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require 'generators/base'
require 'generators/generated_attribute'
module Rails
module Generators
class NamedBase < Base
argument :name, :type => :string
attr_reader :class_name, :singular_name, :plural_name, :table_name,
:class_path, :file_path, :class_nesting, :class_nesting_depth
alias :file_name :singular_name
class << self
# Add a class collisions name to be checked on class initialization. You
# can supply a hash with a :prefix or :suffix to be tested.
#
# ==== Examples
#
# check_class_collision :suffix => "Observer"
#
# If the generator is invoked with class name Admin, it will check for
# the presence of "AdminObserver".
#
def check_class_collision(options={})
@class_collisions = options
end
# Returns the class collisions for this class and retreives one from
# superclass. The from_superclass method used below is from Thor.
#
def class_collisions #:nodoc:
@class_collisions ||= from_superclass(:class_collisions, nil)
end
end
def initialize(*args) #:nodoc:
super
assign_names!(self.name)
parse_attributes! if respond_to?(:attributes)
if self.class.class_collisions
value = add_prefix_and_suffix(class_name, self.class.class_collisions)
class_collisions(value)
end
end
protected
def assign_names!(given_name) #:nodoc:
self.name, @class_path, @file_path, @class_nesting, @class_nesting_depth = extract_modules(given_name)
@class_name_without_nesting, @singular_name, @plural_name = inflect_names(self.name)
@table_name = if !defined?(ActiveRecord::Base) || ActiveRecord::Base.pluralize_table_names
plural_name
else
singular_name
end
@table_name.gsub! '/', '_'
if @class_nesting.empty?
@class_name = @class_name_without_nesting
else
@table_name = @class_nesting.underscore << "_" << @table_name
@class_name = "#{@class_nesting}::#{@class_name_without_nesting}"
end
end
# Convert attributes hash into an array with GeneratedAttribute objects.
#
def parse_attributes! #:nodoc:
self.attributes = (attributes || {}).map do |name, type|
Rails::Generators::GeneratedAttribute.new(name, type)
end
end
# Extract modules from filesystem-style or ruby-style path. Both
# good/fun/stuff and Good::Fun::Stuff produce the same results.
#
def extract_modules(name) #:nodoc:
modules = name.include?('/') ? name.split('/') : name.split('::')
name = modules.pop
path = modules.map { |m| m.underscore }
file_path = (path + [name.underscore]).join('/')
nesting = modules.map { |m| m.camelize }.join('::')
[name, path, file_path, nesting, modules.size]
end
# Receives name and return camelized, underscored and pluralized names.
#
def inflect_names(name) #:nodoc:
camel = name.camelize
under = camel.underscore
plural = under.pluralize
[camel, under, plural]
end
# Receives a name and add suffix and prefix values frrm hash.
#
def add_prefix_and_suffix(name, hash) #:nodoc:
"#{hash[:prefix]}#{name}#{hash[:suffix]}"
end
end
end
end
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