# frozen_string_literal: true require 'singleton' module TanukiEmoji # Index of known Emoji Characters class Index include Singleton include Enumerable attr_reader :all # Add a new Emoji to the index # # @param [TanukiEmoji::Character] emoji def add(emoji) @name_index ||= {} @alpha_code_index ||= {} @codepoints_index ||= {} # Check if exists and index otherwise insertion_mutex.synchronize do raise ::TanukiEmoji::AlphaCodeAlreadyIndexedError.new emoji.name, emoji.alpha_code if @alpha_code_index.key? emoji.alpha_code raise ::TanukiEmoji::CodepointAlreadyIndexedError.new emoji.name, emoji.codepoints if @codepoints_index.key? emoji.codepoints emoji.codepoints_alternates.each do |codepoints| raise ::TanukiEmoji::CodepointAlreadyIndexedError.new emoji.name, codepoints if @codepoints_index.key? codepoints end @name_index[emoji.name] = emoji @alpha_code_index[emoji.alpha_code] = emoji @codepoints_index[emoji.codepoints] = emoji emoji.codepoints_alternates.each do |codepoints| @codepoints_index[codepoints] = emoji end emoji.aliases.each do |alpha_code| @name_index[::TanukiEmoji::Character.format_name(alpha_code)] = emoji @alpha_code_index[::TanukiEmoji::Character.format_alpha_code(alpha_code)] = emoji end end all << emoji emoji end # Find an Emoji by its :alpha_code: # # @param [String] alpha_code # @return [TanukiEmoji::Character] def find_by_alpha_code(alpha_code) @alpha_code_index[Character.format_alpha_code(alpha_code)] end # Find an Emoji by its Unicode representation # # @param [String] unicode_codepoints # @return [TanukiEmoji::Character] def find_by_codepoints(unicode_codepoints) @codepoints_index[unicode_codepoints] end # Clears the index to start from scratch # # @note This is intended to be used in test and development only # @param [Boolean] reload whether to reload emoji database or leave it empty def reset!(reload: true) @all = [] remove_instance_variable :@name_index if defined? @name_index remove_instance_variable :@alpha_code_index if defined? @alpha_code_index remove_instance_variable :@codepoints_index if defined? @codepoints_index load_data_files if reload end # Return a regular expression that can be used to search for indexed `:alpha_codes:` # # @return [Regexp] regular expression that matches indexed `:alpha_code:` def alpha_code_pattern /(?<=[^[:alnum:]:]|\n|^) :(#{@name_index.keys.map { |name| Regexp.escape(name) }.join('|')}): (?=[^[:alnum:]:]|$)/x end # Return a regular expression that can be used to search for emoji codepoints # # @return [Regexp] regular expression that matches indexed emoji codepoints def codepoints_pattern /(#{@codepoints_index.keys.map { |moji| Regexp.escape(moji) }.join('|')})/ end private def initialize @all = [] load_data_files end def insertion_mutex @insertion_mutex ||= Mutex.new end def load_data_files Db::Gemojione.new(index: self).load! end end end