Class: ParamsCleaner::Whitelist

Inherits:
Object
  • Object
show all
Defined in:
lib/params_cleaner/whitelist.rb

Instance Method Summary collapse

Constructor Details

#initialize(whitelist) ⇒ Whitelist

Returns a new instance of Whitelist.



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# File 'lib/params_cleaner/whitelist.rb', line 3

def initialize(whitelist)
  @whitelist = whitelist
end

Instance Method Details

#_sanitize_hash(hash, parent) ⇒ Object 



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# File 'lib/params_cleaner/whitelist.rb', line 17

def _sanitize_hash(hash, parent)
  valid_keys = _valid_keys_for_parent(parent)
  valid_pairs = hash.select { |key, value| valid_keys.include?(key.to_sym) }
  sanitized_pairs = valid_pairs.map { |key, value| [key, sanitize(value, key.to_sym)] }

  HashWithIndifferentAccess.new(Hash[sanitized_pairs])
end

#_top_level_keys ⇒ Object 



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# File 'lib/params_cleaner/whitelist.rb', line 25

def _top_level_keys
  @top_level_keys ||= @whitelist.reject { |item| item.kind_of?(Hash) }
end

#_valid_keys_for_parent(parent) ⇒ Object 



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# File 'lib/params_cleaner/whitelist.rb', line 29

def _valid_keys_for_parent(parent)
  _whitelist_hash.keys.tap do |keys|
    keys.concat(_top_level_keys) if parent.nil?
    keys.concat(_whitelist_hash[parent]) if _whitelist_hash.has_key?(parent)
  end
end

#_whitelist_hash ⇒ Object 



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# File 'lib/params_cleaner/whitelist.rb', line 36

def _whitelist_hash
  @whitelist_hash ||= @whitelist.last.is_a?(Hash) ? @whitelist.last : {}
end

#sanitize(item, parent = nil) ⇒ Object 



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# File 'lib/params_cleaner/whitelist.rb', line 7

def sanitize(item, parent = nil)
  if item.kind_of?(Hash)
    _sanitize_hash(item, parent)
  elsif item.kind_of?(Array)
    item.map { |item| sanitize(item, parent) }
  else
    item
  end
end