Class: Ro::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/ro/node.rb,
lib/ro/node/list.rb

Defined Under Namespace

Classes: Asset, List

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ Node

Returns a new instance of Node.



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# File 'lib/ro/node.rb', line 9

def initialize(path)
  @path = Ro.realpath(path.to_s)
  @id   = File.basename(@path)
  @slug = Slug.for(@id)
  @type = File.basename(File.dirname(@path))
  @root = Ro::Root.new(File.dirname(File.dirname(@path)))
  @loaded = false
  @loading = false
  @attributes = Map.new
  @fields = Map.new
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/ro/node.rb', line 211

def method_missing(method, *args, &block)
  super if method.to_s == 'to_ary'

  Ro.log "Ro::Node(#{ identifier })#method_missing(#{ method.inspect }, #{ args.inspect })"

  key = method.to_s

  if @attributes.has_key?(key)
    return @attributes[key]
  end

  _load do
    return(
      if @attributes.has_key?(key)
        @attributes[key]
      else
        super
      end
    )
  end
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/ro/node.rb', line 61

def ==(other)
  attributes == other.attributes
end

#[](*args) ⇒ Object 



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# File 'lib/ro/node.rb', line 85

def [](*args)
  attributes.get(*args)
end

#_attributes_yml ⇒ Object 



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# File 'lib/ro/node.rb', line 444

def _attributes_yml
  File.join(@path, 'attributes.yml')
end

#_binding ⇒ Object 



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# File 'lib/ro/node.rb', line 411

def _binding
  Kernel.binding
end

#_cache_key ⇒ Object 



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# File 'lib/ro/node.rb', line 415

def _cache_key
  glob = File.join(@path, '**/**')

  entries = []

  Dir.glob(glob) do |entry|
    stat =
      begin
        File.stat(entry)
      rescue
        next
      end

    timestamp = [stat.ctime, stat.mtime].max
    relative_path = Ro.relative_path(entry, :to => @path)
    entries.push([relative_path, timestamp.iso8601(2)]) 
  end

  fingerprint = entries.map{|pair| pair.join('@')}.join(', ')

  md5 = Ro.md5(fingerprint)

  [@path, md5]
end

#_id ⇒ Object 



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# File 'lib/ro/node.rb', line 25

def _id
  @id
end

#_load(&block) ⇒ Object 



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# File 'lib/ro/node.rb', line 297

def _load(&block)
  unless @loaded
    if @loading
      return(block ? block.call : :loading)
    end

    @loading = true
    @loaded = _load_from_cache_or_disk
    @loading = false
  end

  block ? block.call : @loaded
end

#_load_assets ⇒ Object 



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# File 'lib/ro/node.rb', line 393

def _load_assets
  glob = File.join(@path, 'assets/**/**')
  node = self

  Dir.glob(glob) do |path|
    next if test(?d, path)

    relative_path = Ro.relative_path(path, :to => "#{ @path }/assets")

    url = url_for(relative_path)
    key = relative_path.split('/')

    key.unshift('urls')

    @attributes.set(key => url)
  end
end

#_load_attribute_files ⇒ Object 



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# File 'lib/ro/node.rb', line 354

def _load_attribute_files
  glob = File.join(@path, '**/**')
  node = self

  Dir.glob(glob) do |path|
    next if test(?d, path)

    basename = File.basename(path)
    next if basename == 'attributes.yml'

    relative_path = Ro.relative_path(path, :to => @path)
    next if relative_path =~ /^assets\//

    key = relative_path.split('.', 2).first.split('/')

    html = Ro.render(path, node)
    html = Ro.expand_asset_urls(html, node)

    @attributes.set(key => html)
  end
end

#_load_attributes_yml ⇒ Object 



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# File 'lib/ro/node.rb', line 338

def _load_attributes_yml
  if test(?s, _attributes_yml)
    buf = IO.binread(_attributes_yml)
    data = YAML.load(buf)
    data = data.is_a?(Hash) ? data : {'_' => data}

    @attributes.update(data)

    %w( assets ).each do |key|
      raise ArgumentError.new("attributes.yml may not contain the key '#{ key }'") if @attributes.has_key?(key)
    end

    @attributes
  end
end

#_load_from_cache ⇒ Object 



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# File 'lib/ro/node.rb', line 440

def _load_from_cache
  false
end

#_load_from_cache_or_disk ⇒ Object 



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# File 'lib/ro/node.rb', line 311

def _load_from_cache_or_disk
  cache_key = _cache_key

  cached = Ro.cache.read(cache_key)

  if cached
    Ro.log "loading #{ identifier } from cache"

    @attributes = Map.new.update(cached)

    return :cache
  else
    Ro.log "loading #{ identifier } from disk"

    @attributes = Map.new

    _load_attributes_yml
    _load_attribute_files
    _load_sources
    _load_assets

    Ro.cache.write(cache_key, @attributes)

    return :disk
  end
end

#_load_sources ⇒ Object 



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# File 'lib/ro/node.rb', line 376

def _load_sources
  glob = File.join(@path, 'assets/source/*')
  node = self

  Dir.glob(glob) do |path|
    next if test(?d, path)

    basename = File.basename(path)
    key, ext = basename.split('.', 2)

    next if basename == 'attributes.yml'

    value = Ro.render_source(path, node)
    @attributes.set([:assets, :source, basename] => value)
  end
end

#_path ⇒ Object 



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# File 'lib/ro/node.rb', line 41

def _path
  @path
end

#_slug ⇒ Object 



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# File 'lib/ro/node.rb', line 49

def _slug
  @slug
end

#_type ⇒ Object 



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# File 'lib/ro/node.rb', line 33

def _type
  @type
end

#asset_dir ⇒ Object 



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# File 'lib/ro/node.rb', line 93

def asset_dir
  File.join(path, 'assets')
end

#asset_path(*args, &block) ⇒ Object 



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# File 'lib/ro/node.rb', line 89

def asset_path(*args, &block)
  File.join(relative_path, 'assets')
end

#asset_paths ⇒ Object 



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# File 'lib/ro/node.rb', line 97

def asset_paths
  Dir.glob("#{ asset_dir }/**/**").select{|entry| test(?f, entry)}
end

#asset_urls ⇒ Object 



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# File 'lib/ro/node.rb', line 109

def asset_urls
  assets.map(&:url)
end

#assets ⇒ Object 



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# File 'lib/ro/node.rb', line 101

def assets
  asset_paths.map do |path|
    name = path.sub(asset_dir + "/", "")
    url = url_for(name)
    Asset.new(name, :path => path, :url => url)
  end
end

#attributes ⇒ Object 



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# File 'lib/ro/node.rb', line 233

def attributes
  _load{ @attributes }
end

#attributes=(attributes) ⇒ Object 



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# File 'lib/ro/node.rb', line 237

def attributes=(attributes)
  @attributes = attributes
end

#basename ⇒ Object 



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# File 'lib/ro/node.rb', line 73

def basename
  name
end

#get(*args) ⇒ Object 



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# File 'lib/ro/node.rb', line 81

def get(*args)
  attributes.get(*args)
end

#hash ⇒ Object 



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# File 'lib/ro/node.rb', line 57

def hash
  identifier.hash
end

#id ⇒ Object 



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# File 'lib/ro/node.rb', line 21

def id
  @id
end

#identifier ⇒ Object 



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# File 'lib/ro/node.rb', line 53

def identifier
  "#{ _type }/#{ _id }"
end

#inspect ⇒ Object 



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# File 'lib/ro/node.rb', line 65

def inspect
  identifier
end

#instance_eval(*args, &block) ⇒ Object 



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# File 'lib/ro/node.rb', line 241

def instance_eval(*args, &block)
  _load{ super }
end

#load!(&block) ⇒ Object 



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# File 'lib/ro/node.rb', line 293

def load!(&block)
  _load(&block)
end

#loaded ⇒ Object 



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# File 'lib/ro/node.rb', line 289

def loaded
  attributes
end

#node ⇒ Object 



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# File 'lib/ro/node.rb', line 77

def node
  self
end

#path ⇒ Object 



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# File 'lib/ro/node.rb', line 37

def path
  attributes[:path] || @path
end

#related(*args, &block) ⇒ Object 



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# File 'lib/ro/node.rb', line 245

def related(*args, &block)
  _load{
    related = @attributes.get(:related) || Map.new
    nodes = List.new(root)
    list = root.nodes
    which = Coerce.list_of_strings(args) 

    related.each do |relationship, value|
      unless which.empty?
        next unless which.include?(relationship.to_s)
      end

      type, names =
        case value
          when Hash
            value.to_a.first
          else
            [relationship, value]
        end

      names = Coerce.list_of_strings(names)

      names.each do |name|
        identifier = "#{ type }/#{ name }"
        node = list.index[identifier]
        node._load{ nodes.add(node) }
      end
    end

    case
      when block.nil?
        nodes

      when block
        nodes.where(&block)
    end
  }
end

#relative_path ⇒ Object 



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# File 'lib/ro/node.rb', line 206

def relative_path
  re = /^#{ Regexp.escape(Ro.root) }/
  @path.to_s.gsub(re, '')
end

#reload(&block) ⇒ Object 



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# File 'lib/ro/node.rb', line 284

def reload(&block)
  @loaded = false
  _load(&block)
end

#route(*args) ⇒ Object 



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# File 'lib/ro/node.rb', line 201

def route(*args)
  path_info = Ro.absolute_path_for(Ro.route, relative_path)
  [Ro.asset_host, path_info].compact.join('/')
end

#slug ⇒ Object 



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# File 'lib/ro/node.rb', line 45

def slug
  attributes[:slug] || @slug
end

#source_for(*args) ⇒ Object 



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# File 'lib/ro/node.rb', line 196

def source_for(*args)
  key = Ro.relative_path_for(:assets, :source, args).split('/')
  get(key)
end

#to_s ⇒ Object 



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# File 'lib/ro/node.rb', line 69

def to_s
  inspect
end

#type ⇒ Object 



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# File 'lib/ro/node.rb', line 29

def type
  attributes[:type] || @type
end

#url_for(*args, &block) ⇒ Object 



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# File 'lib/ro/node.rb', line 141

def url_for(*args, &block)
  options = Map.options_for!(args)

  cache_buster = options.delete('_') != false

  path_info = Ro.relative_path_for(args)

  path = File.join(@path.to_s, 'assets', path_info)

  glob = path_info.gsub(/[_-]/, '[_-]')

  globs = 
    [
      File.join(@path.to_s, 'assets', "#{ glob }"),
      File.join(@path.to_s, 'assets', "#{ glob }*"),
      File.join(@path.to_s, 'assets', "**/#{ glob }")
    ]

  candidates = globs.map{|glob| Dir.glob(glob)}.flatten.compact.uniq

  case candidates.size
    when 0
      raise ArgumentError.new("no asset matching #{ globs.inspect }")
    when 1
      path = candidates.first

      path_info = path.gsub(/^#{ Regexp.escape(Ro.root) }/, '')

      if cache_buster
        #options['_'] = Ro.md5(IO.binread(path))
        timestamp = File.stat(path).mtime.utc.to_i
        options['_'] = timestamp
      end
    else
      raise ArgumentError.new("too many assets (#{ candidates.inspect }) matching #{ globs.inspect }")
  end

  url = File.join(Ro.route, path_info)

  if options.empty?
    url
  else
    query_string = Ro.query_string_for(options)
    "#{ url }?#{ query_string }"
  end
end

#url_for?(*args, &block) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ro/node.rb', line 188

def url_for?(*args, &block)
  begin
    url_for(*args, &block)
  rescue
    nil
  end
end