มอดูล:etymology

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---

local export = {}

-- For testing
local force_cat = false

local function term_error(terminfo)
	if terminfo.lang:hasType("family") then
		if terminfo.term and terminfo.term ~= "-" then
			require("Module:debug/track")("etymology/family/has-term")
		end
		
		terminfo.term = "-"
	end
	return terminfo
end


local function create_link(terminfo, template_name)
	local link = ""
	
	if terminfo.term == "-" then
		--[=[
		[[Special:WhatLinksHere/Wiktionary:Tracking/cognate/no-term]]
		[[Special:WhatLinksHere/Wiktionary:Tracking/derived/no-term]]
		[[Special:WhatLinksHere/Wiktionary:Tracking/borrowed/no-term]]
		[[Special:WhatLinksHere/Wiktionary:Tracking/calque/no-term]]
		]=]
		require("Module:debug/track")(template_name .. "/no-term")
	else
--		mw.log(terminfo.term)
		link = require("Module:links").full_link(terminfo, "term")
		if (link ~= "") then link = " " .. link end
	end
	
	return link
end


function export.process_and_create_link(terminfo, template_name)
	terminfo = term_error(terminfo)
	return create_link(terminfo, template_name or "derived")
end
	

function export.get_display_and_cat_name(source, raw)
	local display, cat_name
	if source:getCode() == "und" then
		display = "ยังไม่กำหนด"
		cat_name = "อื่น"
	elseif source:getCode() == "mul" then
		display = "[[w:ภาษาร่วม|ภาษาร่วม]]"
		cat_name = "ร่วม"
	elseif source:getCode() == "mul-tax" then
		display = "[[w:ชื่ออนุกรมวิธาน|ชื่ออนุกรมวิธาน]]"
		cat_name = "ชื่ออนุกรมวิธาน"
	else
		--display = raw and source:getCanonicalName() or source:makeWikipediaLink()
		display = raw and source:getCategoryName() or source:makeWikipediaLink()
		cat_name = source:getDisplayForm()
	end

	return display, (cat_name == "ชื่ออนุกรมวิธาน" and cat_name or "ภาษา" .. cat_name)
end


function export.insert_source_cat_get_display(data)
	local categories, lang, source = data.categories, data.lang, data.source
	local display, cat_name = export.get_display_and_cat_name(source, data.raw)

	if lang and not data.nocat then
		-- Add the category, but only if there is a current language
		if not categories then
			categories = {}
		end

		local langname = lang:getFullName()
		-- If `lang` is an etym-only language, we need to check both it and its parent full language against `source`.
		-- Otherwise if e.g. `lang` is Medieval Latin and `source` is Latin, we'll end up wrongly constructing a
		-- category 'Latin terms derived from Latin'.
		if lang:getCode() == source:getCode() or lang:getFullCode() == source:getCode() then
			--table.insert(categories, langname .. " terms borrowed back into " .. langname)
			table.insert(categories, "ศัพท์ภาษา" .. langname .. "ที่ยืมกลับไปภาษา" .. langname)
		else
			--table.insert(categories, langname .. " " .. (data.borrowing_type or "terms derived") .. " from " ..
			--	cat_name)
			table.insert(categories, "ศัพท์ภาษา" .. langname .. "ที่" .. (data.borrowing_type or "รับมา") .. "จาก" ..
				cat_name) -- ภาษาX or ชื่ออนุกรมวิธาน
		end
	end

	return display, categories
end


function export.format_source(data)
	local lang, sort_key = data.lang, data.sort_key
	-- [[Special:WhatLinksHere/Wiktionary:Tracking/etymology/sortkey]]
	if sort_key then
		require("Module:debug/track")("etymology/sortkey")
	end

	local display, categories = export.insert_source_cat_get_display(data)
	if lang and not data.nocat then
		-- Format categories, but only if there is a current language; {{cog}} currently gets no categories
		categories = require("Module:utilities").format_categories(categories, lang, sort_key, nil,
			data.force_cat or force_cat)
	else
		categories = ""
	end
	
	return "<span class=\"etyl\">" .. display .. categories .. "</span>"
end


-- Internal implementation of {{cognate|...}} template
function export.format_cognate(data)
	return export.format_derived {
		terminfo = data.terminfo,
		sort_key = data.sort_key,
		template_name = "cognate",
	}
end


-- Internal implementation of {{derived|...}} template
function export.format_derived(data)
	local lang, terminfo, sort_key, nocat, template_name =
		data.lang, data.terminfo, data.sort_key, data.nocat, data.template_name
	return export.format_source {
		lang = lang,
		source = terminfo.lang,
		sort_key = sort_key,
		nocat = nocat,
		borrowing_type = data.borrowing_type,
		force_cat = data.force_cat,
	} .. export.process_and_create_link(terminfo, template_name)
end

do
	-- Generate the non-ancestor error message.
	local function showLanguage(lang)
		local retval = ("%s (%s)"):format(lang:makeCategoryLink(), lang:getCode())
		if lang:hasType("etymology-only") then
			retval = retval .. (" (an etymology-only language whose regular parent is %s)"):format(
				showLanguage(lang:getParent()))
		end
		return retval
	end
	
	-- Check that `lang` has `otherlang` (which may be an etymology-only language) as an ancestor. Throw an error if not.
	function export.check_ancestor(lang, otherlang)
		-- FIXME: I don't know if this function works correctly with etym-only languages in `lang`. I have fixed up
		-- the module link code appropriately (June 2024) but the remaining logic is untouched.
		if lang:hasAncestor(otherlang) or mw.title.getCurrentTitle().nsText == "Template" then
			return
		end
		local ancestors, postscript = lang:getAncestors()
		local etymModuleLink = lang:hasType("etymology-only") and "[[Module:etymology languages/data]] or " or ""
		local moduleLink = "[[Module:"
			.. require("Module:languages").getDataModuleName(lang:getFullCode())
			.. "]]"
		if not ancestors[1] then
			postscript = showLanguage(lang) .. " has no ancestors."
		else
			local ancestorList = table.concat(
				require("Module:fun").map(
					showLanguage,
					ancestors),
				" and ")
			postscript = ("The ancestor%s of %s %s %s."):format(
				ancestors[2] and "s" or "", lang:getCanonicalName(),
				ancestors[2] and "are" or "is", ancestorList)
		end
		error(("%s is not set as an ancestor of %s in %s%s. %s")
			:format(showLanguage(otherlang), showLanguage(lang), etymModuleLink, moduleLink, postscript))
	end
end


-- Internal implementation of {{inherited|...}} template
function export.format_inherited(data)
	local lang, terminfo, sort_key, nocat = data.lang, data.terminfo, data.sort_key, data.nocat
	local source = terminfo.lang
	
	local categories = {}
	if not nocat then
		--table.insert(categories, lang:getFullName() .. " terms inherited from " .. source:getCanonicalName())
		table.insert(categories, "ศัพท์ภาษา" .. lang:getFullName() .. "ที่สืบทอดจากภาษา" .. source:getCanonicalName())
	end

	local link = export.process_and_create_link(terminfo, "inherited")
	
	export.check_ancestor(lang, source)

	return export.format_source {
		lang = lang,
		source = source,
		sort_key = sort_key,
		categories = categories,
		nocat = nocat,
		force_cat = data.force_cat,
	} .. link
end


function export.insert_borrowed_cat(categories, lang, source)
	local category
	-- Do the same check as in insert_source_cat_get_display() (inverted).
	if not (lang:getCode() == source:getCode() or lang:getFullCode() == source:getCode()) then
		-- If both are the same, we want e.g. [[:Category:English terms borrowed back into English]] not
		-- [[:Category:English terms borrowed from English]]; the former is inserted automatically by format_source().
		--category = " terms borrowed from " .. source:getDisplayForm()
		category = "ศัพท์ที่ยืมมาจากภาษา" .. source:getDisplayForm()
	end
	if category then
		--table.insert(categories, lang:getFullName() .. category)
		table.insert(categories, "ศัพท์ภาษา" .. lang:getFullName() .. mw.ustring.sub(category, 6))
	end
end


-- Internal implementation of {{borrowed|...}} template.
function export.format_borrowed(data)
	local lang, terminfo, sort_key, nocat = data.lang, data.terminfo, data.sort_key, data.nocat
	local source = terminfo.lang
	
	local categories = {}
	if not nocat then
		export.insert_borrowed_cat(categories, lang, source)
	end

	return export.format_source {
		lang = lang,
		source = source,
		sort_key = sort_key,
		categories = categories,
		nocat = nocat,
		force_cat = data.force_cat,
	} .. export.process_and_create_link(terminfo, "borrowed")
end

return export