Module: Pincushion

Defined in:
lib/pincushion.rb,
lib/pincushion/plugins.rb,
lib/pincushion/version.rb,
lib/pincushion/plugins/csv_serializer.rb,
lib/pincushion/plugins/json_serializer.rb

Defined Under Namespace

Modules: InstanceMethods, ModuleMethods, Plugins, RootModuleMethods

Constant Summary collapse

DuplicateIdentifierError = 
Class.new(StandardError)
MissingIdentifierError = 
Class.new(StandardError)
MissingPredicateError = 
Class.new(StandardError)
VERSION = 
"0.1.3"

Class Method Summary collapse

Class Method Details

.from_csv(csv, *args) ⇒ Object 



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# File 'lib/pincushion/plugins/csv_serializer.rb', line 4

def self.from_csv(csv, *args)
  args << {} unless args.last.is_a?(Hash)
  args.last.merge!(Plugins::CsvSerializer::OPTS)
  from_rows(CSV.parse(csv, *args).map(&:to_hash))
end

.from_rows(rows) ⇒ Object 



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# File 'lib/pincushion.rb', line 5

def self.from_rows(rows)
  Module.new.module_eval do
    include Pincushion

    predicates = rows
                 .reduce(Set.new) { |a, e| a.merge(e.keys) }
                 .delete(:identifier)
    predicates(*predicates)

    rows.each do |row|
      row = row.dup
      identifier = row.delete(:identifier)
      true_predicates = row.each_pair.select { |_, v| v }.map { |k, _| k }
      that_is(*true_predicates).named(identifier)
    end

    self
  end
end

.included(mod) ⇒ Object

module InstanceMethods



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# File 'lib/pincushion.rb', line 182

def self.included(mod)
  mod.instance_eval do
    @identifiers = {}
    @predicate_pincushion_root = self

    extend ModuleMethods
    extend RootModuleMethods
    include InstanceMethods

    is_not(*predicates)
  end
end

.plugin(name) ⇒ Object 



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# File 'lib/pincushion/plugins.rb', line 6

def self.plugin(name)
  require "pincushion/plugins/#{name}"
  mod = Plugins.const_get(Plugins.camelize(name))
  extend mod::PincushionMethods if defined?(mod::PincushionMethods)
  @plugins ||= []
  @plugins << name
rescue LoadError
  raise LoadError, "Plugin not found: #{name}"
rescue NameError => e
  raise NameError, "#{e} for plugin: #{name}"
end

.plugins ⇒ Object 



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# File 'lib/pincushion/plugins.rb', line 2

def self.plugins
  @plugins || []
end

.validate(mod, preds) ⇒ Object 



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# File 'lib/pincushion.rb', line 25

def self.validate(mod, preds)
  violations = Set.new(preds) - mod.predicates
  return if violations.empty?
  fail MissingPredicateError,
       "Tried to set a value for unregistered predicate(s): "\
       "#{violations.inspect}"
end