Class: Jason::IncludesHelper

Inherits:
Object
  • Object
show all
Defined in:
lib/jason/includes_helper.rb

Overview

Helper to provide other modules with information about the includes of a subscription

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(main_tree) ⇒ IncludesHelper

Returns a new instance of IncludesHelper.



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# File 'lib/jason/includes_helper.rb', line 6

def initialize(main_tree)
  raise "Root must be hash" if !main_tree.is_a?(Hash)
  raise "Only one root key allowed" if main_tree.keys.size != 1
  @main_tree = main_tree
end

Instance Attribute Details

#main_tree ⇒ Object

Returns the value of attribute main_tree.



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# File 'lib/jason/includes_helper.rb', line 4

def main_tree
  @main_tree
end

Instance Method Details

#all_models(model_name = nil) ⇒ Object 



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# File 'lib/jason/includes_helper.rb', line 26

def all_models(model_name = nil)
  model_name = model_name.presence || root_model
  assoc_name = get_assoc_name(model_name)
  tree = get_tree_for(assoc_name)
  [model_name, all_models_recursive(tree)].flatten.uniq.map(&:to_s).map(&:singularize)
end

#all_models_recursive(tree) ⇒ Object 



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# File 'lib/jason/includes_helper.rb', line 12

def all_models_recursive(tree)
  sub_models = if tree.is_a?(Hash)
    tree.map do |k,v|
      [k, all_models_recursive(v)]
    end
  elsif tree.is_a?(Array)
    tree.map do |v|
      all_models_recursive(v)
    end
  else
    tree
  end
end

#get_assoc_name(model_name, haystack = main_tree) ⇒ Object

assoc could be plural or not, so need to scan both.



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# File 'lib/jason/includes_helper.rb', line 38

def get_assoc_name(model_name, haystack = main_tree)
  if haystack.is_a?(Hash)
    haystack.each do |assoc_name, includes_tree|
      if model_name.pluralize == assoc_name.to_s.pluralize
        return assoc_name
      else
        found_assoc = get_assoc_name(model_name, includes_tree)
        return found_assoc if found_assoc
      end
    end
  elsif haystack.is_a?(Array)
    haystack.each do |element|
      if element.is_a?(String)
        if model_name.pluralize == element.pluralize
          return element
        end
      else
        found_assoc = get_assoc_name(model_name, element)
        return found_assoc if found_assoc
      end
    end
  else
    if model_name.pluralize == haystack.to_s.pluralize
      return haystack
    end
  end

  return nil
end

#get_tree_for(needle, assoc_name = nil, haystack = main_tree) ⇒ Object 



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# File 'lib/jason/includes_helper.rb', line 68

def get_tree_for(needle, assoc_name = nil, haystack = main_tree)
  return haystack if needle.to_s.pluralize == assoc_name.to_s.pluralize

  if haystack.is_a?(Hash)
    haystack.each do |assoc_name, includes_tree|
      found_haystack = get_tree_for(needle, assoc_name, includes_tree)
      return found_haystack if found_haystack.present?
    end
  elsif haystack.is_a?(Array)
    haystack.each do |includes_tree|
      found_haystack = get_tree_for(needle, nil, includes_tree)
      return found_haystack if found_haystack.present?
    end
  elsif haystack.is_a?(String)
    found_haystack = get_tree_for(needle, haystack, nil)
    return found_haystack if found_haystack.present?
  end

  return []
end

#in_sub(parent_model, child_model) ⇒ Object 



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# File 'lib/jason/includes_helper.rb', line 89

def in_sub(parent_model, child_model)
  tree = get_tree_for(parent_model)

  if tree.is_a?(Hash)
    return tree.keys.map(&:singularize).include?(child_model)
  elsif tree.is_a?(Array)
    tree.each do |element|
      if element.is_a?(String)
        return true if element.singularize == child_model
      elsif element.is_a?(Hash)
        return true if element.keys.map(&:singularize).include?(child_model)
      end
    end
  elsif tree.is_a?(String)
    return tree.singularize == child_model
  end

  return false
end

#root_model ⇒ Object 



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# File 'lib/jason/includes_helper.rb', line 33

def root_model
  main_tree.keys[0]
end