Class: Jets::Camelizer

Inherits:
Object
  • Object
show all
Defined in:
lib/jets/camelizer.rb

Class Method Summary collapse

Class Method Details

.camelize(value) ⇒ Object 



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# File 'lib/jets/camelizer.rb', line 44

def camelize(value)
  return value if value.is_a?(Integer)

  value = value.to_s.camelize
  special_map[value] || value
end

.camelize_key(k, parent_keys = []) ⇒ Object 



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# File 'lib/jets/camelizer.rb', line 21

def camelize_key(k, parent_keys=[])
  k = k.to_s

  if passthrough?(k, parent_keys)
    k # pass through untouch
  elsif parent_keys.last == "EventPattern" # top-level
    k.dasherize
  elsif parent_keys.include?("EventPattern")
    # Any keys at 2nd level under EventPattern will be pascalized
    pascalize(k)
  else
    camelize(k)
  end
end

.pascalize(value) ⇒ Object 



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# File 'lib/jets/camelizer.rb', line 51

def pascalize(value)
  new_value = value.camelize
  first_char = new_value[0..0].downcase
  new_value[0] = first_char
  new_value
end

.passthrough?(k, parent_keys) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jets/camelizer.rb', line 36

def passthrough?(k, parent_keys)
  # do not transform keys anything under these special keys
  parent_keys.include?("Variables") ||
  parent_keys.include?("ResponseParameters") ||
  parent_keys.include?("Fn::Sub") ||
  k.include?('-') || k.include?('/')
end

.special_map ⇒ Object

Some keys have special mappings



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# File 'lib/jets/camelizer.rb', line 59

def special_map
  {
    "TemplateUrl" => "TemplateURL",
    "Ttl" => "TTL",
    "MaxReceiveCount" => "maxReceiveCount",
    "DeadLetterTargetArn" => "deadLetterTargetArn",
    "DbSubnetGroupDescription" => "DBSubnetGroupDescription",
    "DbSubnetGroupName" => "DBSubnetGroupName",
  }
end

.transform(value, parent_keys = []) ⇒ Object 



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# File 'lib/jets/camelizer.rb', line 6

def transform(value, parent_keys=[])
  case value
  when Array
    value.map { |v| transform(v, parent_keys) }
  when Hash
    initializer = value.map do |k, v|
      new_key = camelize_key(k, parent_keys)
      [new_key, transform(v, parent_keys+[new_key])]
    end
    Hash[initializer]
  else
    value # do not transform values
  end
end