gitlab-org--gitlab-foss/lib/gitlab/sql/pattern.rb
2017-08-31 03:14:58 +09:00

46 lines
1.1 KiB
Ruby

module Gitlab
module SQL
module Pattern
extend ActiveSupport::Concern
MIN_CHARS_FOR_PARTIAL_MATCHING = 3
REGEX_QUOTED_WORD = /(?<=^| )"[^"]+"(?= |$)/
class_methods do
def to_pattern(query)
if partial_matching?(query)
"%#{sanitize_sql_like(query)}%"
else
sanitize_sql_like(query)
end
end
def partial_matching?(query)
query.length >= MIN_CHARS_FOR_PARTIAL_MATCHING
end
def to_fuzzy_arel(column, query)
words = select_fuzzy_words(query)
matches = words.map { |word| arel_table[column].matches(to_pattern(word)) }
matches.reduce { |result, match| result.and(match) }
end
def select_fuzzy_words(query)
quoted_words = query.scan(REGEX_QUOTED_WORD)
query = quoted_words.reduce(query) { |q, quoted_word| q.sub(quoted_word, '') }
words = query.split(/\s+/)
quoted_words.map! { |quoted_word| quoted_word[1..-2] }
words.concat(quoted_words)
words.select { |word| partial_matching?(word) }
end
end
end
end
end