Wikipedia:Lua/Modul/ISO3166/en

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ISO3166 – Module for conversion of territory code from ISO 3166 into one of the most current ones.

Historic countries are difficult to retrieve, since code assignment started about 1970 and they were partially reused for other targets later. Division of states does not point to current country, but unification. Only codes known to or reserved by ISO are covered, while other organisations like IOC often collide.

Functions for templates

f

Core functionality: convert code

Parameters:

• 1 – code to be converted (mandatory)
• 2 – requested format of result
  • A2 or A3 or NUM or A4
  • Default: A3
• 3 – redirect into other territory
  • 1 – historic state
  • Default: 0 – current country

failsafe

Version ID (local): 2019-10-14

Optional parameter:

• 1 – Minimum version or wikidata or ~

{{#invoke:ISO3166|failsafe}} yields 2019-10-14

With a parameter as ISO date it is compared whether the current module satisfies this version or later.

• {{#invoke:ISO3166|failsafe|2001-01-01}} returns: »2019-10-14«
• {{#invoke:ISO3166|failsafe|2099-01-01}} returns: »« – (empty), if minimal version condition not matched
• If keyword is wikidata, result is version ID registered on Wikidata (2019-10-14) or local if not found there.
• If keyword is ~, result is empty if local and Wikidata version are the same: ().

Returns:

• Empty, if minimal version condition not matched, or ~ and local version is synchronized.
• Version ID if no parameter, or if wikidata, or local if not found there, or not synchronized.

Examples and test page

There are tests available to illustrate this in practice.

Use in another Lua module

All of the above functions can be called from other Lua modules. Use require(); the following code checks for errors loading it:

local lucky, ISO3166 = pcall( require, "Module:ISO3166" )
if type( ISO3166 ) == "table" then
    ISO3166 = ISO3166.ISO3166()
else
    -- In the event of errors, ISO3166 is an error message.
    return "<span class=\"error\">" .. ISO3166 .. "</span>"
end

Then there is available:

ISO3166.f( access, alter, ancient )

1. access – code to be converted, string
2. alter – requested format of result, string, optional, A3
3. ancient – do not redirect into other territory, boolean, optional, false

returns: Code as string or false if not recognized

ISO3166.fetch( alert )

(internal) Retrieval of mw.loadData(), extend library object

1. alert – true for abort by error()
   • Default: false – empty table

ISO3166.failsafe( atleast )

1. atleast
   optional
   nil or minimum version or wikidata or ~ for synchronisation

returns: Version ID as string or false

Internal sub modules

/loadData

Global data will be converted into a single mw.loadData() table once per rendered page if needed.

• Yields object with components:
  • codes – map A2 → space separated sequence
  • reverse – map anything → A2
  • failsafe – serial ID

/maintain

Internal – code used as generator of commons:Data:ISO3166/reverse.tab data.

ISO3166.factory()

returns: JSON code, string

ISO3166.failsafe( atleast )

Supports template invocations:

• factory – Test/maintain
• failsafe

Global data

commons:Data:ISO3166/codes.tab

Assignment of A2 code on space separated list of related codes of the analogous territory.

In the list the most significant A2 A3 NUM A4 code is to be mentioned first.

Locally available as mw.loadData()-Module:ISO3166/loadData

commons:Data:ISO3166/reverse.tab

Assignment of all codes to the main A2 code.

Assignment of the same A2 code does mean that this code is valid.

Locally available as mw.loadData()-Module:ISO3166/loadData

Generated by /maintain.

Data is centralized and immediately updated, available to all wikis.

Maintainenance

When changing an entry in commons:Data:ISO3166/codes.tab updating of commons:Data:ISO3166/reverse.tab is required by Test/maintain.

Installation on other WMF projects

Follow the steps:

1. Copy main module Module:ISO3166 into your project.
   • If possible keep the name ISO3166.
   • If another name is required due to conflict or naming convention or non-latin script then choose a different one.
2. Register this module at d:Q69799761.
3. Copy the following sub module, and keep the chosen root name:
   • /loadData
4. Ready.
5. Consider translation of doc page.

Usage

This is a general library; use it anywhere.

Dependencies

None.