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module JSONAPI
class IncludeDirective
# Utilities to create an IncludeDirective hash from various types of
# inputs.
module Parser
module_function
# @api private
def parse_include_args(include_args)
case include_args
when Symbol
{ include_args => {} }
when Hash
parse_hash(include_args)
when Array
parse_array(include_args)
when String
parse_string(include_args)
else
{}
end
end
# @api private
def parse_string(include_string)
include_string.split(',')
.each_with_object({}) do |path, hash|
deep_merge!(hash, parse_path_string(path))
end
end
# @api private
def parse_path_string(include_path)
include_path.split('.')
.reverse
.reduce({}) { |a, e| { e.to_sym => a } }
end
# @api private
def parse_hash(include_hash)
include_hash.each_with_object({}) do |(key, value), hash|
hash[key.to_sym] = parse_include_args(value)
end
end
# @api private
def parse_array(include_array)
include_array.each_with_object({}) do |x, hash|
deep_merge!(hash, parse_include_args(x))
end
end
# @api private
def deep_merge!(src, ext)
ext.each do |k, v|
if src[k].is_a?(Hash) && v.is_a?(Hash)
deep_merge!(src[k], v)
else
src[k] = v
end
end
end
end
end
end
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