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Versions: 21
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Contents
require 'cgi'
module Padrino
module Utils
extend self
##
# Builds an URI query from a Hash or any Object.
#
# Examples (~ marks here that output is actually escaped by CGI):
#
# Utils.build_uri_query(:a => 1, :b => 2) #=> "a=1&b=2"
# Utils.build_uri_query(:a => [1, 2]) #=> ~"a[]=1&a[]=2"
# Utils.build_uri_query([1, 2], 'namespace') #=> ~"namespace[]=1&namespace[]=2"
# Utils.build_uri_query(:a => { :d => 2 }, :b => 3) #=> ~"a[d]=2&b=3"
#
def build_uri_query(object, namespace = nil)
case object
when Hash
object.map do |key, value|
next if value == {} || value == []
build_uri_query(value, namespace ? "#{namespace}[#{key}]" : key)
end.compact.join('&')
when Array
fail ArgumentError, 'namespace is missing' unless namespace
(object.empty? ? [''] : object).map do |value|
build_uri_query(value, "#{namespace}[]")
end.join('&')
else
fail ArgumentError, 'namespace is missing' unless namespace
"#{CGI.escape(namespace.to_s)}=#{CGI.escape(object.to_s)}"
end
end
##
# Recursively duplicates the passed object.
#
def deep_dup(object)
case object
when Array
object.map{ |value| deep_dup(value) }
when Hash
object.each_with_object(object.dup.clear) do |(key, value), new_hash|
new_hash[deep_dup(key)] = deep_dup(value)
end
when NilClass, FalseClass, TrueClass, Symbol, Numeric, Method
object
else
begin
object.dup
rescue TypeError
object
end
end
end
##
# Returns a Hash with keys turned into symbols.
#
def symbolize_keys(hash)
result = hash.class.new
hash.each_key do |key|
result[(key.to_sym rescue key)] = hash[key]
end
result
end
end
end
Version data entries
21 entries across 21 versions & 2 rubygems