Module: Padrino::Utils

Defined in:
padrino-support/lib/padrino-support/utils.rb

Class Method Summary collapse

Class Method Details

.build_uri_query(object, namespace = nil) ⇒ Object

Builds an URI query from a Hash or any Object.

Examples (~ marks here that output is actually escaped by CGI):

Utils.build_uri_query(a: 1, b: 2)           # => 'a=1&b=2'
Utils.build_uri_query(a: [1, 2])            # => ~'a[]=1&a[]=2'
Utils.build_uri_query([1, 2], 'namespace')  # => ~'namespace[]=1&namespace[]=2'
Utils.build_uri_query(a: { d: 2 }, b: 3)    # => ~'a[d]=2&b=3'



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# File 'padrino-support/lib/padrino-support/utils.rb', line 17

def build_uri_query(object, namespace = nil)
  case object
  when Hash
    object.map do |key, value|
      next if [{}, []].include?(value)
      build_uri_query(value, namespace ? "#{namespace}[#{key}]" : key)
    end.compact.join('&')
  when Array
    raise ArgumentError, 'namespace is missing' unless namespace
    (object.empty? ? [''] : object).map do |value|
      build_uri_query(value, "#{namespace}[]")
    end.join('&')
  else
    raise ArgumentError, 'namespace is missing' unless namespace
    "#{CGI.escape(namespace.to_s)}=#{CGI.escape(object.to_s)}"
  end
end

.deep_dup(object) ⇒ Object

Recursively duplicates the passed object.



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# File 'padrino-support/lib/padrino-support/utils.rb', line 38

def deep_dup(object)
  case object
  when Array
    object.map { |value| deep_dup(value) }
  when Hash
    object.each_with_object(object.dup.clear) do |(key, value), new_hash|
      new_hash[deep_dup(key)] = deep_dup(value)
    end
  when NilClass, FalseClass, TrueClass, Symbol, Numeric, Method
    object
  else
    begin
      object.dup
    rescue TypeError
      object
    end
  end
end

.symbolize_keys(hash) ⇒ Object

Returns a Hash with keys turned into symbols.



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# File 'padrino-support/lib/padrino-support/utils.rb', line 60

def symbolize_keys(hash)
  result = hash.class.new
  hash.each_key do |key|
    result[(key.to_sym rescue key)] = hash[key]
  end
  result
end