Gab Social. All are welcome.

app/models/status.rb

@@ -0,0 +1,538 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: statuses
+#
+#  id                     :bigint(8)        not null, primary key
+#  uri                    :string
+#  text                   :text             default(""), not null
+#  created_at             :datetime         not null
+#  updated_at             :datetime         not null
+#  in_reply_to_id         :bigint(8)
+#  reblog_of_id           :bigint(8)
+#  url                    :string
+#  sensitive              :boolean          default(FALSE), not null
+#  visibility             :integer          default("public"), not null
+#  spoiler_text           :text             default(""), not null
+#  reply                  :boolean          default(FALSE), not null
+#  language               :string
+#  conversation_id        :bigint(8)
+#  local                  :boolean
+#  account_id             :bigint(8)        not null
+#  application_id         :bigint(8)
+#  in_reply_to_account_id :bigint(8)
+#  poll_id                :bigint(8)
+#  group_id               :integer
+#
+
+class Status < ApplicationRecord
+  before_destroy :unlink_from_conversations
+
+  include Paginable
+  include Streamable
+  include Cacheable
+  include StatusThreadingConcern
+
+  # If `override_timestamps` is set at creation time, Snowflake ID creation
+  # will be based on current time instead of `created_at`
+  attr_accessor :override_timestamps
+
+  update_index('statuses#status', :proper) if Chewy.enabled?
+
+  enum visibility: [:public, :unlisted, :private, :direct, :limited], _suffix: :visibility
+
+  belongs_to :application, class_name: 'Doorkeeper::Application', optional: true
+
+  belongs_to :account, inverse_of: :statuses
+  belongs_to :in_reply_to_account, foreign_key: 'in_reply_to_account_id', class_name: 'Account', optional: true
+  belongs_to :conversation, optional: true
+  belongs_to :preloadable_poll, class_name: 'Poll', foreign_key: 'poll_id', optional: true
+  belongs_to :group, optional: true
+
+  belongs_to :thread, foreign_key: 'in_reply_to_id', class_name: 'Status', inverse_of: :replies, optional: true
+  belongs_to :reblog, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblogs, optional: true
+
+  has_many :favourites, inverse_of: :status, dependent: :destroy
+  has_many :reblogs, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblog, dependent: :destroy
+  has_many :replies, foreign_key: 'in_reply_to_id', class_name: 'Status', inverse_of: :thread
+  has_many :mentions, dependent: :destroy, inverse_of: :status
+  has_many :active_mentions, -> { active }, class_name: 'Mention', inverse_of: :status
+  has_many :media_attachments, dependent: :nullify
+
+  has_and_belongs_to_many :tags
+  has_and_belongs_to_many :preview_cards
+
+  has_one :notification, as: :activity, dependent: :destroy
+  has_one :stream_entry, as: :activity, inverse_of: :status
+  has_one :status_stat, inverse_of: :status
+  has_one :poll, inverse_of: :status, dependent: :destroy
+
+  validates :uri, uniqueness: true, presence: true, unless: :local?
+  validates :text, presence: true, unless: -> { with_media? || reblog? }
+  validates_with StatusLengthValidator
+  validates_with DisallowedHashtagsValidator
+  validates :reblog, uniqueness: { scope: :account }, if: :reblog?
+  validates :visibility, exclusion: { in: %w(direct limited) }, if: :reblog?
+
+  accepts_nested_attributes_for :poll
+
+  default_scope { recent }
+
+  scope :recent, -> { reorder(id: :desc) }
+  scope :remote, -> { where(local: false).or(where.not(uri: nil)) }
+  scope :local,  -> { where(local: true).or(where(uri: nil)) }
+
+  scope :without_replies, -> { where('statuses.reply = FALSE OR statuses.in_reply_to_account_id = statuses.account_id') }
+  scope :without_reblogs, -> { where('statuses.reblog_of_id IS NULL') }
+  scope :with_public_visibility, -> { where(visibility: :public) }
+  scope :tagged_with, ->(tag) { joins(:statuses_tags).where(statuses_tags: { tag_id: tag }) }
+  scope :excluding_silenced_accounts, -> { left_outer_joins(:account).where(accounts: { silenced_at: nil }) }
+  scope :including_silenced_accounts, -> { left_outer_joins(:account).where.not(accounts: { silenced_at: nil }) }
+  scope :not_excluded_by_account, ->(account) { where.not(account_id: account.excluded_from_timeline_account_ids) }
+  scope :not_domain_blocked_by_account, ->(account) { account.excluded_from_timeline_domains.blank? ? left_outer_joins(:account) : left_outer_joins(:account).where('accounts.domain IS NULL OR accounts.domain NOT IN (?)', account.excluded_from_timeline_domains) }
+  scope :tagged_with_all, ->(tags) {
+    Array(tags).map(&:id).map(&:to_i).reduce(self) do |result, id|
+      result.joins("INNER JOIN statuses_tags t#{id} ON t#{id}.status_id = statuses.id AND t#{id}.tag_id = #{id}")
+    end
+  }
+  scope :tagged_with_none, ->(tags) {
+    Array(tags).map(&:id).map(&:to_i).reduce(self) do |result, id|
+      result.joins("LEFT OUTER JOIN statuses_tags t#{id} ON t#{id}.status_id = statuses.id AND t#{id}.tag_id = #{id}")
+            .where("t#{id}.tag_id IS NULL")
+    end
+  }
+
+  cache_associated :application,
+                   :media_attachments,
+                   :conversation,
+                   :status_stat,
+                   :tags,
+                   :preview_cards,
+                   :stream_entry,
+                   :preloadable_poll,
+                   account: :account_stat,
+                   active_mentions: { account: :account_stat },
+                   reblog: [
+                     :application,
+                     :stream_entry,
+                     :tags,
+                     :preview_cards,
+                     :media_attachments,
+                     :conversation,
+                     :status_stat,
+                     :preloadable_poll,
+                     account: :account_stat,
+                     active_mentions: { account: :account_stat },
+                   ],
+                   thread: { account: :account_stat }
+
+  delegate :domain, to: :account, prefix: true
+
+  REAL_TIME_WINDOW = 6.hours
+
+  def searchable_by(preloaded = nil)
+    ids = [account_id]
+
+    if preloaded.nil?
+      ids += mentions.pluck(:account_id)
+      ids += favourites.pluck(:account_id)
+      ids += reblogs.pluck(:account_id)
+    else
+      ids += preloaded.mentions[id] || []
+      ids += preloaded.favourites[id] || []
+      ids += preloaded.reblogs[id] || []
+    end
+
+    ids.uniq
+  end
+
+  def reply?
+    !in_reply_to_id.nil? || attributes['reply']
+  end
+
+  def local?
+    attributes['local'] || uri.nil?
+  end
+
+  def reblog?
+    !reblog_of_id.nil?
+  end
+
+  def within_realtime_window?
+    created_at >= REAL_TIME_WINDOW.ago
+  end
+
+  def verb
+    if destroyed?
+      :delete
+    else
+      reblog? ? :share : :post
+    end
+  end
+
+  def object_type
+    reply? ? :comment : :note
+  end
+
+  def proper
+    reblog? ? reblog : self
+  end
+
+  def content
+    proper.text
+  end
+
+  def target
+    reblog
+  end
+
+  def preview_card
+    preview_cards.first
+  end
+
+  def title
+    if destroyed?
+      "#{account.acct} deleted status"
+    else
+      reblog? ? "#{account.acct} shared a status by #{reblog.account.acct}" : "New status by #{account.acct}"
+    end
+  end
+
+  def hidden?
+    private_visibility? || direct_visibility? || limited_visibility?
+  end
+
+  def distributable?
+    public_visibility? || unlisted_visibility?
+  end
+
+  def with_media?
+    media_attachments.any?
+  end
+
+  def non_sensitive_with_media?
+    !sensitive? && with_media?
+  end
+
+  def emojis
+    return @emojis if defined?(@emojis)
+
+    fields  = [spoiler_text, text]
+    fields += preloadable_poll.options unless preloadable_poll.nil?
+
+    @emojis = CustomEmoji.from_text(fields.join(' '), account.domain)
+  end
+
+  def mark_for_mass_destruction!
+    @marked_for_mass_destruction = true
+  end
+
+  def marked_for_mass_destruction?
+    @marked_for_mass_destruction
+  end
+
+  def replies_count
+    status_stat&.replies_count || 0
+  end
+
+  def reblogs_count
+    status_stat&.reblogs_count || 0
+  end
+
+  def favourites_count
+    status_stat&.favourites_count || 0
+  end
+
+  def increment_count!(key)
+    update_status_stat!(key => public_send(key) + 1)
+  end
+
+  def decrement_count!(key)
+    update_status_stat!(key => [public_send(key) - 1, 0].max)
+  end
+
+  after_create_commit  :increment_counter_caches
+  after_destroy_commit :decrement_counter_caches
+
+  after_create_commit :store_uri, if: :local?
+  after_create_commit :update_statistics, if: :local?
+
+  around_create GabSocial::Snowflake::Callbacks
+
+  before_validation :prepare_contents, if: :local?
+  before_validation :set_reblog
+  before_validation :set_visibility
+  before_validation :set_conversation
+  before_validation :set_group_id
+  before_validation :set_local
+
+  after_create :set_poll_id
+
+  class << self
+    def selectable_visibilities
+      visibilities.keys - %w(direct limited)
+    end
+
+    def in_chosen_languages(account)
+      where(language: nil).or where(language: account.chosen_languages)
+    end
+
+    def as_home_timeline(account)
+      where(account: [account] + account.following).where(visibility: [:public, :unlisted, :private])
+    end
+
+    def as_group_timeline(group)
+      where(group: group)
+    end
+
+    def as_direct_timeline(account, limit = 20, max_id = nil, since_id = nil, cache_ids = false)
+      # direct timeline is mix of direct message from_me and to_me.
+      # 2 queries are executed with pagination.
+      # constant expression using arel_table is required for partial index
+
+      # _from_me part does not require any timeline filters
+      query_from_me = where(account_id: account.id)
+                      .where(Status.arel_table[:visibility].eq(3))
+                      .limit(limit)
+                      .order('statuses.id DESC')
+
+      # _to_me part requires mute and block filter.
+      # FIXME: may we check mutes.hide_notifications?
+      query_to_me = Status
+                    .joins(:mentions)
+                    .merge(Mention.where(account_id: account.id))
+                    .where(Status.arel_table[:visibility].eq(3))
+                    .limit(limit)
+                    .order('mentions.status_id DESC')
+                    .not_excluded_by_account(account)
+
+      if max_id.present?
+        query_from_me = query_from_me.where('statuses.id < ?', max_id)
+        query_to_me = query_to_me.where('mentions.status_id < ?', max_id)
+      end
+
+      if since_id.present?
+        query_from_me = query_from_me.where('statuses.id > ?', since_id)
+        query_to_me = query_to_me.where('mentions.status_id > ?', since_id)
+      end
+
+      if cache_ids
+        # returns array of cache_ids object that have id and updated_at
+        (query_from_me.cache_ids.to_a + query_to_me.cache_ids.to_a).uniq(&:id).sort_by(&:id).reverse.take(limit)
+      else
+        # returns ActiveRecord.Relation
+        items = (query_from_me.select(:id).to_a + query_to_me.select(:id).to_a).uniq(&:id).sort_by(&:id).reverse.take(limit)
+        Status.where(id: items.map(&:id))
+      end
+    end
+
+    def as_public_timeline(account = nil, local_only = false)
+      query = timeline_scope(local_only).without_replies
+
+      apply_timeline_filters(query, account, local_only)
+    end
+
+    def as_tag_timeline(tag, account = nil, local_only = false)
+      query = timeline_scope(local_only).tagged_with(tag)
+
+      apply_timeline_filters(query, account, local_only)
+    end
+
+    def as_outbox_timeline(account)
+      where(account: account, visibility: :public)
+    end
+
+    def favourites_map(status_ids, account_id)
+      Favourite.select('status_id').where(status_id: status_ids).where(account_id: account_id).each_with_object({}) { |f, h| h[f.status_id] = true }
+    end
+
+    def reblogs_map(status_ids, account_id)
+      select('reblog_of_id').where(reblog_of_id: status_ids).where(account_id: account_id).reorder(nil).each_with_object({}) { |s, h| h[s.reblog_of_id] = true }
+    end
+
+    def mutes_map(conversation_ids, account_id)
+      ConversationMute.select('conversation_id').where(conversation_id: conversation_ids).where(account_id: account_id).each_with_object({}) { |m, h| h[m.conversation_id] = true }
+    end
+
+    def pins_map(status_ids, account_id)
+      StatusPin.select('status_id').where(status_id: status_ids).where(account_id: account_id).each_with_object({}) { |p, h| h[p.status_id] = true }
+    end
+
+    def reload_stale_associations!(cached_items)
+      account_ids = []
+
+      cached_items.each do |item|
+        account_ids << item.account_id
+        account_ids << item.reblog.account_id if item.reblog?
+      end
+
+      account_ids.uniq!
+
+      return if account_ids.empty?
+
+      accounts = Account.where(id: account_ids).includes(:account_stat).each_with_object({}) { |a, h| h[a.id] = a }
+
+      cached_items.each do |item|
+        item.account = accounts[item.account_id]
+        item.reblog.account = accounts[item.reblog.account_id] if item.reblog?
+      end
+    end
+
+    def permitted_for(target_account, account)
+      visibility = [:public, :unlisted]
+
+      if account.nil?
+        where(visibility: visibility)
+      elsif target_account.blocking?(account) # get rid of blocked peeps
+        none
+      elsif account.id == target_account.id # author can see own stuff
+        all
+      else
+        # followers can see followers-only stuff, but also things they are mentioned in.
+        # non-followers can see everything that isn't private/direct, but can see stuff they are mentioned in.
+        visibility.push(:private) if account.following?(target_account)
+
+        scope = left_outer_joins(:reblog)
+
+        scope.where(visibility: visibility)
+             .or(scope.where(id: account.mentions.select(:status_id)))
+             .merge(scope.where(reblog_of_id: nil).or(scope.where.not(reblogs_statuses: { account_id: account.excluded_from_timeline_account_ids })))
+      end
+    end
+
+    private
+
+    def timeline_scope(local_only = false)
+      starting_scope = local_only ? Status.local : Status
+      starting_scope
+        .with_public_visibility
+        .without_reblogs
+    end
+
+    def apply_timeline_filters(query, account, local_only)
+      if account.nil?
+        filter_timeline_default(query)
+      else
+        filter_timeline_for_account(query, account, local_only)
+      end
+    end
+
+    def filter_timeline_for_account(query, account, local_only)
+      query = query.not_excluded_by_account(account)
+      query = query.not_domain_blocked_by_account(account) unless local_only
+      query = query.in_chosen_languages(account) if account.chosen_languages.present?
+      query.merge(account_silencing_filter(account))
+    end
+
+    def filter_timeline_default(query)
+      query.excluding_silenced_accounts
+    end
+
+    def account_silencing_filter(account)
+      if account.silenced?
+        including_myself = left_outer_joins(:account).where(account_id: account.id).references(:accounts)
+        excluding_silenced_accounts.or(including_myself)
+      else
+        excluding_silenced_accounts
+      end
+    end
+  end
+
+  private
+
+  def update_status_stat!(attrs)
+    return if marked_for_destruction? || destroyed?
+
+    record = status_stat || build_status_stat
+    record.update(attrs)
+  end
+
+  def store_uri
+    update_column(:uri, ActivityPub::TagManager.instance.uri_for(self)) if uri.nil?
+  end
+
+  def prepare_contents
+    text&.strip!
+    spoiler_text&.strip!
+  end
+
+  def set_reblog
+    self.reblog = reblog.reblog if reblog? && reblog.reblog?
+  end
+
+  def set_poll_id
+    update_column(:poll_id, poll.id) unless poll.nil?
+  end
+
+  def set_visibility
+    self.visibility = reblog.visibility if reblog? && visibility.nil?
+    self.visibility = (account.locked? ? :private : :public) if visibility.nil?
+    self.sensitive  = false if sensitive.nil?
+  end
+
+  def set_group_id
+    self.group_id = thread.group_id if thread&.group_id?
+
+    if reply? && !thread.nil?
+      replied_status = Status.find(in_reply_to_id)
+      self.group_id = replied_status.group_id
+    end
+  end
+
+  def set_conversation
+    self.thread = thread.reblog if thread&.reblog?
+
+    self.reply = !(in_reply_to_id.nil? && thread.nil?) unless reply
+
+    if reply? && !thread.nil?
+      self.in_reply_to_account_id = carried_over_reply_to_account_id
+      self.conversation_id        = thread.conversation_id if conversation_id.nil?
+    elsif conversation_id.nil?
+      self.conversation = Conversation.new
+    end
+  end
+
+  def carried_over_reply_to_account_id
+    if thread.account_id == account_id && thread.reply?
+      thread.in_reply_to_account_id
+    else
+      thread.account_id
+    end
+  end
+
+  def set_local
+    self.local = account.local?
+  end
+
+  def update_statistics
+    return unless public_visibility? || unlisted_visibility?
+    ActivityTracker.increment('activity:statuses:local')
+  end
+
+  def increment_counter_caches
+    return if direct_visibility?
+
+    account&.increment_count!(:statuses_count)
+    reblog&.increment_count!(:reblogs_count) if reblog? && (public_visibility? || unlisted_visibility?)
+    thread&.increment_count!(:replies_count) if in_reply_to_id.present? && (public_visibility? || unlisted_visibility?)
+  end
+
+  def decrement_counter_caches
+    return if direct_visibility? || marked_for_mass_destruction?
+
+    account&.decrement_count!(:statuses_count)
+    reblog&.decrement_count!(:reblogs_count) if reblog? && (public_visibility? || unlisted_visibility?)
+    thread&.decrement_count!(:replies_count) if in_reply_to_id.present? && (public_visibility? || unlisted_visibility?)
+  end
+
+  def unlink_from_conversations
+    return unless direct_visibility?
+
+    mentioned_accounts = mentions.includes(:account).map(&:account)
+    inbox_owners       = mentioned_accounts.select(&:local?) + (account.local? ? [account] : [])
+
+    inbox_owners.each do |inbox_owner|
+      AccountConversation.remove_status(inbox_owner, self)
+    end
+  end
+end