Module: DataGrid::Controller

Extended by:
ActiveSupport::Concern
Defined in:
lib/data_grid/controller.rb,
lib/data_grid/csv_exporter.rb,
lib/data_grid/cookies_state_saver.rb

Constant Summary collapse

STATE_KEYS = 
[:per_page, :page, :sort, :sort_direction]

Instance Method Summary collapse

Instance Method Details

#export(data_grid, filename = DataGrid.export_filename) ⇒ Object

Do CSV export



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# File 'lib/data_grid/csv_exporter.rb', line 24

def export(data_grid, filename = DataGrid.export_filename)
  require 'csv'
  
  if request.env['HTTP_USER_AGENT'] =~ /msie/i
   headers['Pragma'] = 'public'
   headers["Content-type"] = "text/plain; charset=utf-8; header=present"
   headers['Cache-Control'] = 'no-cache, must-revalidate, post-check=0, pre-check=0'       
   headers['Content-Disposition'] = "attachment; filename=\"#{filename}\""
   headers['Expires'] = "0" 
  else
    headers["Content-Type"] ||= 'text/csv; charset=utf-8; header=present'   
    headers["Content-Disposition"] = "attachment; filename=\"#{filename}\""
  end  
  data_grid.view_context = CsvContent.new
  data_grid.prepare_data

  csv_string = CSV.generate(:col_sep => ';') do |csv|
    hide_column_indexes = []
    cols = []
    data_grid.columns.each_with_index do |col, i|
      if col.hide_in_export 
        hide_column_indexes << i
      else
        cols << col.title
      end
    end
    csv << cols
    data_grid.out_data.each_with_index do |row, row_index|
      data_row = []
      row.each_with_index do |row_col, i|
        next if (!data_grid.hidden_row.nil? and i == row.size-1)
        unless hide_column_indexes.include?(i)
          data_row << ((row_col.class == ActiveSupport::SafeBuffer) ? row_col.to_s.gsub(/<\/?[^>]*>/, "") : (row_col.class == String) ? row_col.gsub(/<\/?[^>]*>/, "") : row_col)
        end
      end
      unless data_grid.hidden_row.nil?
        data_row << data_grid.out_hidden_rows[row_index] 
      end
      csv << data_row
    end

    if data_grid.summary? 
      data_row = []
   data_grid.columns.each_with_index {|col, i| 
        data_row <<  data_grid.summaries[i].to_s unless hide_column_indexes.include?(i)
      } 
      csv << data_row
 end 

  end

  render :text => csv_string
end

#prepare_grid(&block) ⇒ Object 



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# File 'lib/data_grid/controller.rb', line 5

def prepare_grid(&block)
  # Build logic object
  data_grid = DataGrid::DataGridLogic.new(:params => params)
  block.call(data_grid)

  # Restore state
  if data_grid.state_saver and DataGrid.state_saver_method
    require "data_grid/#{DataGrid.state_saver_method}_state_saver"
    self.restore_state(data_grid)
  end

  # Get and save data from params
  data_grid.get_params_from_request
  self.save_state(data_grid) if data_grid.state_saver

  # Export on demand
  if data_grid.export_enabled and params["export_#{data_grid.name}"]
    require "data_grid/#{params["export_#{data_grid.name}"]}_exporter"
    self.export(data_grid, data_grid.export_filename)
  end
  
  data_grid
end

#restore_state(data_grid) ⇒ Object

Restore state from cookies



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# File 'lib/data_grid/cookies_state_saver.rb', line 26

def restore_state(data_grid)
  if cookies["data_grid_state_#{data_grid.name}"]
    state = Marshal.load(cookies["data_grid_state_#{data_grid.name}"])
    STATE_KEYS.each do |key|
      data_grid.send("#{key}=", state[key])
    end
  
    if state[:columns]
      state[:columns].each_pair do |k, v|
        data_grid.columns[k.to_i].filter_value = v if data_grid.columns[k.to_i]
      end
    end
  end
end

#save_state(data_grid) ⇒ Object

Save grid state in cookies



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# File 'lib/data_grid/cookies_state_saver.rb', line 9

def save_state(data_grid)
  cookies["data_grid_state_#{data_grid.name}"] ||= {}

  state = {}
  STATE_KEYS.each do |key|
    state[key] = data_grid.send(key)
  end
  
  data_grid.columns.each_with_index do |col, col_index|
    state[:columns] ||= {}
    state[:columns][col_index] = col.filter_value
  end
  
  cookies["data_grid_state_#{data_grid.name}"] = Marshal.dump(state)
end