Module: Faraday::NestedParamsEncoder

Extended by:
Forwardable
Defined in:
lib/faraday/parameters.rb

Class Method Summary collapse

Class Method Details

.decode(query) ⇒ Object


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# File 'lib/faraday/parameters.rb', line 64

def self.decode(query)
  return nil if query == nil  # Recursive helper lambda

  dehash = lambda do |hash|
    hash.each do |(key, value)|
      if value.kind_of?(Hash)
        hash[key] = dehash.call(value)
      end
    end    # Numeric keys implies an array

    if hash != {} && hash.keys.all? { |key| key =~ /^\d+$/ }
      hash.sort.inject([]) do |accu, (_, value)|
        accu << value; accu
      end
    else
      hash
    end
  end

  empty_accumulator = {}
  return ((query.split('&').map do |pair|
    pair.split('=', 2) if pair && !pair.empty?
  end).compact.inject(empty_accumulator.dup) do |accu, (key, value)|
    key = unescape(key)
    if value.kind_of?(String)
      value = unescape(value.gsub(/\+/, ' '))
    end

    array_notation = !!(key =~ /\[\]$/)
    subkeys = key.split(/[\[\]]+/)
    current_hash = accu
    for i in 0...(subkeys.size - 1)
      subkey = subkeys[i]
      current_hash[subkey] = {} unless current_hash[subkey]
      current_hash = current_hash[subkey]
    end
    if array_notation
      current_hash[subkeys.last] = [] unless current_hash[subkeys.last]
      current_hash[subkeys.last] << value
    else
      current_hash[subkeys.last] = value
    end
    accu
  end).inject(empty_accumulator.dup) do |accu, (key, value)|
    accu[key] = value.kind_of?(Hash) ? dehash.call(value) : value
    accu
  end
end

.encode(params) ⇒ Object


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# File 'lib/faraday/parameters.rb', line 10

def self.encode(params)
  return nil if params == nil

  if !params.is_a?(Array)
    if !params.respond_to?(:to_hash)
      raise TypeError,
        "Can't convert #{params.class} into Hash."
    end
    params = params.to_hash
    params = params.map do |key, value|
      key = key.to_s if key.kind_of?(Symbol)
      [key, value]
    end    # Useful default for OAuth and caching.
    # Only to be used for non-Array inputs. Arrays should preserve order.

    params.sort!
  end

  # Helper lambda
  to_query = lambda do |parent, value|
    if value.is_a?(Hash)
      value = value.map do |key, val|
        key = escape(key)
        [key, val]
      end
      value.sort!
      buffer = ""
      value.each do |key, val|
        new_parent = "#{parent}%5B#{key}%5D"
        buffer << "#{to_query.call(new_parent, val)}&"
      end
      return buffer.chop
    elsif value.is_a?(Array)
      buffer = ""
      value.each_with_index do |val, i|
        new_parent = "#{parent}%5B%5D"
        buffer << "#{to_query.call(new_parent, val)}&"
      end
      return buffer.chop
    else
      encoded_value = escape(value)
      return "#{parent}=#{encoded_value}"
    end
  end

  # The params have form [['key1', 'value1'], ['key2', 'value2']].
  buffer = ''
  params.each do |parent, value|
    encoded_parent = escape(parent)
    buffer << "#{to_query.call(encoded_parent, value)}&"
  end
  return buffer.chop
end