Module: MapFields

Defined in:
lib/map_fields.rb

Defined Under Namespace

Modules: ClassMethods Classes: InconsistentStateError, MappedFields, MissingFileContentsError, ParamsParser

Constant Summary collapse

VERSION = 
'1.0.0'

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/map_fields.rb', line 6

def self.included(base)
  base.extend(ClassMethods)
end

Instance Method Details

#fields_mapped? ⇒ Boolean

Returns:

  • (Boolean)

Raises:

  • (@map_fields_error) 


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# File 'lib/map_fields.rb', line 78

def fields_mapped?
  raise @map_fields_error if @map_fields_error
  @mapped_fields
end

#map_field_parameters(&block) ⇒ Object 



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# File 'lib/map_fields.rb', line 83

def map_field_parameters(&block)

end

#map_fields ⇒ Object 



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# File 'lib/map_fields.rb', line 10

def map_fields
  default_options = {
    :file_field => 'file',
    :params => []
  }
  options = default_options.merge(
              self.class.read_inheritable_attribute(:map_fields_options)
            )

  RAILS_DEFAULT_LOGGER.debug("session[:map_fields]: #{session[:map_fields]}")
  RAILS_DEFAULT_LOGGER.debug("params[options[:file_field]]: #{params[options[:file_field]]}")
  if session[:map_fields].nil? || !params[options[:file_field]].blank?
    session[:map_fields] = {}
    if params[options[:file_field]].blank?
      @map_fields_error = MissingFileContentsError
      return
    end

    file_field = params[options[:file_field]]

    temp_path = File.join(Dir::tmpdir, "map_fields_#{Time.now.to_i}_#{$$}")
    File.open(temp_path, 'wb') do |f|
      f.write file_field.read
    end

    session[:map_fields][:file] = temp_path
  else
    if session[:map_fields][:file].nil? || params[:fields].nil?
      session[:map_fields] = nil
      @map_fields_error =  InconsistentStateError
    else
      expected_fields = self.class.read_inheritable_attribute(:map_fields_fields)
      if expected_fields.respond_to?(:call)
        expected_fields = expected_fields.call(params)
      end
      @mapped_fields = MappedFields.new(session[:map_fields][:file],
                                        expected_fields,
                                        params[:fields],
                                        params[:ignore_first_row])
    end
  end

  unless @map_fields_error
    @rows = []
    begin
      FasterCSV.foreach(session[:map_fields][:file]) do |row|
        @rows << row
        break if @rows.size == 10
      end
    rescue FasterCSV::MalformedCSVError => e
      @map_fields_error = e
    end
    expected_fields = self.class.read_inheritable_attribute(:map_fields_fields)
    if expected_fields.respond_to?(:call)
      expected_fields = expected_fields.call(params)
    end
    @fields = ([nil] + expected_fields).inject([]){ |o, e| o << [e, o.size]}
    @parameters = []
    options[:params].each do |param|
      @parameters += ParamsParser.parse(params, param)
    end
  end
end

#map_fields_cleanup ⇒ Object 



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# File 'lib/map_fields.rb', line 87

def map_fields_cleanup
  if @mapped_fields
    if session[:map_fields][:file]
      File.delete(session[:map_fields][:file])
    end
    session[:map_fields] = nil
    @mapped_fields = nil
    @map_fields_error = nil
  end
end

#mapped_fields ⇒ Object 



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# File 'lib/map_fields.rb', line 74

def mapped_fields
  @mapped_fields
end