Module: Modulator

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

Constant Summary collapse

VERSION = 
"0.1.1"
LAMBDAS = 
{}

Class Method Summary collapse

Class Method Details

.add_lambda(lambda_def, **opts) ⇒ Object

opts are for overrides



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# File 'lib/modulator.rb', line 11

def add_lambda(lambda_def, **opts) # opts are for overrides
  if lambda_def.is_a?(Hash)
    add_lambda_from_hash(lambda_def)
  else
    add_lambda_from_module(lambda_def, **opts)
  end
end

.add_lambda_from_hash(hash) ⇒ Object 



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# File 'lib/modulator.rb', line 19

def add_lambda_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

.add_lambda_from_module(mod, **opts) ⇒ Object 



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

def add_lambda_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 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('/')

    add_lambda_from_hash(
      {
        name: "#{module_names.join('-')}-#{module_method}",
        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

.init_stack(app_name:, bucket:, **stack_opts) ⇒ Object 



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# File 'lib/modulator.rb', line 88

def init_stack(app_name:, bucket:, **stack_opts)
  stack = AwsStackBuilder.init({
      app_name: app_name.camelize,
      bucket: bucket,
    }.merge(stack_opts))

  # 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

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

  # return humidifier instance
  stack
end

.set_env(lambda_def) ⇒ Object 



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# File 'lib/modulator.rb', line 78

def set_env(lambda_def)
  # remove wrapper if already set
  %w(name method path).each{|name| ENV.delete('wrapper_' + name)}
  # set env values
  lambda_def[:module].each{|name, value| ENV['module_' + name.to_s] = value.to_s}
  lambda_def[:gateway].each{|name, value| ENV['gateway_' + name.to_s] = value.to_s}
  lambda_def[:wrapper]&.each{|name, value| ENV['wrapper_' + name.to_s] = value.to_s}
  lambda_def[:env]&.each{|name, value| ENV[name.to_s] = value.to_s} # custom values
end