Sha256: 669d6d6462d37fe3abc742019069ebb0f9ee538c97bdd21903f078025cca3ab0
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Size: 1.83 KB
Versions: 6
Compression:
Stored size: 1.83 KB
Contents
require 'strscan'
module TogoStanza::Stanza
class SearchQuery
def initialize(query)
@raw = query
end
attr_reader :raw
def to_filter(method, var_name)
"FILTER (#{to_clause(method, var_name)})"
end
def tokens
@tokens ||= begin
scanner = StringScanner.new(@raw)
scanner.skip /\s+/
parse(scanner)
end
end
private
def to_clause(method, var_name)
case method.to_s
when 'regex', 'contains'
tokens.each_with_object('') {|token, acc|
case token
when :lparen
acc << '('
when :rparen
acc << ')'
when :or
acc << ' || '
when :and
acc << ' && '
else
acc << "#{method}(?#{var_name}, #{token.inspect})"
end
}
when 'bif_contains'
clause = tokens.each_with_object('') {|token, acc|
case token
when :lparen
acc << '('
when :rparen
acc << ')'
when :or
acc << ' OR '
when :and
acc << ' AND '
else
acc << token.inspect
end
}
"bif:contains(?#{var_name}, '#{clause}')"
else
raise ArgumentError, method
end
end
def parse(scanner, tokens = [])
scanner.skip /\s+\z/
return tokens if scanner.eos?
if scanner.scan(/"((?:[^\\"]|\\.)*)"/)
tokens << scanner[1].gsub(/\\(.)/, '\1')
elsif scanner.scan(/\(\s*/)
tokens << :lparen
elsif scanner.scan(/\s*\)/)
tokens << :rparen
elsif scanner.scan(/\s*OR\s*/)
tokens << :or
elsif scanner.scan(/\s*AND\s*|\s+/)
tokens << :and
else
tokens << scanner.scan(/\S+(?<!\))/)
end
parse(scanner, tokens)
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems