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#!/usr/bin/ruby1.8
module Custodian
module Util
#
# A class for working with time-spans.
#
class TimeSpan
#
# Given a starting hour such as 10pm and and ending hour such as 4am
# see if the current hour is inside that range.
#
def TimeSpan.inside?( p_start, p_end, cur_hour = nil)
#
# If we don't have an hour specified then use the current one.
#
if ( cur_hour.nil? )
cur_hour = Time.now.hour
end
#
# Convert "XXPM" to appropriate 24-hour based integers
#
if ( ( p_start.kind_of? String ) && ( p_start =~ /([0-9]+)pm$/i ) )
p_start = $1.dup.to_i + 12;
end
if ( ( p_end.kind_of? String ) && ( p_end =~ /([0-9]+)pm$/i ) )
p_end = $1.dup.to_i + 12;
end
if ( ( cur_hour.kind_of? String ) && ( cur_hour =~ /([0-9]+)pm$/i ) )
cur_hour = $1.dup.to_i + 12;
end
#
# If we have AM suffixes then strip them
#
if ( p_start.kind_of? String )
p_start = p_start.sub( /am$/, '' )
p_start = p_start.to_i
end
if ( p_end.kind_of? String )
p_end = p_end.sub( /am$/, '' )
p_end = p_end.to_i
end
if ( cur_hour.kind_of? String )
cur_hour = cur_hour.sub( /am$/, '' )
cur_hour = cur_hour.to_i
end
#
# Ensure we're now left with integer values.
#
raise ArgumentError, "Integer required for start time" unless( p_start.kind_of? Integer )
raise ArgumentError, "Integer required for end time" unless( p_end.kind_of? Integer )
raise ArgumentError, "Integer required for current hour" unless( cur_hour.kind_of? Integer )
#
# Ensure the values have appropriate bounds.
#
raise ArgumentError, "Invalid start time" unless( ( p_start >= 0 ) && ( p_start <= 23 ) )
raise ArgumentError, "Invalid end time" unless( ( p_end >= 0 ) && ( p_end <= 23 ) )
raise ArgumentError, "Invalid current time" unless( ( cur_hour >= 0 ) && ( cur_hour <= 23 ) )
#
# Valid hours, within the span
#
valid = {}
#
# Iterate over the hours. Store in a hash.
#
hour = p_start
while( hour != p_end )
valid[hour] = 1
hour += 1
hour = 0 if ( hour > 23 )
end
valid[p_end]=1
# now do the test.
( valid[cur_hour] == 1 )
end
end
end
end
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