Module: CFoundry::V2::ModelMagic

Included in:
Model
Defined in:
lib/cfoundry/v2/model_magic.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#scoped_organization ⇒ Object (readonly)

Returns the value of attribute scoped_organization.



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# File 'lib/cfoundry/v2/model_magic.rb', line 16

def scoped_organization
  @scoped_organization
end

#scoped_space ⇒ Object (readonly)

Returns the value of attribute scoped_space.



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# File 'lib/cfoundry/v2/model_magic.rb', line 16

def scoped_space
  @scoped_space
end

Class Method Details

.params_from(args) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 447

def params_from(args)
  options, _ = args
  options ||= {}
  options[:depth] ||= 1

  params = {}
  options.each do |k, v|
    case k
    when :depth
      params[:"inline-relations-depth"] = v
    when :query
      params[:q] = v.join(":")
    end
  end

  params
end

.validate_type(val, type) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 441

def validate_type(val, type)
  unless value_matches?(val, type)
    raise CFoundry::Mismatch.new(type, val)
  end
end

.value_matches?(val, type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cfoundry/v2/model_magic.rb', line 415

def value_matches?(val, type)
  case type
  when Class
    val.is_a?(type)
  when Regexp
    val.is_a?(String) && val =~ type
  when :url
    value_matches?(val, URI::regexp(%w(http https)))
  when :https_url
    value_matches?(val, URI::regexp("https"))
  when :boolean
    val.is_a?(TrueClass) || val.is_a?(FalseClass)
  when Array
    val.all? do |x|
      value_matches?(x, type.first)
    end
  when Hash
    val.is_a?(Hash) &&
      type.all? { |name, subtype|
        val.key?(name) && value_matches?(val[name], subtype)
      }
  else
    val.is_a?(Object.const_get(type.to_s.capitalize))
  end
end

Instance Method Details

#attribute(name, type, opts = {}) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 136

def attribute(name, type, opts = {})
  attributes[name] = opts

  default = opts[:default]

  if has_default = opts.key?(:default)
    defaults[name] = default
  end

  define_method(name) do
    return @cache[name] if @cache.key?(name)

    @cache[name] = manifest[:entity][name] || default
  end

  define_method(:"#{name}=") do |val|
    unless has_default && val == default
      ModelMagic.validate_type(val, type)
    end

    @cache[name] = val

    @manifest ||= {}
    @manifest[:entity] ||= {}

    old = @manifest[:entity][name]
    @changes[name] = [old, val] if old != val
    @manifest[:entity][name] = val

    @diff[name] = val
  end
end

#attributes ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 29

def attributes
  @attributes ||= {}
end

#defaults ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 25

def defaults
  @defaults ||= {}
end

#has_summary(actions = {}) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 341

def has_summary(actions = {})
  define_method(:summary) do
    @client.base.request_path(
      Net::HTTP::Get,
      ["v2", "#{object_name}s", @guid, "summary"],
      :accept => :json)
  end

  define_method(:summarize!) do |*args|
    body, _ = args

    body ||= summary

    body.each do |key, val|
      if act = actions[key]
        instance_exec(val, &act)

      elsif self.class.attributes[key]
        self.send(:"#{key}=", val)

      elsif self.class.to_many_relations[key]
        singular = key.to_s.sub(/s$/, "").to_sym

        vals = val.collect do |sub|
          obj = @client.send(singular, sub[:guid], true)
          obj.summarize! sub
          obj
        end

        self.send(:"#{key}=", vals)

      elsif self.class.to_one_relations[key]
        obj = @client.send(key, val[:guid], true)
        obj.summarize! val

        self.send(:"#{key}=", obj)
      end
    end

    nil
  end
end

#inherited(klass) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 41

def inherited(klass)
  singular = klass.object_name
  plural = :"#{singular}s"

  BaseClientMethods.module_eval do
    define_method(singular) do |guid, *args|
      get("v2", plural, guid, :accept => :json,
          :params => ModelMagic.params_from(args))
    end

    define_method(:"create_#{singular}") do |payload|
      post(payload, "v2", plural, :content => :json, :accept => :json)
    end

    define_method(:"delete_#{singular}") do |guid|
      delete("v2", plural, guid)
      true
    end

    define_method(:"update_#{singular}") do |guid, payload|
      put(payload, "v2", plural, guid, :content => :json, :accept => :json)
    end

    define_method(plural) do |*args|
      all_pages(
        get("v2", plural, :accept => :json,
            :params => ModelMagic.params_from(args)))
    end
  end

  ClientMethods.module_eval do
    define_method(singular) do |*args|
      guid, partial, _ = args

      x = klass.new(guid, self, nil, partial)

      # when creating an object, automatically set the org/space
      unless guid
        if klass.scoped_organization && current_organization
          x.send(:"#{klass.scoped_organization}=", current_organization)
        end

        if klass.scoped_space && current_space
          x.send(:"#{klass.scoped_space}=", current_space)
        end
      end

      x
    end

    define_method(plural) do |*args|
      # use current org/space
      if klass.scoped_space && current_space
        current_space.send(plural, *args)
      elsif klass.scoped_organization && current_organization
        current_organization.send(plural, *args)
      else
        @base.send(plural, *args).collect do |json|
          send(:"make_#{singular}", json)
        end
      end
    end

    define_method(:"#{singular}_from") do |path, *args|
      send(
        :"make_#{singular}",
        @base.request_path(
          Net::HTTP::Get,
          path,
          :accept => :json,
          :params => ModelMagic.params_from(args)))
    end

    define_method(:"#{plural}_from") do |path, *args|
      objs = @base.all_pages(
        @base.request_path(
          Net::HTTP::Get,
          path,
          :accept => :json,
          :params => ModelMagic.params_from(args)))

      objs.collect do |json|
        send(:"make_#{singular}", json)
      end
    end

    define_method(:"make_#{singular}") do |json|
      klass.new(
        json[:metadata][:guid],
        self,
        json)
    end
  end
end

#object_name ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 18

def object_name
  @object_name ||=
    name.split("::").last.gsub(
      /([a-z])([A-Z])/,
      '\1_\2').downcase.to_sym
end

#queryable_by(*names) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 384

def queryable_by(*names)
  klass = self
  singular = object_name
  plural = :"#{singular}s"

  query = QUERIES[singular]

  query.module_eval do
    names.each do |name|
      define_method(:"#{singular}_by_#{name}") do |*args|
        send(:"#{plural}_by_#{name}", *args).first
      end

      define_method(:"#{plural}_by_#{name}") do |val, *args|
        options, _ = args
        options ||= {}
        options[:query] = [name, val]

        query_target(klass).send(plural, options)
      end
    end
  end

  const_set(:Queries, query)

  ClientMethods.module_eval do
    include query
  end
end

#scoped_to_organization(relation = :organization) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 169

def scoped_to_organization(relation = :organization)
  @scoped_organization = relation
end

#scoped_to_space(relation = :space) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 173

def scoped_to_space(relation = :space)
  @scoped_space = relation
end

#to_many(plural, opts = {}) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 233

def to_many(plural, opts = {})
  to_many_relations[plural] = opts

  singular = plural.to_s.sub(/s$/, "").to_sym

  include QUERIES[singular]

  object = opts[:as] || singular
  plural_object = :"#{object}s"

  kls = object.to_s.capitalize.gsub(/(.)_(.)/) do
    $1 + $2.upcase
  end

  define_method(plural) do |*args|
    opts, _ = args
    opts ||= {}

    if opts.empty? && cache = @cache[plural]
      return cache
    end

    if @manifest && @manifest[:entity].key?(plural) && opts.empty?
      objs = @manifest[:entity][plural]

      if query = opts[:query]
        find_by, find_val = query
        objs = objs.select { |o| o[:entity][find_by] == find_val }
      end

      res =
        objs.collect do |json|
          @client.send(:"make_#{object}", json)
        end
    else
      res =
        @client.send(
          :"#{plural_object}_from",
          "/v2/#{object_name}s/#@guid/#{plural}",
          opts)
    end

    if opts.empty?
      @cache[plural] = res
    end

    res
  end

  define_method(:"#{plural}_url") do
    manifest[:entity][:"#{plural}_url"]
  end

  define_method(:"add_#{singular}") do |x|
    ModelMagic.validate_type(x, CFoundry::V2.const_get(kls))

    if cache = @cache[plural]
      cache << x unless cache.include?(x)
    end

    @client.base.request_path(
      Net::HTTP::Put,
      ["v2", "#{object_name}s", @guid, plural, x.guid],
      :accept => :json)
  end

  define_method(:"remove_#{singular}") do |x|
    ModelMagic.validate_type(x, CFoundry::V2.const_get(kls))

    if cache = @cache[plural]
      cache.delete(x)
    end

    @client.base.request_path(
      Net::HTTP::Delete,
      ["v2", "#{object_name}s", @guid, plural, x.guid],
      :accept => :json)
  end

  define_method(:"#{plural}=") do |xs|
    klass = CFoundry::V2.const_get(kls)

    ModelMagic.validate_type(xs, [klass])

    @manifest ||= {}
    @manifest[:entity] ||= {}

    old = @manifest[:entity][:"#{singular}_guids"]
    if old != xs.collect(&:guid)
      old_objs =
        if all = @manifest[:entity][plural]
          all.collect do |m|
            klass.new(@client, m[:metadata][:guid], m)
          end
        else
          old.collect { |id| klass.new(@client, id) }
        end

      @changes[name] = [old_objs, val]
    end

    @cache[plural] = xs

    @manifest[:entity][:"#{singular}_guids"] =
      @diff[:"#{singular}_guids"] = xs.collect(&:guid)
  end
end

#to_many_relations ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 37

def to_many_relations
  @to_many_relations ||= {}
end

#to_one(name, opts = {}) ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 177

def to_one(name, opts = {})
  to_one_relations[name] = opts

  obj = opts[:as] || name
  kls = obj.to_s.capitalize.gsub(/(.)_(.)/) do
    $1 + $2.upcase
  end

  default = opts[:default]

  if has_default = opts.key?(:default)
    defaults[:"#{name}_guid"] = default
  end

  define_method(name) do
    return @cache[name] if @cache.key?(name)

    @cache[name] =
      if @manifest && @manifest[:entity].key?(name)
        @client.send(:"make_#{obj}", @manifest[:entity][name])
      elsif url = send("#{name}_url")
        @client.send(:"#{obj}_from", url)
      else
        default
      end
  end

  define_method(:"#{name}_url") do
    manifest[:entity][:"#{name}_url"]
  end

  define_method(:"#{name}=") do |val|
    klass = CFoundry::V2.const_get(kls)

    unless has_default && val == default
      ModelMagic.validate_type(val, klass)
    end

    @manifest ||= {}
    @manifest[:entity] ||= {}

    old = @manifest[:entity][:"#{name}_guid"]
    if old != val.guid
      old_obj = klass.new(@client, old, @manifest[:entity][name])

      @changes[name] = [old_obj, val]
    end

    @cache[name] = val

    @manifest[:entity][name] = val.manifest
    @manifest[:entity][:"#{name}_guid"] =
      @diff[:"#{name}_guid"] = val && val.guid
  end
end

#to_one_relations ⇒ Object 



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# File 'lib/cfoundry/v2/model_magic.rb', line 33

def to_one_relations
  @to_one_relations ||= {}
end