Class: JekyllAllCollections::AllCollectionsTag

Inherits:
JekyllSupport::JekyllTag show all
Includes:
JekyllPluginSupportVersion
Defined in:
lib/jekyll_all_collections/all_collections_tag.rb

Constant Summary

Constants included from JekyllPluginSupportVersion

JekyllPluginSupportVersion::VERSION

Instance Attribute Summary

Attributes inherited from JekyllSupport::JekyllTag

#argument_string, #helper, #line_number, #logger, #page, #site

Attributes included from JekyllSupportError

#logger, #page

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from JekyllSupport::JekyllTag

#initialize, #render, #set_error_context

Methods included from ToString

#to_s

Methods included from JekyllSupportError

#exit_without_stack_trace, #format_error_message, #maybe_reraise_error, #remove_ansi_color, #warn_short_trace

Constructor Details

This class inherits a constructor from JekyllSupport::JekyllTag

Class Method Details

.create_lambda_string(criteria) ⇒ Object

Descending sort keys are preceded by a minus sign, and reverse the order of comparison

Parameters:

  • criteria —

    String Examples: ‘date’, ‘-date’, ‘last_modified’, ‘-last_modified’,

    ‘date’, ‘last_modified], [’-date’, ‘-last_modified’], [‘date’, ‘-last_modified’

Returns:

  • values: “->(a, b) { [a.last_modified] <=> [b.last_modified] }” (ascending) “->(a, b) { [b.last_modified] <=> [a.last_modified] }” (descending) “->(a, b) { [a.last_modified, a.date] <=> [b.last_modified, b.date] }” (descending last_modified, ascending date) “->(a, b) { [a.last_modified, b.date] <=> [b.last_modified, a.date] }” (ascending last_modified, descending date)



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# File 'lib/jekyll_all_collections/all_collections_tag.rb', line 32

def self.create_lambda_string(criteria)
  criteria_lhs_array = []
  criteria_rhs_array = []
  verify_sort_by_type(criteria).each do |c|
    descending_sort = c.start_with? '-'
    c.delete_prefix! '-'
    abort("Error: '#{c}' is not a valid sort field. Valid field names are: #{CRITERIA.join ', '}") \
      unless CRITERIA.include?(c)
    criteria_lhs_array << (descending_sort ? "b.#{c}" : "a.#{c}")
    criteria_rhs_array << (descending_sort ? "a.#{c}" : "b.#{c}")
  end
  "->(a, b) { [#{criteria_lhs_array.join(', ')}] <=> [#{criteria_rhs_array.join(', ')}] }"
end

.verify_sort_by_type(sort_by) ⇒ Object 



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# File 'lib/jekyll_all_collections/all_collections_tag.rb', line 46

def self.verify_sort_by_type(sort_by)
  case sort_by
  when Array
    sort_by
  when Enumerable
    sort_by.to_a
  when Date
    [sort_by.to_i]
  when String
    [sort_by]
  else
    abort "Error: @sort_by was specified as '#{sort_by}'; it must either be a string or an array of strings"
  end
end

Instance Method Details

#render_impl ⇒ String

Method prescribed by JekyllTag.

Returns:

  • (String) 


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# File 'lib/jekyll_all_collections/all_collections_tag.rb', line 15

def render_impl
  parse_arguments # Defines instance variables like @sort_by
  sort_lambda = init_sort_by @sort_by
  generate_output sort_lambda
rescue StandardError => e
  ::JekyllSupport.error_short_trace @logger, e
  # ::JekyllSupport.warn_short_trace @logger, e
end