Class: Html2rss::Selectors::PostProcessors::Template

Inherits:
Base
  • Object
show all
Defined in:
lib/html2rss/selectors/post_processors/template.rb

Overview

Returns a formatted String according to the string pattern. It uses Kernel#format

It supports the format pattern %<key>s and %{key}, where key is the key of the selector. If %{self} is used, the selectors extracted value will be used.

Imagine this HTML:

  • Product

    23,42€

    • YAML usage example:

    selectors:
 items:
   selector: 'li'
 price:
   selector: '.price'
 title:
   selector: h1
   post_process:
     name: template
     string: '%{self} (%{price})'

    Would return:

    'Product (23,42€)'

    Instance Attribute Summary

    Attributes inherited from Base

    #context, #value

    Class Method Summary collapse

    Instance Method Summary collapse

    Methods inherited from Base

    assert_type, expect_options

    Constructor Details

    #initialize(value, context) ⇒ Template

    Returns a new instance of Template.

    Parameters:

    

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    # File 'lib/html2rss/selectors/post_processors/template.rb', line 47

def initialize(value, context)
  super

  @options = context[:options] || {}
  @scraper = context[:scraper]
  @item = context[:item]
  @string = @options[:string].to_s
end

    Class Method Details

    .validate_args!(value, context) ⇒ Object

    Raises:

    

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    # File 'lib/html2rss/selectors/post_processors/template.rb', line 37

def self.validate_args!(value, context)
  assert_type value, String, :value, context:

  string = context[:options]&.dig(:string).to_s
  raise InvalidType, 'The `string` template is absent.' if string.empty?
end

    Instance Method Details

    #get ⇒ String

    Returns:

    • (String) 
    

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    # File 'lib/html2rss/selectors/post_processors/template.rb', line 58

def get
  Html2rss::Config::DynamicParams.call(@string, {}, getter: method(:item_value), replace_missing_with: '')
end