Module:Interwiki extra/data

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-- This module processes data from mw.site.interwikiMap for use with
-- [[Module:Interwiki]]. By loading the data with mw.loadData we ensure that
-- this is only done once per page parse.

local prefixes, urls, hosts = {}, {}, {}

local function makeCountedData(t, storeKey, counterKey, itemKey, item)
	t = t or {}
	t[storeKey] = t[storeKey] or {}
	t[storeKey][itemKey] = item
	t[counterKey] = t[counterKey] and t[counterKey] + 1 or 1
	return t
end

for prefix, data in pairs(mw.site.interwikiMap()) do
	local prefixData = {}
	for k, v in pairs(data) do
		prefixData[k] = v
	end
	local urlText = prefixData.url
	local urlObj = mw.uri.new(urlText)
	prefixData.url = urlObj
	prefixes[prefix] = prefixData

	local urlData = makeCountedData(
		urls[urlText],
		'prefixes',
		'nPrefixes',
		prefix,
		prefixData
	)
	urlData.url = urlObj
	urls[urlText] = urlData
end

for urlText, urlData in pairs(urls) do
	local host = urlData.url.host
	if host then
		local hostData = makeCountedData(
			hosts[host],
			'urls',
			'nUrls',
			urlText,
			urlData
		)
		hostData.host = host
		hosts[host] = hostData
	end
end

return {
	prefixes = prefixes,
	urls = urls,
	hosts = hosts
}