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Created December 1, 2010 22:36
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Handling French date format in Ruby
## Try 1
# How could I get the following working nicely
Date.strptime("Ven 13 Mai. 2011, 16h00", "%a %d %b %Y, %Hh%M")
# I've tried to update Date::ABBR_DAYNAMES as follow
I18n.locale = :fr
Date::ABBR_DAYNAMES = I18n.t('date.abbr_day_names')
Date::ABBR_MONTHNAMES = I18n.t('date.abbr_month_names')
# So far no luck, it look like Date::ABBR_DAYNAMES, ... are only used for output, not parsing.
# Any trick ?
## Try 2
# Patching Date::Format look like an option. Replacing Date::Format::MONTHS values,
# and so on make it working as expected. However that would work only for French
# so remain unthinkable.
# I've made up a patch that update this constants depending on I18n.locale, ...
# So far all looks good. The constant get updated properly but there's a remaining
# issue that doesn't make any sense to me.
# Here's a quick debug code to showcase the issue, debugging made inside lib/date/format.rb in self._strptime_i
# Pacthed code for debug
puts "str = \"#{str}\"\nstr.sub!(/\\A(#{Format::ABBR_MONTHS.keys.join('|')})/io, '')"
puts str.sub!(/\A(#{Format::ABBR_MONTHS.keys.join('|')})/io, '')
# With default Date::Format
MONTHS = {
'january' => 1, 'february' => 2, 'march' => 3, 'april' => 4,
'may' => 5, 'june' => 6, 'july' => 7, 'august' => 8,
'september'=> 9, 'october' =>10, 'november' =>11, 'december' =>12
}
DAYS = {
'sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday'=> 3,
'thursday' => 4, 'friday' => 5, 'saturday' => 6
}
ABBR_MONTHS = {
'jan' => 1, 'feb' => 2, 'mar' => 3, 'apr' => 4,
'may' => 5, 'jun' => 6, 'jul' => 7, 'aug' => 8,
'sep' => 9, 'oct' =>10, 'nov' =>11, 'dec' =>12
}
ABBR_DAYS = {
'sun' => 0, 'mon' => 1, 'tue' => 2, 'wed' => 3,
'thu' => 4, 'fri' => 5, 'sat' => 6
}
str = "Apr 2011, 10:00 am"
str.sub!(/\A(oct|jul|jan|dec|jun|apr|feb|may|sep|aug|mar|nov)/io, '')
# => 2011, 10:00 am
str = "Feb 2011"
str.sub!(/\A(oct|jul|jan|dec|jun|apr|feb|may|sep|aug|mar|nov)/io, '')
# => 2011
str = "Avr. 2011"
str.sub!(/\A(déc.|juil.|sept.|jan.|juin|nov.|oct.|août|fév.|mar.|avr.|mai)/io, '')
# => nil
str = "Avril 2011"
str.sub!(/\A(déc.|juil.|sept.|jan.|juin|nov.|oct.|août|fév.|mar.|avr.|mai)/io, '')
# => nil
# With French Date::Format values HARDCODED (Works)
MONTHS = {"avril"=>4, "septembre"=>9, "juin"=>6, "mars"=>3, "février"=>2, "janvier"=>1, "novembre"=>11, "août"=>8, "octobre"=>10, "juillet"=>7, "décembre"=>12, "mai"=>5}
DAYS = {"jeudi"=>3, "samedi"=>5, "dimanche"=>6, "mercredi"=>2, "mardi"=>1, "vendredi"=>4}
ABBR_MONTHS = {"déc."=>12, "sept."=>9, "juil."=>7, "nov."=>11, "juin"=>6, "jan."=>1, "oct."=>10, "août"=>8, "fév."=>2, "mar."=>3, "mai"=>5, "avr."=>4}
ABBR_DAYS = {"jeu"=>3, "mer"=>2, "dim"=>6, "mar"=>1, "sam"=>5, "ven"=>4}
str = "Feb 2011"
str.sub!(/\A(déc.|juil.|sept.|jan.|juin|nov.|oct.|août|fév.|mar.|avr.|mai)/io, '')
# => nil
str = "Avr. 2011"
str.sub!(/\A(déc.|juil.|sept.|jan.|juin|nov.|oct.|août|fév.|mar.|avr.|mai)/io, '')
# => 2011
str = "Avril 2011"
str.sub!(/\A(déc.|juil.|sept.|jan.|juin|nov.|oct.|août|fév.|mar.|avr.|mai)/io, '')
# => l 2011
# With French Date::Format values PATCHED (Fails)
str = "Apr 2011, 10:00 am"
str.sub!(/\A(oct|jul|jan|dec|jun|apr|feb|may|sep|aug|mar|nov)/io, '')
# => 2011, 10:00 am
str = "Feb 2011"
str.sub!(/\A(oct|jul|jan|dec|jun|apr|feb|may|sep|aug|mar|nov)/io, '')
# => 2011
str = "Avr. 2011"
str.sub!(/\A(déc.|juil.|sept.|jan.|juin|nov.|oct.|août|fév.|mar.|avr.|mai)/io, '')
# => nil
str = "Avril 2011"
str.sub!(/\A(déc.|juil.|sept.|jan.|juin|nov.|oct.|août|fév.|mar.|avr.|mai)/io, '')
# => nil
### Why is that? What could potentially go wrong ???
### Patch attempt available at https://github.com/ZenCocoon/I18n-date-parser
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