OpenProject is the leading open source project management software.
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openproject/lib/open_project/full_text_search.rb

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#-- encoding: UTF-8
#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2021 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# See docs/COPYRIGHT.rdoc for more details.
#++
module OpenProject
# This module provides utility methods to work with PostgreSQL's full-text capabilities (TSVECTOR)
module FullTextSearch
DISALLOWED_CHARACTERS = /['?\\:()&|!*<>]/
def self.tsv_where(table_name, column_name, value, options = { concatenation: :and, normalization: :text })
if OpenProject::Database.allows_tsv?
column = '"' + table_name.to_s + '"."' + column_name.to_s + '_tsv"'
query = tokenize(value, options[:concatenation], options[:normalization])
language = OpenProject::Configuration.main_content_language
ActiveRecord::Base.send(
:sanitize_sql_array, ["#{column} @@ to_tsquery(?, ?)",
language,
query]
)
end
end
def self.tokenize(text, concatenation = :and, normalization = :text)
terms = normalize(clean_terms(text), normalization).split(/[\s]+/).reject(&:blank?)
case concatenation
when :and
# all terms need to hit
terms.join ' & '
when :and_not
# all terms must not hit.
'! ' + terms.join(' & ! ')
end
end
def self.normalize(text, type = :text)
case type
when :text
normalize_text(text)
when :filename
normalize_filename(text)
end
end
def self.normalize_text(text)
I18n.with_locale(:en) { I18n.transliterate(text.to_s.downcase) }
end
def self.normalize_filename(filename)
name_in_words = to_words filename.to_s.downcase
I18n.with_locale(:en) { I18n.transliterate(name_in_words) }
end
def self.to_words(text)
text.gsub /[^[:alnum:]]/, ' '
end
def self.clean_terms(terms)
terms.gsub(DISALLOWED_CHARACTERS, ' ')
end
end
end