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 62

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 67

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)
            )

  if session[:map_fields].nil? || params[options[:file_field]]
    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

    @rows = []
    FasterCSV.foreach(temp_path) do |row|
      @rows << row
      break if @rows.size == 10
    end
    expected_fields = self.class.read_inheritable_attribute(:map_fields_fields)
    @fields = ([nil] + expected_fields).inject([]){ |o, e| o << [e, o.size]}
    @parameters = []
    options[:params].each do |param|
      @parameters += ParamsParser.parse(params, param)
    end
  else
    if session[:map_fields][:file].nil? || params[:fields].nil?
      session[:map_fields] = nil
      @map_fields_error =  InconsistentStateError
    else
      @mapped_fields = MappedFields.new(session[:map_fields][:file], 
                                        params[:fields],
                                        params[:ignore_first_row])
    end
  end
end

#map_fields_cleanup ⇒ Object 



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# File 'lib/map_fields.rb', line 71

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 58

def mapped_fields
  @mapped_fields
end