Module: GenericSearch::BuildMethods

Included in:
Klass
Defined in:
lib/generic_search/build_methods.rb

Overview

def self.custom_config

{
    :transitions => {
        :script_status => {
            :field => :script_status_id,
            :lambda => lambda do |operator, value|
              Status.where("name #{operator} ?", value).collect(&:id)
            end
        }
    }
}

end

Instance Method Summary collapse

Instance Method Details

#build_group(group) ⇒ Object 



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# File 'lib/generic_search/build_methods.rb', line 183

def build_group(group)

  if group.blank?
    return
  end

  group_entities = group.scan(/\w+\(.*?\)/)

  @joins ||= []
  group_table_fields_map = {}
  @group = []
  @group_object_access = []

  group_entities.each do |group_entity|
    match, table, select_fields = *group_entity.match(/(\w+)\(*([\s\w,]*)\)*/)
    table.strip!
    fields = select_fields.split(/\s*,\s*/)
    group_table_fields_map[table] = fields

    #@joins << @base_class._table_relation[table.strip] if table != @base_class.table_name

    table.strip!
    if table != @base_table
      relation_name = (@base_class._table_relation[table] || (@base_class._relation_table[table.intern] ? table.intern : nil))
      table_name = @base_class._table_relation[table] ? table : @base_class._relation_table[table.intern]
      @joins << relation_name if relation_name
    else
      table_name = table
    end

    fields.each do |field|
      @group << "#{table_name}.#{field}"
      #@group_object_access << (@base_table == table ? field : "#{@base_class._table_relation[table]}.#{field}")
      @group_object_access << (@base_table == table_name ? field : "#{relation_name}.#{field}")
    end
  end

  group_table_fields_map.each do |table, column_names|
    validate_columns(table, column_names, :group)
  end


end

#build_having(having) ⇒ Object 



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# File 'lib/generic_search/build_methods.rb', line 227

def build_having(having)
  if having.blank?
    return
  end

  self.having = having.gsub(/(^"|"$)/, '').strip
end

#build_limit(limit) ⇒ Object 



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# File 'lib/generic_search/build_methods.rb', line 245

def build_limit(limit)
  #TODO: Test required for group.blank?
  if self.options[:no_results] or !self.group.blank?
    self.limit = nil
  else
    self.limit = limit.blank? ? GenericSearch::DEFAULT_LIMIT : limit
  end

end

#build_options(options) ⇒ Object

options = no_results, no_limit_count



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# File 'lib/generic_search/build_methods.rb', line 265

def build_options(options)

  self.options = {}

  return if options.blank?

  if options.include? 'no_results'
    self.options[:no_results] = true
  end

  if options.include? 'no_limit_count'
    self.options[:no_limit_count] = true
  end

  if options.include? 'distinct'
    self.options[:distinct] = true
  end

  if options.include? 'no_grouped_results'
    self.options[:no_grouped_results] = true
  end

end

#build_response ⇒ Object 



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# File 'lib/generic_search/build_methods.rb', line 289

def build_response

  self.response = {
      :success => self.status == :ok ? true : false,
      :code => self.status == :ok ? 200 : 400,
      :status => self.status,
      :message => self.messages,
      :client_IP => nil,
      :controller => nil,

      :server => Socket.gethostname,
      :where_clause => self.where,
      :no_limit_result_count => self.no_limit_count,
      :limit_result_count => self.limit_result_count,
      :timestamp => Time.now,
      :groups => self.grouped_results
      #"groups" => params.has_key?(:no_results) ? [] : @grouped_results
  }

end

#build_results(results) ⇒ Object 



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# File 'lib/generic_search/build_methods.rb', line 153

def build_results(results)
  table_selected_fields = {}

  selects = if results.blank?
              [self.base_class.table_name]
            else
              selects = results.scan(/\w+\(.*?\)/)
              results_clone = results.clone

              selects.each do |select|
                results_clone.gsub!(select, '')
              end

              selects += results_clone.split(/,/).delete_if(&:blank?)
              selects
            end

  selects.each do |select|
    match, table, select_fields = *select.match(/(\w+)\(*([\s\w,]*)\)*/)
    table_selected_fields[table] = select_fields.blank? ? nil : select_fields.strip.split(/\s*,\s*/)
  end

  table_selected_fields.each do |table_name, column_names|
    validate_columns(table_name, column_names, :results)
  end

  #TODO: self.select = table_selected_fields.clone
  self.select = table_selected_fields
end

#build_sort_order(sort_order) ⇒ Object 



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# File 'lib/generic_search/build_methods.rb', line 235

def build_sort_order(sort_order)
  self.sort_order = if sort_order.nil?
                      "\"#{self.base_table}\".\"id\" ASC"
                    elsif sort_order.strip == "\"\"" || sort_order.strip == "\'\'" || sort_order.strip == ''
                      nil
                    else
                      sort_order.strip
                    end
end

#build_start(start) ⇒ Object 



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# File 'lib/generic_search/build_methods.rb', line 255

def build_start(start)
  #TODO: Test required for group.blank?
  self.start = if self.options[:no_results] or !self.group.blank?
                 nil
               else
                 start.blank? ? 0 : start
               end
end

#build_where(query) ⇒ Object 



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# File 'lib/generic_search/build_methods.rb', line 18

def build_where(query)

  if query.blank?
    return
  end

  query_table_list = []

  query.each_line('),') do |segment|
    segment.gsub!(/,$/, "")
    query_table_list << segment
  end

  query_per_table = Array.new

  @joins = []

  query_table_list.each do |query_item|

    table, search_params = query_item.to_s.split('(', 2)
    table.strip!

    column_names = []

    if table.strip != @base_table
      relation_name = @base_class._table_relation[table.strip]
      @joins << relation_name if relation_name
    end

    search_params ||= ''
    search_params.gsub!(/\)$/, "")

    single_param_array = search_params.strip.split(/\s*,\s*/)
    single_param_array_length = single_param_array.length

    column_values = []
    current_value = single_param_array[0]
    i=0

    until i >= single_param_array_length

      next_value = single_param_array[i + 1]

      if next_value.nil? or next_value.match(/([<>=!~]|between)/)
        column_values << current_value
        current_value = next_value
      else
        current_value << (',' + next_value)
      end

      i = i + 1
    end

    column_values.each do |search_param|
      search_param.gsub!(/,$/, "")

      if search_param.match(/(\w+)\s+between\s+(\*?.*)and(\*?.*)/i)
        key, from, to = $1.strip, $2.strip, $3.strip

        single_search_param = if from.match(/^\d+$/) and to.match(/^\d+$/)
                                "\"#{table}\".\"#{key}\" between #{from} and #{to}"
                              else
                                "\"#{table}\".\"#{key}\" between '#{from.to_time.to_s(:db)}' and '#{to.to_time.to_s(:db)}'"
                              end

      else
        search_param.match(/(\w+)(\s*[<>=!~]*\s*)(\*?.*)/)
        key, operator, value = $1.strip, $2.strip, $3.strip

        if operator == '='
          if value.include? '*'
            value.gsub!('*', '%')
            value = "#{value}"
            operator = 'ILIKE'
            #elsif value.include? '/'
            #  value = "(#{value})"
            #  operator = 'in'
            #elsif value.include? '|'
            #  value = "(#{value})"
            #  operator = 'in'
            #else
            #  value = "'#{value}'"
          end

        else
          value = "#{value}"
        end

        config = GenericSearch.config[table.intern]
        config = (config and config[:for_where])
        key_intern = key.intern

        #TODO: Test Requires
        single_search_param = if config and config.has_key?(key_intern)
                                config = config[key_intern]
                                value = config[:lambda].call(operator, value)
                                #subQuery = value.is_a?(Array) ? "in (#{value.blank? ? 'NULL' : value.join(',')})" : "= '#{value}'"
                                subQuery = if value.is_a?(Array)
                                             if value.blank?
                                               "in (NULL)"
                                             else
                                               "in (#{value.join(',')})"
                                             end
                                           else
                                             "= '#{value}'"
                                           end
                                "\"#{table}\".\"#{config[:field]}\" #{subQuery}"
                              elsif operator == '=' and value.include?('|')

                                value = value.gsub(/\s*\|\s*/, ' OR ').split(/(AND|OR)/)
                                .collect do |val|
                                  val.match(/(AND|OR)/) ? val : "\"#{table}\".\"#{key}\" #{operator} '#{val.strip}'"
                                end.join(' ')

                                "(#{value})"

                              elsif operator == '=' and value.include?(',')
                                # AND Support should be handled in a different way
                                # using group=user.id, having='ARRAY_AGG(users.id) @> ARRAY[23, 34, 45]::integer[]'
                              else
                                "\"#{table}\".\"#{key}\" #{operator} '#{value}'"
                              end

        column_names << key
      end

      query_per_table << single_search_param if single_search_param
    end

    self.validate_columns(table, column_names, :query)
  end

  self.where = query_per_table.join(' AND ')
end