Class: Ibrain::Preferences::Configuration

Inherits:
Object
  • Object
show all
Includes:
Preferable
Defined in:
lib/ibrain/preferences/configuration.rb

Overview

This takes the preferrable methods and adds some syntatic sugar to access the preferences

class App < Configuration
  preference :color, :string
end

a = App.new

Provides the following setters:

a.color = :blue
a[:color] = :blue
a.set color: :blue
a.preferred_color = :blue

and the following getters:

a.color
a[:color]
a.get :color
a.preferred_color

Direct Known Subclasses

AppConfiguration

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Preferable

#default_preferences, #defined_preferences, #get_preference, #has_preference!, #has_preference?, #preference_default, #preference_type, #set_preference

Constructor Details

#initialize ⇒ Configuration

Returns a new instance of Configuration.



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# File 'lib/ibrain/preferences/configuration.rb', line 43

def initialize
  @loaded_defaults = Ibrain.ibrain_version
  @load_defaults_called = false
end

Instance Attribute Details

#load_defaults_called ⇒ Object (readonly)

Returns the value of attribute load_defaults_called.



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# File 'lib/ibrain/preferences/configuration.rb', line 41

def load_defaults_called
  @load_defaults_called
end

#loaded_defaults ⇒ Object (readonly)

Returns the value of attribute loaded_defaults.



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# File 'lib/ibrain/preferences/configuration.rb', line 39

def loaded_defaults
  @loaded_defaults
end

#preference_store ⇒ Object Also known as: preferences

Storage method for preferences.



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# File 'lib/ibrain/preferences/configuration.rb', line 78

attr_writer :preference_store

Class Method Details

.by_version(*args) ⇒ Object

Generates a different preference default depending on #version_defaults

This method is meant to be used in the ‘default:` keyword argument for preference. For instance, in the example, `foo`’s default was ‘true` until version 3.0.0.alpha, when it became `false`:

Examples:

preference :foo, :boolean, default: by_version(true, "3.0.0.alpha" => false)

See Also:



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# File 'lib/ibrain/preferences/configuration.rb', line 133

def self.by_version(*args)
  proc do |loaded_defaults|
    Ibrain::Core::VersionedValue.new(*args).call(loaded_defaults)
  end
end

.class_name_attribute(name, default:) ⇒ Object 



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# File 'lib/ibrain/preferences/configuration.rb', line 145

def self.class_name_attribute(name, default:)
  ivar = :"@#{name}"

  define_method("#{name}=") do |class_name|
    # If this is a named class constant, we should store it as a string to
    # allow code reloading.
    class_name = class_name.name if class_name.is_a?(Class) && class_name.name

    instance_variable_set(ivar, class_name)
  end

  define_method(name) do
    class_name = instance_variable_get(ivar)
    class_name ||= default
    class_name = class_name.constantize if class_name.is_a?(String)
    class_name
  end
end

.preference(name, type, options = {}) ⇒ Object 



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# File 'lib/ibrain/preferences/configuration.rb', line 139

def self.preference(name, type, options = {})
  super
  alias_method name.to_s, "preferred_#{name}"
  alias_method "#{name}=", "preferred_#{name}="
end

Instance Method Details

#check_load_defaults_called(instance_constant_name = nil) ⇒ Object 



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# File 'lib/ibrain/preferences/configuration.rb', line 57

def check_load_defaults_called(instance_constant_name = nil)
  return if load_defaults_called || !Ibrain::Core.has_install_generator_been_run?

  target_name = instance_constant_name || "#{self.class.name}.new"
  Ibrain::Deprecation.warn <<~MSG
    It's recommended that you explicitly load the default configuration for
    your current Ibrain version. You can do it by adding the following call
    to your Ibrain initializer within the #{target_name} block:

      config.load_defaults('#{Ibrain.ibrain_version}')

  MSG
end

#configure {|config| ... } ⇒ Object

Yields:

  • (config) —

    Yields this configuration object to a block



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# File 'lib/ibrain/preferences/configuration.rb', line 72

def configure
  yield(self)
end

#load_defaults(version) ⇒ Object

overriden.

Parameters:

  • Ibrain (String) —

    version from which take defaults when not

See Also:



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# File 'lib/ibrain/preferences/configuration.rb', line 51

def load_defaults(version)
  @loaded_defaults = version
  @load_defaults_called = true
  reset
end

#reset ⇒ Object

Reset all preferences to their default values.



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# File 'lib/ibrain/preferences/configuration.rb', line 106

def reset
  set(default_preferences)
end

#set(preferences) ⇒ Object

Parameters:

  • preferences (Hash) —

    a hash of preferences to set



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# File 'lib/ibrain/preferences/configuration.rb', line 116

def set(preferences)
  preferences.each do |name, value|
    set_preference name, value
  end
end

#use_legacy_db_preferences! ⇒ Object

Replace the new static preference store with the legacy store which fetches preferences from the DB.



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# File 'lib/ibrain/preferences/configuration.rb', line 99

def use_legacy_db_preferences!
  @preference_store = ScopedStore.new(self.class.name.underscore)
end

#use_static_preferences! ⇒ Object

Replace the default legacy preference store, which stores preferences in the Ibrain_preferences table, with a plain in memory hash. This is faster and less error prone.

This will set all preferences to their default values.

These won’t be loaded from or persisted to the database, so any desired changes must be made each time the application is started, such as in an initializer.



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# File 'lib/ibrain/preferences/configuration.rb', line 93

def use_static_preferences!
  @preference_store = default_preferences
end