Module: Modulator

Defined in:
lib/modulator.rb,
lib/modulator/version.rb

Constant Summary collapse

LAMBDAS = 
{}
VERSION = 
"0.3.0"

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.registering_module ⇒ Object

Returns the value of attribute registering_module.



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# File 'lib/modulator.rb', line 12

def registering_module
  @registering_module
end

.stack ⇒ Object

Returns the value of attribute stack.



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# File 'lib/modulator.rb', line 12

def stack
  @stack
end

Class Method Details

.calculate_registry_key(mod, module_method) ⇒ Object

lambda definition reference



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# File 'lib/modulator.rb', line 98

def calculate_registry_key(mod, module_method)
  module_names = mod.to_s.split('::').map(&:downcase)
  "#{module_names.join('-')}-#{module_method}"
end

.generate_endoints ⇒ Object

delegate to stack instance



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# File 'lib/modulator.rb', line 136

def generate_endoints
  # add lambdas to stack
  puts 'Generating endpoints'
  LAMBDAS.each do |name, config|
    puts "- adding #{config.dig(:module, :name)}.#{config.dig(:module, :method)} to #{config.dig(:gateway, :path)}"
    stack.add_lambda_endpoint(
      gateway:  config[:gateway],
      mod:      config[:module],
      wrapper:  config[:wrapper]  || {},
      env:      config[:env]      || {},
      settings: config[:settings] || {}
    )
  end
end

.init_stack(app_name: Pathname.getwd.basename.to_s, s3_bucket:, **stack_opts) ⇒ Object

init humidifier stack instance



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# File 'lib/modulator.rb', line 118

def init_stack(app_name: Pathname.getwd.basename.to_s, s3_bucket:, **stack_opts)
  stack = StackBuilder.init({
      app_name:   app_name.camelize,
      s3_bucket:  s3_bucket,
    }.merge(stack_opts))

  # validate stack
  # puts 'Validating stack'
  # puts '- it is valid' if stack.valid?

  self.stack = stack
  generate_endoints if LAMBDAS.any?

  # return instance
  stack
end

.register(lambda_def, **opts) ⇒ Object

opts are for overrides



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# File 'lib/modulator.rb', line 15

def register(lambda_def, **opts) # opts are for overrides
  if lambda_def.is_a?(Hash)
    register_from_hash(lambda_def)
  else
    register_from_module(lambda_def, **opts)
    self.registering_module = lambda_def
    self
  end
end

.register_from_hash(hash) ⇒ Object 



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# File 'lib/modulator.rb', line 37

def register_from_hash(hash)
  LAMBDAS[hash[:name]] = {
    name:     hash[:name],
    gateway:  hash[:gateway],
    module:   hash[:module],
    wrapper:  hash[:wrapper]  || {},
    env:      hash[:env]      || {},
    settings: hash[:settings] || {}
  }
end

.register_from_module(mod, **opts) ⇒ Object 



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

def register_from_module(mod, **opts)
  mod.singleton_methods.sort.each do |module_method|
    module_name     = mod.to_s
    module_names    = module_name.split('::').map(&:downcase)
    verb            = 'GET'
    path_fragments  = module_names.dup

    # process parameters
    # method(a, b, c = 1, *args, d:, e: 2, **opts)
    # [[:req, :a], [:req, :b], [:opt, :c], [:rest, :args], [:keyreq, :d], [:key, :e], [:keyrest, :opts]]
    mod.method(module_method).parameters.each do |param|
      param_type = param[0]
      param_name = param[1]

      # collect required params
      path_fragments << ":#{param_name}" if param_type == :req

      # post if we have optional key param, ie. pet: {}
      verb = 'POST' if param_type == :key
    end

    # delete is a special case based on method name
    verb = 'DELETE' if %w[destroy delete remove implode].include? module_method.to_s

    # finalize path
    path_fragments << module_method
    path = path_fragments.join('/')
    registry_key = calculate_registry_key(mod, module_method)

    register_from_hash(
      {
        name: registry_key,
        gateway: {
          verb: opts.dig(module_method, :gateway, :verb) || verb,
          path: opts.dig(module_method, :gateway, :path) || path
        },
        module: {
          name:   module_name,
          method: module_method.to_s,
          path:   module_names.join('/') # file name
        },
        wrapper:  opts.dig(module_method, :wrapper) || opts[:wrapper],
        env:      opts.dig(module_method, :env),
        settings: opts.dig(module_method, :settings)
      }
    )
  end
end

.set_env_values(lambda_def) ⇒ Object

local gateway helper



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# File 'lib/modulator.rb', line 104

def set_env_values(lambda_def)
  # remove wrapper if already set
  %i(name method path).each{|key| ENV.delete("wrapper_#{key}")}

  # set env for each group
  %i(module gateway wrapper env).each do |group_key|
    lambda_def[group_key]&.each do |key, value|
      key = "#{group_key}_#{key}" if group_key != :env
      ENV[key.to_s] = value.to_s
    end
  end
end

.wrap_with(wrapper_mod, only: nil, except: nil) ⇒ Object 



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

def wrap_with(wrapper_mod, only: nil, except: nil)
  registering_module.singleton_methods.sort.each do |module_method|
    next if only && !Array(only).include?(module_method)
    next if except && Array(except).include?(module_method)
    LAMBDAS[calculate_registry_key(registering_module, module_method)][:wrapper] = {
      name:   wrapper_mod.to_s,
      path:   wrapper_mod.to_s.split('::').map(&:downcase).join('/'), # file name
      method: 'call'
    }
  end
end