forked from fedi/mastodon
121 lines
3 KiB
Ruby
121 lines
3 KiB
Ruby
# frozen_string_literal: true
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module Extractor
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MAX_DOMAIN_LENGTH = 253
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extend Twitter::TwitterText::Extractor
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module_function
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def extract_entities_with_indices(text, options = {}, &block)
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entities = begin
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extract_urls_with_indices(text, options) +
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extract_hashtags_with_indices(text, check_url_overlap: false) +
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extract_mentions_or_lists_with_indices(text) +
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extract_extra_uris_with_indices(text)
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end
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return [] if entities.empty?
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entities = remove_overlapping_entities(entities)
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entities.each(&block) if block
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entities
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end
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def extract_mentions_or_lists_with_indices(text)
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return [] unless text && Twitter::TwitterText::Regex[:at_signs].match?(text)
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possible_entries = []
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text.scan(Account::MENTION_RE) do |screen_name, _|
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match_data = $LAST_MATCH_INFO
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after = $'
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unless Twitter::TwitterText::Regex[:end_mention_match].match?(after)
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_, domain = screen_name.split('@')
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next if domain.present? && domain.length > MAX_DOMAIN_LENGTH
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start_position = match_data.char_begin(1) - 1
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end_position = match_data.char_end(1)
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possible_entries << {
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screen_name: screen_name,
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indices: [start_position, end_position],
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}
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end
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end
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if block_given?
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possible_entries.each do |mention|
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yield mention[:screen_name], mention[:indices].first, mention[:indices].last
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end
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end
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possible_entries
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end
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def extract_hashtags_with_indices(text, _options = {})
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return [] unless text&.index('#')
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possible_entries = []
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text.scan(Tag::HASHTAG_RE) do |hash_text, _|
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match_data = $LAST_MATCH_INFO
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start_position = match_data.char_begin(1) - 1
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end_position = match_data.char_end(1)
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after = $'
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if %r{\A://}.match?(after)
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hash_text.match(/(.+)(https?\Z)/) do |matched|
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hash_text = matched[1]
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end_position -= matched[2].codepoint_length
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end
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end
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possible_entries << {
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hashtag: hash_text,
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indices: [start_position, end_position],
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}
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end
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if block_given?
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possible_entries.each do |tag|
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yield tag[:hashtag], tag[:indices].first, tag[:indices].last
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end
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end
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possible_entries
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end
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def extract_cashtags_with_indices(_text)
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[]
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end
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def extract_extra_uris_with_indices(text)
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return [] unless text&.index(':')
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possible_entries = []
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text.scan(Twitter::TwitterText::Regex[:valid_extended_uri]) do
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valid_uri_match_data = $LAST_MATCH_INFO
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start_position = valid_uri_match_data.char_begin(3)
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end_position = valid_uri_match_data.char_end(3)
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possible_entries << {
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url: valid_uri_match_data[3],
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indices: [start_position, end_position],
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}
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end
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if block_given?
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possible_entries.each do |url|
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yield url[:url], url[:indices].first, url[:indices].last
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end
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end
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possible_entries
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end
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end
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