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added workaround for strange timezone behaviour

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This commit is contained in:
Reinier Balt 2008-11-27 15:48:20 +01:00
parent 764e41685b
commit f43447e33f
1 changed files with 16 additions and 6 deletions
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22
app/models/recurring_todo.rb
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@ -29,7 +29,7 @@ class RecurringTodo < ActiveRecord::Base
end
# the following recurrence patterns can be stored:
#
#
# daily todos - recurrence_period = 'daily'
# every nth day - nth stored in every_other1
# every work day - only_work_days = true
@ -392,7 +392,7 @@ class RecurringTodo < ActiveRecord::Base
# previous is the due date of the previous todo or it is the completed_at
# date when the completed_at date is after due_date (i.e. you did not make
# the due date in time)
#
#
# assumes self.recurring_period == 'daily'
# determine start
@ -481,7 +481,14 @@ class RecurringTodo < ActiveRecord::Base
if the_next.nil? || the_next <= start
# the nth day is already passed in this month, go to next month and try
# again
the_next = the_next+n.months
# fiddle with timezone. Looks like we hit a bug in rails here where
# 2008-12-01 +0100 plus 1.month becomes 2008-12-31 +0100. For now, just
# calculate in UTC and convert back to local timezone.
# TODO: recheck if future rails versions have this problem too
the_next = Time.utc(the_next.year, the_next.month, the_next.day)+n.months
the_next = Time.zone.local(the_next.year, the_next.month, the_next.day)
# TODO: if there is still no match, start will be set to nil. if we ever
# support 5th day of the month, we need to handle this case
the_next = get_xth_day_of_month(self.every_other3, self.every_count, the_next.month, the_next.year)
@ -504,8 +511,10 @@ class RecurringTodo < ActiveRecord::Base
# convert back to local timezone
return Time.zone.local(last_day.year, last_day.month, last_day.day)
else
# 1-4th -> count upwards
start = Time.zone.local(year,month,1)
# 1-4th -> count upwards last -> count backwards. use UTC to avoid strange
# timezone oddities where last_day -= 1.day seems to shift tz+0100 to
# tz+0000
start = Time.utc(year,month,1)
n = x
while n > 0
while start.wday() != weekday
@ -514,7 +523,8 @@ class RecurringTodo < ActiveRecord::Base
n -= 1
start += 1.day unless n==0
end
return start
# convert back to local timezone
return Time.zone.local(start.year, start.month, start.day)
end
end