Class: Rackr

Inherits:
Object
  • Object
show all
Includes:
Callback, Utils
Defined in:
lib/rackr.rb,
lib/rackr/utils.rb,
lib/rackr/action.rb,
lib/rackr/router.rb,
lib/rackr/callback.rb,
lib/rackr/router/route.rb,
lib/rackr/router/errors.rb,
lib/rackr/router/endpoint.rb,
lib/rackr/action/callbacks.rb,
lib/rackr/router/path_route.rb,
lib/rackr/router/build_request.rb,
lib/rackr/router/dev_html/dump.rb,
lib/rackr/router/dev_html/errors.rb

Overview

Rackr is a simple router for Rack.

Defined Under Namespace

Modules: Action, Callback, Utils Classes: Dump, NotFound, Router

Constant Summary collapse

VERSION = 
'0.0.72'
HTTP_METHODS = 
%w[GET POST DELETE PUT TRACE OPTIONS PATCH].freeze

Instance Method Summary collapse

Methods included from Utils

#deep_hash_push, #deep_hash_set, #ensure_array

Methods included from Callback

#assign, assign, included

Constructor Details

#initialize(config = {}, before: [], after: []) ⇒ Rackr

Returns a new instance of Rackr.



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# File 'lib/rackr.rb', line 30

def initialize(config = {}, before: [], after: [])
  @router = Router.new(config, before: before, after: after)
end

Instance Method Details

#app ⇒ Object 



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# File 'lib/rackr.rb', line 42

def app(&)
  instance_eval(&)

  @router
end

#cache ⇒ Object 



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# File 'lib/rackr.rb', line 68

def cache
  @router.config&.dig(:deps, :cache)
end

#config ⇒ Object 



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# File 'lib/rackr.rb', line 52

def config
  @router.config
end

#db ⇒ Object 



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# File 'lib/rackr.rb', line 60

def db
  @router.config&.dig(:deps, :db)
end

#deps ⇒ Object 



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# File 'lib/rackr.rb', line 56

def deps
  @router.config[:deps]
end

#error(error_class_or_endpoint = nil, endpoint = nil, &block) ⇒ Object 



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# File 'lib/rackr.rb', line 91

def error(error_class_or_endpoint = nil, endpoint = nil, &block)
  if block_given?
    if error_class_or_endpoint
      @router.add_error(block, error_class_or_endpoint)
    else
      @router.add_error(block)
    end
  elsif endpoint
    @router.add_error(endpoint, error_class_or_endpoint)
  else
    @router.add_error(error_class_or_endpoint)
  end
end

#extend(mod) ⇒ Object 



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# File 'lib/rackr.rb', line 38

def extend(mod)
  self.class.extend(mod)
end

#include(mod) ⇒ Object 



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# File 'lib/rackr.rb', line 34

def include(mod)
  self.class.include(mod)
end

#log ⇒ Object 



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# File 'lib/rackr.rb', line 64

def log
  @router.config&.dig(:deps, :log)
end

#not_found(endpoint = -> {}, &block) ⇒ Object 



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# File 'lib/rackr.rb', line 83

def not_found(endpoint = -> {}, &block)
  if block_given?
    @router.add_not_found(block)
  else
    @router.add_not_found(endpoint)
  end
end

#resources(name, id: :id, path: nil, paths: {}, callbacks: [], before: [], after: [], &block) ⇒ Object 



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# File 'lib/rackr.rb', line 105

def resources(name, id: :id, path: nil, paths: {}, callbacks: [], before: [], after: [], &block)
  @nested_resources ||= []
  @nested_resources.push(name)

  infer_action_const = lambda do |action|
    scope_parts = @router.not_empty_scopes
                         .map(&:to_s)
                         .reject { |s| s.start_with?(':') }
                         .map(&:capitalize)

    parts = ['Actions'] + scope_parts + [name.to_s.capitalize, action]
    const_path = parts.join('::')

    Object.const_get(const_path) if Object.const_defined?(const_path)
  end

  infer_assign_const = lambda do
    parts = @nested_resources.map { |s| s.to_s.capitalize }
    const_path = "Callbacks::#{parts.join('::')}::Assign"
    Object.const_get(const_path) if Object.const_defined?(const_path)
  end

  actions = {
    index: { method: :get, path: nil, action: infer_action_const.call('Index') },
    new: { method: :get, path: 'new', action: infer_action_const.call('New') },
    create: { method: :post, path: nil, action: infer_action_const.call('Create') }
  }

  actions_for_id = {
    show: { method: :get, path: nil, action: infer_action_const.call('Show') },
    edit: { method: :get, path: 'edit', action: infer_action_const.call('Edit') },
    update: { method: :put, path: nil, action: infer_action_const.call('Update') },
    delete: { method: :delete, path: nil, action: infer_action_const.call('Delete') }
  }

  received_callbacks = Hash.new { |h, k| h[k] = { before: [], after: [] } }
  (callbacks || []).each do |callback_config|
    ensure_array(callback_config[:actions]).each do |action|
      received_callbacks[action][:before].concat(ensure_array(callback_config[:before]))
      received_callbacks[action][:after].concat(ensure_array(callback_config[:after]))
    end
  end

  (paths || {}).each do |action, new_path|
    if actions[action]
      actions[action][:path] = new_path
    elsif actions_for_id[action]
      actions_for_id[action][:path] = new_path
    end
  end

  block_for_id = proc do
    actions_for_id.each do |action_name, definition|
      next unless definition[:action]

      action_callbacks = received_callbacks[action_name]
      send(
        definition[:method],
        definition[:path],
        definition[:action],
        before: action_callbacks[:before],
        after: action_callbacks[:after]
      )
    end

    instance_eval(&block) if block_given?
  end

  scope_name = path || name.to_s
  assign_callback = infer_assign_const.call

  scope(scope_name, before:, after:) do
    actions.each do |action_name, definition|
      next unless definition[:action]

      action_callbacks = received_callbacks[action_name]
      send(
        definition[:method],
        definition[:path],
        definition[:action],
        before: action_callbacks[:before],
        after: action_callbacks[:after]
      )
    end

    if assign_callback
      scope(id.to_sym, before: assign_callback, &block_for_id)
    else
      scope(id.to_sym, &block_for_id)
    end
  end

  @nested_resources.pop
end

#routes ⇒ Object 



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# File 'lib/rackr.rb', line 48

def routes
  @router.routes
end

#scope(name = '', before: [], after: [], &block) ⇒ Object 



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# File 'lib/rackr.rb', line 72

def scope(name = '', before: [], after: [], &block)
  @router.append_scope(
    name,
    scope_befores: before,
    scope_afters: after
  )
  instance_eval(&block)

  @router.clear_last_scope
end