20 lines
1.2 KiB
Ruby
20 lines
1.2 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(:quote) { str('"') }
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rule(:colon) { str(':') }
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rule(:hash) { 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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# See SearchQueryTransformer::PrefixClause::initialize for list of legal prefix operators.
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# These are explictly enumerated here so they don't get mistaken for URLs.
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rule(:prefix) { ((str('domain') | str('is') | str('has') | str('lang') | str('before') | str('after') | str('from') | str('mentions') | str('to') | str('scope') | str('sort') | str('visibility')).as(:prefix) >> colon) }
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# See CustomEmoji::SHORTCODE_RE_FRAGMENT and SCAN_RE for emoji grammar.
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rule(:shortcode) { (colon >> match('[a-zA-Z0-9_]').repeat(2).as(:shortcode) >> colon) }
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rule(:hashtag) { (hash >> match('[^\s#]').repeat(1).as(:hashtag)) }
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rule(:phrase) { (quote >> match('[^"]').repeat(1).as(:phrase) >> quote) }
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rule(:clause) { (operator.maybe >> prefix.maybe >> (phrase | shortcode | hashtag | 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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