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|
class UserAgent
class Version
include ::Comparable
def self.new(obj = nil)
case obj
when Version
obj
when String
super
when NilClass
super("")
else
raise ArgumentError, "invalid value for Version: #{obj.inspect}"
end
end
def initialize(str)
@str = str
if @str =~ /^\s*$/
@nil = true
@sequences = []
@comparable = false
elsif str =~ /^\d+$/ || str =~ /^\d+\./
@nil = false
@sequences = str.scan(/\d+|[A-Za-z][0-9A-Za-z-]*$/).map { |s| s =~ /^\d+$/ ? s.to_i : s }
@comparable = true
else
@nil = false
@sequences = [str]
@comparable = false
end
end
def nil?
@nil
end
def to_a
@sequences.dup
end
def to_str
@str.dup
end
def eql?(other)
other.is_a?(self.class) && to_s == other.to_s
end
def ==(other)
case other
when Version
eql?(other)
when String
eql?(self.class.new(other))
when NilClass
nil?
else
false
end
end
def <=>(other)
case other
when Version
if @comparable
([0]*6).zip(to_a, other.to_a).each do |dump, a, b|
a ||= 0
b ||= 0
if a.is_a?(String) && b.is_a?(Integer)
return -1
elsif a.is_a?(Integer) && b.is_a?(String)
return 1
elsif a == b
next
else
return a <=> b
end
end
0
elsif to_s == other.to_s
return 0
else
return -1
end
when String, NilClass
self <=> self.class.new(other)
else
nil
end
end
def to_s
to_str
end
def inspect
"#<#{self.class} #{to_s}>"
end
end
end
|
