engine/app/models/extensions/page/parse.rb

107 lines
3.3 KiB
Ruby

module Models
module Extensions
module Page
module Parse
extend ActiveSupport::Concern
included do
field :serialized_template, :type => Binary
field :template_dependencies, :type => Array, :default => []
field :snippet_dependencies, :type => Array, :default => []
attr_reader :template_changed
before_validation :serialize_template
after_save :update_template_descendants
validate :template_must_be_valid
scope :pages, lambda { |domain| { :any_in => { :domains => [*domain] } } }
end
module InstanceMethods
def template
@template ||= Marshal.load(read_attribute(:serialized_template).to_s) rescue nil
end
protected
def serialize_template
if self.new_record? || self.raw_template_changed?
@template_changed = true
@parsing_errors = []
begin
self._parse_and_serialize_template
rescue ::Liquid::SyntaxError => error
@parsing_errors << :liquid_syntax
rescue ::Locomotive::Liquid::PageNotFound => error
@parsing_errors << :liquid_extend
end
end
end
def _parse_and_serialize_template(context = {})
self.parse(context)
self._serialize_template
end
def _serialize_template
self.serialized_template = BSON::Binary.new(Marshal.dump(@template))
end
def parse(context = {})
self.disable_all_editable_elements
default_context = { :site => self.site, :page => self, :templates => [], :snippets => [] }
context = default_context.merge(context)
@template = ::Liquid::Template.parse(self.raw_template, context)
self.template_dependencies = context[:templates]
self.snippet_dependencies = context[:snippets]
@template.root.context.clear
end
def template_must_be_valid
@parsing_errors.try(:each) { |msg| self.errors.add :template, msg }
end
def update_template_descendants
return unless @template_changed == true
# we admit at this point that the current template is up-to-date
template_descendants = self.site.pages.any_in(:template_dependencies => [self.id]).to_a
# group them by fullpath for better performance
cached = template_descendants.inject({}) { |memo, page| memo[page.fullpath] = page; memo }
self._update_direct_template_descendants(template_descendants, cached)
# finally save them all
template_descendants.map(&:save)
end
def _update_direct_template_descendants(template_descendants, cached)
direct_descendants = template_descendants.select do |page|
((page.template_dependencies || []) - (self.template_dependencies || [])).size == 1
end
direct_descendants.each do |page|
page.send(:_parse_and_serialize_template, { :cached_parent => self, :cached_pages => cached })
page.send(:_update_direct_template_descendants, template_descendants, cached)
end
end
end
end
end
end
end