warriorgod/international-date-line-crossing

Display correct itinerary items when a ship crosses the IDL

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github.com/warriorGod/international-date-line-crossing

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v1.0.0 2017-04-07 02:11 UTC

Requires

Requires (Dev)

MIT c406ff8dc0c1cbf67849322787f41bf3d6ba3c51

  • gregor tramsak <gregor.tramsak.woop@gmail.com>

phptimezoneidl

This package is not auto-updated.

Last update: 2025-05-25 00:13:02 UTC

README

Display correct itinerary items when a ship crosses the IDL. The IDL crossing needs to be configured with one of the following options:

  • NO - normal item
  • EASTBOUND - item represents IDL crossing Eastbound, gaining a day. The item however is just a marker, it does not take any time (e.g. Day3: IDL crossing, Day3: watching sea-turtles mate).
  • EASTBOUND_DAY - item represents IDL crossing Eastbound, gaining a day. The item represents a day of activity and will count as a day as well (e.g. Day3: Crossing IDL and watching sea-turtles mate).
  • WESTBOUND - item represents IDL crossing Westbound, loosing a day. The item however is just a marker, it does not take any time (e.g. Day3: IDL crossing, Day3: watching sea-turtles mate).
  • WESTBOUND_DAY - item represents IDL crossing Westbound, loosing a day. The item represents a day of activity and will count as a day as well (e.g. Day3: Crossing IDL and watching sea-turtles mate).

Example crossings are:

  1. Ship sails from Asia to US across the pacific ocean (going EASTBOUND) - you gain a day as you are loosing hours all the time
Index Day Date IDL
0 1 2016-12-24
1 2 2016-12-25
2 2 2016-12-25 EASTBOUND
3 3 2016-12-25
4 4 2016-12-26
  1. Same, but the crossing represents a whole day
Index Day Date IDL
0 1 2016-12-24
1 2 2016-12-25
2 3 2016-12-26 EASTBOUND_DAY
3 4 2016-12-26
4 5 2016-12-27
  1. Ship sails from US to Asia across the pacific ocean (going EASTBOUND) - you loose a day as you are gaining hours all the time
Index Day Date IDL
0 1 2016-12-24
1 2 2016-12-25
2 2 2016-12-25 WESTBOUND
3 3 2016-12-27
4 4 2016-12-28
  1. Same, but the crossing represents a whole day
Index Day Date IDL
0 1 2016-12-24
1 2 2016-12-25
2 3 2016-12-26 WESTBOUND_DAY
3 4 2016-12-28
4 5 2016-12-29

Usage

Please see the tests for examples. Basically you define a list of itinerary items and set the IDL options on some of them. Days and dates will then be adjusted accordingly.