Class: Miau::PolicyStorage

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/miau/storage.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PolicyStorage

Returns a new instance of PolicyStorage.



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# File 'lib/miau/storage.rb', line 22

def initialize
  reset
end

Instance Attribute Details

#instances ⇒ Object (readonly)

{ posts: PostsPolicy.new }



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# File 'lib/miau/storage.rb', line 20

def instances
  @instances
end

#policies ⇒ Object (readonly)

Example @policies: {

posts: {
  delete: :delete,
  remove: :delete
},
application: {
  admin: :check
}

}



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# File 'lib/miau/storage.rb', line 19

def policies
  @policies
end

Instance Method Details

#add(klass, action, meth) ⇒ Object 



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# File 'lib/miau/storage.rb', line 31

def add(klass, action, meth)
  kls = klass.name.underscore[0..-8] # remove "_policy"
  kls = kls.to_sym
  @policies[kls] ||= {}
  @instances[kls] ||= klass.new
  @policies[kls][action.to_sym] = meth.to_sym
end

#find_policy(klass, action) ⇒ Object

returns policy: [instance, method]



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# File 'lib/miau/storage.rb', line 49

def find_policy(klass, action)
  kls = instance_of(klass)
  act = policy_method(klass, action)
  return [kls, act] if kls.respond_to?(act)

  klass = :application
  kls = instance_of(klass)
  act = policy_method(klass, action)
  [kls, act] if kls.respond_to?(act)
end

#reset ⇒ Object 



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# File 'lib/miau/storage.rb', line 26

def reset
  @policies = {}
  @instances = {}
end

#run(klass, action, user, resource) ⇒ Object 



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# File 'lib/miau/storage.rb', line 60

def run(klass, action, user, resource)
  arr = find_policy(klass, action)
  unless arr
    msg = "class <#{klass}> action <#{action}>"
    raise Miau::NotDefinedError, msg
  end

  policy, meth = arr
  policy.user = user
  policy.resource = resource
  policy.send(meth)
end

#to_yaml ⇒ Object 



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# File 'lib/miau/storage.rb', line 73

def to_yaml
  "# === @policies ===\n" + YAML.dump(@policies) +
    "# === @instances ===\n" + YAML.dump(@instances)
end