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Contents
module ChartMogul
module Utils
class HashSnakeCaser
#
# Recursively converts CamelCase and camelBack JSON-style hash keys to
# Rubyish snake_case, suitable for use during instantiation of Ruby
# model attributes.
#
def initialize(hash)
@hash = hash
end
def to_snake_keys(value = @hash)
case value
when Array
value.map { |v| to_snake_keys(v) }
when Hash
snake_hash(value)
else
value
end
end
private
def snake_hash(value)
Hash[value.map { |k, v| [underscore_key(k), to_snake_keys(v)] }]
end
def underscore_key(k)
if k.instance_of?(Symbol)
underscore(k.to_s).to_sym
elsif k.instance_of?(String)
underscore(k)
else
k # Can't snakify anything except strings and symbols
end
end
def underscore(string)
string.gsub(/::/, '/')
.gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
.gsub(/([a-z\d])([A-Z])/, '\1_\2')
.tr('-', '_')
.downcase
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems