Class: ActiveList::Generator

Inherits:
Object
  • Object
show all
Defined in:
lib/active_list/generator/finder.rb,
lib/active_list/generator.rb

Overview

Manage data query

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args, &_block) ⇒ Generator

Returns a new instance of Generator.



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# File 'lib/active_list/generator.rb', line 5

def initialize(*args, &_block)
  options = args.extract_options!
  @controller = options[:controller]
  name = args.shift || @controller.controller_name.to_sym
  model = (options[:model] || name).to_s.classify.constantize
  @collection = !!(model.name == @controller.controller_name.to_s.classify)
  @controller_method_name = "list#{'_' + name.to_s if name != @controller.controller_name.to_sym}"
  @view_method_name       = "_#{@controller.controller_name}_list_#{name}_tag"
  @records_variable_name  = "@#{name}"
  @table = ActiveList::Definition::Table.new(name, model, options)
  if block_given?
    yield @table
  else
    @table.load_default_columns
  end
  @parameters = { sort: :to_s, dir: :to_s }
  @parameters.merge!(page: :to_i, per_page: :to_i) if @table.paginate?
end

Instance Attribute Details

#controller ⇒ Object

Returns the value of attribute controller.



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# File 'lib/active_list/generator.rb', line 3

def controller
  @controller
end

#controller_method_name ⇒ Object

Returns the value of attribute controller_method_name.



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# File 'lib/active_list/generator.rb', line 3

def controller_method_name
  @controller_method_name
end

#records_variable_name ⇒ Object

Returns the value of attribute records_variable_name.



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# File 'lib/active_list/generator.rb', line 3

def records_variable_name
  @records_variable_name
end

#table ⇒ Object

Returns the value of attribute table.



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# File 'lib/active_list/generator.rb', line 3

def table
  @table
end

#view_method_name ⇒ Object

Returns the value of attribute view_method_name.



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# File 'lib/active_list/generator.rb', line 3

def view_method_name
  @view_method_name
end

Instance Method Details

#collection? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_list/generator.rb', line 24

def collection?
  @collection
end

#controller_method_code ⇒ Object 



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# File 'lib/active_list/generator.rb', line 36

def controller_method_code
  code = "# encoding: utf-8\n"
  code << "def #{controller_method_name}\n"
  code << session_initialization_code.dig
  code << "  respond_to do |format|\n"
  code << "    format.html do\n"
  code << "      if request.xhr?\n"
  code << renderer.remote_update_code.dig(4)
  code << "      else\n"
  code << "        render(inline: '<%=#{view_method_name}-%>')\n" # , layout: action_has_layout?
  code << "      end\n"
  code << "    end\n"
  for format, exporter in ActiveList::Exporters.hash
    code << "    format.#{format} do\n"
    code << exporter.new(self).send_data_code.dig(3)
    code << "    end\n"
  end
  code << "  end\n"
  # Save preferences of user
  if defined?(User) && User.instance_methods.include?(:preference)
    code << "  p = current_user.preference('list.#{view_method_name}', YAML::dump({}))\n"
    code << "  p.set! YAML::dump(#{var_name(:params)}.stringify_keys)\n"
  end
  code << "end\n"
  # code.split("\n").each_with_index{|l, x| puts((x+1).to_s.rjust(4)+": "+l)}
  unless ::Rails.env.production?
    file = ::Rails.root.join('tmp', 'code', 'active_list', 'controllers', controller.controller_path, controller_method_name + '.rb')
    FileUtils.mkdir_p(file.dirname)
    File.write(file, code)
  end
  code
end

#renderer ⇒ Object 



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# File 'lib/active_list/generator.rb', line 32

def renderer
  ActiveList::Renderers[@table.options[:renderer]].new(self)
end

#select_data_code(options = {}) ⇒ Object

Generate select code for the table taking all parameters in account



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# File 'lib/active_list/generator/finder.rb', line 5

def select_data_code(options = {})
  paginate = (options.key?(:paginate) ? options[:paginate] : @table.paginate?)
  # Check order
  unless @table.options.keys.include?(:order)
    columns = @table.table_columns
    @table.options[:order] = (columns.any? ? columns.first.name.to_sym : { id: :desc })
  end

  class_name = @table.model.name
  class_name = "(controller_name != '#{class_name.tableize}' ? controller_name.to_s.classify.constantize : #{class_name})" if collection?

  # Find data
  query_code = class_name.to_s
  query_code << scope_code if scope_code
  query_code << ".select(#{select_code})" if select_code
  query_code << ".where(#{conditions_code})" unless @table.options[:conditions].blank?
  query_code << ".joins(#{@table.options[:joins].inspect})" unless @table.options[:joins].blank?
  unless includes_reflections.empty?
    expr = includes_reflections.inspect[1..-2]
    query_code << ".includes(#{expr})"
    query_code << ".references(#{expr})"
  end

  code = ''
  code << "#{var_name(:count)} = #{query_code}.count\n"

  query_code << ".reorder(#{var_name(:order)})"

  if paginate
    code << "#{var_name(:limit)}  = (#{var_name(:params)}[:per_page] || 25).to_i\n"

    code << "if params[:page]\n"
    code << "  #{var_name(:page)} = (#{var_name(:params)}[:page] || 1).to_i\n"
    code << "elsif params['#{table.name}-id'] and #{var_name(:index)} = #{query_code}.pluck(:id).index(params['#{table.name}-id'].to_i)\n"
    # Find page of request element
    code << "  #{var_name(:page)} = (#{var_name(:index)}.to_f / #{var_name(:limit)}).floor + 1\n"
    code << "else\n"
    code << "  #{var_name(:page)} = 1\n"
    code << "end\n"
    code << "#{var_name(:page)}   = 1 if #{var_name(:page)} < 1\n"

    code << "#{var_name(:offset)} = (#{var_name(:page)} - 1) * #{var_name(:limit)}\n"
    code << "#{var_name(:last)}   = (#{var_name(:count)}.to_f / #{var_name(:limit)}).ceil.to_i\n"
    code << "#{var_name(:last)}   = 1 if #{var_name(:last)} < 1\n"

    code << "return #{view_method_name}(options.merge(page: 1)) if 1 > #{var_name(:page)}\n"
    code << "return #{view_method_name}(options.merge(page: #{var_name(:last)})) if #{var_name(:page)} > #{var_name(:last)}\n"
    query_code << ".offset(#{var_name(:offset)})"
    query_code << ".limit(#{var_name(:limit)})"
  end

  code << "#{records_variable_name} = #{query_code} || {}\n"
  code
end

#session_initialization_code ⇒ Object 



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# File 'lib/active_list/generator.rb', line 84

def session_initialization_code
  code = "options = {} unless options.is_a? Hash\n"
  code << "options.update(params)\n"
  if defined?(User) && User.instance_methods.include?(:preference)
    code << "#{var_name(:params)} = YAML::load(current_user.preference('list.#{view_method_name}', YAML::dump({})).value).symbolize_keys\n"
    code << "#{var_name(:params)} = {} unless #{var_name(:params)}.is_a?(Hash)\n"
  else
    code << "#{var_name(:params)} = {}\n"
  end
  code << "#{var_name(:params)}.update(options.symbolize_keys)\n"
  code << "unless #{var_name(:params)}[:hidden_columns].is_a? Array\n"
  code << "  #{var_name(:params)}[:hidden_columns] = #{@table.hidden_columns.map(&:name).map(&:to_sym).inspect}\n"
  code << "end\n"
  for parameter, convertor in @parameters.sort { |a, b| a[0].to_s <=> b[0].to_s }
    # expr  = "options.delete('#{@table.name}_#{parameter}') || options.delete('#{parameter}') || #{var_name(:params)}[:#{parameter}]"
    # expr += " || #{@table.options[parameter]}" unless @table.options[parameter].blank?
    # code << "#{var_name(:params)}[:#{parameter}] = (#{expr}).#{convertor}\n"
    expr = "#{var_name(:params)}[:#{parameter}]"
    expr = "(#{expr} || #{@table.options[parameter]})" unless @table.options[parameter].blank?
    code << "#{var_name(:params)}[:#{parameter}] = #{expr}.#{convertor}\n"
  end
  code << "params[:redirect] ||= request.fullpath unless request.xhr?\n"

  # Order
  code << "#{var_name(:order)} = #{@table.options[:order] ? @table.options[:order].inspect : 'nil'}\n"
  code << "if #{var_name(:col)} = {" + @table.sortable_columns.collect { |c| "'#{c.sort_id}' => '#{c.sort_expression}'" }.join(', ') + "}[#{var_name(:params)}[:sort]]\n"
  code << "  #{var_name(:params)}[:dir] = 'asc' unless #{var_name(:params)}[:dir] == 'asc' or #{var_name(:params)}[:dir] == 'desc'\n"
  code << "  null_pos = 'first' if #{var_name(:params)}[:dir] == 'asc'\n"
  code << "  null_pos = 'last' if #{var_name(:params)}[:dir] == 'desc'\n"
  code << "  #{var_name(:order)} = #{var_name(:col)} + ' ' + #{var_name(:params)}[:dir] + ' NULLS ' + null_pos \n"
  code << "end\n"

  code
end

#var_name(name) ⇒ Object 



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# File 'lib/active_list/generator.rb', line 28

def var_name(name)
  "_#{name}"
end

#view_method_code ⇒ Object 



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# File 'lib/active_list/generator.rb', line 69

def view_method_code
  code = "# encoding: utf-8\n"
  code << "def #{view_method_name}(options={}, &block)\n"
  code << session_initialization_code.dig
  code << renderer.build_table_code.dig
  code << "end\n"
  # code.split("\n").each_with_index{|l, x| puts((x+1).to_s.rjust(4)+": "+l)}
  unless ::Rails.env.production?
    file = ::Rails.root.join('tmp', 'code', 'active_list', 'views', controller.controller_path, view_method_name + '.rb')
    FileUtils.mkdir_p(file.dirname)
    File.write(file, code)
  end
  code
end