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Contents
require_relative "handler"
require_relative "errors"
module Coach
class Router
ACTION_TRAITS = {
index: { method: :get },
show: { method: :get, url: ':id' },
create: { method: :post },
update: { method: :put, url: ':id' },
destroy: { method: :delete, url: ':id' }
}.each_value(&:freeze).freeze
def initialize(app)
@app = app
end
def draw(routes, base: nil, as: nil, constraints: nil, actions: [])
action_traits(actions).each do |action, traits|
route = routes.const_get(camel(action))
match(action_url(base, traits),
to: Handler.new(route),
via: traits[:method],
as: as,
constraints: constraints)
end
end
def match(url, **args)
@app.routes.draw do
match url, args
end
end
private
# Receives an array of symbols that represent actions for which the default traits
# should be used, and then lastly an optional trait configuration.
#
# Example is...
#
# [ :index, :show, { refund: { url: ':id/refund', method: 'post' } } ]
#
# ...which will load the default route for `show` and `index`, while also configuring
# a refund route.
def action_traits(list_of_actions)
if list_of_actions.last.is_a?(Hash)
*list_of_actions, traits = list_of_actions
end
list_of_actions.reduce(traits || {}) do |memo, action|
trait = ACTION_TRAITS.fetch(action) do
raise Errors::RouterUnknownDefaultAction, action
end
memo.merge(action => trait)
end
end
# Applies trait url to base, removing duplicate /'s
def action_url(base, traits)
[base, traits[:url]].compact.join('/').gsub(%r{/+}, '/')
end
# Turns a snake_case string/symbol into a CamelCase
def camel(snake_case)
snake_case.to_s.capitalize.gsub(/_./) { |match| match[1].upcase }
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems