70 lines
1.7 KiB
Ruby
70 lines
1.7 KiB
Ruby
require 'active_support/core_ext/object/blank'
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require 'active_support/ordered_hash'
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require 'active_support/core_ext/string/inflections'
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module RailsGuides
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class Indexer
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attr_reader :body, :result, :warnings, :level_hash
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def initialize(body, warnings)
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@body = body
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@result = @body.dup
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@warnings = warnings
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end
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def index
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@level_hash = process(body)
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end
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private
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def process(string, current_level=3, counters=[1])
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s = StringScanner.new(string)
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level_hash = ActiveSupport::OrderedHash.new
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while !s.eos?
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re = %r{^h(\d)(?:\((#.*?)\))?\s*\.\s*(.*)$}
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s.match?(re)
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if matched = s.matched
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matched =~ re
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level, idx, title = $1.to_i, $2, $3.strip
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if level < current_level
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# This is needed. Go figure.
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return level_hash
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elsif level == current_level
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index = counters.join(".")
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idx ||= '#' + title_to_idx(title)
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raise "Parsing Fail" unless @result.sub!(matched, "h#{level}(#{idx}). #{index} #{title}")
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key = {
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:title => title,
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:id => idx
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}
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# Recurse
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counters << 1
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level_hash[key] = process(s.post_match, current_level + 1, counters)
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counters.pop
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# Increment the current level
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last = counters.pop
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counters << last + 1
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end
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end
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s.getch
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end
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level_hash
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end
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def title_to_idx(title)
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idx = title.strip.parameterize.sub(/^\d+/, '')
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if warnings && idx.blank?
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puts "BLANK ID: please put an explicit ID for section #{title}, as in h5(#my-id)"
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end
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idx
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end
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end
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end
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