Class: ViewModels::PathStore

Inherits:
Object
  • Object
show all
Defined in:
lib/view_models/path_store.rb

Overview

A simple path store. Designed to remove a bit of complexity from the base view model.

Use it to install an instance in the metaclass.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(view_model_class) ⇒ PathStore

Initialize the path store

Parameters:

  • view_model_class (ViewModel) —

    The view model class



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# File 'lib/view_models/path_store.rb', line 18

def initialize view_model_class
  @view_model_class = view_model_class
  @name_path_mapping = {}
end

Instance Attribute Details

#view_model_class ⇒ Object (readonly)

The view model class attribute



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# File 'lib/view_models/path_store.rb', line 13

def view_model_class
  @view_model_class
end

Class Method Details

.install_in(klass) ⇒ Object

Install in the metaclass (as an example).



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# File 'lib/view_models/path_store.rb', line 25

def self.install_in klass
  klass.path_store = PathStore.new klass
end

Instance Method Details

#[](key) ⇒ Object

Simple [] delegation.



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# File 'lib/view_models/path_store.rb', line 60

def [] key
  @name_path_mapping[key]
end

#[]=(key, path) ⇒ Object

Does not save values for nil keys.



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# File 'lib/view_models/path_store.rb', line 53

def []= key, path
  return if key.nil?
  @name_path_mapping[key] ||= path
end

#cached(options, &block) ⇒ Object

Cache the result of the rendering.



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# File 'lib/view_models/path_store.rb', line 31

def cached options, &block
  prepare options.path_key
  result = block.call
  save options and result if result
end

#prepare(key) ⇒ Object

Note:

If this is nil, the store will not save the path.

Prepare the key for the next storing procedure.



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# File 'lib/view_models/path_store.rb', line 41

def prepare key
  @key = key
end

#save(options) ⇒ Object

Saves the options for the prepared key.



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# File 'lib/view_models/path_store.rb', line 47

def save options
  self[@key] = options.file
end