lib/alchemy/element_definition.rb
# frozen_string_literal: true
module Alchemy
class ElementDefinition
class << self
# Returns the definitions from elements.yml file.
#
# Place a +elements.yml+ file inside your apps +config/alchemy+ folder to define
# your own set of elements
#
def all
@definitions ||= read_definitions_file.map(&:with_indifferent_access)
end
# Add additional page definitions to collection.
#
# Useful for extending the elements from an Alchemy module.
#
# === Usage Example
#
# Call +Alchemy::ElementDefinition.add(your_definition)+ in your engine.rb file.
#
# @param [Array || Hash]
# You can pass a single element definition as Hash, or a collection of elements as Array.
#
def add(element)
all
if element.is_a?(Array)
@definitions += element
elsif element.is_a?(Hash)
@definitions << element
else
raise TypeError
end
end
# Returns one element definition by given name.
#
def get(name)
return {} if name.blank?
all.detect { |a| a["name"] == name }
end
def reset!
@definitions = nil
end
# The absolute +elements.yml+ file path
# @return [Pathname]
def definitions_file_path
Rails.root.join("config", "alchemy", "elements.yml")
end
private
# Reads the element definitions from +config/alchemy/elements.yml+.
#
def read_definitions_file
if File.exist?(definitions_file_path)
YAML.safe_load(
ERB.new(File.read(definitions_file_path)).result,
permitted_classes: YAML_PERMITTED_CLASSES,
aliases: true
) || []
else
raise LoadError,
"Could not find elements.yml file! Please run `rails generate alchemy:install`"
end
end
end
end
end