Module: Zena::Use::Dates::Common

Included in:
ControllerMethods, ModelMethods, ViewMethods
Defined in:
lib/zena/use/dates.rb

Instance Method Summary collapse

Instance Method Details

#format_date(thedate, opts = {}) ⇒ Object

This is like strftime but with better support for i18n (translate day names, month abbreviations, etc)



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# File 'lib/zena/use/dates.rb', line 12

def format_date(thedate, opts = {})
  return '' if thedate.blank?

  theformat, tz_name, lang = opts[:format], opts[:tz], opts[:lang]
  format = theformat || _('datetime')

  if tz_name
    if tz_name.kind_of?(TZInfo::Timezone)
      tz = tz_name
    else
      # display time local to event's timezone
      begin
        tz = TZInfo::Timezone.get(tz_name)
      rescue TZInfo::InvalidTimezoneIdentifier
        return "<span class='parser_error'>invalid timezone #{tz_name.inspect}.</span>"
      end
    end
  else
    tz = visitor.tz
  end

  if thedate.kind_of?(Time)
    utc_date = thedate
    adate = tz.utc_to_local(thedate)
  elsif thedate.kind_of?(String)
    begin
      adate    = Date.parse(thedate)
      utc_date = adate
    rescue
      return "<span class='parser_error'>invalid date #{thedate.inspect}</span>"
    end
  else
    adate    = thedate
    utc_date = adate
  end

  # TODO: REFACTOR TO something like:
  # with_locale(lang) do
  # ...
  # end
  if lang
    ::I18n.locale = lang
  end

  if format =~ /^age\/?(.*)$/
    format = $1.blank? ? _('long_date') : $1
    # how long ago/in how long is the date
    # FIXME: when using 'age', set expire_at (+1 minute, +1 hour, +1 day, never)
    age = (Time.now.utc - utc_date) / 60

    if age > 7 * 24 * 60
      # far in the past, use strftime
    elsif age >= 2 * 24 * 60
      # days
      return _("%{d} days ago") % {:d => (age/(24*60)).floor}
    elsif age >= 24 * 60
      # days
      return _("yesterday")
    elsif age >= 2 * 60
      # hours
      return _("%{h} hours ago") % {:h => (age/60).floor}
    elsif age >= 60
      return _("1 hour ago")
    elsif age > 2
      # minutes
      return _("%{m} minutes ago") % {:m => age.floor}
    elsif age > 0
      return _("1 minute ago")
    elsif age >= -1
      return _("in 1 minute")
    elsif age > -60
      return _("in %{m} minutes") % {:m => -age.ceil}
    elsif age > -2 * 60
      return _("in 1 hour")
    elsif age > -24 * 60
      return _("in %{h} hours") % {:h => -(age/60).ceil}
    elsif age > -2 * 24 * 60
      return _("tomorrow")
    elsif age > -7 * 24 * 60
      return _("in %{d} days") % {:d => -(age/(24*60)).ceil}
    else
      # too far in the future, use strftime
    end
  end

  # month name
  format = format.gsub("%b", _(adate.strftime("%b")) )
  format.gsub!("%B", _(adate.strftime("%B")) )

  # weekday name
  format.gsub!("%a", _(adate.strftime("%a")) )
  format.gsub!("%A", _(adate.strftime("%A")) )

  if lang
    # Restore
    ::I18n.locale = visitor.lang
  end

  adate.strftime(format)
end