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Contents
# Custom Camelizer with CloudFormation specific handling.
# Based on: https://stackoverflow.com/questions/8706930/converting-nested-hash-keys-from-camelcase-to-snake-case-in-ruby
module Jets
class Camelizer
class << self
def transform(value, parent_keys=[])
case value
when Array
value.map { |v| transform(v) }
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
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
def passthrough?(k, parent_keys)
parent_keys.include?("Variables") || # do not transform keys anything under Variables
parent_keys.include?("ResponseParameters") || # do not transform keys anything under Variables
k.include?('-') || k.include?('/')
end
def camelize(value)
return value if value.is_a?(Integer)
value = value.to_s.camelize
special_map[value] || value
end
def pascalize(value)
new_value = value.camelize
first_char = new_value[0..0].downcase
new_value[0] = first_char
new_value
end
# Some keys have special mappings
def special_map
{
"TemplateUrl" => "TemplateURL"
}
end
end
end
end
Version data entries
44 entries across 44 versions & 1 rubygems