mirror of
https://github.com/funamitech/mastodon
synced 2024-12-12 05:39:02 +09:00
190 lines
4.6 KiB
Ruby
190 lines
4.6 KiB
Ruby
# frozen_string_literal: true
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class AccountSearchService < BaseService
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attr_reader :query, :limit, :offset, :options, :account
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MENTION_ONLY_RE = /\A#{Account::MENTION_RE}\z/i
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# Min. number of characters to look for non-exact matches
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MIN_QUERY_LENGTH = 5
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def call(query, account = nil, options = {})
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@acct_hint = query&.start_with?('@')
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@query = query&.strip&.gsub(/\A@/, '')
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@limit = options[:limit].to_i
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@offset = options[:offset].to_i
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@options = options
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@account = account
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search_service_results.compact.uniq
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end
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private
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def search_service_results
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return [] if query.blank? || limit < 1
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[exact_match] + search_results
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end
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def exact_match
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return unless offset.zero? && username_complete?
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return @exact_match if defined?(@exact_match)
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match = if options[:resolve]
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ResolveAccountService.new.call(query)
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elsif domain_is_local?
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Account.find_local(query_username)
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else
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Account.find_remote(query_username, query_domain)
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end
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match = nil if !match.nil? && !account.nil? && options[:following] && !account.following?(match)
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@exact_match = match
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end
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def search_results
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return [] if limit_for_non_exact_results.zero?
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@search_results ||= begin
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results = from_elasticsearch if Chewy.enabled?
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results ||= from_database
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results
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end
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end
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def from_database
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if account
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advanced_search_results
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else
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simple_search_results
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end
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end
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def advanced_search_results
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Account.advanced_search_for(terms_for_query, account, limit: limit_for_non_exact_results, following: options[:following], offset: offset)
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end
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def simple_search_results
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Account.search_for(terms_for_query, limit: limit_for_non_exact_results, offset: offset)
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end
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def from_elasticsearch
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must_clauses = [{ multi_match: { query: terms_for_query, fields: likely_acct? ? %w(acct.edge_ngram acct) : %w(acct.edge_ngram acct display_name.edge_ngram display_name), type: 'most_fields', operator: 'and' } }]
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should_clauses = []
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if account
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return [] if options[:following] && following_ids.empty?
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if options[:following]
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must_clauses << { terms: { id: following_ids } }
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elsif following_ids.any?
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should_clauses << { terms: { id: following_ids, boost: 100 } }
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end
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end
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query = { bool: { must: must_clauses, should: should_clauses } }
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functions = [reputation_score_function, followers_score_function, time_distance_function]
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records = AccountsIndex.query(function_score: { query: query, functions: functions, boost_mode: 'multiply', score_mode: 'avg' })
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.limit(limit_for_non_exact_results)
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.offset(offset)
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.objects
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.compact
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ActiveRecord::Associations::Preloader.new.preload(records, :account_stat)
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records
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rescue Faraday::ConnectionFailed, Parslet::ParseFailed
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nil
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end
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def reputation_score_function
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{
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script_score: {
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script: {
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source: "(Math.max(doc['followers_count'].value, 0) + 0.0) / (Math.max(doc['followers_count'].value, 0) + Math.max(doc['following_count'].value, 0) + 1)",
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},
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},
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}
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end
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def followers_score_function
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{
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script_score: {
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script: {
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source: "Math.log10(Math.max(doc['followers_count'].value, 0) + 2)",
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},
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},
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}
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end
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def time_distance_function
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{
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gauss: {
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last_status_at: {
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scale: '30d',
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offset: '30d',
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decay: 0.3,
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},
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},
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}
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end
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def following_ids
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@following_ids ||= account.active_relationships.pluck(:target_account_id) + [account.id]
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end
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def limit_for_non_exact_results
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return 0 if @account.nil? && query.size < MIN_QUERY_LENGTH
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if exact_match?
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limit - 1
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else
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limit
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end
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end
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def terms_for_query
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if domain_is_local?
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query_username
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else
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query
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end
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end
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def split_query_string
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@split_query_string ||= query.split('@')
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end
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def query_username
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@query_username ||= split_query_string.first || ''
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end
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def query_domain
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@query_domain ||= query_without_split? ? nil : split_query_string.last
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end
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def query_without_split?
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split_query_string.size == 1
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end
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def domain_is_local?
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@domain_is_local ||= TagManager.instance.local_domain?(query_domain)
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end
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def exact_match?
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exact_match.present?
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end
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def username_complete?
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query.include?('@') && "@#{query}".match?(MENTION_ONLY_RE)
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end
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def likely_acct?
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@acct_hint || username_complete?
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end
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end
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