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59 lines
1.6 KiB
59 lines
1.6 KiB
# frozen_string_literal: true |
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class StatusLengthValidator < ActiveModel::Validator |
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MAX_CHARS = (ENV['MAX_TOOT_CHARS'] || 500).to_i |
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URL_PLACEHOLDER_CHARS = 23 |
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URL_PLACEHOLDER = 'x' * 23 |
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def validate(status) |
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return unless status.local? && !status.reblog? |
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status.errors.add(:text, I18n.t('statuses.over_character_limit', max: MAX_CHARS)) if too_long?(status) |
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end |
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private |
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def too_long?(status) |
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countable_length(combined_text(status)) > MAX_CHARS |
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end |
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def countable_length(str) |
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str.each_grapheme_cluster.size |
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end |
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def combined_text(status) |
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[status.spoiler_text, countable_text(status.text)].join |
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end |
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def countable_text(str) |
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return '' if str.blank? |
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# To ensure that we only give length concessions to entities that |
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# will be correctly parsed during formatting, we go through full |
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# entity extraction |
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entities = Extractor.remove_overlapping_entities(Extractor.extract_urls_with_indices(str, extract_url_without_protocol: false) + Extractor.extract_mentions_or_lists_with_indices(str)) |
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rewrite_entities(str, entities) do |entity| |
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if entity[:url] |
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URL_PLACEHOLDER |
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elsif entity[:screen_name] |
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"@#{entity[:screen_name].split('@').first}" |
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end |
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end |
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end |
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def rewrite_entities(str, entities) |
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entities.sort_by! { |entity| entity[:indices].first } |
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result = +'' |
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last_index = entities.reduce(0) do |index, entity| |
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result << str[index...entity[:indices].first] |
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result << yield(entity) |
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entity[:indices].last |
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end |
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result << str[last_index..] |
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result |
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end |
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end
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