lib/maid/numeric_extensions.rb
module Maid::NumericExtensions
# From https://github.com/rails/rails/blob/master/activesupport/lib/active_support/core_ext/numeric/time.rb, with some
# modifications since `active_support` ruins `Logger` by overriding its functionality.
module Time
# Enables the use of time calculations and declarations, like 45.minutes + 2.hours + 4.years.
#
# These methods use Time#advance for precise date calculations when using from_now, ago, etc.
# as well as adding or subtracting their results from a Time object. For example:
#
# # equivalent to Time.now.advance(:months => 1)
# 1.month.from_now
#
# # equivalent to Time.now.advance(:years => 2)
# 2.years.from_now
#
# # equivalent to Time.now.advance(:months => 4, :years => 5)
# (4.months + 5.years).from_now
#
# While these methods provide precise calculation when used as in the examples above, care
# should be taken to note that this is not true if the result of `months', `years', etc is
# converted before use:
#
# # equivalent to 30.days.to_i.from_now
# 1.month.to_i.from_now
#
# # equivalent to 365.25.days.to_f.from_now
# 1.year.to_f.from_now
#
# In such cases, Ruby's core
# Date[http://stdlib.rubyonrails.org/libdoc/date/rdoc/index.html] and
# Time[http://stdlib.rubyonrails.org/libdoc/time/rdoc/index.html] should be used for precision
# date and time arithmetic
def seconds
self
end
alias second seconds
def minutes
self * 60
end
alias minute minutes
def hours
self * 3600
end
alias hour hours
def days
self * 24.hours
end
alias day days
def weeks
self * 7.days
end
alias week weeks
def fortnights
self * 2.weeks
end
alias fortnight fortnights
# Reads best without arguments: 10.minutes.ago
def ago(time = ::Time.now)
time - self
end
# Reads best with argument: 10.minutes.until(time)
alias until ago
# Reads best with argument: 10.minutes.since(time)
def since(time = ::Time.now)
time + self
end
# Reads best without arguments: 10.minutes.from_now
alias from_now since
######################
### Maid additions ###
######################
# TODO: find a better place for these to live?
# Reads well in a case like:
#
# 1.week.since? accessed_at('filename')
def since?(other_time)
other_time < ago
end
end
module SizeToKb
# Enables Computer disk size conversion into kilobytes.
#
# Can convert megabytes, gigabytes and terabytes.
# Handles full name (megabyte), plural (megabytes) and symobl (mb/mB).
#
# 1.megabyte = 1024 kilobytes
def kb
self
end
alias kilobytes kb
alias kilobyte kb
alias kB kb
def mb
self * (1024**1)
end
alias megabytes mb
alias megabyte mb
alias mB mb
def gb
self * (1024**2)
end
alias gigabytes gb
alias gigabyte gb
alias gB gb
def tb
self * (1024**3)
end
alias terabytes tb
alias terabyte tb
alias tB tb
end
end