Class: TableForHelper::Builder

Inherits:
Object
  • Object
show all
Includes:
ActionView::Helpers::TagHelper
Defined in:
lib/table_for_helper/builder.rb

Instance Method Summary collapse

Constructor Details

#initialize(collection, options = nil) {|_self| ... } ⇒ Builder

Initialize variables

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/table_for_helper/builder.rb', line 6

def initialize collection, options = nil
  @collection = collection
  @options = options.symbolize_keys
  @model = collection.first.class

  @head = {}
  @body = {}
  @footer = {}
  @footer_options = {}
  
  yield self if block_given?
end

Instance Method Details

#column(name, title = nil, options = nil, &block) ⇒ Object

Add a new column to the table



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# File 'lib/table_for_helper/builder.rb', line 20

def column name, title = nil, options = nil, &block
  # Move a value from the title to options variable for 2 params usage
  if title.is_a? Hash
    options = title
    title = nil
  end

  # Take a title for this column from the dictionary
  if !title
    # A title for a reference
    if name.is_a? Class
      title = name.model_name.human
    # A title for an model attribute
    else
      title = @model.human_attribute_name(name)
    end
  end

  # Create a html head cell
  @head[name] = content_tag('th', title, options)

  # Save a builder for rows
  @body[name] = block if block_given?
end

#footer(name, options = nil, &block) ⇒ Object

Add a footer row column value



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# File 'lib/table_for_helper/builder.rb', line 46

def footer name, options = nil, &block
  # Save a builder for a footer cell
  @footer[name] = block if block_given?

  # Save options for a footer cell
  @footer_options[name] = options if options
end

#to_html ⇒ Object

Generate a html



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# File 'lib/table_for_helper/builder.rb', line 55

def to_html
  # Add all model attributes if no block given
  @model.attribute_names.each{|name| column(name)} if @head.empty?

  # Save list of view attributes
  columns = @head.keys

  # Create a html row tag for head cells
  head = content_tag('tr', @head.values.join.html_safe)

  # Construct body html rows
  body = ''
  @collection.each do |resource|
    row = ''
    columns.each do |column|
      if @body[column]
        cell = @body[column].call(resource)
      else
        cell = resource[column]
      end
      row << content_tag('td', cell.to_s)
    end
    body << content_tag('tr', row.html_safe)
  end

  # Construct the footer row
  footer = ''
  if !@footer.empty?
    columns.each do |column|
      if @footer[column]
        footer << content_tag('td', @footer[column].call(@collection), @footer_options[column])
      else
        footer << content_tag('td')
      end
    end
    footer = content_tag('tr', footer.html_safe)
  end

  # Join all table parts, put it to a table tag and return
  table = ''
  table << content_tag('thead', head)
  table << content_tag('tbody', body.html_safe + footer.html_safe)
  content_tag('table', table.html_safe, @options)
end