Class: ActiveMappers::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/active_mappers.rb

Constant Summary collapse

@@renderers = 
{}
@@inheritance_column = 
{}

Class Method Summary collapse

Class Method Details

.acts_as_polymorph(**options) ⇒ Object 



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# File 'lib/active_mappers.rb', line 78

def self.acts_as_polymorph(**options)
  each do |resource|
    mapper = KeyTransformer.resource_to_mapper(resource, self)
    mapper.with(resource, default_options.merge(options))
  rescue NameError
    raise NotImplementedError, 'No mapper found for this type of resource'
  end
end

.all(collection, options = {}) ⇒ Object 



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# File 'lib/active_mappers.rb', line 143

def self.all(collection, options = {})
  collection.map { |el| one(el, options) }.compact
end

.attributes(*params) ⇒ Object 



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# File 'lib/active_mappers.rb', line 27

def self.attributes(*params)
  each do |resource|
    h = {}
    params.each do |param|
      h[param] = resource.try(param)
    end
    h
  end
end

.default_options ⇒ Object 



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# File 'lib/active_mappers.rb', line 179

def self.default_options
  { rootless: true, fallback_on_missing_scope: true }
end

.delegate(*params) ⇒ Object 



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# File 'lib/active_mappers.rb', line 37

def self.delegate(*params)
  delegator = params.last[:to]
  params.pop
  each do |resource|
    h = {}
    params.each do |param|
      h[param] = delegator.to_s.split('.').inject(resource, :try).try(param)
    end
    h
  end
end

.each(&block) ⇒ Object 



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# File 'lib/active_mappers.rb', line 87

def self.each(&block)
  # puts "[l. #{__LINE__}] [#{name}] each"
  @@renderers[name] = (@@renderers[name] || []) << block
end

.evaluate_scopes(args, options) ⇒ Object 



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# File 'lib/active_mappers.rb', line 105

def self.evaluate_scopes(args, options)
  # puts "[l. #{__LINE__}] [#{name}] evaluate_scopes #{options}"
  class_to_call = begin
    "::#{name}Scope#{options[:scope].capitalize}".constantize
  rescue
    if options[:fallback_class]
      options[:fallback_class]
    elsif options[:fallback_on_missing_scope]
      options.delete :scope
      self
    else
      raise("ActiveMappers [#{name}] No scope named #{options[:scope]} found")
    end
  end
  # puts "[l.#{__LINE__}] evaluate_scopes class_to_call -> #{class_to_call}"
  return class_to_call.with(args, options.merge(initial_mapper: self))
end

.inheritance_column(val) ⇒ Object 



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# File 'lib/active_mappers.rb', line 23

def self.inheritance_column(val)
  @@inheritance_column[name] = val
end

.inherited(subclass) ⇒ Object 



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# File 'lib/active_mappers.rb', line 19

def self.inherited(subclass)
  Handlers::Inheritance.new(subclass, self).handle
end

.one(resource, options = {}) ⇒ Object 



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# File 'lib/active_mappers.rb', line 147

def self.one(resource, options = {})
  # puts "[l.#{__LINE__}] [#{name}] ONE - options: #{options.inspect} - inheritance_column: #{@@inheritance_column[name]}"
  return nil unless resource

  if @@inheritance_column[name] && !options[:fallback_class]
    main_mapper = KeyTransformer.resource_to_mapper(resource, self)
    # puts "[l.#{__LINE__}] [#{name}] ONE - main_mapper #{main_mapper}"
    mapper = options[:scope] ? (KeyTransformer.resource_to_mapper(resource, self, options[:scope]) rescue main_mapper) : main_mapper
    # puts "[l.#{__LINE__}] [#{name}] ONE - mapper #{mapper}"
    if name != mapper&.name
      return mapper.with(resource, options.merge(rootless: true, fallback_class: options[:initial_mapper]))
    end
  end

  return {} if @@renderers[name].nil? # Mapper is empty

  # base_mapper = name.rpartition('::').first

  # renderers = ancestors.select { |it| it.name.start_with?(base_mapper) }.map do |ancestor|
  #   puts "---> #{ancestor.name}"
  #   @@renderers[ancestor.name].map do |renderer|
  #     renderer.call(resource, options[:context])
  #   end.reduce(&:merge)
  # end.reduce(&:merge)

  renderers = @@renderers[name].map do |renderer|
    renderer.call(resource, options[:context])
  end.reduce(&:merge)

  KeyTransformer.format_keys(renderers)
end

.polymorphic(key, **options) ⇒ Object 



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# File 'lib/active_mappers.rb', line 66

def self.polymorphic(key, **options)
  each do |resource, context|
    options[:context] = context
    if polymorphic_resource = resource.send("#{key}_type")
      resource_mapper = "#{KeyTransformer.base_namespace(self)}::#{polymorphic_resource}Mapper".constantize
      { key => resource_mapper.with(resource.send(key), default_options.merge(options)) }
    else
      {}
    end
  end
end

.relation(key, mapper = nil, **options) ⇒ Object 



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# File 'lib/active_mappers.rb', line 49

def self.relation(key, mapper = nil, **options)
  path = options[:optional_path] || key
  each do |resource|
    mapper_to_use = if mapper
      mapper
    else
      relation_class_name = resource.class&.reflect_on_association(options[:optional_path] || key)&.class_name
      raise "undefined relation : #{key.to_s}" if (mapper.nil? && relation_class_name.nil?)
      KeyTransformer.resource_class_to_mapper(relation_class_name.dup, self)
    end

    raise "'#{mapper_to_use.name}' should be a mapper" unless mapper_to_use.ancestors.map(&:to_s).include?("ActiveMappers::Base")

    { key => mapper_to_use.with(path.to_s.split('.').inject(resource, :try), default_options.merge(options)) }
  end
end

.render_with_root(args, options = {}) ⇒ Object 



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# File 'lib/active_mappers.rb', line 132

def self.render_with_root(args, options = {})
  resource_name = options[:root]
  resource_name ||= KeyTransformer.apply_on(self.name)

  if args.respond_to?(:each)
    { resource_name.to_s.pluralize.to_sym => all(args, options) }
  else
    { resource_name.to_s.singularize.to_sym => one(args, options) }
  end
end

.scope(*params, &block) ⇒ Object 



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# File 'lib/active_mappers.rb', line 123

def self.scope(*params, &block)
  # puts "[l.#{__LINE__}] [#{name}] CREATING SCOPE CLASSES (name: #{name} | params: #{params.inspect}) ===> ::#{name}Scope#{params.first.capitalize}"
  raise "ActiveMappers [#{name}] scope must be a block" if block.nil? || !block.respond_to?(:call)
  params.each do |param|
    block_content = Ruby2Ruby.new.process(RubyParser.new.process(block.source).to_a.last)
    eval("class ::#{name}Scope#{param.capitalize} < ::#{name} ; #{block_content}; end")
  end
end

.with(args, options = {}) ⇒ Object 



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# File 'lib/active_mappers.rb', line 92

def self.with(args, options = {})
  # puts "[l. #{__LINE__}] WITH - #{name} - #{options}"
  if options[:scope].present? && !name.include?('Scope')
    return evaluate_scopes(args, options)
  end
  response = if options[:rootless]
    args.respond_to?(:each) ? all(args, options) : one(args, options)
  else
    render_with_root(args, options)
  end
  response
end