           default(""), not null
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| #  salmon_url              :string           default(""), not null
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| #  hub_url                 :string           default(""), not null
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| #  created_at              :datetime         not null
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| #  updated_at              :datetime         not null
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| #  note                    :text             default(""), not null
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| #  display_name            :string           default(""), not null
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| #  uri                     :string           default(""), not null
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| #  url                     :string
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| #  avatar_file_name        :string
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| #  avatar_content_type     :string
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| #  avatar_file_size        :integer
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| #  avatar_updated_at       :datetime
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| #  header_file_name        :string
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| #  header_content_type     :string
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| #  header_file_size        :integer
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| #  header_updated_at       :datetime
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| #  avatar_remote_url       :string
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| #  subscription_expires_at :datetime
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| #  silenced                :boolean          default(FALSE), not null
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| #  suspended               :boolean          default(FALSE), not null
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| #  locked                  :boolean          default(FALSE), not null
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| #  header_remote_url       :string           default(""), not null
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| #  statuses_count          :integer          default(0), not null
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| #  followers_count         :integer          default(0), not null
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| #  following_count         :integer          default(0), not null
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| #  last_webfingered_at     :datetime
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| #  inbox_url               :string           default(""), not null
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| #  outbox_url              :string           default(""), not null
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| #  shared_inbox_url        :string           default(""), not null
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| #  followers_url           :string           default(""), not null
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| #  protocol                :integer          default("ostatus"), not null
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| #  memorial                :boolean          default(FALSE), not null
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| #  moved_to_account_id     :bigint(8)
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| #  featured_collection_url :string
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| #  fields                  :jsonb
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| #  actor_type              :string
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| #
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| 
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| class Account < ApplicationRecord
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|   USERNAME_RE = /[a-z0-9_]+([a-z0-9_\.]+[a-z0-9_]+)?/i
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|   MENTION_RE  = /(?<=^|[^\/[:word:]])@((#{USERNAME_RE})(?:@[a-z0-9\.\-]+[a-z0-9]+)?)/i
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| 
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|   include AccountAvatar
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|   include AccountFinderConcern
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|   include AccountHeader
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|   include AccountInteractions
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|   include Attachmentable
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|   include Paginable
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| 
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|   enum protocol: [:ostatus, :activitypub]
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| 
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|   # Local users
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|   has_one :user, inverse_of: :account
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| 
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|   validates :username, presence: true
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| 
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|   # Remote user validations
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|   validates :username, uniqueness: { scope: :domain, case_sensitive: true }, if: -> { !local? && will_save_change_to_username? }
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| 
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|   # Local user validations
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|   validates :username, format: { with: /\A[a-z0-9_]+\z/i }, length: { maximum: 30 }, if: -> { local? && will_save_change_to_username? }
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|   validates_with UniqueUsernameValidator, if: -> { local? && will_save_change_to_username? }
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|   validates_with UnreservedUsernameValidator, if: -> { local? && will_save_change_to_username? }
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|   validates :display_name, length: { maximum: 30 }, if: -> { local? && will_save_change_to_display_name? }
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|   validates :note, length: { maximum: 160 }, if: -> { local? && will_save_change_to_note? }
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|   validates :fields, length: { maximum: 4 }, if: -> { local? && will_save_change_to_fields? }
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| 
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|   # Timelines
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|   has_many :stream_entries, inverse_of: :account, dependent: :destroy
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|   has_many :statuses, inverse_of: :account, dependent: :destroy
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|   has_many :favourites, inverse_of: :account, dependent: :destroy
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|   has_many :mentions, inverse_of: :account, dependent: :destroy
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|   has_many :notifications, inverse_of: :account, dependent: :destroy
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| 
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|   # Pinned statuses
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|   has_many :status_pins, inverse_of: :account, dependent: :destroy
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|   has_many :pinned_statuses, -> { reorder('status_pins.created_at DESC') }, through: :status_pins, class_name: 'Status', source: :status
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| 
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|   # Media
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|   has_many :media_attachments, dependent: :destroy
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| 
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|   # PuSH subscriptions
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|   has_many :subscriptions, dependent: :destroy
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| 
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|   # Report relationships
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|   has_many :reports
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|   has_many :targeted_reports, class_name: 'Report', foreign_key: :target_account_id
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| 
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|   has_many :report_notes, dependent: :destroy
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|   has_many :custom_filters, inverse_of: :account, dependent: :destroy
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| 
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|   # Moderation notes
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|   has_many :account_moderation_notes, dependent: :destroy
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|   has_many :targeted_moderation_notes, class_name: 'AccountModerationNote', foreign_key: :target_account_id, dependent: :destroy
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| 
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|   # Lists
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|   has_many :list_accounts, inverse_of: :account, dependent: :destroy
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|   has_many :lists, through: :list_accounts
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| 
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|   # Account migrations
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|   belongs_to :moved_to_account, class_name: 'Account', optional: true
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| 
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|   scope :remote, -> { where.not(domain: nil) }
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|   scope :local, -> { where(domain: nil) }
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|   scope :without_followers, -> { where(followers_count: 0) }
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|   scope :with_followers, -> { where('followers_count > 0') }
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|   scope :expiring, ->(time) { remote.where.not(subscription_expires_at: nil).where('subscription_expires_at < ?', time) }
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|   scope :partitioned, -> { order(Arel.sql('row_number() over (partition by domain)')) }
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|   scope :silenced, -> { where(silenced: true) }
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|   scope :suspended, -> { where(suspended: true) }
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|   scope :without_suspended, -> { where(suspended: false) }
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|   scope :recent, -> { reorder(id: :desc) }
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|   scope :alphabetic, -> { order(domain: :asc, username: :asc) }
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|   scope :by_domain_accounts, -> { group(:domain).select(:domain, 'COUNT(*) AS accounts_count').order('accounts_count desc') }
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|   scope :matches_username, ->(value) { where(arel_table[:username].matches("#{value}%")) }
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|   scope :matches_display_name, ->(value) { where(arel_table[:display_name].matches("#{value}%")) }
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|   scope :matches_domain, ->(value) { where(arel_table[:domain].matches("%#{value}%")) }
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|   scope :searchable, -> { where(suspended: false).where(moved_to_account_id: nil) }
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| 
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|   delegate :email,
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|            :unconfirmed_email,
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|            :current_sign_in_ip,
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|            :current_sign_in_at,
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|            :confirmed?,
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|            :admin?,
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|            :moderator?,
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|            :staff?,
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|            :locale,
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|            :hides_network?,
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|            to: :user,
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|            prefix: true,
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|            allow_nil: true
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| 
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|   delegate :chosen_languages, to: :user, prefix: false, allow_nil: true
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| 
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|   def local?
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|     domain.nil?
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|   end
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| 
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|   def moved?
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|     moved_to_account_id.present?
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|   end
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| 
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|   def bot?
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|     %w(Application Service).include? actor_type
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|   end
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| 
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|   alias bot bot?
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| 
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|   def bot=(val)
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|     self.actor_type = ActiveModel::Type::Boolean.new.cast(val) ? 'Service' : 'Person'
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|   end
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| 
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|   def acct
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|     local? ? username : "#{username}@#{domain}"
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|   end
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| 
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|   def local_username_and_domain
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|     "#{username}@#{Rails.configuration.x.local_domain}"
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|   end
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| 
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|   def to_webfinger_s
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|     "acct:#{local_username_and_domain}"
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|   end
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| 
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|   def subscribed?
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|     subscription_expires_at.present?
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|   end
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| 
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|   def possibly_stale?
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|     last_webfingered_at.nil? || last_webfingered_at <= 1.day.ago
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|   end
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| 
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|   def refresh!
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|     return if local?
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|     ResolveAccountService.new.call(acct)
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|   end
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| 
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|   def unsuspend!
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|     transaction do
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|       user&.enable! if local?
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|       update!(suspended: false)
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|     end
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|   end
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| 
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|   def memorialize!
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|     transaction do
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|       user&.disable! if local?
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|       update!(memorial: true)
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|     end
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|   end
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| 
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|   def keypair
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|     @keypair ||= OpenSSL::PKey::RSA.new(private_key || public_key)
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|   end
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| 
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|   def fields
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|     (self[:fields] || []).map { |f| Field.new(self, f) }
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|   end
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| 
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|   def fields_attributes=(attributes)
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|     fields = []
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| 
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|     if attributes.is_a?(Hash)
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|       attributes.each_value do |attr|
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|         next if attr[:name].blank?
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|         fields << attr
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|       end
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|     end
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| 
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|     self[:fields] = fields
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|   end
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| 
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|   def build_fields
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|     return if fields.size >= 4
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| 
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|     raw_fields = self[:fields] || []
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|     add_fields = 4 - raw_fields.size
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|     add_fields.times { raw_fields << { name: '', value: '' } }
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|     self.fields = raw_fields
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|   end
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| 
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|   def magic_key
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|     modulus, exponent = [keypair.public_key.n, keypair.public_key.e].map do |component|
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|       result = []
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| 
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|       until component.zero?
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|         result << [component % 256].pack('C')
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|         component >>= 8
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|       end
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| 
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|       result.reverse.join
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|     end
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| 
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|     (['RSA'] + [modulus, exponent].map { |n| Base64.urlsafe_encode64(n) }).join('.')
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|   end
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| 
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|   def subscription(webhook_url)
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|     @subscription ||= OStatus2::Subscription.new(remote_url, secret: secret, webhook: webhook_url, hub: hub_url)
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|   end
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| 
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|   def save_with_optional_media!
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|     save!
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|   rescue ActiveRecord::RecordInvalid
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|     self.avatar              = nil
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|     self.header              = nil
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|     self[:avatar_remote_url] = ''
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|     self[:header_remote_url] = ''
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|     save!
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|   end
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| 
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|   def object_type
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|     :person
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|   end
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| 
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|   def to_param
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|     username
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|   end
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| 
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|   def excluded_from_timeline_account_ids
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|     Rails.cache.fetch("exclude_account_ids_for:#{id}") { blocking.pluck(:target_account_id) + blocked_by.pluck(:account_id) + muting.pluck(:target_account_id) }
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|   end
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| 
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|   def excluded_from_timeline_domains
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|     Rails.cache.fetch("exclude_domains_for:#{id}") { domain_blocks.pluck(:domain) }
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|   end
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| 
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|   def preferred_inbox_url
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|     shared_inbox_url.presence || inbox_url
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|   end
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| 
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|   class Field < ActiveModelSerializers::Model
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|     attributes :name, :value, :account, :errors
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| 
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|     def initialize(account, attr)
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|       @account = account
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|       @name    = attr['name'].strip[0, 255]
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|       @value   = attr['value'].strip[0, 255]
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|       @errors  = {}
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|     end
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| 
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|     def to_h
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|       { name: @name, value: @value }
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|     end
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|   end
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| 
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|   class << self
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|     def readonly_attributes
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|       super - %w(statuses_count following_count followers_count)
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|     end
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| 
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|     def domains
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|       reorder(nil).pluck(Arel.sql('distinct accounts.domain'))
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|     end
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| 
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|     def inboxes
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|       urls = reorder(nil).where(protocol: :activitypub).pluck(Arel.sql("distinct coalesce(nullif(accounts.shared_inbox_url, ''), accounts.inbox_url)"))
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|       DeliveryFailureTracker.filter(urls)
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|     end
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| 
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|     def search_for(terms, limit = 10)
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|       textsearch, query = generate_query_for_search(terms)
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| 
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|       sql = <<-SQL.squish
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|         SELECT
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|           accounts.*,
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|           ts_rank_cd(#{textsearch}, #{query}, 32) AS rank
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|         FROM accounts
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|         WHERE #{query} @@ #{textsearch}
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|           AND accounts.suspended = false
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|           AND accounts.moved_to_account_id IS NULL
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|         ORDER BY rank DESC
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|         LIMIT ?
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|       SQL
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| 
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|       find_by_sql([sql, limit])
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|     end
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| 
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|     def advanced_search_for(terms, account, limit = 10, following = false)
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|       textsearch, query = generate_query_for_search(terms)
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| 
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|       if following
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|         sql = <<-SQL.squish
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|           WITH first_degree AS (
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|             SELECT target_account_id
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|             FROM follows
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|             WHERE account_id = ?
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|           )
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|           SELECT
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|             accounts.*,
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|             (count(f.id) + 1) * ts_rank_cd(#{textsearch}, #{query}, 32) AS rank
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|           FROM accounts
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|           LEFT OUTER JOIN follows AS f ON (accounts.id = f.account_id AND f.target_account_id = ?) OR (accounts.id = f.target_account_id AND f.account_id = ?)
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|           WHERE accounts.id IN (SELECT * FROM first_degree)
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|             AND #{query} @@ #{textsearch}
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|             AND accounts.suspended = false
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|             AND accounts.moved_to_account_id IS NULL
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|           GROUP BY accounts.id
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|           ORDER BY rank DESC
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|           LIMIT ?
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|         SQL
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| 
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|         find_by_sql([sql, account.id, account.id, account.id, limit])
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|       else
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|         sql = <<-SQL.squish
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|           SELECT
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|             accounts.*,
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|             (count(f.id) + 1) * ts_rank_cd(#{textsearch}, #{query}, 32) AS rank
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|           FROM accounts
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|           LEFT OUTER JOIN follows AS f ON (accounts.id = f.account_id AND f.target_account_id = ?) OR (accounts.id = f.target_account_id AND f.account_id = ?)
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|           WHERE #{query} @@ #{textsearch}
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|             AND accounts.suspended = false
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|             AND accounts.moved_to_account_id IS NULL
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|           GROUP BY accounts.id
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|           ORDER BY rank DESC
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|           LIMIT ?
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|         SQL
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| 
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|         find_by_sql([sql, account.id, account.id, limit])
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|       end
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|     end
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| 
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|     private
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| 
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|     def generate_query_for_search(terms)
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|       terms      = Arel.sql(connection.quote(terms.gsub(/['?\\:]/, ' ')))
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|       textsearch = "(setweight(to_tsvector('simple', accounts.display_name), 'A') || setweight(to_tsvector('simple', accounts.username), 'B') || setweight(to_tsvector('simple', coalesce(accounts.domain, '')), 'C'))"
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|       query      = "to_tsquery('simple', ''' ' || #{terms} || ' ''' || ':*')"
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| 
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|       [textsearch, query]
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|     end
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|   end
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| 
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|   def emojis
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|     @emojis ||= CustomEmoji.from_text(emojifiable_text, domain)
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|   end
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| 
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|   before_create :generate_keys
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|   before_validation :normalize_domain
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|   before_validation :prepare_contents, if: :local?
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| 
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|   private
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| 
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|   def prepare_contents
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|     display_name&.strip!
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|     note&.strip!
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|   end
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| 
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|   def generate_keys
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|     return unless local? && !Rails.env.test?
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| 
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|     keypair = OpenSSL::PKey::RSA.new(2048)
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|     self.private_key = keypair.to_pem
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|     self.public_key  = keypair.public_key.to_pem
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|   end
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| 
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|   def normalize_domain
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|     return if local?
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| 
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|     self.domain = TagManager.instance.normalize_domain(domain)
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|   end
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| 
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|   def emojifiable_text
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|     [note, display_name, fields.map(&:value)].join(' ')
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|   end
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| end
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