142 lines
4.1 KiB
Ruby
142 lines
4.1 KiB
Ruby
# frozen_string_literal: true
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# == Schema Information
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#
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# Table name: tags
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#
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# id :bigint(8) not null, primary key
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# name :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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# usable :boolean
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# trendable :boolean
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# listable :boolean
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# reviewed_at :datetime
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# requested_review_at :datetime
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# last_status_at :datetime
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# max_score :float
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# max_score_at :datetime
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#
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class Tag < ApplicationRecord
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has_and_belongs_to_many :statuses
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has_and_belongs_to_many :accounts
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has_many :featured_tags, dependent: :destroy, inverse_of: :tag
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HASHTAG_SEPARATORS = "_\u00B7\u200c"
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HASHTAG_NAME_RE = "([[:word:]_][[:word:]#{HASHTAG_SEPARATORS}]*[[:alpha:]#{HASHTAG_SEPARATORS}][[:word:]#{HASHTAG_SEPARATORS}]*[[:word:]_])|([[:word:]_]*[[:alpha:]][[:word:]_]*)"
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HASHTAG_RE = /(?:^|[^\/\)\w])#(#{HASHTAG_NAME_RE})/i
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validates :name, presence: true, format: { with: /\A(#{HASHTAG_NAME_RE})\z/i }
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validate :validate_name_change, if: -> { !new_record? && name_changed? }
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scope :reviewed, -> { where.not(reviewed_at: nil) }
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scope :unreviewed, -> { where(reviewed_at: nil) }
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scope :pending_review, -> { unreviewed.where.not(requested_review_at: nil) }
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scope :usable, -> { where(usable: [true, nil]) }
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scope :listable, -> { where(listable: [true, nil]) }
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scope :trendable, -> { Setting.trendable_by_default ? where(trendable: [true, nil]) : where(trendable: true) }
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scope :not_trendable, -> { where(trendable: false) }
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scope :recently_used, ->(account) { joins(:statuses).where(statuses: { id: account.statuses.select(:id).limit(1000) }).group(:id).order(Arel.sql('count(*) desc')) }
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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
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update_index('tags', :self)
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def to_param
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name
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end
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def usable
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boolean_with_default('usable', true)
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end
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alias usable? usable
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def listable
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boolean_with_default('listable', true)
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end
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alias listable? listable
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def trendable
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boolean_with_default('trendable', Setting.trendable_by_default)
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end
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alias trendable? trendable
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def requires_review?
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reviewed_at.nil?
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end
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def reviewed?
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reviewed_at.present?
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end
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def requested_review?
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requested_review_at.present?
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end
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def requires_review_notification?
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requires_review? && !requested_review?
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end
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def decaying?
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max_score_at && max_score_at >= Trends.tags.options[:max_score_cooldown].ago && max_score_at < 1.day.ago
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end
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def history
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@history ||= Trends::History.new('tags', id)
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end
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class << self
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def find_or_create_by_names(name_or_names)
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Array(name_or_names).map(&method(:normalize)).uniq { |str| str.mb_chars.downcase.to_s }.map do |normalized_name|
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tag = matching_name(normalized_name).first || create(name: normalized_name)
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yield tag if block_given?
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tag
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end
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end
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def search_for(term, limit = 5, offset = 0, options = {})
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stripped_term = term.strip
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query = Tag.listable.matches_name(stripped_term)
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query = query.merge(matching_name(stripped_term).or(where.not(reviewed_at: nil))) if options[:exclude_unreviewed]
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query.order(Arel.sql('length(name) ASC, name ASC'))
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.limit(limit)
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.offset(offset)
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end
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def find_normalized(name)
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matching_name(name).first
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end
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def find_normalized!(name)
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find_normalized(name) || raise(ActiveRecord::RecordNotFound)
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end
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def matching_name(name_or_names)
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names = Array(name_or_names).map { |name| arel_table.lower(normalize(name)) }
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if names.size == 1
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where(arel_table[:name].lower.eq(names.first))
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else
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where(arel_table[:name].lower.in(names))
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end
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end
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def normalize(str)
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str.gsub(/\A#/, '')
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end
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end
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private
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def validate_name_change
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errors.add(:name, I18n.t('tags.does_not_match_previous_name')) unless name_was.mb_chars.casecmp(name.mb_chars).zero?
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end
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end
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