Module: XlsPorter

Defined in:
lib/xls_porter.rb

Instance Method Summary collapse

Instance Method Details

#cleanup_tmp_file(file_path) ⇒ Object 



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# File 'lib/xls_porter.rb', line 104

def cleanup_tmp_file(file_path)
  File.delete(file_path) if File.exist?(file_path)
end

#model_to_xls(model) ⇒ Object 



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# File 'lib/xls_porter.rb', line 18

def model_to_xls(model)
  to_xls(model.all, model.column_names, model.name)
end

#store_uploaded_file(uploaded_file) ⇒ Object

sanitize and prefix filename with timestamp store the uploaded file



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# File 'lib/xls_porter.rb', line 24

def store_uploaded_file(uploaded_file)
  uploaded_file.original_filename = "#{Time.now.to_i}_#{File.basename(uploaded_file.original_filename)}"
  file = XlsUploader.new
  file.store!(uploaded_file)
  return file
end

#to_xls(list, columns, name) ⇒ Object 



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# File 'lib/xls_porter.rb', line 5

def to_xls(list, columns, name)
  book = Spreadsheet::Workbook.new
  sheet = book.create_worksheet :name => name
  row = sheet.row(0)
  columns.each {|column| row.push(column)}
  idx = 0
  list.each do |it|
    row = sheet.row(idx += 1)
    columns.each {|column| row.push(it[column])}
  end
  return book
end

#xls_to_model(xls_file_path, model, ignore = []) ⇒ Object 



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# File 'lib/xls_porter.rb', line 31

def xls_to_model(xls_file_path, model, ignore=[])
  #TODO exception handling

  book = Spreadsheet.open(xls_file_path)
  sheet = book.worksheet(0)
  columns = sheet.row(0)
  ignore_columns = (columns - model.column_names) + ignore
  id_idx = columns.find_index("id")
  updates = []
  # Read each row, skip the first (column names)
  sheet.each 1 do |row|
    id = row[id_idx]
    record = nil
    update = nil
    update_notes = nil
    if id.nil?
      record = model.new
      update = "new"
    else
      begin
        record = model.find(id)
        update = "exist"
      rescue
        record = model.new
        update = "new"
      end
    end
    (0..(columns.size - 1)).each do |i|
      column = columns[i]
      value = row[i]
      puts "Column: #{column} Value: #{value.inspect}"
      value = value.strip if value.is_a?(String)
      value = value.value if value.is_a?(Spreadsheet::Formula)
      if column == "id" and update == "new"
        record[column] = value
      elsif ignore_columns.include?(column)
        #skip if column is ignored
      elsif record[column].blank? and value.blank?
        #skip if both are either nil or empty
      elsif [DateTime, Time, Date].include?(value.class)
        record[column] = value if record[column].to_f != value.to_f
      else
        puts "Column: #{column} Record: #{record[column].to_s} Value: #{value.to_s}"
        if record[column] != value
          record[column] = value
          update = "updated" if update == "exist"
          update_notes = [] if update_notes.nil?
          update_notes << column
        end
      end
    end
    puts "Record ID:#{record.id} new? #{record.new_record?} persisted? #{record.persisted?}"
    puts "Record changed? #{not record.changed.empty?}"
    #track all updates
    if not record.changed.empty?
      begin
        puts "Trying to save record..."
        if record.save
          puts "Record #{record.class}:#{record.id} saved #{record.persisted?}"
        else
          puts "Record Error #{record.errors.messages.inspect}"
        end
      rescue Exception => exception
        update = "exception"
        update_notes = exception.to_s
        puts "Exception: #{exception.message}"
      end
      updates << record.attributes.merge({ 'update' => update, 'update_notes' => update_notes }) # if %w(new updated).include?(update) #not record.changed.empty?
    end
  end
  return {:columns => (%w(update update_notes) + columns), :updates => updates, :model => model.name}
end

#xls_upload_and_update_model(uploaded_file, model) ⇒ Object 



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# File 'lib/xls_porter.rb', line 108

def xls_upload_and_update_model(uploaded_file, model)
  file_path = store_uploaded_file(uploaded_file).store_path
  model_updates = xls_to_model(file_path, model)
  cleanup_tmp_file(file_path)
  return model_updates
end