Class: Operations::Components::Policies

Inherits:
Prechecks show all
Defined in:
lib/operations/components/policies.rb

Overview

We are looking for the first policy failure to return because it does not make sense to check for all policy failures. One is more than enough to know that we are not allowed to call the operation.

If policy returns false then generic :unauthorized error code will be used. In case of Failure monad - the error code depends on the failure internal value. It can be a String, Symbol or even a Hash containing :error key.

Successful policies return either true or Success monad.

Constant Summary

Constants inherited from Base

Base::DEFAULT_NAMES_MAP, Base::MONADS_DO_WRAPPER_SIGNATURES

Instance Method Summary collapse

Methods inherited from Prechecks

#callable?, #required_context

Instance Method Details

#call(params, context) ⇒ Object 



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# File 'lib/operations/components/policies.rb', line 16

def call(params, context)
  first_failure = callable.lazy.filter_map do |entry|
    result_failure(entry.call(**context), entry)
  end.first

  result(
    params: params,
    context: context,
    errors: errors(normalize_failure([first_failure].compact))
  )
end