# frozen_string_literal: true # == Schema Information # # Table name: tags # # id :bigint(8) not null, primary key # name :string default(""), not null # created_at :datetime not null # updated_at :datetime not null # usable :boolean # trendable :boolean # listable :boolean # reviewed_at :datetime # requested_review_at :datetime # last_status_at :datetime # max_score :float # max_score_at :datetime # display_name :string # class Tag < ApplicationRecord include Paginable # rubocop:disable Rails/HasAndBelongsToMany has_and_belongs_to_many :statuses has_and_belongs_to_many :accounts # rubocop:enable Rails/HasAndBelongsToMany has_many :passive_relationships, class_name: 'TagFollow', inverse_of: :tag, dependent: :destroy has_many :featured_tags, dependent: :destroy, inverse_of: :tag has_many :followers, through: :passive_relationships, source: :account HASHTAG_SEPARATORS = "_\u00B7\u30FB\u200c" HASHTAG_FIRST_SEQUENCE_CHUNK_ONE = "[[:word:]_][[:word:]#{HASHTAG_SEPARATORS}]*[[:alpha:]#{HASHTAG_SEPARATORS}]" HASHTAG_FIRST_SEQUENCE_CHUNK_TWO = "[[:word:]#{HASHTAG_SEPARATORS}]*[[:word:]_]" HASHTAG_FIRST_SEQUENCE = "(#{HASHTAG_FIRST_SEQUENCE_CHUNK_ONE}#{HASHTAG_FIRST_SEQUENCE_CHUNK_TWO})" HASHTAG_LAST_SEQUENCE = '([[:word:]_]*[[:alpha:]][[:word:]_]*)' HASHTAG_NAME_PAT = "#{HASHTAG_FIRST_SEQUENCE}|#{HASHTAG_LAST_SEQUENCE}" HASHTAG_RE = %r{(?<![=/)\w])#(#{HASHTAG_NAME_PAT})}i HASHTAG_NAME_RE = /\A(#{HASHTAG_NAME_PAT})\z/i HASHTAG_INVALID_CHARS_RE = /[^[:alnum:]\u0E47-\u0E4E#{HASHTAG_SEPARATORS}]/ RECENT_STATUS_LIMIT = 1000 validates :name, presence: true, format: { with: HASHTAG_NAME_RE } validates :display_name, format: { with: HASHTAG_NAME_RE } validate :validate_name_change, if: -> { !new_record? && name_changed? } validate :validate_display_name_change, if: -> { !new_record? && display_name_changed? } scope :reviewed, -> { where.not(reviewed_at: nil) } scope :unreviewed, -> { where(reviewed_at: nil) } scope :pending_review, -> { unreviewed.where.not(requested_review_at: nil) } scope :usable, -> { where(usable: [true, nil]) } scope :listable, -> { where(listable: [true, nil]) } scope :trendable, -> { Setting.trendable_by_default ? where(trendable: [true, nil]) : where(trendable: true) } scope :not_trendable, -> { where(trendable: false) } scope :suggestions_for_account, ->(account) { recently_used(account).not_featured_by(account) } scope :not_featured_by, ->(account) { where.not(id: account.featured_tags.select(:tag_id)) } scope :recently_used, lambda { |account| joins(:statuses) .where(statuses: { id: account.statuses.select(:id).limit(RECENT_STATUS_LIMIT) }) .group(:id).order(Arel.sql('count(*) desc')) } scope :matches_name, ->(term) { where(arel_table[:name].lower.matches(arel_table.lower("#{sanitize_sql_like(Tag.normalize(term))}%"), nil, true)) } # Search with case-sensitive to use B-tree index update_index('tags', :self) def to_param name end def display_name attributes['display_name'] || name end def usable boolean_with_default('usable', true) end alias usable? usable def listable boolean_with_default('listable', true) end alias listable? listable def trendable boolean_with_default('trendable', Setting.trendable_by_default) end alias trendable? trendable def requires_review? reviewed_at.nil? end def reviewed? reviewed_at.present? end def requested_review? requested_review_at.present? end def requires_review_notification? requires_review? && !requested_review? end def decaying? max_score_at && max_score_at >= Trends.tags.options[:max_score_cooldown].ago && max_score_at < 1.day.ago end def history @history ||= Trends::History.new('tags', id) end class << self def find_or_create_by_names(name_or_names) names = Array(name_or_names).map { |str| [normalize(str), str] }.uniq(&:first) names.map do |(normalized_name, display_name)| tag = matching_name(normalized_name).first || create(name: normalized_name, display_name: display_name.gsub(HASHTAG_INVALID_CHARS_RE, '')) yield tag if block_given? tag end end def search_for(term, limit = 5, offset = 0, options = {}) stripped_term = term.strip query = Tag.listable.matches_name(stripped_term) query = query.merge(matching_name(stripped_term).or(where.not(reviewed_at: nil))) if options[:exclude_unreviewed] query.order(Arel.sql('length(name) ASC, name ASC')) .limit(limit) .offset(offset) end def find_normalized(name) matching_name(name).first end def find_normalized!(name) find_normalized(name) || raise(ActiveRecord::RecordNotFound) end def matching_name(name_or_names) names = Array(name_or_names).map { |name| arel_table.lower(normalize(name)) } if names.size == 1 where(arel_table[:name].lower.eq(names.first)) else where(arel_table[:name].lower.in(names)) end end def normalize(str) HashtagNormalizer.new.normalize(str) end end private def validate_name_change errors.add(:name, I18n.t('tags.does_not_match_previous_name')) unless name_was.mb_chars.casecmp(name.mb_chars).zero? end def validate_display_name_change unless HashtagNormalizer.new.normalize(display_name).casecmp(name.mb_chars).zero? errors.add(:display_name, I18n.t('tags.does_not_match_previous_name')) end end end