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21 lines
1.1 KiB
Ruby
21 lines
1.1 KiB
Ruby
# frozen_string_literal: true
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class SearchQueryParser < Parslet::Parser
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rule(:term) { match('[^\s]').repeat(1).as(:term) }
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rule(:colon) { str(':') }
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rule(:space) { match('\s').repeat(1) }
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rule(:operator) { (str('+') | str('-')).as(:operator) }
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rule(:prefix_operator) { str('has') | str('is') | str('language') | str('from') | str('before') | str('after') | str('during') | str('in') }
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rule(:prefix) { prefix_operator.as(:prefix_operator) >> colon }
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rule(:phrase) do
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(str('"') >> match('[^"]').repeat.as(:phrase) >> str('"')) |
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(match('[“”„]') >> match('[^“”„]').repeat.as(:phrase) >> match('[“”„]')) |
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(str('«') >> match('[^«»]').repeat.as(:phrase) >> str('»')) |
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(str('「') >> match('[^「」]').repeat.as(:phrase) >> str('」')) |
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(str('《') >> match('[^《》]').repeat.as(:phrase) >> str('》'))
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end
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rule(:clause) { (operator.maybe >> prefix.maybe.as(:prefix) >> (phrase | term)).as(:clause) }
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rule(:query) { (clause >> space.maybe).repeat.as(:query) }
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root(:query)
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end
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