Module: Ruson::Persistence

Included in:
Base
Defined in:
lib/ruson/persistence.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/ruson/persistence.rb', line 3

def self.included(klass)
  klass.extend(ClassMethods)
  klass.extend(Ruson::Json)
end

Instance Method Details

#delete_file_from_disk ⇒ Object 



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# File 'lib/ruson/persistence.rb', line 20

def delete_file_from_disk
  FileUtils.rm_f(model_path)
end

#destroy ⇒ Object 



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# File 'lib/ruson/persistence.rb', line 24

def destroy
  delete_file_from_disk
  true
end

#ensure_model_folder_exists ⇒ Object 



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# File 'lib/ruson/persistence.rb', line 29

def ensure_model_folder_exists
  return if File.exist?(self.class.model_base_path)

  FileUtils.mkdir_p(self.class.model_base_path)
end

#generate_uniq_id ⇒ Object 



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# File 'lib/ruson/persistence.rb', line 35

def generate_uniq_id
  ensure_model_folder_exists

  return if id

  id = 0

  Dir.glob(File.join(self.class.model_base_path, '*.json')).each do |path|
    file_id = id_from_file_path(path)

    id = file_id if file_id > id
  end

  self.id = id + 1
end

#model_path ⇒ Object 



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# File 'lib/ruson/persistence.rb', line 51

def model_path
  File.join(self.class.model_base_path, "#{id}.json")
end

#save ⇒ Object 



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# File 'lib/ruson/persistence.rb', line 61

def save
  self.class.ensure_output_folder_is_defined
  generate_uniq_id
  write_file_to_disk
  true
end

#update(attributes) ⇒ Object 



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# File 'lib/ruson/persistence.rb', line 68

def update(attributes)
  attributes.symbolize_keys!

  # Takes only accessor for attributes to be updated, avoiding to nullify
  # the other attributes.
  filtered_accessors = self.class.accessors.select do |key, accessor_attrs|
    attributes.key?(key) || attributes.key?(accessor_attrs[:name])
  end

  update_attributes(filtered_accessors, attributes)

  save
end

#write_file_to_disk ⇒ Object 



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# File 'lib/ruson/persistence.rb', line 55

def write_file_to_disk
  File.open(model_path, 'w') do |file|
    file.write(to_json(exclude: %i[id]))
  end
end